1#! /usr/bin/env perl
2# -*- mode: perl; -*-
3# Copyright 2016-2021 The OpenSSL Project Authors. All Rights Reserved.
4#
5# Licensed under the Apache License 2.0 (the "License").  You may not use
6# this file except in compliance with the License.  You can obtain a copy
7# in the file LICENSE in the source distribution or at
8# https://www.openssl.org/source/license.html
9
10##  Configure -- OpenSSL source tree configuration script
11
12use 5.10.0;
13use strict;
14use Config;
15use FindBin;
16use lib "$FindBin::Bin/util/perl";
17use File::Basename;
18use File::Spec::Functions qw/:DEFAULT abs2rel rel2abs splitdir/;
19use File::Path qw/mkpath/;
20use OpenSSL::fallback "$FindBin::Bin/external/perl/MODULES.txt";
21use OpenSSL::Glob;
22use OpenSSL::Template;
23use OpenSSL::config;
24
25# see INSTALL.md for instructions.
26
27my $orig_death_handler = $SIG{__DIE__};
28$SIG{__DIE__} = \&death_handler;
29
30my $usage="Usage: Configure [no-<cipher> ...] [enable-<cipher> ...] [-Dxxx] [-lxxx] [-Lxxx] [-fxxx] [-Kxxx] [no-hw-xxx|no-hw] [[no-]threads] [[no-]shared] [[no-]zlib|zlib-dynamic] [no-asm] [no-egd] [sctp] [386] [--prefix=DIR] [--openssldir=OPENSSLDIR] [--with-xxx[=vvv]] [--config=FILE] os/compiler[:flags]\n";
31
32my $banner = <<"EOF";
33
34**********************************************************************
35***                                                                ***
36***   OpenSSL has been successfully configured                     ***
37***                                                                ***
38***   If you encounter a problem while building, please open an    ***
39***   issue on GitHub <https://github.com/openssl/openssl/issues>  ***
40***   and include the output from the following command:           ***
41***                                                                ***
42***       perl configdata.pm --dump                                ***
43***                                                                ***
44***   (If you are new to OpenSSL, you might want to consult the    ***
45***   'Troubleshooting' section in the INSTALL.md file first)      ***
46***                                                                ***
47**********************************************************************
48EOF
49
50# Options:
51#
52# --config      add the given configuration file, which will be read after
53#               any "Configurations*" files that are found in the same
54#               directory as this script.
55# --prefix      prefix for the OpenSSL installation, which includes the
56#               directories bin, lib, include, share/man, share/doc/openssl
57#               This becomes the value of INSTALLTOP in Makefile
58#               (Default: /usr/local)
59# --openssldir  OpenSSL data area, such as openssl.cnf, certificates and keys.
60#               If it's a relative directory, it will be added on the directory
61#               given with --prefix.
62#               This becomes the value of OPENSSLDIR in Makefile and in C.
63#               (Default: PREFIX/ssl)
64# --banner=".." Output specified text instead of default completion banner
65#
66# -w            Don't wait after showing a Configure warning
67#
68# --cross-compile-prefix Add specified prefix to binutils components.
69#
70# --api         One of 0.9.8, 1.0.0, 1.0.1, 1.0.2, 1.1.0, 1.1.1, or 3.0
71#               Define the public APIs as they were for that version
72#               including patch releases.  If 'no-deprecated' is also
73#               given, do not compile support for interfaces deprecated
74#               up to and including the specified OpenSSL version.
75#
76# no-hw-xxx     do not compile support for specific crypto hardware.
77#               Generic OpenSSL-style methods relating to this support
78#               are always compiled but return NULL if the hardware
79#               support isn't compiled.
80# no-hw         do not compile support for any crypto hardware.
81# [no-]threads  [don't] try to create a library that is suitable for
82#               multithreaded applications (default is "threads" if we
83#               know how to do it)
84# [no-]shared   [don't] try to create shared libraries when supported.
85# [no-]pic      [don't] try to build position independent code when supported.
86#               If disabled, it also disables shared and dynamic-engine.
87# no-asm        do not use assembler
88# no-egd        do not compile support for the entropy-gathering daemon APIs
89# [no-]zlib     [don't] compile support for zlib compression.
90# zlib-dynamic  Like "zlib", but the zlib library is expected to be a shared
91#               library and will be loaded in run-time by the OpenSSL library.
92# sctp          include SCTP support
93# no-uplink     Don't build support for UPLINK interface.
94# enable-weak-ssl-ciphers
95#               Enable weak ciphers that are disabled by default.
96# 386           generate 80386 code in assembly modules
97# no-sse2       disables IA-32 SSE2 code in assembly modules, the above
98#               mentioned '386' option implies this one
99# no-<cipher>   build without specified algorithm (dsa, idea, rc5, ...)
100# -<xxx> +<xxx> All options which are unknown to the 'Configure' script are
101# /<xxx>        passed through to the compiler. Unix-style options beginning
102#               with a '-' or '+' are recognized, as well as Windows-style
103#               options beginning with a '/'. If the option contains arguments
104#               separated by spaces, then the URL-style notation %20 can be
105#               used for the space character in order to avoid having to quote
106#               the option. For example, -opt%20arg gets expanded to -opt arg.
107#               In fact, any ASCII character can be encoded as %xx using its
108#               hexadecimal encoding.
109# -static       while -static is also a pass-through compiler option (and
110#               as such is limited to environments where it's actually
111#               meaningful), it triggers a number configuration options,
112#               namely no-pic, no-shared and no-threads. It is
113#               argued that the only reason to produce statically linked
114#               binaries (and in context it means executables linked with
115#               -static flag, and not just executables linked with static
116#               libcrypto.a) is to eliminate dependency on specific run-time,
117#               a.k.a. libc version. The mentioned config options are meant
118#               to achieve just that. Unfortunately on Linux it's impossible
119#               to eliminate the dependency completely for openssl executable
120#               because of getaddrinfo and gethostbyname calls, which can
121#               invoke dynamically loadable library facility anyway to meet
122#               the lookup requests. For this reason on Linux statically
123#               linked openssl executable has rather debugging value than
124#               production quality.
125#
126# BN_LLONG      use the type 'long long' in crypto/bn/bn.h
127# RC4_CHAR      use 'char' instead of 'int' for RC4_INT in crypto/rc4/rc4.h
128# Following are set automatically by this script
129#
130# MD5_ASM       use some extra md5 assembler,
131# SHA1_ASM      use some extra sha1 assembler, must define L_ENDIAN for x86
132# RMD160_ASM    use some extra ripemd160 assembler,
133# SHA256_ASM    sha256_block is implemented in assembler
134# SHA512_ASM    sha512_block is implemented in assembler
135# AES_ASM       AES_[en|de]crypt is implemented in assembler
136
137# Minimum warning options... any contributions to OpenSSL should at least
138# get past these.  Note that we only use these with C compilers, not with
139# C++ compilers.
140
141# -DPEDANTIC complements -pedantic and is meant to mask code that
142# is not strictly standard-compliant and/or implementation-specific,
143# e.g. inline assembly, disregards to alignment requirements, such
144# that -pedantic would complain about. Incidentally -DPEDANTIC has
145# to be used even in sanitized builds, because sanitizer too is
146# supposed to and does take notice of non-standard behaviour. Then
147# -pedantic with pre-C9x compiler would also complain about 'long
148# long' not being supported. As 64-bit algorithms are common now,
149# it grew impossible to resolve this without sizeable additional
150# code, so we just tell compiler to be pedantic about everything
151# but 'long long' type.
152
153my @gcc_devteam_warn = qw(
154    -DPEDANTIC -pedantic -Wno-long-long -DUNUSEDRESULT_DEBUG
155    -Wall
156    -Wmissing-declarations
157    -Wextra
158    -Wno-unused-parameter
159    -Wno-missing-field-initializers
160    -Wswitch
161    -Wsign-compare
162    -Wshadow
163    -Wformat
164    -Wtype-limits
165    -Wundef
166    -Werror
167    -Wmissing-prototypes
168    -Wstrict-prototypes
169);
170
171# These are used in addition to $gcc_devteam_warn when the compiler is clang.
172# TODO(openssl-team): fix problems and investigate if (at least) the
173# following warnings can also be enabled:
174#       -Wcast-align
175#       -Wunreachable-code -- no, too ugly/compiler-specific
176#       -Wlanguage-extension-token -- no, we use asm()
177#       -Wunused-macros -- no, too tricky for BN and _XOPEN_SOURCE etc
178#       -Wextended-offsetof -- no, needed in CMS ASN1 code
179my @clang_devteam_warn = qw(
180    -Wno-unknown-warning-option
181    -Wswitch-default
182    -Wno-parentheses-equality
183    -Wno-language-extension-token
184    -Wno-extended-offsetof
185    -Wconditional-uninitialized
186    -Wincompatible-pointer-types-discards-qualifiers
187    -Wmissing-variable-declarations
188);
189
190my @cl_devteam_warn = qw(
191    /WX
192);
193
194my $strict_warnings = 0;
195
196# As for $BSDthreads. Idea is to maintain "collective" set of flags,
197# which would cover all BSD flavors. -pthread applies to them all,
198# but is treated differently. OpenBSD expands is as -D_POSIX_THREAD
199# -lc_r, which is sufficient. FreeBSD 4.x expands it as -lc_r,
200# which has to be accompanied by explicit -D_THREAD_SAFE and
201# sometimes -D_REENTRANT. FreeBSD 5.x expands it as -lc_r, which
202# seems to be sufficient?
203our $BSDthreads="-pthread -D_THREAD_SAFE -D_REENTRANT";
204
205#
206# API compatibility name to version number mapping.
207#
208my $apitable = {
209    # This table expresses when API additions or changes can occur.
210    # The numbering used changes from 3.0 and on because we updated
211    # (solidified) our version numbering scheme at that point.
212
213    # From 3.0 and on, we internalise the given version number in decimal
214    # as MAJOR * 10000 + MINOR * 100 + 0
215    "3.0.0" => 30000,
216    "3.0"   => 30000,
217
218    # Note that before 3.0, we didn't have the same version number scheme.
219    # Still, the numbering we use here covers what we need.
220    "1.1.1" => 10101,
221    "1.1.0" => 10100,
222    "1.0.2" => 10002,
223    "1.0.1" => 10001,
224    "1.0.0" => 10000,
225    "0.9.8" =>   908,
226};
227
228# For OpenSSL::config::get_platform
229my %guess_opts = ();
230
231my $dryrun = 0;
232
233our %table = ();
234our %config = ();
235our %withargs = ();
236our $now_printing;      # set to current entry's name in print_table_entry
237                        # (todo: right thing would be to encapsulate name
238                        # into %target [class] and make print_table_entry
239                        # a method)
240
241# Forward declarations ###############################################
242
243# read_config(filename)
244#
245# Reads a configuration file and populates %table with the contents
246# (which the configuration file places in %targets).
247sub read_config;
248
249# resolve_config(target)
250#
251# Resolves all the late evaluations, inheritances and so on for the
252# chosen target and any target it inherits from.
253sub resolve_config;
254
255
256# Information collection #############################################
257
258# Unified build supports separate build dir
259my $srcdir = catdir(absolutedir(dirname($0))); # catdir ensures local syntax
260my $blddir = catdir(absolutedir("."));         # catdir ensures local syntax
261
262# File::Spec::Unix doesn't detect case insensitivity, so we make sure to
263# check if the source and build directory are really the same, and make
264# them so.  This avoids all kinds of confusion later on.
265# We must check @File::Spec::ISA rather than using File::Spec->isa() to
266# know if File::Spec ended up loading File::Spec::Unix.
267$srcdir = $blddir
268    if (grep(/::Unix$/, @File::Spec::ISA)
269        && samedir($srcdir, $blddir));
270
271my $dofile = abs2rel(catfile($srcdir, "util/dofile.pl"));
272
273my $local_config_envname = 'OPENSSL_LOCAL_CONFIG_DIR';
274
275$config{sourcedir} = abs2rel($srcdir, $blddir);
276$config{builddir} = abs2rel($blddir, $blddir);
277# echo -n 'holy hand grenade of antioch' | openssl sha256
278$config{FIPSKEY} =
279    'f4556650ac31d35461610bac4ed81b1a181b2d8a43ea2854cbae22ca74560813';
280
281# Collect reconfiguration information if needed
282my @argvcopy=@ARGV;
283
284if (grep /^reconf(igure)?$/, @argvcopy) {
285    die "reconfiguring with other arguments present isn't supported"
286        if scalar @argvcopy > 1;
287    if (-f "./configdata.pm") {
288        my $file = "./configdata.pm";
289        unless (my $return = do $file) {
290            die "couldn't parse $file: $@" if $@;
291            die "couldn't do $file: $!"    unless defined $return;
292            die "couldn't run $file"       unless $return;
293        }
294
295        @argvcopy = defined($configdata::config{perlargv}) ?
296            @{$configdata::config{perlargv}} : ();
297        die "Incorrect data to reconfigure, please do a normal configuration\n"
298            if (grep(/^reconf/,@argvcopy));
299        $config{perlenv} = $configdata::config{perlenv} // {};
300    } else {
301        die "Insufficient data to reconfigure, please do a normal configuration\n";
302    }
303}
304
305$config{perlargv} = [ @argvcopy ];
306
307# Historical: if known directories in crypto/ have been removed, it means
308# that those sub-systems are disabled.
309# (the other option would be to removed them from the SUBDIRS statement in
310# crypto/build.info)
311# We reverse the input list for cosmetic purely reasons, to compensate that
312# 'unshift' adds at the front of the list (i.e. in reverse input order).
313foreach ( reverse sort( 'aes', 'aria', 'bf', 'camellia', 'cast', 'des', 'dh',
314                        'dsa', 'ec', 'hmac', 'idea', 'md2', 'md5', 'mdc2',
315                        'rc2', 'rc4', 'rc5', 'ripemd', 'seed', 'sha',
316                        'sm2', 'sm3', 'sm4') ) {
317    unshift @argvcopy, "no-$_" if ! -d catdir($srcdir, 'crypto', $_);
318}
319
320# Collect version numbers
321my %version = ();
322
323collect_information(
324    collect_from_file(catfile($srcdir,'VERSION.dat')),
325    qr/\s*(\w+)\s*=\s*(.*?)\s*$/ =>
326        sub {
327            # Only define it if there is a value at all
328            if ($2 ne '') {
329                my $k = $1;
330                my $v = $2;
331                # Some values are quoted.  Trim the quotes
332                $v = $1 if $v =~ /^"(.*)"$/;
333                $version{uc $k} = $v;
334            }
335        },
336    "OTHERWISE" =>
337        sub { die "Something wrong with this line:\n$_\nin $srcdir/VERSION.dat" },
338    );
339
340$config{major} = $version{MAJOR} // 'unknown';
341$config{minor} = $version{MINOR} // 'unknown';
342$config{patch} = $version{PATCH} // 'unknown';
343$config{prerelease} =
344    defined $version{PRE_RELEASE_TAG} ? "-$version{PRE_RELEASE_TAG}" : '';
345$config{build_metadata} =
346    defined $version{BUILD_METADATA} ? "+$version{BUILD_METADATA}" : '';
347$config{shlib_version} = $version{SHLIB_VERSION} // 'unknown';
348$config{release_date} = $version{RELEASE_DATE} // 'xx XXX xxxx';
349
350$config{version} = "$config{major}.$config{minor}.$config{patch}";
351$config{full_version} = "$config{version}$config{prerelease}$config{build_metadata}";
352
353die "erroneous version information in VERSION.dat: ",
354    "$config{version}, $config{shlib_version}\n"
355    unless (defined $version{MAJOR}
356            && defined $version{MINOR}
357            && defined $version{PATCH}
358            && defined $version{SHLIB_VERSION});
359
360# Collect target configurations
361
362my $pattern = catfile(dirname($0), "Configurations", "*.conf");
363foreach (sort glob($pattern)) {
364    &read_config($_);
365}
366
367if (defined env($local_config_envname)) {
368    if ($^O eq 'VMS') {
369        # VMS environment variables are logical names,
370        # which can be used as is
371        $pattern = $local_config_envname . ':' . '*.conf';
372    } else {
373        $pattern = catfile(env($local_config_envname), '*.conf');
374    }
375
376    foreach (sort glob($pattern)) {
377        &read_config($_);
378    }
379}
380
381# Save away perl command information
382$config{perl_cmd} = $^X;
383$config{perl_version} = $Config{version};
384$config{perl_archname} = $Config{archname};
385
386$config{prefix}="";
387$config{openssldir}="";
388$config{processor}="";
389$config{libdir}="";
390my $auto_threads=1;    # enable threads automatically? true by default
391my $default_ranlib;
392
393# Known TLS and DTLS protocols
394my @tls = qw(ssl3 tls1 tls1_1 tls1_2 tls1_3);
395my @dtls = qw(dtls1 dtls1_2);
396
397# Explicitly known options that are possible to disable.  They can
398# be regexps, and will be used like this: /^no-${option}$/
399# For developers: keep it sorted alphabetically
400
401my @disablables = (
402    "acvp-tests",
403    "afalgeng",
404    "aria",
405    "asan",
406    "asm",
407    "async",
408    "autoalginit",
409    "autoerrinit",
410    "autoload-config",
411    "bf",
412    "blake2",
413    "buildtest-c++",
414    "bulk",
415    "cached-fetch",
416    "camellia",
417    "capieng",
418    "cast",
419    "chacha",
420    "cmac",
421    "cmp",
422    "cms",
423    "comp",
424    "crypto-mdebug",
425    "ct",
426    "deprecated",
427    "des",
428    "devcryptoeng",
429    "dgram",
430    "dh",
431    "dsa",
432    "dso",
433    "dtls",
434    "dynamic-engine",
435    "ec",
436    "ec2m",
437    "ec_nistp_64_gcc_128",
438    "ecdh",
439    "ecdsa",
440    "egd",
441    "engine",
442    "err",
443    "external-tests",
444    "filenames",
445    "fips",
446    "fips-securitychecks",
447    "fuzz-afl",
448    "fuzz-libfuzzer",
449    "gost",
450    "idea",
451    "ktls",
452    "legacy",
453    "loadereng",
454    "makedepend",
455    "md2",
456    "md4",
457    "mdc2",
458    "module",
459    "msan",
460    "multiblock",
461    "nextprotoneg",
462    "ocb",
463    "ocsp",
464    "padlockeng",
465    "pic",
466    "pinshared",
467    "poly1305",
468    "posix-io",
469    "psk",
470    "rc2",
471    "rc4",
472    "rc5",
473    "rdrand",
474    "rfc3779",
475    "rmd160",
476    "scrypt",
477    "sctp",
478    "secure-memory",
479    "seed",
480    "shared",
481    "siphash",
482    "siv",
483    "sm2",
484    "sm3",
485    "sm4",
486    "sock",
487    "srp",
488    "srtp",
489    "sse2",
490    "ssl",
491    "ssl-trace",
492    "static-engine",
493    "stdio",
494    "tests",
495    "threads",
496    "tls",
497    "trace",
498    "ts",
499    "ubsan",
500    "ui-console",
501    "unit-test",
502    "uplink",
503    "weak-ssl-ciphers",
504    "whirlpool",
505    "zlib",
506    "zlib-dynamic",
507    );
508foreach my $proto ((@tls, @dtls))
509        {
510        push(@disablables, $proto);
511        push(@disablables, "$proto-method") unless $proto eq "tls1_3";
512        }
513
514# Internal disablables, for aliasing purposes.  They serve no special
515# purpose here, but allow scripts to get to know them through configdata.pm,
516# where these are merged with @disablables.
517# The actual aliasing mechanism is done via %disable_cascades
518my @disablables_int = qw(
519    crmf
520    );
521
522my %deprecated_disablables = (
523    "ssl2" => undef,
524    "buf-freelists" => undef,
525    "crypto-mdebug-backtrace" => undef,
526    "hw" => "hw",               # causes cascade, but no macro
527    "hw-padlock" => "padlockeng",
528    "ripemd" => "rmd160",
529    "ui" => "ui-console",
530    "heartbeats" => undef,
531    );
532
533# All of the following are disabled by default:
534
535our %disabled = ( # "what"         => "comment"
536                  "fips"                => "default",
537                  "asan"                => "default",
538                  "buildtest-c++"       => "default",
539                  "crypto-mdebug"       => "default",
540                  "crypto-mdebug-backtrace" => "default",
541                  "devcryptoeng"        => "default",
542                  "ec_nistp_64_gcc_128" => "default",
543                  "egd"                 => "default",
544                  "external-tests"      => "default",
545                  "fuzz-afl"            => "default",
546                  "fuzz-libfuzzer"      => "default",
547                  "ktls"                => "default",
548                  "md2"                 => "default",
549                  "msan"                => "default",
550                  "rc5"                 => "default",
551                  "sctp"                => "default",
552                  "ssl3"                => "default",
553                  "ssl3-method"         => "default",
554                  "trace"               => "default",
555                  "ubsan"               => "default",
556                  "unit-test"           => "default",
557                  "weak-ssl-ciphers"    => "default",
558                  "zlib"                => "default",
559                  "zlib-dynamic"        => "default",
560                );
561
562# Note: => pair form used for aesthetics, not to truly make a hash table
563my @disable_cascades = (
564    # "what"            => [ "cascade", ... ]
565    "bulk"              => [ "shared", "dso",
566                             "aria", "async", "autoload-config",
567                             "blake2", "bf", "camellia", "cast", "chacha",
568                             "cmac", "cms", "cmp", "comp", "ct",
569                             "des", "dgram", "dh", "dsa",
570                             "ec", "engine",
571                             "filenames",
572                             "idea", "ktls",
573                             "md4", "multiblock", "nextprotoneg",
574                             "ocsp", "ocb", "poly1305", "psk",
575                             "rc2", "rc4", "rmd160",
576                             "seed", "siphash", "siv",
577                             "sm3", "sm4", "srp",
578                             "srtp", "ssl3-method", "ssl-trace",
579                             "ts", "ui-console", "whirlpool",
580                             "fips-securitychecks" ],
581    sub { $config{processor} eq "386" }
582                        => [ "sse2" ],
583    "ssl"               => [ "ssl3" ],
584    "ssl3-method"       => [ "ssl3" ],
585    "zlib"              => [ "zlib-dynamic" ],
586    "des"               => [ "mdc2" ],
587    "ec"                => [ "ec2m", "ecdsa", "ecdh", "sm2", "gost" ],
588    "dgram"             => [ "dtls", "sctp" ],
589    "sock"              => [ "dgram" ],
590    "dtls"              => [ @dtls ],
591    sub { 0 == scalar grep { !$disabled{$_} } @dtls }
592                        => [ "dtls" ],
593
594    "tls"               => [ @tls ],
595    sub { 0 == scalar grep { !$disabled{$_} } @tls }
596                        => [ "tls" ],
597
598    "crypto-mdebug"     => [ "crypto-mdebug-backtrace" ],
599
600    # If no modules, then no dynamic engines either
601    "module"            => [ "dynamic-engine" ],
602
603    # Without shared libraries, dynamic engines aren't possible.
604    # This is due to them having to link with libcrypto and register features
605    # using the ENGINE functionality, and since that relies on global tables,
606    # those *have* to be exacty the same as the ones accessed from the app,
607    # which cannot be guaranteed if shared libraries aren't present.
608    # (note that even with shared libraries, both the app and dynamic engines
609    # must be linked with the same library)
610    "shared"            => [ "dynamic-engine", "uplink" ],
611    "dso"               => [ "dynamic-engine", "module" ],
612    # Other modules don't necessarily have to link with libcrypto, so shared
613    # libraries do not have to be a condition to produce those.
614
615    # Without position independent code, there can be no shared libraries
616    # or modules.
617    "pic"               => [ "shared", "module" ],
618
619    "module"            => [ "fips", "dso" ],
620
621    "engine"            => [ "dynamic-engine", grep(/eng$/, @disablables) ],
622    "dynamic-engine"    => [ "loadereng" ],
623    "hw"                => [ "padlockeng" ],
624
625    # no-autoalginit is only useful when building non-shared
626    "autoalginit"       => [ "shared", "apps", "fips" ],
627
628    "stdio"             => [ "apps", "capieng", "egd" ],
629    "apps"              => [ "tests" ],
630    "tests"             => [ "external-tests" ],
631    "comp"              => [ "zlib" ],
632    "sm3"               => [ "sm2" ],
633    sub { !$disabled{"unit-test"} } => [ "heartbeats" ],
634
635    sub { !$disabled{"msan"} } => [ "asm" ],
636
637    "cmac"              => [ "siv" ],
638    "legacy"            => [ "md2" ],
639
640    "cmp"               => [ "crmf" ],
641
642    "fips"              => [ "fips-securitychecks", "acvp-tests" ],
643
644    "deprecated-3.0"    => [ "engine", "srp" ]
645    );
646
647# Avoid protocol support holes.  Also disable all versions below N, if version
648# N is disabled while N+1 is enabled.
649#
650my @list = (reverse @tls);
651while ((my $first, my $second) = (shift @list, shift @list)) {
652    last unless @list;
653    push @disable_cascades, ( sub { !$disabled{$first} && $disabled{$second} }
654                              => [ @list ] );
655    unshift @list, $second;
656}
657my @list = (reverse @dtls);
658while ((my $first, my $second) = (shift @list, shift @list)) {
659    last unless @list;
660    push @disable_cascades, ( sub { !$disabled{$first} && $disabled{$second} }
661                              => [ @list ] );
662    unshift @list, $second;
663}
664
665# Explicit "no-..." options will be collected in %disabled along with the defaults.
666# To remove something from %disabled, use "enable-foo".
667# For symmetry, "disable-foo" is a synonym for "no-foo".
668
669# For the "make variables" CPPINCLUDES and CPPDEFINES, we support lists with
670# platform specific list separators.  Users from those platforms should
671# recognise those separators from how you set up the PATH to find executables.
672# The default is the Unix like separator, :, but as an exception, we also
673# support the space as separator.
674my $list_separator_re =
675    { VMS           => qr/(?<!\^),/,
676      MSWin32       => qr/(?<!\\);/ } -> {$^O} // qr/(?<!\\)[:\s]/;
677# All the "make variables" we support
678# Some get pre-populated for the sake of backward compatibility
679# (we supported those before the change to "make variable" support.
680my %user = (
681    AR          => env('AR'),
682    ARFLAGS     => [],
683    AS          => undef,
684    ASFLAGS     => [],
685    CC          => env('CC'),
686    CFLAGS      => [ env('CFLAGS') || () ],
687    CXX         => env('CXX'),
688    CXXFLAGS    => [ env('CXXFLAGS') || () ],
689    CPP         => undef,
690    CPPFLAGS    => [ env('CPPFLAGS') || () ],  # -D, -I, -Wp,
691    CPPDEFINES  => [],  # Alternative for -D
692    CPPINCLUDES => [],  # Alternative for -I
693    CROSS_COMPILE => env('CROSS_COMPILE'),
694    HASHBANGPERL=> env('HASHBANGPERL') || env('PERL'),
695    LD          => undef,
696    LDFLAGS     => [ env('LDFLAGS') || () ],  # -L, -Wl,
697    LDLIBS      => [ env('LDLIBS') || () ],  # -l
698    MT          => undef,
699    MTFLAGS     => [],
700    PERL        => env('PERL') || ($^O ne "VMS" ? $^X : "perl"),
701    RANLIB      => env('RANLIB'),
702    RC          => env('RC') || env('WINDRES'),
703    RCFLAGS     => [ env('RCFLAGS') || () ],
704    RM          => undef,
705   );
706# Info about what "make variables" may be prefixed with the cross compiler
707# prefix.  This should NEVER mention any such variable with a list for value.
708my @user_crossable = qw ( AR AS CC CXX CPP LD MT RANLIB RC );
709# The same but for flags given as Configure options.  These are *additional*
710# input, as opposed to the VAR=string option that override the corresponding
711# config target attributes
712my %useradd = (
713    CPPDEFINES  => [],
714    CPPINCLUDES => [],
715    CPPFLAGS    => [],
716    CFLAGS      => [],
717    CXXFLAGS    => [],
718    LDFLAGS     => [],
719    LDLIBS      => [],
720    RCFLAGS     => [],
721   );
722
723my %user_synonyms = (
724    HASHBANGPERL=> 'PERL',
725    RC          => 'WINDRES',
726   );
727
728# Some target attributes have been renamed, this is the translation table
729my %target_attr_translate =(
730    ar          => 'AR',
731    as          => 'AS',
732    cc          => 'CC',
733    cxx         => 'CXX',
734    cpp         => 'CPP',
735    hashbangperl => 'HASHBANGPERL',
736    ld          => 'LD',
737    mt          => 'MT',
738    ranlib      => 'RANLIB',
739    rc          => 'RC',
740    rm          => 'RM',
741   );
742
743# Initialisers coming from 'config' scripts
744$config{defines} = [ split(/$list_separator_re/, env('__CNF_CPPDEFINES')) ];
745$config{includes} = [ split(/$list_separator_re/, env('__CNF_CPPINCLUDES')) ];
746$config{cppflags} = [ env('__CNF_CPPFLAGS') || () ];
747$config{cflags} = [ env('__CNF_CFLAGS') || () ];
748$config{cxxflags} = [ env('__CNF_CXXFLAGS') || () ];
749$config{lflags} = [ env('__CNF_LDFLAGS') || () ];
750$config{ex_libs} = [ env('__CNF_LDLIBS') || () ];
751
752$config{openssl_api_defines}=[];
753$config{openssl_sys_defines}=[];
754$config{openssl_feature_defines}=[];
755$config{options}="";
756$config{build_type} = "release";
757my $target="";
758
759my %cmdvars = ();               # Stores FOO='blah' type arguments
760my %unsupported_options = ();
761my %deprecated_options = ();
762# If you change this, update apps/version.c
763my @known_seed_sources = qw(getrandom devrandom os egd none rdcpu librandom);
764my @seed_sources = ();
765while (@argvcopy)
766        {
767        $_ = shift @argvcopy;
768
769        # Support env variable assignments among the options
770        if (m|^(\w+)=(.+)?$|)
771                {
772                $cmdvars{$1} = $2;
773                # Every time a variable is given as a configuration argument,
774                # it acts as a reset if the variable.
775                if (exists $user{$1})
776                        {
777                        $user{$1} = ref $user{$1} eq "ARRAY" ? [] : undef;
778                        }
779                #if (exists $useradd{$1})
780                #       {
781                #       $useradd{$1} = [];
782                #       }
783                next;
784                }
785
786        # VMS is a case insensitive environment, and depending on settings
787        # out of our control, we may receive options uppercased.  Let's
788        # downcase at least the part before any equal sign.
789        if ($^O eq "VMS")
790                {
791                s/^([^=]*)/lc($1)/e;
792                }
793
794        # some people just can't read the instructions, clang people have to...
795        s/^-no-(?!integrated-as)/no-/;
796
797        # rewrite some options in "enable-..." form
798        s /^-?-?shared$/enable-shared/;
799        s /^sctp$/enable-sctp/;
800        s /^threads$/enable-threads/;
801        s /^zlib$/enable-zlib/;
802        s /^zlib-dynamic$/enable-zlib-dynamic/;
803        s /^fips$/enable-fips/;
804
805        if (/^(no|disable|enable)-(.+)$/)
806                {
807                my $word = $2;
808                if ($word !~ m|hw(?:-.+)| # special treatment for hw regexp opt
809                        && !exists $deprecated_disablables{$word}
810                        && !grep { $word eq $_ } @disablables)
811                        {
812                        $unsupported_options{$_} = 1;
813                        next;
814                        }
815                }
816        if (/^no-(.+)$/ || /^disable-(.+)$/)
817                {
818                foreach my $proto ((@tls, @dtls))
819                        {
820                        if ($1 eq "$proto-method")
821                                {
822                                $disabled{"$proto"} = "option($proto-method)";
823                                last;
824                                }
825                        }
826                if ($1 eq "dtls")
827                        {
828                        foreach my $proto (@dtls)
829                                {
830                                $disabled{$proto} = "option(dtls)";
831                                }
832                        $disabled{"dtls"} = "option(dtls)";
833                        }
834                elsif ($1 eq "ssl")
835                        {
836                        # Last one of its kind
837                        $disabled{"ssl3"} = "option(ssl)";
838                        }
839                elsif ($1 eq "tls")
840                        {
841                        # XXX: Tests will fail if all SSL/TLS
842                        # protocols are disabled.
843                        foreach my $proto (@tls)
844                                {
845                                $disabled{$proto} = "option(tls)";
846                                }
847                        }
848                elsif ($1 eq "static-engine")
849                        {
850                        delete $disabled{"dynamic-engine"};
851                        }
852                elsif ($1 eq "dynamic-engine")
853                        {
854                        $disabled{"dynamic-engine"} = "option";
855                        }
856                elsif (exists $deprecated_disablables{$1})
857                        {
858                        $deprecated_options{$_} = 1;
859                        if (defined $deprecated_disablables{$1})
860                                {
861                                $disabled{$deprecated_disablables{$1}} = "option";
862                                }
863                        }
864                elsif ($1 =~ m|hw(?:-.+)|) # deprecate hw options in regexp form
865                        {
866                        $deprecated_options{$_} = 1;
867                        }
868                else
869                        {
870                        $disabled{$1} = "option";
871                        }
872                # No longer an automatic choice
873                $auto_threads = 0 if ($1 eq "threads");
874                }
875        elsif (/^enable-(.+)$/)
876                {
877                if ($1 eq "static-engine")
878                        {
879                        $disabled{"dynamic-engine"} = "option";
880                        }
881                elsif ($1 eq "dynamic-engine")
882                        {
883                        delete $disabled{"dynamic-engine"};
884                        }
885                elsif ($1 eq "zlib-dynamic")
886                        {
887                        delete $disabled{"zlib"};
888                        }
889                my $algo = $1;
890                delete $disabled{$algo};
891
892                # No longer an automatic choice
893                $auto_threads = 0 if ($1 eq "threads");
894                }
895        elsif (/^-d$/)          # From older 'config'
896                {
897                $config{build_type} = "debug";
898                }
899        elsif (/^-v$/)          # From older 'config'
900                {
901                $guess_opts{verbose} = 1;
902                }
903        elsif (/^-w$/)
904                {
905                $guess_opts{nowait} = 1;
906                }
907        elsif (/^-t$/)          # From older 'config'
908                {
909                $dryrun = 1;
910                }
911        elsif (/^--strict-warnings$/)
912                {
913                # Pretend that our strict flags is a C flag, and replace it
914                # with the proper flags later on
915                push @{$useradd{CFLAGS}}, '--ossl-strict-warnings';
916                $strict_warnings=1;
917                }
918        elsif (/^--debug$/)
919                {
920                $config{build_type} = "debug";
921                }
922        elsif (/^--release$/)
923                {
924                $config{build_type} = "release";
925                }
926        elsif (/^386$/)
927                { $config{processor}=386; }
928        elsif (/^rsaref$/)
929                {
930                # No RSAref support any more since it's not needed.
931                # The check for the option is there so scripts aren't
932                # broken
933                }
934        elsif (m|^[-+/]|)
935                {
936                if (/^--prefix=(.*)$/)
937                        {
938                        $config{prefix}=$1;
939                        die "Directory given with --prefix MUST be absolute\n"
940                                unless file_name_is_absolute($config{prefix});
941                        }
942                elsif (/^--api=(.*)$/)
943                        {
944                        my $api = $1;
945                        die "Unknown API compatibility level $api"
946                                unless defined $apitable->{$api};
947                        $config{api}=$apitable->{$api};
948                        }
949                elsif (/^--libdir=(.*)$/)
950                        {
951                        $config{libdir}=$1;
952                        }
953                elsif (/^--openssldir=(.*)$/)
954                        {
955                        $config{openssldir}=$1;
956                        }
957                elsif (/^--with-zlib-lib=(.*)$/)
958                        {
959                        $withargs{zlib_lib}=$1;
960                        }
961                elsif (/^--with-zlib-include=(.*)$/)
962                        {
963                        $withargs{zlib_include}=$1;
964                        }
965                elsif (/^--with-fuzzer-lib=(.*)$/)
966                        {
967                        $withargs{fuzzer_lib}=$1;
968                        }
969                elsif (/^--with-fuzzer-include=(.*)$/)
970                        {
971                        $withargs{fuzzer_include}=$1;
972                        }
973                elsif (/^--with-rand-seed=(.*)$/)
974                        {
975                        foreach my $x (split(m|,|, $1))
976                            {
977                            die "Unknown --with-rand-seed choice $x\n"
978                                if ! grep { $x eq $_ } @known_seed_sources;
979                            push @seed_sources, $x;
980                            }
981                        }
982                elsif (/^--fips-key=(.*)$/)
983                        {
984                        $user{FIPSKEY}=lc($1);
985                        die "Non-hex character in FIPS key\n"
986                           if $user{FIPSKEY} =~ /[^a-f0-9]/;
987                        die "FIPS key must have even number of characters\n"
988                           if length $1 & 1;
989                        die "FIPS key too long (64 bytes max)\n"
990                           if length $1 > 64;
991                        }
992                elsif (/^--banner=(.*)$/)
993                        {
994                        $banner = $1 . "\n";
995                        }
996                elsif (/^--cross-compile-prefix=(.*)$/)
997                        {
998                        $user{CROSS_COMPILE}=$1;
999                        }
1000                elsif (/^--config=(.*)$/)
1001                        {
1002                        read_config $1;
1003                        }
1004                elsif (/^-l(.*)$/)
1005                        {
1006                        push @{$useradd{LDLIBS}}, $_;
1007                        }
1008                elsif (/^-framework$/)
1009                        {
1010                        push @{$useradd{LDLIBS}}, $_, shift(@argvcopy);
1011                        }
1012                elsif (/^-L(.*)$/ or /^-Wl,/)
1013                        {
1014                        push @{$useradd{LDFLAGS}}, $_;
1015                        }
1016                elsif (/^-rpath$/ or /^-R$/)
1017                        # -rpath is the OSF1 rpath flag
1018                        # -R is the old Solaris rpath flag
1019                        {
1020                        my $rpath = shift(@argvcopy) || "";
1021                        $rpath .= " " if $rpath ne "";
1022                        push @{$useradd{LDFLAGS}}, $_, $rpath;
1023                        }
1024                elsif (/^-static$/)
1025                        {
1026                        push @{$useradd{LDFLAGS}}, $_;
1027                        }
1028                elsif (m|^[-/]D(.*)$|)
1029                        {
1030                        push @{$useradd{CPPDEFINES}}, $1;
1031                        }
1032                elsif (m|^[-/]I(.*)$|)
1033                        {
1034                        push @{$useradd{CPPINCLUDES}}, $1;
1035                        }
1036                elsif (/^-Wp,$/)
1037                        {
1038                        push @{$useradd{CPPFLAGS}}, $1;
1039                        }
1040                else    # common if (/^[-+]/), just pass down...
1041                        {
1042                        # Treat %xx as an ASCII code (e.g. replace %20 by a space character).
1043                        # This provides a simple way to pass options with arguments separated
1044                        # by spaces without quoting (e.g. -opt%20arg translates to -opt arg).
1045                        $_ =~ s/%([0-9a-f]{1,2})/chr(hex($1))/gei;
1046                        push @{$useradd{CFLAGS}}, $_;
1047                        push @{$useradd{CXXFLAGS}}, $_;
1048                        }
1049                }
1050        elsif (m|^/|)
1051                {
1052                # Treat %xx as an ASCII code (e.g. replace %20 by a space character).
1053                # This provides a simple way to pass options with arguments separated
1054                # by spaces without quoting (e.g. /opt%20arg translates to /opt arg).
1055                $_ =~ s/%([0-9a-f]{1,2})/chr(hex($1))/gei;
1056                push @{$useradd{CFLAGS}}, $_;
1057                push @{$useradd{CXXFLAGS}}, $_;
1058                }
1059        else
1060                {
1061                die "target already defined - $target (offending arg: $_)\n" if ($target ne "");
1062                $target=$_;
1063                }
1064        unless ($_ eq $target || /^no-/ || /^disable-/)
1065                {
1066                # "no-..." follows later after implied deactivations
1067                # have been derived.  (Don't take this too seriously,
1068                # we really only write OPTIONS to the Makefile out of
1069                # nostalgia.)
1070
1071                if ($config{options} eq "")
1072                        { $config{options} = $_; }
1073                else
1074                        { $config{options} .= " ".$_; }
1075                }
1076        }
1077
1078if (keys %deprecated_options)
1079        {
1080        warn "***** Deprecated options: ",
1081                join(", ", keys %deprecated_options), "\n";
1082        }
1083if (keys %unsupported_options)
1084        {
1085        die "***** Unsupported options: ",
1086                join(", ", keys %unsupported_options), "\n";
1087        }
1088
1089# If any %useradd entry has been set, we must check that the "make
1090# variables" haven't been set.  We start by checking of any %useradd entry
1091# is set.
1092if (grep { scalar @$_ > 0 } values %useradd) {
1093    # Hash of env / make variables names.  The possible values are:
1094    # 1 - "make vars"
1095    # 2 - %useradd entry set
1096    # 3 - both set
1097    my %detected_vars =
1098        map { my $v = 0;
1099              $v += 1 if $cmdvars{$_};
1100              $v += 2 if @{$useradd{$_}};
1101              $_ => $v }
1102        keys %useradd;
1103
1104    # If any of the corresponding "make variables" is set, we error
1105    if (grep { $_ & 1 } values %detected_vars) {
1106        my $names = join(', ', grep { $detected_vars{$_} > 0 }
1107                               sort keys %detected_vars);
1108        die <<"_____";
1109***** Mixing make variables and additional compiler/linker flags as
1110***** configure command line option is not permitted.
1111***** Affected make variables: $names
1112_____
1113    }
1114}
1115
1116# Check through all supported command line variables to see if any of them
1117# were set, and canonicalise the values we got.  If no compiler or linker
1118# flag or anything else that affects %useradd was set, we also check the
1119# environment for values.
1120my $anyuseradd =
1121    grep { defined $_ && (ref $_ ne 'ARRAY' || @$_) } values %useradd;
1122foreach (keys %user) {
1123    my $value = $cmdvars{$_};
1124    $value //= env($_) unless $anyuseradd;
1125    $value //=
1126        defined $user_synonyms{$_} ? $cmdvars{$user_synonyms{$_}} : undef;
1127    $value //= defined $user_synonyms{$_} ? env($user_synonyms{$_}) : undef
1128        unless $anyuseradd;
1129
1130    if (defined $value) {
1131        if (ref $user{$_} eq 'ARRAY') {
1132            if ($_ eq 'CPPDEFINES' || $_ eq 'CPPINCLUDES') {
1133                $user{$_} = [ split /$list_separator_re/, $value ];
1134            } else {
1135                $user{$_} = [ $value ];
1136            }
1137        } elsif (!defined $user{$_}) {
1138            $user{$_} = $value;
1139        }
1140    }
1141}
1142
1143if (grep { /-rpath\b/ } ($user{LDFLAGS} ? @{$user{LDFLAGS}} : ())
1144    && !$disabled{shared}
1145    && !($disabled{asan} && $disabled{msan} && $disabled{ubsan})) {
1146    die "***** Cannot simultaneously use -rpath, shared libraries, and\n",
1147        "***** any of asan, msan or ubsan\n";
1148}
1149
1150# If no target was given, try guessing.
1151unless ($target) {
1152    my %system_config = OpenSSL::config::get_platform(%guess_opts, %user);
1153
1154    # The $system_config{disable} is used to populate %disabled with
1155    # entries that aren't already there.
1156    foreach ( @{$system_config{disable} // []} ) {
1157        $disabled{$_} = 'system' unless defined $disabled{$_};
1158    }
1159    delete $system_config{disable};
1160
1161    # Override config entries with stuff from the guesser.
1162    # It's assumed that this really is nothing new.
1163    %config = ( %config, %system_config );
1164    $target = $system_config{target};
1165}
1166
1167sub disable {
1168    my $disable_type = shift;
1169
1170    for (@_) {
1171        $disabled{$_} = $disable_type;
1172    }
1173
1174    my @tocheckfor = (@_ ? @_ : keys %disabled);
1175    while (@tocheckfor) {
1176        my %new_tocheckfor = ();
1177        my @cascade_copy = (@disable_cascades);
1178        while (@cascade_copy) {
1179            my ($test, $descendents) =
1180                (shift @cascade_copy, shift @cascade_copy);
1181            if (ref($test) eq "CODE" ? $test->() : defined($disabled{$test})) {
1182                foreach (grep { !defined($disabled{$_}) } @$descendents) {
1183                    $new_tocheckfor{$_} = 1; $disabled{$_} = "cascade";
1184                }
1185            }
1186        }
1187        @tocheckfor = (keys %new_tocheckfor);
1188    }
1189}
1190disable();                     # First cascade run
1191
1192our $die = sub { die @_; };
1193if ($target eq "TABLE") {
1194    local $die = sub { warn @_; };
1195    foreach (sort keys %table) {
1196        print_table_entry($_, "TABLE");
1197    }
1198    exit 0;
1199}
1200
1201if ($target eq "LIST") {
1202    foreach (sort keys %table) {
1203        print $_,"\n" unless $table{$_}->{template};
1204    }
1205    exit 0;
1206}
1207
1208if ($target eq "HASH") {
1209    local $die = sub { warn @_; };
1210    print "%table = (\n";
1211    foreach (sort keys %table) {
1212        print_table_entry($_, "HASH");
1213    }
1214    exit 0;
1215}
1216
1217print "Configuring OpenSSL version $config{full_version} ";
1218print "for target $target\n";
1219
1220if (scalar(@seed_sources) == 0) {
1221    print "Using os-specific seed configuration\n";
1222    push @seed_sources, 'os';
1223}
1224if (scalar(grep { $_ eq 'egd' } @seed_sources) > 0) {
1225    delete $disabled{'egd'};
1226}
1227if (scalar(grep { $_ eq 'none' } @seed_sources) > 0) {
1228    die "Cannot seed with none and anything else" if scalar(@seed_sources) > 1;
1229    warn <<_____ if scalar(@seed_sources) == 1;
1230
1231============================== WARNING ===============================
1232You have selected the --with-rand-seed=none option, which effectively
1233disables automatic reseeding of the OpenSSL random generator.
1234All operations depending on the random generator such as creating keys
1235will not work unless the random generator is seeded manually by the
1236application.
1237
1238Please read the 'Note on random number generation' section in the
1239INSTALL.md instructions and the RAND_DRBG(7) manual page for more
1240details.
1241============================== WARNING ===============================
1242
1243_____
1244}
1245push @{$config{openssl_feature_defines}},
1246     map { (my $x = $_) =~ tr|[\-a-z]|[_A-Z]|; "OPENSSL_RAND_SEED_$x" }
1247        @seed_sources;
1248
1249# Backward compatibility?
1250if ($target =~ m/^CygWin32(-.*)$/) {
1251    $target = "Cygwin".$1;
1252}
1253
1254# Support for legacy targets having a name starting with 'debug-'
1255my ($d, $t) = $target =~ m/^(debug-)?(.*)$/;
1256if ($d) {
1257    $config{build_type} = "debug";
1258
1259    # If we do not find debug-foo in the table, the target is set to foo.
1260    if (!$table{$target}) {
1261        $target = $t;
1262    }
1263}
1264
1265if ($target) {
1266    # It's possible that we have different config targets for specific
1267    # toolchains, so we try to detect them, and go for the plain config
1268    # target if not.
1269    my $found;
1270    foreach ( ( "$target-$user{CC}", "$target", undef ) ) {
1271        $found=$_ if $table{$_} && !$table{$_}->{template};
1272        last if $found;
1273    }
1274    $target = $found;
1275} else {
1276    # If we don't have a config target now, we try the C compiler as we
1277    # fallback
1278    my $cc = $user{CC} // 'cc';
1279    $target = $cc if $table{$cc} && !$table{$cc}->{template};
1280}
1281
1282&usage unless $target;
1283
1284exit 0 if $dryrun;              # From older 'config'
1285
1286$config{target} = $target;
1287my %target = resolve_config($target);
1288
1289foreach (keys %target_attr_translate) {
1290    $target{$target_attr_translate{$_}} = $target{$_}
1291        if $target{$_};
1292    delete $target{$_};
1293}
1294
1295%target = ( %{$table{DEFAULTS}}, %target );
1296
1297my %conf_files = map { $_ => 1 } (@{$target{_conf_fname_int}});
1298$config{conf_files} = [ sort keys %conf_files ];
1299
1300# Using sub disable within these loops may prove fragile, so we run
1301# a cascade afterwards
1302foreach my $feature (@{$target{disable}}) {
1303    if (exists $deprecated_disablables{$feature}) {
1304        warn "***** config $target disables deprecated feature $feature\n";
1305    } elsif (!grep { $feature eq $_ } @disablables) {
1306        die "***** config $target disables unknown feature $feature\n";
1307    }
1308    $disabled{$feature} = 'config';
1309}
1310foreach my $feature (@{$target{enable}}) {
1311    if ("default" eq ($disabled{$feature} // "")) {
1312        if (exists $deprecated_disablables{$feature}) {
1313            warn "***** config $target enables deprecated feature $feature\n";
1314        } elsif (!grep { $feature eq $_ } @disablables) {
1315            die "***** config $target enables unknown feature $feature\n";
1316        }
1317        delete $disabled{$feature};
1318    }
1319}
1320
1321# If uplink_arch isn't defined, disable uplink
1322$disabled{uplink} = 'no uplink_arch' unless (defined $target{uplink_arch});
1323# If asm_arch isn't defined, disable asm
1324$disabled{asm} = 'no asm_arch' unless (defined $target{asm_arch});
1325
1326disable();                      # Run a cascade now
1327
1328$target{CXXFLAGS}//=$target{CFLAGS} if $target{CXX};
1329$target{cxxflags}//=$target{cflags} if $target{CXX};
1330$target{exe_extension}=".exe" if ($config{target} eq "DJGPP");
1331$target{exe_extension}=".pm"  if ($config{target} =~ /vos/);
1332
1333# Fill %config with values from %user, and in case those are undefined or
1334# empty, use values from %target (acting as a default).
1335foreach (keys %user) {
1336    my $ref_type = ref $user{$_};
1337
1338    # Temporary function.  Takes an intended ref type (empty string or "ARRAY")
1339    # and a value that's to be coerced into that type.
1340    my $mkvalue = sub {
1341        my $type = shift;
1342        my $value = shift;
1343        my $undef_p = shift;
1344
1345        die "Too many arguments for \$mkvalue" if @_;
1346
1347        while (ref $value eq 'CODE') {
1348            $value = $value->();
1349        }
1350
1351        if ($type eq 'ARRAY') {
1352            return undef unless defined $value;
1353            return undef if ref $value ne 'ARRAY' && !$value;
1354            return undef if ref $value eq 'ARRAY' && !@$value;
1355            return [ $value ] unless ref $value eq 'ARRAY';
1356        }
1357        return undef unless $value;
1358        return $value;
1359    };
1360
1361    $config{$_} =
1362        $mkvalue->($ref_type, $user{$_})
1363        || $mkvalue->($ref_type, $target{$_});
1364    delete $config{$_} unless defined $config{$_};
1365}
1366
1367# Finish up %config by appending things the user gave us on the command line
1368# apart from "make variables"
1369foreach (keys %useradd) {
1370    # The must all be lists, so we assert that here
1371    die "internal error: \$useradd{$_} isn't an ARRAY\n"
1372        unless ref $useradd{$_} eq 'ARRAY';
1373
1374    if (defined $config{$_}) {
1375        push @{$config{$_}}, @{$useradd{$_}};
1376    } else {
1377        $config{$_} = [ @{$useradd{$_}} ];
1378    }
1379}
1380# At this point, we can forget everything about %user and %useradd,
1381# because it's now all been merged into the corresponding $config entry
1382
1383if (grep { $_ =~ /(?:^|\s)-static(?:\s|$)/ } @{$config{LDFLAGS}}) {
1384    disable('static', 'pic', 'threads');
1385}
1386
1387# Allow overriding the build file name
1388$config{build_file} = env('BUILDFILE') || $target{build_file} || "Makefile";
1389
1390# Make sure build_scheme is consistent.
1391$target{build_scheme} = [ $target{build_scheme} ]
1392    if ref($target{build_scheme}) ne "ARRAY";
1393
1394my ($builder, $builder_platform, @builder_opts) =
1395    @{$target{build_scheme}};
1396
1397foreach my $checker (($builder_platform."-".$target{build_file}."-checker.pm",
1398                      $builder_platform."-checker.pm")) {
1399    my $checker_path = catfile($srcdir, "Configurations", $checker);
1400    if (-f $checker_path) {
1401        my $fn = $ENV{CONFIGURE_CHECKER_WARN}
1402            ? sub { warn $@; } : sub { die $@; };
1403        if (! do $checker_path) {
1404            if ($@) {
1405                $fn->($@);
1406            } elsif ($!) {
1407                $fn->($!);
1408            } else {
1409                $fn->("The detected tools didn't match the platform\n");
1410            }
1411        }
1412        last;
1413    }
1414}
1415
1416push @{$config{defines}}, "NDEBUG"    if $config{build_type} eq "release";
1417
1418if ($target =~ /^mingw/ && `$config{CC} --target-help 2>&1` =~ m/-mno-cygwin/m)
1419        {
1420        push @{$config{cflags}}, "-mno-cygwin";
1421        push @{$config{cxxflags}}, "-mno-cygwin" if $config{CXX};
1422        push @{$config{shared_ldflag}}, "-mno-cygwin";
1423        }
1424
1425if ($target =~ /linux.*-mips/ && !$disabled{asm}
1426        && !grep { $_ !~ /-m(ips|arch=)/ } (@{$config{CFLAGS}})) {
1427        # minimally required architecture flags for assembly modules
1428        my $value;
1429        $value = '-mips2' if ($target =~ /mips32/);
1430        $value = '-mips3' if ($target =~ /mips64/);
1431        unshift @{$config{cflags}}, $value;
1432        unshift @{$config{cxxflags}}, $value if $config{CXX};
1433}
1434
1435# If threads aren't disabled, check how possible they are
1436unless ($disabled{threads}) {
1437    if ($auto_threads) {
1438        # Enabled by default, disable it forcibly if unavailable
1439        if ($target{thread_scheme} eq "(unknown)") {
1440            disable("unavailable", 'threads');
1441        }
1442    } else {
1443        # The user chose to enable threads explicitly, let's see
1444        # if there's a chance that's possible
1445        if ($target{thread_scheme} eq "(unknown)") {
1446            # If the user asked for "threads" and we don't have internal
1447            # knowledge how to do it, [s]he is expected to provide any
1448            # system-dependent compiler options that are necessary.  We
1449            # can't truly check that the given options are correct, but
1450            # we expect the user to know what [s]He is doing.
1451            if (!@{$config{CFLAGS}} && !@{$config{CPPDEFINES}}) {
1452                die "You asked for multi-threading support, but didn't\n"
1453                    ,"provide any system-specific compiler options\n";
1454            }
1455        }
1456    }
1457}
1458
1459# Find out if clang's sanitizers have been enabled with -fsanitize
1460# flags and ensure that the corresponding %disabled elements area
1461# removed to reflect that the sanitizers are indeed enabled.
1462my %detected_sanitizers = ();
1463foreach (grep /^-fsanitize=/, @{$config{CFLAGS} || []}) {
1464    (my $checks = $_) =~ s/^-fsanitize=//;
1465    foreach (split /,/, $checks) {
1466        my $d = { address       => 'asan',
1467                  undefined     => 'ubsan',
1468                  memory        => 'msan' } -> {$_};
1469        next unless defined $d;
1470
1471        $detected_sanitizers{$d} = 1;
1472        if (defined $disabled{$d}) {
1473            die "***** Conflict between disabling $d and enabling $_ sanitizer"
1474                if $disabled{$d} ne "default";
1475            delete $disabled{$d};
1476        }
1477    }
1478}
1479
1480# If threads still aren't disabled, add a C macro to ensure the source
1481# code knows about it.  Any other flag is taken care of by the configs.
1482unless($disabled{threads}) {
1483    push @{$config{openssl_feature_defines}}, "OPENSSL_THREADS";
1484}
1485
1486my $no_shared_warn=0;
1487if (($target{shared_target} // '') eq "")
1488        {
1489        $no_shared_warn = 1
1490            if (!$disabled{shared} || !$disabled{"dynamic-engine"});
1491        disable('no-shared-target', 'pic');
1492        }
1493
1494if ($disabled{"dynamic-engine"}) {
1495        $config{dynamic_engines} = 0;
1496} else {
1497        $config{dynamic_engines} = 1;
1498}
1499
1500unless ($disabled{asan} || defined $detected_sanitizers{asan}) {
1501    push @{$config{cflags}}, "-fsanitize=address";
1502}
1503
1504unless ($disabled{ubsan} || defined $detected_sanitizers{ubsan}) {
1505    # -DPEDANTIC or -fnosanitize=alignment may also be required on some
1506    # platforms.
1507    push @{$config{cflags}}, "-fsanitize=undefined", "-fno-sanitize-recover=all";
1508}
1509
1510unless ($disabled{msan} || defined $detected_sanitizers{msan}) {
1511  push @{$config{cflags}}, "-fsanitize=memory";
1512}
1513
1514unless ($disabled{"fuzz-libfuzzer"} && $disabled{"fuzz-afl"}
1515        && $disabled{asan} && $disabled{ubsan} && $disabled{msan}) {
1516    push @{$config{cflags}}, "-fno-omit-frame-pointer", "-g";
1517    push @{$config{cxxflags}}, "-fno-omit-frame-pointer", "-g" if $config{CXX};
1518}
1519#
1520# Platform fix-ups
1521#
1522
1523# This saves the build files from having to check
1524if ($disabled{pic})
1525        {
1526        foreach (qw(shared_cflag shared_cxxflag shared_cppflag
1527                    shared_defines shared_includes shared_ldflag
1528                    module_cflags module_cxxflags module_cppflags
1529                    module_defines module_includes module_lflags))
1530                {
1531                delete $config{$_};
1532                $target{$_} = "";
1533                }
1534        }
1535else
1536        {
1537        push @{$config{lib_defines}}, "OPENSSL_PIC";
1538        }
1539
1540if ($target{sys_id} ne "")
1541        {
1542        push @{$config{openssl_sys_defines}}, "OPENSSL_SYS_$target{sys_id}";
1543        }
1544
1545my %predefined_C = compiler_predefined($config{CROSS_COMPILE}.$config{CC});
1546my %predefined_CXX = $config{CXX}
1547    ? compiler_predefined($config{CROSS_COMPILE}.$config{CXX})
1548    : ();
1549
1550unless ($disabled{asm}) {
1551    # big endian systems can use ELFv2 ABI
1552    if ($target eq "linux-ppc64") {
1553        $target{perlasm_scheme} = "linux64v2" if ($predefined_C{_CALL_ELF} == 2);
1554    }
1555}
1556
1557# Check for makedepend capabilities.
1558if (!$disabled{makedepend}) {
1559    # If the attribute makedep_scheme is defined, then we assume that the
1560    # config target and its associated build file are programmed to deal
1561    # with it.
1562    # If makedep_scheme is undefined, we go looking for GCC compatible
1563    # dependency making, and if that's not available, we try to fall back
1564    # on 'makedepend'.
1565    if ($target{makedep_scheme}) {
1566        $config{makedep_scheme} = $target{makedep_scheme};
1567        # If the makedepcmd attribute is defined, copy it.  If not, the
1568        # build files will have to fend for themselves.
1569        $config{makedepcmd} = $target{makedepcmd} if $target{makedepcmd};
1570    } elsif (($predefined_C{__GNUC__} // -1) >= 3
1571             && !($predefined_C{__APPLE_CC__} && !$predefined_C{__clang__})) {
1572        # We know that GNU C version 3 and up as well as all clang
1573        # versions support dependency generation, but Xcode did not
1574        # handle $cc -M before clang support (but claims __GNUC__ = 3)
1575        $config{makedep_scheme} = 'gcc';
1576    } else {
1577        # In all other cases, we look for 'makedepend', and set the
1578        # makedep_scheme value if we found it.
1579        $config{makedepcmd} = which('makedepend');
1580        $config{makedep_scheme} = 'makedepend' if $config{makedepcmd};
1581    }
1582
1583    # If no depend scheme is set, we disable makedepend
1584    disable('unavailable', 'makedepend') unless $config{makedep_scheme};
1585}
1586
1587if (!$disabled{asm} && !$predefined_C{__MACH__} && $^O ne 'VMS') {
1588    # probe for -Wa,--noexecstack option...
1589    if ($predefined_C{__clang__}) {
1590        # clang has builtin assembler, which doesn't recognize --help,
1591        # but it apparently recognizes the option in question on all
1592        # supported platforms even when it's meaningless. In other words
1593        # probe would fail, but probed option always accepted...
1594        push @{$config{cflags}}, "-Wa,--noexecstack", "-Qunused-arguments";
1595    } else {
1596        my $cc = $config{CROSS_COMPILE}.$config{CC};
1597        open(PIPE, "$cc -Wa,--help -c -o null.$$.o -x assembler /dev/null 2>&1 |");
1598        while(<PIPE>) {
1599            if (m/--noexecstack/) {
1600                push @{$config{cflags}}, "-Wa,--noexecstack";
1601                last;
1602            }
1603        }
1604        close(PIPE);
1605        unlink("null.$$.o");
1606    }
1607}
1608
1609# Deal with bn_ops ###################################################
1610
1611$config{bn_ll}                  =0;
1612my $def_int="unsigned int";
1613$config{rc4_int}                =$def_int;
1614($config{b64l},$config{b64},$config{b32})=(0,0,1);
1615
1616my $count = 0;
1617foreach (sort split(/\s+/,$target{bn_ops})) {
1618    $count++ if /SIXTY_FOUR_BIT|SIXTY_FOUR_BIT_LONG|THIRTY_TWO_BIT/;
1619    $config{bn_ll}=1                            if $_ eq 'BN_LLONG';
1620    $config{rc4_int}="unsigned char"            if $_ eq 'RC4_CHAR';
1621    ($config{b64l},$config{b64},$config{b32})
1622        =(0,1,0)                                if $_ eq 'SIXTY_FOUR_BIT';
1623    ($config{b64l},$config{b64},$config{b32})
1624        =(1,0,0)                                if $_ eq 'SIXTY_FOUR_BIT_LONG';
1625    ($config{b64l},$config{b64},$config{b32})
1626        =(0,0,1)                                if $_ eq 'THIRTY_TWO_BIT';
1627}
1628die "Exactly one of SIXTY_FOUR_BIT|SIXTY_FOUR_BIT_LONG|THIRTY_TWO_BIT can be set in bn_ops\n"
1629    if $count > 1;
1630
1631$config{api} = $config{major} * 10000 + $config{minor} * 100
1632    unless $config{api};
1633foreach (keys %$apitable) {
1634    $disabled{"deprecated-$_"} = "deprecation"
1635        if $disabled{deprecated} && $config{api} >= $apitable->{$_};
1636}
1637
1638disable();                      # Run a cascade now
1639
1640# Hack cflags for better warnings (dev option) #######################
1641
1642# "Stringify" the C and C++ flags string.  This permits it to be made part of
1643# a string and works as well on command lines.
1644$config{cflags} = [ map { (my $x = $_) =~ s/([\\\"])/\\$1/g; $x }
1645                        @{$config{cflags}} ];
1646$config{cxxflags} = [ map { (my $x = $_) =~ s/([\\\"])/\\$1/g; $x }
1647                          @{$config{cxxflags}} ] if $config{CXX};
1648
1649$config{openssl_api_defines} = [
1650    "OPENSSL_CONFIGURED_API=".$config{api},
1651];
1652
1653my @strict_warnings_collection=();
1654if ($strict_warnings)
1655        {
1656        my $wopt;
1657        my $gccver = $predefined_C{__GNUC__} // -1;
1658
1659        if ($gccver >= 4)
1660                {
1661                push @strict_warnings_collection, @gcc_devteam_warn;
1662                push @strict_warnings_collection, @clang_devteam_warn
1663                    if (defined($predefined_C{__clang__}));
1664                }
1665        elsif ($config{target} =~ /^VC-/)
1666                {
1667                push @strict_warnings_collection, @cl_devteam_warn;
1668                }
1669        else
1670                {
1671                warn "WARNING --strict-warnings requires gcc[>=4] or gcc-alike, or MSVC"
1672                }
1673        }
1674
1675$config{CFLAGS} = [ map { $_ eq '--ossl-strict-warnings'
1676                              ? @strict_warnings_collection
1677                              : ( $_ ) }
1678                    @{$config{CFLAGS}} ];
1679
1680unless ($disabled{afalgeng}) {
1681    $config{afalgeng}="";
1682    if (grep { $_ eq 'afalgeng' } @{$target{enable}}) {
1683        my $minver = 4*10000 + 1*100 + 0;
1684        if ($config{CROSS_COMPILE} eq "") {
1685            my $verstr = `uname -r`;
1686            my ($ma, $mi1, $mi2) = split("\\.", $verstr);
1687            ($mi2) = $mi2 =~ /(\d+)/;
1688            my $ver = $ma*10000 + $mi1*100 + $mi2;
1689            if ($ver < $minver) {
1690                disable('too-old-kernel', 'afalgeng');
1691            } else {
1692                push @{$config{engdirs}}, "afalg";
1693            }
1694        } else {
1695            disable('cross-compiling', 'afalgeng');
1696        }
1697    } else {
1698        disable('not-linux', 'afalgeng');
1699    }
1700}
1701
1702unless ($disabled{devcryptoeng}) {
1703    if ($target =~ m/^BSD/) {
1704        my $maxver = 5*100 + 7;
1705        my $sysstr = `uname -s`;
1706        my $verstr = `uname -r`;
1707        $sysstr =~ s|\R$||;
1708        $verstr =~ s|\R$||;
1709        my ($ma, $mi, @rest) = split m|\.|, $verstr;
1710        my $ver = $ma*100 + $mi;
1711        if ($sysstr eq 'OpenBSD' && $ver >= $maxver) {
1712            disable('too-new-kernel', 'devcryptoeng');
1713        }
1714    }
1715}
1716
1717unless ($disabled{ktls}) {
1718    $config{ktls}="";
1719    if ($target =~ m/^linux/) {
1720        my $usr = "/usr/$config{cross_compile_prefix}";
1721        chop($usr);
1722        if ($config{cross_compile_prefix} eq "") {
1723            $usr = "/usr";
1724        }
1725        my $minver = (4 << 16) + (13 << 8) + 0;
1726        my @verstr = split(" ",`cat $usr/include/linux/version.h | grep LINUX_VERSION_CODE`);
1727
1728        if ($verstr[2] < $minver) {
1729            disable('too-old-kernel', 'ktls');
1730        }
1731    } elsif ($target =~ m/^BSD/) {
1732        my $cc = $config{CROSS_COMPILE}.$config{CC};
1733        system("printf '#include <sys/types.h>\n#include <sys/ktls.h>' | $cc -E - >/dev/null 2>&1");
1734        if ($? != 0) {
1735            disable('too-old-freebsd', 'ktls');
1736        }
1737    } else {
1738        disable('not-linux-or-freebsd', 'ktls');
1739    }
1740}
1741
1742push @{$config{openssl_other_defines}}, "OPENSSL_NO_KTLS" if ($disabled{ktls});
1743
1744# Get the extra flags used when building shared libraries and modules.  We
1745# do this late because some of them depend on %disabled.
1746
1747# Make the flags to build DSOs the same as for shared libraries unless they
1748# are already defined
1749$target{module_cflags} = $target{shared_cflag} unless defined $target{module_cflags};
1750$target{module_cxxflags} = $target{shared_cxxflag} unless defined $target{module_cxxflags};
1751$target{module_ldflags} = $target{shared_ldflag} unless defined $target{module_ldflags};
1752{
1753    my $shared_info_pl =
1754        catfile(dirname($0), "Configurations", "shared-info.pl");
1755    my %shared_info = read_eval_file($shared_info_pl);
1756    push @{$target{_conf_fname_int}}, $shared_info_pl;
1757    my $si = $target{shared_target};
1758    while (ref $si ne "HASH") {
1759        last if ! defined $si;
1760        if (ref $si eq "CODE") {
1761            $si = $si->();
1762        } else {
1763            $si = $shared_info{$si};
1764        }
1765    }
1766
1767    # Some of the 'shared_target' values don't have any entries in
1768    # %shared_info.  That's perfectly fine, AS LONG AS the build file
1769    # template knows how to handle this.  That is currently the case for
1770    # Windows and VMS.
1771    if (defined $si) {
1772        # Just as above, copy certain shared_* attributes to the corresponding
1773        # module_ attribute unless the latter is already defined
1774        $si->{module_cflags} = $si->{shared_cflag} unless defined $si->{module_cflags};
1775        $si->{module_cxxflags} = $si->{shared_cxxflag} unless defined $si->{module_cxxflags};
1776        $si->{module_ldflags} = $si->{shared_ldflag} unless defined $si->{module_ldflags};
1777        foreach (sort keys %$si) {
1778            $target{$_} = defined $target{$_}
1779                ? add($si->{$_})->($target{$_})
1780                : $si->{$_};
1781        }
1782    }
1783}
1784
1785# ALL MODIFICATIONS TO %disabled, %config and %target MUST BE DONE FROM HERE ON
1786
1787######################################################################
1788# Build up information for skipping certain directories depending on disabled
1789# features, as well as setting up macros for disabled features.
1790
1791# This is a tentative database of directories to skip.  Some entries may not
1792# correspond to anything real, but that's ok, they will simply be ignored.
1793# The actual processing of these entries is done in the build.info lookup
1794# loop further down.
1795#
1796# The key is a Unix formatted path in the source tree, the value is an index
1797# into %disabled_info, so any existing path gets added to a corresponding
1798# 'skipped' entry in there with the list of skipped directories.
1799my %skipdir = ();
1800my %disabled_info = ();         # For configdata.pm
1801foreach my $what (sort keys %disabled) {
1802    # There are deprecated disablables that translate to themselves.
1803    # They cause disabling cascades, but should otherwise not regiter.
1804    next if $deprecated_disablables{$what};
1805    # The generated $disabled{"deprecated-x.y"} entries are special
1806    # and treated properly elsewhere
1807    next if $what =~ m|^deprecated-|;
1808
1809    $config{options} .= " no-$what";
1810
1811    if (!grep { $what eq $_ } ( 'buildtest-c++', 'fips', 'threads', 'shared',
1812                                'module', 'pic', 'dynamic-engine', 'makedepend',
1813                                'zlib-dynamic', 'zlib', 'sse2', 'legacy' )) {
1814        (my $WHAT = uc $what) =~ s|-|_|g;
1815        my $skipdir = $what;
1816
1817        # fix-up crypto/directory name(s)
1818        $skipdir = "ripemd" if $what eq "rmd160";
1819        $skipdir = "whrlpool" if $what eq "whirlpool";
1820
1821        my $macro = $disabled_info{$what}->{macro} = "OPENSSL_NO_$WHAT";
1822        push @{$config{openssl_feature_defines}}, $macro;
1823
1824        $skipdir{engines} = $what if $what eq 'engine';
1825        $skipdir{"crypto/$skipdir"} = $what
1826            unless $what eq 'async' || $what eq 'err' || $what eq 'dso';
1827    }
1828}
1829
1830if ($disabled{"dynamic-engine"}) {
1831    push @{$config{openssl_feature_defines}}, "OPENSSL_NO_DYNAMIC_ENGINE";
1832} else {
1833    push @{$config{openssl_feature_defines}}, "OPENSSL_NO_STATIC_ENGINE";
1834}
1835
1836# If we use the unified build, collect information from build.info files
1837my %unified_info = ();
1838
1839my $buildinfo_debug = defined($ENV{CONFIGURE_DEBUG_BUILDINFO});
1840if ($builder eq "unified") {
1841    use Text::Template 1.46;
1842
1843    sub cleandir {
1844        my $base = shift;
1845        my $dir = shift;
1846        my $relativeto = shift || ".";
1847
1848        $dir = catdir($base,$dir) unless isabsolute($dir);
1849
1850        # Make sure the directories we're building in exists
1851        mkpath($dir);
1852
1853        my $res = abs2rel(absolutedir($dir), rel2abs($relativeto));
1854        #print STDERR "DEBUG[cleandir]: $dir , $base => $res\n";
1855        return $res;
1856    }
1857
1858    sub cleanfile {
1859        my $base = shift;
1860        my $file = shift;
1861        my $relativeto = shift || ".";
1862
1863        $file = catfile($base,$file) unless isabsolute($file);
1864
1865        my $d = dirname($file);
1866        my $f = basename($file);
1867
1868        # Make sure the directories we're building in exists
1869        mkpath($d);
1870
1871        my $res = abs2rel(catfile(absolutedir($d), $f), rel2abs($relativeto));
1872        #print STDERR "DEBUG[cleanfile]: $d , $f => $res\n";
1873        return $res;
1874    }
1875
1876    # Store the name of the template file we will build the build file from
1877    # in %config.  This may be useful for the build file itself.
1878    my @build_file_template_names =
1879        ( $builder_platform."-".$target{build_file}.".tmpl",
1880          $target{build_file}.".tmpl" );
1881    my @build_file_templates = ();
1882
1883    # First, look in the user provided directory, if given
1884    if (defined env($local_config_envname)) {
1885        @build_file_templates =
1886            map {
1887                if ($^O eq 'VMS') {
1888                    # VMS environment variables are logical names,
1889                    # which can be used as is
1890                    $local_config_envname . ':' . $_;
1891                } else {
1892                    catfile(env($local_config_envname), $_);
1893                }
1894            }
1895            @build_file_template_names;
1896    }
1897    # Then, look in our standard directory
1898    push @build_file_templates,
1899        ( map { cleanfile($srcdir, catfile("Configurations", $_), $blddir) }
1900          @build_file_template_names );
1901
1902    my $build_file_template;
1903    for $_ (@build_file_templates) {
1904        $build_file_template = $_;
1905        last if -f $build_file_template;
1906
1907        $build_file_template = undef;
1908    }
1909    if (!defined $build_file_template) {
1910        die "*** Couldn't find any of:\n", join("\n", @build_file_templates), "\n";
1911    }
1912    $config{build_file_templates}
1913      = [ cleanfile($srcdir, catfile("Configurations", "common0.tmpl"),
1914                    $blddir),
1915           $build_file_template ];
1916
1917    my @build_dirs = ( [ ] );   # current directory
1918
1919    $config{build_infos} = [ ];
1920
1921    # We want to detect configdata.pm in the source tree, so we
1922    # don't use it if the build tree is different.
1923    my $src_configdata = cleanfile($srcdir, "configdata.pm", $blddir);
1924
1925    # Any source file that we recognise is placed in this hash table, with
1926    # the list of its intended destinations as value.  When everything has
1927    # been collected, there's a routine that checks that these source files
1928    # exist, or if they are generated, that the generator exists.
1929    my %check_exist = ();
1930    my %check_generate = ();
1931
1932    my %ordinals = ();
1933    while (@build_dirs) {
1934        my @curd = @{shift @build_dirs};
1935        my $sourced = catdir($srcdir, @curd);
1936        my $buildd = catdir($blddir, @curd);
1937
1938        my $unixdir = join('/', @curd);
1939        if (exists $skipdir{$unixdir}) {
1940            my $what = $skipdir{$unixdir};
1941            push @{$disabled_info{$what}->{skipped}}, catdir(@curd);
1942            next;
1943        }
1944
1945        mkpath($buildd);
1946
1947        my $f = 'build.info';
1948        # The basic things we're trying to build
1949        my @programs = ();
1950        my @libraries = ();
1951        my @modules = ();
1952        my @scripts = ();
1953
1954        my %sources = ();
1955        my %shared_sources = ();
1956        my %includes = ();
1957        my %defines = ();
1958        my %depends = ();
1959        my %generate = ();
1960        my %imagedocs = ();
1961        my %htmldocs = ();
1962        my %mandocs = ();
1963
1964        # Support for $variablename in build.info files.
1965        # Embedded perl code is the ultimate master, still.  If its output
1966        # contains a dollar sign, it had better be escaped, or it will be
1967        # taken for a variable name prefix.
1968        my %variables = ();
1969        # Variable name syntax
1970        my $variable_name_re = qr/(?P<VARIABLE>[[:alpha:]][[:alnum:]_]*)/;
1971        # Value modifier syntaxes
1972        my $variable_subst_re = qr/\/(?P<RE>(?:\\\/|.)*?)\/(?P<SUBST>.*?)/;
1973        # Variable reference
1974        my $variable_simple_re = qr/(?<!\\)\$${variable_name_re}/;
1975        my $variable_w_mod_re =
1976            qr/(?<!\\)\$\{${variable_name_re}(?P<MOD>(?:\\\/|.)*?)\}/;
1977        # Tie it all together
1978        my $variable_re = qr/${variable_simple_re}|${variable_w_mod_re}/;
1979
1980        my $expand_variables = sub {
1981            my $value = '';
1982            my $value_rest = shift;
1983
1984            if ($ENV{CONFIGURE_DEBUG_VARIABLE_EXPAND}) {
1985                print STDERR
1986                    "DEBUG[\$expand_variables] Parsed '$value_rest' ...\n"
1987            }
1988
1989            while ($value_rest =~ /${variable_re}/) {
1990                # We must save important regexp values, because the next
1991                # regexp clears them
1992                my $mod = $+{MOD};
1993                my $variable_value = $variables{$+{VARIABLE}};
1994
1995                $value_rest = $';
1996                $value .= $`;
1997
1998                # Process modifier expressions, if present
1999                if (defined $mod) {
2000                    if ($mod =~ /^${variable_subst_re}$/) {
2001                        my $re = $+{RE};
2002                        my $subst = $+{SUBST};
2003
2004                        $variable_value =~ s/\Q$re\E/$subst/g;
2005
2006                        if ($ENV{CONFIGURE_DEBUG_VARIABLE_EXPAND}) {
2007                            print STDERR
2008                                "DEBUG[\$expand_variables] ... and substituted ",
2009                                "'$re' with '$subst'\n";
2010                        }
2011                    }
2012                }
2013
2014                $value .= $variable_value;
2015            }
2016            if ($ENV{CONFIGURE_DEBUG_VARIABLE_EXPAND}) {
2017                print STDERR
2018                    "DEBUG[\$expand_variables] ... into: '$value$value_rest'\n";
2019            }
2020            return $value . $value_rest;
2021        };
2022
2023        # Support for attributes in build.info files
2024        my %attributes = ();
2025        my $handle_attributes = sub {
2026            my $attr_str = shift;
2027            my $ref = shift;
2028            my @goals = @_;
2029
2030            return unless defined $attr_str;
2031
2032            my @a = tokenize($attr_str, qr|\s*,\s*|);
2033            foreach my $a (@a) {
2034                my $ac = 1;
2035                my $ak = $a;
2036                my $av = 1;
2037                if ($a =~ m|^(!)?(.*?)\s* = \s*(.*?)$|x) {
2038                    $ac = ! $1;
2039                    $ak = $2;
2040                    $av = $3;
2041                }
2042                foreach my $g (@goals) {
2043                    if ($ac) {
2044                        $$ref->{$g}->{$ak} = $av;
2045                    } else {
2046                        delete $$ref->{$g}->{$ak};
2047                    }
2048                }
2049            }
2050        };
2051
2052        # Support for pushing values on multiple indexes of a given hash
2053        # array.
2054        my $push_to = sub {
2055            my $valueref = shift;
2056            my $index_str = shift; # May be undef or empty
2057            my $attrref = shift;   # May be undef
2058            my $attr_str = shift;
2059            my @values = @_;
2060
2061            if (defined $index_str) {
2062                my @indexes = ( '' );
2063                if ($index_str !~ m|^\s*$|) {
2064                    @indexes = tokenize($index_str);
2065                }
2066                foreach (@indexes) {
2067                    push @{$valueref->{$_}}, @values;
2068                    if (defined $attrref) {
2069                        $handle_attributes->($attr_str, \$$attrref->{$_},
2070                                             @values);
2071                    }
2072                }
2073            } else {
2074                push @$valueref, @values;
2075                $handle_attributes->($attr_str, $attrref, @values)
2076                    if defined $attrref;
2077            }
2078        };
2079
2080        if ($buildinfo_debug) {
2081            print STDERR "DEBUG: Reading ",catfile($sourced, $f),"\n";
2082        }
2083        push @{$config{build_infos}}, catfile(abs2rel($sourced, $blddir), $f);
2084        my $template =
2085            Text::Template->new(TYPE => 'FILE',
2086                                SOURCE => catfile($sourced, $f),
2087                                PREPEND => qq{use lib "$FindBin::Bin/util/perl";});
2088        die "Something went wrong with $sourced/$f: $!\n" unless $template;
2089        my @text =
2090            split /^/m,
2091            $template->fill_in(HASH => { config => \%config,
2092                                         target => \%target,
2093                                         disabled => \%disabled,
2094                                         withargs => \%withargs,
2095                                         builddir => abs2rel($buildd, $blddir),
2096                                         sourcedir => abs2rel($sourced, $blddir),
2097                                         buildtop => abs2rel($blddir, $blddir),
2098                                         sourcetop => abs2rel($srcdir, $blddir) },
2099                               DELIMITERS => [ "{-", "-}" ]);
2100
2101        # The top item of this stack has the following values
2102        # -2 positive already run and we found ELSE (following ELSIF should fail)
2103        # -1 positive already run (skip until ENDIF)
2104        # 0 negatives so far (if we're at a condition, check it)
2105        # 1 last was positive (don't skip lines until next ELSE, ELSIF or ENDIF)
2106        # 2 positive ELSE (following ELSIF should fail)
2107        my @skip = ();
2108
2109        # A few useful generic regexps
2110        my $index_re = qr/\[\s*(?P<INDEX>(?:\\.|.)*?)\s*\]/;
2111        my $cond_re = qr/\[\s*(?P<COND>(?:\\.|.)*?)\s*\]/;
2112        my $attribs_re = qr/(?:\{\s*(?P<ATTRIBS>(?:\\.|.)*?)\s*\})?/;
2113        my $value_re = qr/(?P<VALUE>.*?)/;
2114        collect_information(
2115            collect_from_array([ @text ],
2116                               qr/\\$/ => sub { my $l1 = shift; my $l2 = shift;
2117                                                $l1 =~ s/\\$//; $l1.$l2 }),
2118            # Info we're looking for
2119            qr/^\s* IF ${cond_re} \s*$/x
2120            => sub {
2121                if (! @skip || $skip[$#skip] > 0) {
2122                    push @skip, !! $expand_variables->($+{COND});
2123                } else {
2124                    push @skip, -1;
2125                }
2126            },
2127            qr/^\s* ELSIF ${cond_re} \s*$/x
2128            => sub { die "ELSIF out of scope" if ! @skip;
2129                     die "ELSIF following ELSE" if abs($skip[$#skip]) == 2;
2130                     $skip[$#skip] = -1 if $skip[$#skip] != 0;
2131                     $skip[$#skip] = !! $expand_variables->($+{COND})
2132                         if $skip[$#skip] == 0; },
2133            qr/^\s* ELSE \s*$/x
2134            => sub { die "ELSE out of scope" if ! @skip;
2135                     $skip[$#skip] = -2 if $skip[$#skip] != 0;
2136                     $skip[$#skip] = 2 if $skip[$#skip] == 0; },
2137            qr/^\s* ENDIF \s*$/x
2138            => sub { die "ENDIF out of scope" if ! @skip;
2139                     pop @skip; },
2140            qr/^\s* ${variable_re} \s* = \s* ${value_re} \s* $/x
2141            => sub {
2142                if (!@skip || $skip[$#skip] > 0) {
2143                    $variables{$+{VARIABLE}} = $expand_variables->($+{VALUE});
2144                }
2145            },
2146            qr/^\s* SUBDIRS \s* = \s* ${value_re} \s* $/x
2147            => sub {
2148                if (!@skip || $skip[$#skip] > 0) {
2149                    foreach (tokenize($expand_variables->($+{VALUE}))) {
2150                        push @build_dirs, [ @curd, splitdir($_, 1) ];
2151                    }
2152                }
2153            },
2154            qr/^\s* PROGRAMS ${attribs_re} \s* =  \s* ${value_re} \s* $/x
2155            => sub { $push_to->(\@programs, undef,
2156                                \$attributes{programs}, $+{ATTRIBS},
2157                                tokenize($expand_variables->($+{VALUE})))
2158                         if !@skip || $skip[$#skip] > 0; },
2159            qr/^\s* LIBS ${attribs_re} \s* =  \s* ${value_re} \s* $/x
2160            => sub { $push_to->(\@libraries, undef,
2161                                \$attributes{libraries}, $+{ATTRIBS},
2162                                tokenize($expand_variables->($+{VALUE})))
2163                         if !@skip || $skip[$#skip] > 0; },
2164            qr/^\s* MODULES ${attribs_re} \s* =  \s* ${value_re} \s* $/x
2165            => sub { $push_to->(\@modules, undef,
2166                                \$attributes{modules}, $+{ATTRIBS},
2167                                tokenize($expand_variables->($+{VALUE})))
2168                         if !@skip || $skip[$#skip] > 0; },
2169            qr/^\s* SCRIPTS ${attribs_re} \s* = \s* ${value_re} \s* $/x
2170            => sub { $push_to->(\@scripts, undef,
2171                                \$attributes{scripts}, $+{ATTRIBS},
2172                                tokenize($expand_variables->($+{VALUE})))
2173                         if !@skip || $skip[$#skip] > 0; },
2174            qr/^\s* IMAGEDOCS ${index_re} \s* = \s* ${value_re} \s* $/x
2175            => sub { $push_to->(\%imagedocs, $expand_variables->($+{INDEX}),
2176                                undef, undef,
2177                                tokenize($expand_variables->($+{VALUE})))
2178                         if !@skip || $skip[$#skip] > 0; },
2179            qr/^\s* HTMLDOCS ${index_re} \s* = \s* ${value_re} \s* $/x
2180            => sub { $push_to->(\%htmldocs, $expand_variables->($+{INDEX}),
2181                                undef, undef,
2182                                tokenize($expand_variables->($+{VALUE})))
2183                         if !@skip || $skip[$#skip] > 0; },
2184            qr/^\s* MANDOCS ${index_re} \s* = \s* ${value_re} \s* $/x
2185            => sub { $push_to->(\%mandocs, $expand_variables->($+{INDEX}),
2186                                undef, undef,
2187                                tokenize($expand_variables->($+{VALUE})))
2188                         if !@skip || $skip[$#skip] > 0; },
2189            qr/^\s* SOURCE ${index_re} ${attribs_re} \s* = \s* ${value_re} \s* $/x
2190            => sub { $push_to->(\%sources, $expand_variables->($+{INDEX}),
2191                                \$attributes{sources}, $+{ATTRIBS},
2192                                tokenize($expand_variables->($+{VALUE})))
2193                         if !@skip || $skip[$#skip] > 0; },
2194            qr/^\s* SHARED_SOURCE ${index_re} ${attribs_re} \s* = \s* ${value_re} \s* $/x
2195            => sub { $push_to->(\%shared_sources, $expand_variables->($+{INDEX}),
2196                                \$attributes{sources}, $+{ATTRIBS},
2197                                tokenize($expand_variables->($+{VALUE})))
2198                         if !@skip || $skip[$#skip] > 0; },
2199            qr/^\s* INCLUDE ${index_re} \s* = \s* ${value_re} \s* $/x
2200            => sub { $push_to->(\%includes, $expand_variables->($+{INDEX}),
2201                                undef, undef,
2202                                tokenize($expand_variables->($+{VALUE})))
2203                         if !@skip || $skip[$#skip] > 0; },
2204            qr/^\s* DEFINE ${index_re} \s* = \s* ${value_re} \s* $/x
2205            => sub { $push_to->(\%defines, $expand_variables->($+{INDEX}),
2206                                undef, undef,
2207                                tokenize($expand_variables->($+{VALUE})))
2208                         if !@skip || $skip[$#skip] > 0; },
2209            qr/^\s* DEPEND ${index_re} ${attribs_re} \s* = \s* ${value_re} \s* $/x
2210            => sub { $push_to->(\%depends, $expand_variables->($+{INDEX}),
2211                                \$attributes{depends}, $+{ATTRIBS},
2212                                tokenize($expand_variables->($+{VALUE})))
2213                         if !@skip || $skip[$#skip] > 0; },
2214            qr/^\s* GENERATE ${index_re} \s* = \s* ${value_re} \s* $/x
2215            => sub { $push_to->(\%generate, $expand_variables->($+{INDEX}),
2216                                undef, undef, $expand_variables->($+{VALUE}))
2217                         if !@skip || $skip[$#skip] > 0; },
2218            qr/^\s* (?:\#.*)? $/x => sub { },
2219            "OTHERWISE" => sub { die "Something wrong with this line:\n$_\nat $sourced/$f" },
2220            "BEFORE" => sub {
2221                if ($buildinfo_debug) {
2222                    print STDERR "DEBUG: Parsing ",join(" ", @_),"\n";
2223                    print STDERR "DEBUG: ... before parsing, skip stack is ",join(" ", map { int($_) } @skip),"\n";
2224                }
2225            },
2226            "AFTER" => sub {
2227                if ($buildinfo_debug) {
2228                    print STDERR "DEBUG: .... after parsing, skip stack is ",join(" ", map { int($_) } @skip),"\n";
2229                }
2230            },
2231            );
2232        die "runaway IF?" if (@skip);
2233
2234        if (grep { defined $attributes{modules}->{$_}->{engine} } keys %attributes
2235                and !$config{dynamic_engines}) {
2236            die <<"EOF"
2237ENGINES can only be used if configured with 'dynamic-engine'.
2238This is usually a fault in a build.info file.
2239EOF
2240        }
2241
2242        {
2243            my %infos = ( programs  => [ @programs  ],
2244                          libraries => [ @libraries ],
2245                          modules   => [ @modules   ],
2246                          scripts   => [ @scripts   ] );
2247            foreach my $k (keys %infos) {
2248                foreach (@{$infos{$k}}) {
2249                    my $item = cleanfile($buildd, $_, $blddir);
2250                    $unified_info{$k}->{$item} = 1;
2251
2252                    # Fix up associated attributes
2253                    $unified_info{attributes}->{$k}->{$item} =
2254                        $attributes{$k}->{$_}
2255                        if defined $attributes{$k}->{$_};
2256                }
2257            }
2258        }
2259
2260        # Check that we haven't defined any library as both shared and
2261        # explicitly static.  That is forbidden.
2262        my @doubles = ();
2263        foreach (grep /\.a$/, keys %{$unified_info{libraries}}) {
2264            (my $l = $_) =~ s/\.a$//;
2265            push @doubles, $l if defined $unified_info{libraries}->{$l};
2266        }
2267        die "these libraries are both explicitly static and shared:\n  ",
2268            join(" ", @doubles), "\n"
2269            if @doubles;
2270
2271        foreach (keys %sources) {
2272            my $dest = $_;
2273            my $ddest = cleanfile($buildd, $_, $blddir);
2274            foreach (@{$sources{$dest}}) {
2275                my $s = cleanfile($sourced, $_, $blddir);
2276
2277                # If it's generated or we simply don't find it in the source
2278                # tree, we assume it's in the build tree.
2279                if ($s eq $src_configdata || $generate{$_} || ! -f $s) {
2280                    $s = cleanfile($buildd, $_, $blddir);
2281                }
2282                my $o = $_;
2283                # We recognise C++, C and asm files
2284                if ($s =~ /\.(cc|cpp|c|s|S)$/) {
2285                    push @{$check_exist{$s}}, $ddest;
2286                    $o =~ s/\.[csS]$/.o/; # C and assembler
2287                    $o =~ s/\.(cc|cpp)$/_cc.o/; # C++
2288                    $o = cleanfile($buildd, $o, $blddir);
2289                    $unified_info{sources}->{$ddest}->{$o} = -1;
2290                    $unified_info{sources}->{$o}->{$s} = -1;
2291                } elsif ($s =~ /\.rc$/) {
2292                    # We also recognise resource files
2293                    push @{$check_exist{$s}}, $ddest;
2294                    $o =~ s/\.rc$/.res/; # Resource configuration
2295                    $o = cleanfile($buildd, $o, $blddir);
2296                    $unified_info{sources}->{$ddest}->{$o} = -1;
2297                    $unified_info{sources}->{$o}->{$s} = -1;
2298                } else {
2299                    push @{$check_exist{$s}}, $ddest;
2300                    $unified_info{sources}->{$ddest}->{$s} = 1;
2301                }
2302                # Fix up associated attributes
2303                if ($o ne $_) {
2304                    $unified_info{attributes}->{sources}->{$ddest}->{$o} =
2305                        $unified_info{attributes}->{sources}->{$o}->{$s} =
2306                        $attributes{sources}->{$dest}->{$_}
2307                        if defined $attributes{sources}->{$dest}->{$_};
2308                } else {
2309                    $unified_info{attributes}->{sources}->{$ddest}->{$s} =
2310                        $attributes{sources}->{$dest}->{$_}
2311                        if defined $attributes{sources}->{$dest}->{$_};
2312                }
2313            }
2314        }
2315
2316        foreach (keys %shared_sources) {
2317            my $dest = $_;
2318            my $ddest = cleanfile($buildd, $_, $blddir);
2319            foreach (@{$shared_sources{$dest}}) {
2320                my $s = cleanfile($sourced, $_, $blddir);
2321
2322                # If it's generated or we simply don't find it in the source
2323                # tree, we assume it's in the build tree.
2324                if ($s eq $src_configdata || $generate{$_} || ! -f $s) {
2325                    $s = cleanfile($buildd, $_, $blddir);
2326                }
2327
2328                my $o = $_;
2329                if ($s =~ /\.(cc|cpp|c|s|S)$/) {
2330                    # We recognise C++, C and asm files
2331                    push @{$check_exist{$s}}, $ddest;
2332                    $o =~ s/\.[csS]$/.o/; # C and assembler
2333                    $o =~ s/\.(cc|cpp)$/_cc.o/; # C++
2334                    $o = cleanfile($buildd, $o, $blddir);
2335                    $unified_info{shared_sources}->{$ddest}->{$o} = -1;
2336                    $unified_info{sources}->{$o}->{$s} = -1;
2337                } elsif ($s =~ /\.rc$/) {
2338                    # We also recognise resource files
2339                    push @{$check_exist{$s}}, $ddest;
2340                    $o =~ s/\.rc$/.res/; # Resource configuration
2341                    $o = cleanfile($buildd, $o, $blddir);
2342                    $unified_info{shared_sources}->{$ddest}->{$o} = -1;
2343                    $unified_info{sources}->{$o}->{$s} = -1;
2344                } elsif ($s =~ /\.ld$/) {
2345                    # We also recognise linker scripts (or corresponding)
2346                    # We know they are generated files
2347                    push @{$check_exist{$s}}, $ddest;
2348                    $o = cleanfile($buildd, $_, $blddir);
2349                    $unified_info{shared_sources}->{$ddest}->{$o} = 1;
2350                } else {
2351                    die "unrecognised source file type for shared library: $s\n";
2352                }
2353                # Fix up associated attributes
2354                if ($o ne $_) {
2355                    $unified_info{attributes}->{shared_sources}->{$ddest}->{$o} =
2356                        $unified_info{attributes}->{sources}->{$o}->{$s} =
2357                        $attributes{sources}->{$dest}->{$_}
2358                        if defined $attributes{sources}->{$dest}->{$_};
2359                } else {
2360                    $unified_info{attributes}->{shared_sources}->{$ddest}->{$o} =
2361                        $attributes{sources}->{$dest}->{$_}
2362                        if defined $attributes{sources}->{$dest}->{$_};
2363                }
2364            }
2365        }
2366
2367        foreach (keys %generate) {
2368            my $dest = $_;
2369            my $ddest = cleanfile($buildd, $_, $blddir);
2370            die "more than one generator for $dest: "
2371                ,join(" ", @{$generate{$_}}),"\n"
2372                if scalar @{$generate{$_}} > 1;
2373            my @generator = split /\s+/, $generate{$dest}->[0];
2374            my $gen = $generator[0];
2375            $generator[0] = cleanfile($sourced, $gen, $blddir);
2376
2377            # If the generator is itself generated, it's in the build tree
2378            if ($generate{$gen} || ! -f $generator[0]) {
2379                $generator[0] = cleanfile($buildd, $gen, $blddir);
2380            }
2381            $check_generate{$ddest}->{$generator[0]}++;
2382
2383            $unified_info{generate}->{$ddest} = [ @generator ];
2384        }
2385
2386        foreach (keys %depends) {
2387            my $dest = $_;
2388            my $ddest = $dest;
2389
2390            if ($dest =~ /^\|(.*)\|$/) {
2391                # Collect the raw target
2392                $unified_info{targets}->{$1} = 1;
2393                $ddest = $1;
2394            } elsif ($dest eq '') {
2395                $ddest = '';
2396            } else {
2397                $ddest = cleanfile($sourced, $_, $blddir);
2398
2399                # If the destination doesn't exist in source, it can only be
2400                # a generated file in the build tree.
2401                if ($ddest eq $src_configdata || ! -f $ddest) {
2402                    $ddest = cleanfile($buildd, $_, $blddir);
2403                }
2404            }
2405            foreach (@{$depends{$dest}}) {
2406                my $d = cleanfile($sourced, $_, $blddir);
2407                my $d2 = cleanfile($buildd, $_, $blddir);
2408
2409                # If we know it's generated, or assume it is because we can't
2410                # find it in the source tree, we set file we depend on to be
2411                # in the build tree rather than the source tree.
2412                if ($d eq $src_configdata
2413                    || (grep { $d2 eq $_ }
2414                        keys %{$unified_info{generate}})
2415                    || ! -f $d) {
2416                    $d = $d2;
2417                }
2418                $unified_info{depends}->{$ddest}->{$d} = 1;
2419
2420                # Fix up associated attributes
2421                $unified_info{attributes}->{depends}->{$ddest}->{$d} =
2422                    $attributes{depends}->{$dest}->{$_}
2423                    if defined $attributes{depends}->{$dest}->{$_};
2424            }
2425        }
2426
2427        foreach (keys %includes) {
2428            my $dest = $_;
2429            my $ddest = cleanfile($sourced, $_, $blddir);
2430
2431            # If the destination doesn't exist in source, it can only be
2432            # a generated file in the build tree.
2433            if ($ddest eq $src_configdata || ! -f $ddest) {
2434                $ddest = cleanfile($buildd, $_, $blddir);
2435            }
2436            foreach (@{$includes{$dest}}) {
2437                my $is = cleandir($sourced, $_, $blddir);
2438                my $ib = cleandir($buildd, $_, $blddir);
2439                push @{$unified_info{includes}->{$ddest}->{source}}, $is
2440                    unless grep { $_ eq $is } @{$unified_info{includes}->{$ddest}->{source}};
2441                push @{$unified_info{includes}->{$ddest}->{build}}, $ib
2442                    unless grep { $_ eq $ib } @{$unified_info{includes}->{$ddest}->{build}};
2443            }
2444        }
2445
2446        foreach my $dest (keys %defines) {
2447            my $ddest;
2448
2449            if ($dest ne "") {
2450                $ddest = cleanfile($sourced, $dest, $blddir);
2451
2452                # If the destination doesn't exist in source, it can only
2453                # be a generated file in the build tree.
2454                if (! -f $ddest) {
2455                    $ddest = cleanfile($buildd, $dest, $blddir);
2456                }
2457            }
2458            foreach my $v (@{$defines{$dest}}) {
2459                $v =~ m|^([^=]*)(=.*)?$|;
2460                die "0 length macro name not permitted\n" if $1 eq "";
2461                if ($dest ne "") {
2462                    die "$1 defined more than once\n"
2463                        if defined $unified_info{defines}->{$ddest}->{$1};
2464                    $unified_info{defines}->{$ddest}->{$1} = $2;
2465                } else {
2466                    die "$1 defined more than once\n"
2467                        if grep { $v eq $_ } @{$config{defines}};
2468                    push @{$config{defines}}, $v;
2469                }
2470            }
2471        }
2472
2473        foreach my $section (keys %imagedocs) {
2474            foreach (@{$imagedocs{$section}}) {
2475                my $imagedocs = cleanfile($buildd, $_, $blddir);
2476                $unified_info{imagedocs}->{$section}->{$imagedocs} = 1;
2477            }
2478        }
2479
2480        foreach my $section (keys %htmldocs) {
2481            foreach (@{$htmldocs{$section}}) {
2482                my $htmldocs = cleanfile($buildd, $_, $blddir);
2483                $unified_info{htmldocs}->{$section}->{$htmldocs} = 1;
2484            }
2485        }
2486
2487        foreach my $section (keys %mandocs) {
2488            foreach (@{$mandocs{$section}}) {
2489                my $mandocs = cleanfile($buildd, $_, $blddir);
2490                $unified_info{mandocs}->{$section}->{$mandocs} = 1;
2491            }
2492        }
2493    }
2494
2495    my $ordinals_text = join(', ', sort keys %ordinals);
2496    warn <<"EOF" if $ordinals_text;
2497
2498WARNING: ORDINALS were specified for $ordinals_text
2499They are ignored and should be replaced with a combination of GENERATE,
2500DEPEND and SHARED_SOURCE.
2501EOF
2502
2503    # Check that each generated file is only generated once
2504    my $ambiguous_generation = 0;
2505    foreach (sort keys %check_generate) {
2506        my @generators = sort keys %{$check_generate{$_}};
2507        my $generators_txt = join(', ', @generators);
2508        if (scalar @generators > 1) {
2509            warn "$_ is GENERATEd by more than one generator ($generators_txt)\n";
2510            $ambiguous_generation++;
2511        }
2512        if ($check_generate{$_}->{$generators[0]} > 1) {
2513            warn "INFO: $_ has more than one GENERATE declaration (same generator)\n"
2514        }
2515    }
2516    die "There are ambiguous source file generations\n"
2517        if $ambiguous_generation > 0;
2518
2519    # All given source files should exist, or if generated, their
2520    # generator should exist.  This loop ensures this is true.
2521    my $missing = 0;
2522    foreach my $orig (sort keys %check_exist) {
2523        foreach my $dest (@{$check_exist{$orig}}) {
2524            if ($orig ne $src_configdata) {
2525                if ($orig =~ /\.a$/) {
2526                    # Static library names may be used as sources, so we
2527                    # need to detect those and give them special treatment.
2528                    unless (grep { $_ eq $orig }
2529                            keys %{$unified_info{libraries}}) {
2530                        warn "$orig is given as source for $dest, but no such library is built\n";
2531                        $missing++;
2532                    }
2533                } else {
2534                    # A source may be generated, and its generator may be
2535                    # generated as well.  We therefore loop to dig out the
2536                    # first generator.
2537                    my $gen = $orig;
2538
2539                    while (my @next = keys %{$check_generate{$gen}}) {
2540                        $gen = $next[0];
2541                    }
2542
2543                    if (! -f $gen) {
2544                        if ($gen ne $orig) {
2545                            $missing++;
2546                            warn "$orig is given as source for $dest, but its generator (leading to $gen) is missing\n";
2547                        } else {
2548                            $missing++;
2549                            warn "$orig is given as source for $dest, but is missing\n";
2550                        }
2551                    }
2552                }
2553            }
2554        }
2555    }
2556    die "There are files missing\n" if $missing > 0;
2557
2558    # Go through the sources of all libraries and check that the same basename
2559    # doesn't appear more than once.  Some static library archivers depend on
2560    # them being unique.
2561    {
2562        my $err = 0;
2563        foreach my $prod (keys %{$unified_info{libraries}}) {
2564            my @prod_sources =
2565                map { keys %{$unified_info{sources}->{$_}} }
2566                keys %{$unified_info{sources}->{$prod}};
2567            my %srccnt = ();
2568
2569            # Count how many times a given each source basename
2570            # appears for each product.
2571            foreach my $src (@prod_sources) {
2572                $srccnt{basename $src}++;
2573            }
2574
2575            foreach my $src (keys %srccnt) {
2576                if ((my $cnt = $srccnt{$src}) > 1) {
2577                    print STDERR "$src appears $cnt times for the product $prod\n";
2578                    $err++
2579                }
2580            }
2581        }
2582        die if $err > 0;
2583    }
2584
2585    # Massage the result
2586
2587    # If we depend on a header file or a perl module, add an inclusion of
2588    # its directory to allow smoothe inclusion
2589    foreach my $dest (keys %{$unified_info{depends}}) {
2590        next if $dest eq "";
2591        foreach my $d (keys %{$unified_info{depends}->{$dest}}) {
2592            next unless $d =~ /\.(h|pm)$/;
2593            my $i = dirname($d);
2594            my $spot =
2595                $d eq "configdata.pm" || defined($unified_info{generate}->{$d})
2596                ? 'build' : 'source';
2597            push @{$unified_info{includes}->{$dest}->{$spot}}, $i
2598                unless grep { $_ eq $i } @{$unified_info{includes}->{$dest}->{$spot}};
2599        }
2600    }
2601
2602    # Go through all intermediary files and change their names to something that
2603    # reflects what they will be built for.  Note that for some source files,
2604    # this leads to duplicate object files because they are used multiple times.
2605    # the goal is to rename all object files according to this scheme:
2606    #    {productname}-{midfix}-{origobjname}.[o|res]
2607    # the {midfix} is a keyword indicating the type of product, which is mostly
2608    # valuable for libraries since they come in two forms.
2609    #
2610    # This also reorganises the {sources} and {shared_sources} so that the
2611    # former only contains ALL object files that are supposed to end up in
2612    # static libraries and programs, while the latter contains ALL object files
2613    # that are supposed to end up in shared libraries and DSOs.
2614    # The main reason for having two different source structures is to allow
2615    # the same name to be used for the static and the shared variants of a
2616    # library.
2617    {
2618        # Take copies so we don't get interference from added stuff
2619        my %unified_copy = ();
2620        foreach (('sources', 'shared_sources')) {
2621            $unified_copy{$_} = { %{$unified_info{$_}} }
2622                if defined($unified_info{$_});
2623            delete $unified_info{$_};
2624        }
2625        foreach my $prodtype (('programs', 'libraries', 'modules', 'scripts')) {
2626            # $intent serves multi purposes:
2627            # - give a prefix for the new object files names
2628            # - in the case of libraries, rearrange the object files so static
2629            #   libraries use the 'sources' structure exclusively, while shared
2630            #   libraries use the 'shared_sources' structure exclusively.
2631            my $intent = {
2632                programs  => { bin    => { src => [ 'sources' ],
2633                                           dst => 'sources' } },
2634                libraries => { lib    => { src => [ 'sources' ],
2635                                           dst => 'sources' },
2636                               shlib  => { prodselect =>
2637                                               sub { grep !/\.a$/, @_ },
2638                                           src => [ 'sources',
2639                                                    'shared_sources' ],
2640                                           dst => 'shared_sources' } },
2641                modules   => { dso    => { src => [ 'sources' ],
2642                                           dst => 'sources' } },
2643                scripts   => { script => { src => [ 'sources' ],
2644                                           dst => 'sources' } }
2645               } -> {$prodtype};
2646            foreach my $kind (keys %$intent) {
2647                next if ($intent->{$kind}->{dst} eq 'shared_sources'
2648                             && $disabled{shared});
2649
2650                my @src = @{$intent->{$kind}->{src}};
2651                my $dst = $intent->{$kind}->{dst};
2652                my $prodselect = $intent->{$kind}->{prodselect} // sub { @_ };
2653                foreach my $prod ($prodselect->(keys %{$unified_info{$prodtype}})) {
2654                    # %prod_sources has all applicable objects as keys, and
2655                    # their corresponding sources as values
2656                    my %prod_sources =
2657                        map { $_ => [ keys %{$unified_copy{sources}->{$_}} ] }
2658                        map { keys %{$unified_copy{$_}->{$prod}} }
2659                        @src;
2660                    foreach (keys %prod_sources) {
2661                        # Only affect object files and resource files,
2662                        # the others simply get a new value
2663                        # (+1 instead of -1)
2664                        if ($_ =~ /\.(o|res)$/) {
2665                            (my $prodname = $prod) =~ s|\.a$||;
2666                            my $newobj =
2667                                catfile(dirname($_),
2668                                        basename($prodname)
2669                                            . '-' . $kind
2670                                            . '-' . basename($_));
2671                            $unified_info{$dst}->{$prod}->{$newobj} = 1;
2672                            foreach my $src (@{$prod_sources{$_}}) {
2673                                $unified_info{sources}->{$newobj}->{$src} = 1;
2674                                # Adjust source attributes
2675                                my $attrs = $unified_info{attributes}->{sources};
2676                                if (defined $attrs->{$prod}
2677                                    && defined $attrs->{$prod}->{$_}) {
2678                                    $attrs->{$prod}->{$newobj} =
2679                                        $attrs->{$prod}->{$_};
2680                                    delete $attrs->{$prod}->{$_};
2681                                }
2682                                foreach my $objsrc (keys %{$attrs->{$_} // {}}) {
2683                                    $attrs->{$newobj}->{$objsrc} =
2684                                        $attrs->{$_}->{$objsrc};
2685                                    delete $attrs->{$_}->{$objsrc};
2686                                }
2687                            }
2688                            # Adjust dependencies
2689                            foreach my $deps (keys %{$unified_info{depends}->{$_}}) {
2690                                $unified_info{depends}->{$_}->{$deps} = -1;
2691                                $unified_info{depends}->{$newobj}->{$deps} = 1;
2692                            }
2693                            # Adjust includes
2694                            foreach my $k (('source', 'build')) {
2695                                next unless
2696                                    defined($unified_info{includes}->{$_}->{$k});
2697                                my @incs = @{$unified_info{includes}->{$_}->{$k}};
2698                                $unified_info{includes}->{$newobj}->{$k} = [ @incs ];
2699                            }
2700                        } else {
2701                            $unified_info{$dst}->{$prod}->{$_} = 1;
2702                        }
2703                    }
2704                }
2705            }
2706        }
2707    }
2708
2709    # At this point, we have a number of sources with the value -1.  They
2710    # aren't part of the local build and are probably meant for a different
2711    # platform, and can therefore be cleaned away.  That happens when making
2712    # %unified_info more efficient below.
2713
2714    ### Make unified_info a bit more efficient
2715    # One level structures
2716    foreach (("programs", "libraries", "modules", "scripts", "targets")) {
2717        $unified_info{$_} = [ sort keys %{$unified_info{$_}} ];
2718    }
2719    # Two level structures
2720    foreach my $l1 (("sources", "shared_sources", "ldadd", "depends",
2721                     "imagedocs", "htmldocs", "mandocs")) {
2722        foreach my $l2 (sort keys %{$unified_info{$l1}}) {
2723            my @items =
2724                sort
2725                grep { $unified_info{$l1}->{$l2}->{$_} > 0 }
2726                keys %{$unified_info{$l1}->{$l2}};
2727            if (@items) {
2728                $unified_info{$l1}->{$l2} = [ @items ];
2729            } else {
2730                delete $unified_info{$l1}->{$l2};
2731            }
2732        }
2733    }
2734    # Defines
2735    foreach my $dest (sort keys %{$unified_info{defines}}) {
2736        $unified_info{defines}->{$dest}
2737            = [ map { $_.$unified_info{defines}->{$dest}->{$_} }
2738                sort keys %{$unified_info{defines}->{$dest}} ];
2739    }
2740    # Includes
2741    foreach my $dest (sort keys %{$unified_info{includes}}) {
2742        if (defined($unified_info{includes}->{$dest}->{build})) {
2743            my @source_includes = ();
2744            @source_includes = ( @{$unified_info{includes}->{$dest}->{source}} )
2745                if defined($unified_info{includes}->{$dest}->{source});
2746            $unified_info{includes}->{$dest} =
2747                [ @{$unified_info{includes}->{$dest}->{build}} ];
2748            foreach my $inc (@source_includes) {
2749                push @{$unified_info{includes}->{$dest}}, $inc
2750                    unless grep { $_ eq $inc } @{$unified_info{includes}->{$dest}};
2751            }
2752        } elsif (defined($unified_info{includes}->{$dest}->{source})) {
2753            $unified_info{includes}->{$dest} =
2754                [ @{$unified_info{includes}->{$dest}->{source}} ];
2755        } else {
2756            delete $unified_info{includes}->{$dest};
2757        }
2758    }
2759
2760    # For convenience collect information regarding directories where
2761    # files are generated, those generated files and the end product
2762    # they end up in where applicable.  Then, add build rules for those
2763    # directories
2764    my %loopinfo = ( "lib" => [ @{$unified_info{libraries}} ],
2765                     "dso" => [ @{$unified_info{modules}} ],
2766                     "bin" => [ @{$unified_info{programs}} ],
2767                     "script" => [ @{$unified_info{scripts}} ],
2768                     "docs" => [ (map { @{$unified_info{imagedocs}->{$_} // []} }
2769                                  keys %{$unified_info{imagedocs} // {}}),
2770                                 (map { @{$unified_info{htmldocs}->{$_} // []} }
2771                                  keys %{$unified_info{htmldocs} // {}}),
2772                                 (map { @{$unified_info{mandocs}->{$_} // []} }
2773                                  keys %{$unified_info{mandocs} // {}}) ] );
2774    foreach my $type (keys %loopinfo) {
2775        foreach my $product (@{$loopinfo{$type}}) {
2776            my %dirs = ();
2777            my $pd = dirname($product);
2778
2779            foreach (@{$unified_info{sources}->{$product} // []},
2780                     @{$unified_info{shared_sources}->{$product} // []}) {
2781                my $d = dirname($_);
2782
2783                # We don't want to create targets for source directories
2784                # when building out of source
2785                next if ($config{sourcedir} ne $config{builddir}
2786                             && $d =~ m|^\Q$config{sourcedir}\E|);
2787                # We already have a "test" target, and the current directory
2788                # is just silly to make a target for
2789                next if $d eq "test" || $d eq ".";
2790
2791                $dirs{$d} = 1;
2792                push @{$unified_info{dirinfo}->{$d}->{deps}}, $_
2793                    if $d ne $pd;
2794            }
2795            foreach (keys %dirs) {
2796                push @{$unified_info{dirinfo}->{$_}->{products}->{$type}},
2797                    $product;
2798            }
2799        }
2800    }
2801}
2802
2803# For the schemes that need it, we provide the old *_obj configs
2804# from the *_asm_obj ones
2805foreach (grep /_(asm|aux)_src$/, keys %target) {
2806    my $src = $_;
2807    (my $obj = $_) =~ s/_(asm|aux)_src$/_obj/;
2808    $target{$obj} = $target{$src};
2809    $target{$obj} =~ s/\.[csS]\b/.o/g; # C and assembler
2810    $target{$obj} =~ s/\.(cc|cpp)\b/_cc.o/g; # C++
2811}
2812
2813# Write down our configuration where it fits #########################
2814
2815my %template_vars = (
2816    config => \%config,
2817    target => \%target,
2818    disablables => \@disablables,
2819    disablables_int => \@disablables_int,
2820    disabled => \%disabled,
2821    withargs => \%withargs,
2822    unified_info => \%unified_info,
2823    tls => \@tls,
2824    dtls => \@dtls,
2825    makevars => [ sort keys %user ],
2826    disabled_info => \%disabled_info,
2827    user_crossable => \@user_crossable,
2828);
2829my $configdata_outname = 'configdata.pm';
2830print "Creating $configdata_outname\n";
2831open CONFIGDATA, ">$configdata_outname.new"
2832    or die "Trying to create $configdata_outname.new: $!";
2833my $configdata_tmplname = cleanfile($srcdir, "configdata.pm.in", $blddir);
2834my $configdata_tmpl =
2835    OpenSSL::Template->new(TYPE => 'FILE', SOURCE => $configdata_tmplname);
2836$configdata_tmpl->fill_in(
2837    FILENAME => $configdata_tmplname,
2838    OUTPUT => \*CONFIGDATA,
2839    HASH => { %template_vars,
2840              autowarntext => [
2841                  'WARNING: do not edit!',
2842                  "Generated by Configure from $configdata_tmplname",
2843              ] }
2844) or die $Text::Template::ERROR;
2845close CONFIGDATA;
2846rename "$configdata_outname.new", $configdata_outname;
2847if ($builder_platform eq 'unix') {
2848    my $mode = (0755 & ~umask);
2849    chmod $mode, 'configdata.pm'
2850        or warn sprintf("WARNING: Couldn't change mode for 'configdata.pm' to 0%03o: %s\n",$mode,$!);
2851}
2852
2853print "Running $configdata_outname\n";
2854my $perlcmd = (quotify("maybeshell", $config{PERL}))[0];
2855my $cmd = "$perlcmd $configdata_outname";
2856#print STDERR "DEBUG[run_dofile]: \$cmd = $cmd\n";
2857system($cmd);
2858exit 1 if $? != 0;
2859
2860$SIG{__DIE__} = $orig_death_handler;
2861
2862print <<"EOF" if ($disabled{threads} eq "unavailable");
2863
2864The library could not be configured for supporting multi-threaded
2865applications as the compiler options required on this system are not known.
2866See file INSTALL.md for details if you need multi-threading.
2867EOF
2868
2869print <<"EOF" if ($no_shared_warn);
2870
2871The options 'shared', 'pic' and 'dynamic-engine' aren't supported on this
2872platform, so we will pretend you gave the option 'no-pic', which also disables
2873'shared' and 'dynamic-engine'.  If you know how to implement shared libraries
2874or position independent code, please let us know (but please first make sure
2875you have tried with a current version of OpenSSL).
2876EOF
2877
2878print $banner;
2879
2880exit(0);
2881
2882######################################################################
2883#
2884# Helpers and utility functions
2885#
2886
2887# Death handler, to print a helpful message in case of failure #######
2888#
2889sub death_handler {
2890    die @_ if $^S;              # To prevent the added message in eval blocks
2891    my $build_file = $target{build_file} // "build file";
2892    my @message = ( <<"_____", @_ );
2893
2894Failure!  $build_file wasn't produced.
2895Please read INSTALL.md and associated NOTES-* files.  You may also have to
2896look over your available compiler tool chain or change your configuration.
2897
2898_____
2899
2900    # Dying is terminal, so it's ok to reset the signal handler here.
2901    $SIG{__DIE__} = $orig_death_handler;
2902    die @message;
2903}
2904
2905# Configuration file reading #########################################
2906
2907# Note: All of the helper functions are for lazy evaluation.  They all
2908# return a CODE ref, which will return the intended value when evaluated.
2909# Thus, whenever there's mention of a returned value, it's about that
2910# intended value.
2911
2912# Helper function to implement conditional value variants, with a default
2913# plus additional values based on the value of $config{build_type}.
2914# Arguments are given in hash table form:
2915#
2916#       picker(default => "Basic string: ",
2917#              debug   => "debug",
2918#              release => "release")
2919#
2920# When configuring with --debug, the resulting string will be
2921# "Basic string: debug", and when not, it will be "Basic string: release"
2922#
2923# This can be used to create variants of sets of flags according to the
2924# build type:
2925#
2926#       cflags => picker(default => "-Wall",
2927#                        debug   => "-g -O0",
2928#                        release => "-O3")
2929#
2930sub picker {
2931    my %opts = @_;
2932    return sub { add($opts{default} || (),
2933                     $opts{$config{build_type}} || ())->(); }
2934}
2935
2936# Helper function to combine several values of different types into one.
2937# This is useful if you want to combine a string with the result of a
2938# lazy function, such as:
2939#
2940#       cflags => combine("-Wall", sub { $disabled{zlib} ? () : "-DZLIB" })
2941#
2942sub combine {
2943    my @stuff = @_;
2944    return sub { add(@stuff)->(); }
2945}
2946
2947# Helper function to implement conditional values depending on the value
2948# of $disabled{threads}.  Can be used as follows:
2949#
2950#       cflags => combine("-Wall", threads("-pthread"))
2951#
2952sub threads {
2953    my @flags = @_;
2954    return sub { add($disabled{threads} ? () : @flags)->(); }
2955}
2956
2957sub shared {
2958    my @flags = @_;
2959    return sub { add($disabled{shared} ? () : @flags)->(); }
2960}
2961
2962our $add_called = 0;
2963# Helper function to implement adding values to already existing configuration
2964# values.  It handles elements that are ARRAYs, CODEs and scalars
2965sub _add {
2966    my $separator = shift;
2967
2968    # If there's any ARRAY in the collection of values OR the separator
2969    # is undef, we will return an ARRAY of combined values, otherwise a
2970    # string of joined values with $separator as the separator.
2971    my $found_array = !defined($separator);
2972
2973    my @values =
2974        map {
2975            my $res = $_;
2976            while (ref($res) eq "CODE") {
2977                $res = $res->();
2978            }
2979            if (defined($res)) {
2980                if (ref($res) eq "ARRAY") {
2981                    $found_array = 1;
2982                    @$res;
2983                } else {
2984                    $res;
2985                }
2986            } else {
2987                ();
2988            }
2989    } (@_);
2990
2991    $add_called = 1;
2992
2993    if ($found_array) {
2994        [ @values ];
2995    } else {
2996        join($separator, grep { defined($_) && $_ ne "" } @values);
2997    }
2998}
2999sub add_before {
3000    my $separator = " ";
3001    if (ref($_[$#_]) eq "HASH") {
3002        my $opts = pop;
3003        $separator = $opts->{separator};
3004    }
3005    my @x = @_;
3006    sub { _add($separator, @x, @_) };
3007}
3008sub add {
3009    my $separator = " ";
3010    if (ref($_[$#_]) eq "HASH") {
3011        my $opts = pop;
3012        $separator = $opts->{separator};
3013    }
3014    my @x = @_;
3015    sub { _add($separator, @_, @x) };
3016}
3017
3018sub read_eval_file {
3019    my $fname = shift;
3020    my $content;
3021    my @result;
3022
3023    open F, "< $fname" or die "Can't open '$fname': $!\n";
3024    {
3025        undef local $/;
3026        $content = <F>;
3027    }
3028    close F;
3029    {
3030        local $@;
3031
3032        @result = ( eval $content );
3033        warn $@ if $@;
3034    }
3035    return wantarray ? @result : $result[0];
3036}
3037
3038# configuration reader, evaluates the input file as a perl script and expects
3039# it to fill %targets with target configurations.  Those are then added to
3040# %table.
3041sub read_config {
3042    my $fname = shift;
3043    my %targets;
3044
3045    {
3046        # Protect certain tables from tampering
3047        local %table = ();
3048
3049        %targets = read_eval_file($fname);
3050    }
3051    my %preexisting = ();
3052    foreach (sort keys %targets) {
3053        $preexisting{$_} = 1 if $table{$_};
3054    }
3055    die <<"EOF",
3056The following config targets from $fname
3057shadow pre-existing config targets with the same name:
3058EOF
3059        map { "  $_\n" } sort keys %preexisting
3060        if %preexisting;
3061
3062
3063    # For each target, check that it's configured with a hash table.
3064    foreach (keys %targets) {
3065        if (ref($targets{$_}) ne "HASH") {
3066            if (ref($targets{$_}) eq "") {
3067                warn "Deprecated target configuration for $_, ignoring...\n";
3068            } else {
3069                warn "Misconfigured target configuration for $_ (should be a hash table), ignoring...\n";
3070            }
3071            delete $targets{$_};
3072        } else {
3073            $targets{$_}->{_conf_fname_int} = add([ $fname ]);
3074        }
3075    }
3076
3077    %table = (%table, %targets);
3078
3079}
3080
3081# configuration resolver.  Will only resolve all the lazy evaluation
3082# codeblocks for the chosen target and all those it inherits from,
3083# recursively
3084sub resolve_config {
3085    my $target = shift;
3086    my @breadcrumbs = @_;
3087
3088#    my $extra_checks = defined($ENV{CONFIGURE_EXTRA_CHECKS});
3089
3090    if (grep { $_ eq $target } @breadcrumbs) {
3091        die "inherit_from loop!  target backtrace:\n  "
3092            ,$target,"\n  ",join("\n  ", @breadcrumbs),"\n";
3093    }
3094
3095    if (!defined($table{$target})) {
3096        warn "Warning! target $target doesn't exist!\n";
3097        return ();
3098    }
3099    # Recurse through all inheritances.  They will be resolved on the
3100    # fly, so when this operation is done, they will all just be a
3101    # bunch of attributes with string values.
3102    # What we get here, though, are keys with references to lists of
3103    # the combined values of them all.  We will deal with lists after
3104    # this stage is done.
3105    my %combined_inheritance = ();
3106    if ($table{$target}->{inherit_from}) {
3107        my @inherit_from =
3108            map { ref($_) eq "CODE" ? $_->() : $_ } @{$table{$target}->{inherit_from}};
3109        foreach (@inherit_from) {
3110            my %inherited_config = resolve_config($_, $target, @breadcrumbs);
3111
3112            # 'template' is a marker that's considered private to
3113            # the config that had it.
3114            delete $inherited_config{template};
3115
3116            foreach (keys %inherited_config) {
3117                if (!$combined_inheritance{$_}) {
3118                    $combined_inheritance{$_} = [];
3119                }
3120                push @{$combined_inheritance{$_}}, $inherited_config{$_};
3121            }
3122        }
3123    }
3124
3125    # We won't need inherit_from in this target any more, since we've
3126    # resolved all the inheritances that lead to this
3127    delete $table{$target}->{inherit_from};
3128
3129    # Now is the time to deal with those lists.  Here's the place to
3130    # decide what shall be done with those lists, all based on the
3131    # values of the target we're currently dealing with.
3132    # - If a value is a coderef, it will be executed with the list of
3133    #   inherited values as arguments.
3134    # - If the corresponding key doesn't have a value at all or is the
3135    #   empty string, the inherited value list will be run through the
3136    #   default combiner (below), and the result becomes this target's
3137    #   value.
3138    # - Otherwise, this target's value is assumed to be a string that
3139    #   will simply override the inherited list of values.
3140    my $default_combiner = add();
3141
3142    my %all_keys =
3143        map { $_ => 1 } (keys %combined_inheritance,
3144                         keys %{$table{$target}});
3145
3146    sub process_values {
3147        my $object    = shift;
3148        my $inherited = shift;  # Always a [ list ]
3149        my $target    = shift;
3150        my $entry     = shift;
3151
3152        $add_called = 0;
3153
3154        while(ref($object) eq "CODE") {
3155            $object = $object->(@$inherited);
3156        }
3157        if (!defined($object)) {
3158            return ();
3159        }
3160        elsif (ref($object) eq "ARRAY") {
3161            local $add_called;  # To make sure recursive calls don't affect it
3162            return [ map { process_values($_, $inherited, $target, $entry) }
3163                     @$object ];
3164        } elsif (ref($object) eq "") {
3165            return $object;
3166        } else {
3167            die "cannot handle reference type ",ref($object)
3168                ," found in target ",$target," -> ",$entry,"\n";
3169        }
3170    }
3171
3172    foreach (sort keys %all_keys) {
3173        my $previous = $combined_inheritance{$_};
3174
3175        # Current target doesn't have a value for the current key?
3176        # Assign it the default combiner, the rest of this loop body
3177        # will handle it just like any other coderef.
3178        if (!exists $table{$target}->{$_}) {
3179            $table{$target}->{$_} = $default_combiner;
3180        }
3181
3182        $table{$target}->{$_} = process_values($table{$target}->{$_},
3183                                               $combined_inheritance{$_},
3184                                               $target, $_);
3185        unless(defined($table{$target}->{$_})) {
3186            delete $table{$target}->{$_};
3187        }
3188#        if ($extra_checks &&
3189#            $previous && !($add_called ||  $previous ~~ $table{$target}->{$_})) {
3190#            warn "$_ got replaced in $target\n";
3191#        }
3192    }
3193
3194    # Finally done, return the result.
3195    return %{$table{$target}};
3196}
3197
3198sub usage
3199        {
3200        print STDERR $usage;
3201        print STDERR "\npick os/compiler from:\n";
3202        my $j=0;
3203        my $i;
3204        my $k=0;
3205        foreach $i (sort keys %table)
3206                {
3207                next if $table{$i}->{template};
3208                next if $i =~ /^debug/;
3209                $k += length($i) + 1;
3210                if ($k > 78)
3211                        {
3212                        print STDERR "\n";
3213                        $k=length($i);
3214                        }
3215                print STDERR $i . " ";
3216                }
3217        foreach $i (sort keys %table)
3218                {
3219                next if $table{$i}->{template};
3220                next if $i !~ /^debug/;
3221                $k += length($i) + 1;
3222                if ($k > 78)
3223                        {
3224                        print STDERR "\n";
3225                        $k=length($i);
3226                        }
3227                print STDERR $i . " ";
3228                }
3229        exit(1);
3230        }
3231
3232sub compiler_predefined {
3233    state %predefined;
3234    my $cc = shift;
3235
3236    return () if $^O eq 'VMS';
3237
3238    die 'compiler_predefined called without a compiler command'
3239        unless $cc;
3240
3241    if (! $predefined{$cc}) {
3242
3243        $predefined{$cc} = {};
3244
3245        # collect compiler pre-defines from gcc or gcc-alike...
3246        open(PIPE, "$cc -dM -E -x c /dev/null 2>&1 |");
3247        while (my $l = <PIPE>) {
3248            $l =~ m/^#define\s+(\w+(?:\(\w+\))?)(?:\s+(.+))?/ or last;
3249            $predefined{$cc}->{$1} = $2 // '';
3250        }
3251        close(PIPE);
3252    }
3253
3254    return %{$predefined{$cc}};
3255}
3256
3257sub which
3258{
3259    my ($name)=@_;
3260
3261    if (eval { require IPC::Cmd; 1; }) {
3262        IPC::Cmd->import();
3263        return scalar IPC::Cmd::can_run($name);
3264    } else {
3265        # if there is $directories component in splitpath,
3266        # then it's not something to test with $PATH...
3267        return $name if (File::Spec->splitpath($name))[1];
3268
3269        foreach (File::Spec->path()) {
3270            my $fullpath = catfile($_, "$name$target{exe_extension}");
3271            if (-f $fullpath and -x $fullpath) {
3272                return $fullpath;
3273            }
3274        }
3275    }
3276}
3277
3278sub env
3279{
3280    my $name = shift;
3281    my %opts = @_;
3282
3283    unless ($opts{cacheonly}) {
3284        # Note that if $ENV{$name} doesn't exist or is undefined,
3285        # $config{perlenv}->{$name} will be created with the value
3286        # undef.  This is intentional.
3287
3288        $config{perlenv}->{$name} = $ENV{$name}
3289            if ! exists $config{perlenv}->{$name};
3290    }
3291    return $config{perlenv}->{$name};
3292}
3293
3294# Configuration printer ##############################################
3295
3296sub print_table_entry
3297{
3298    local $now_printing = shift;
3299    my %target = resolve_config($now_printing);
3300    my $type = shift;
3301
3302    # Don't print the templates
3303    return if $target{template};
3304
3305    my @sequence = (
3306        "sys_id",
3307        "cpp",
3308        "cppflags",
3309        "defines",
3310        "includes",
3311        "cc",
3312        "cflags",
3313        "ld",
3314        "lflags",
3315        "loutflag",
3316        "ex_libs",
3317        "bn_ops",
3318        "enable",
3319        "disable",
3320        "poly1035_asm_src",
3321        "thread_scheme",
3322        "perlasm_scheme",
3323        "dso_scheme",
3324        "shared_target",
3325        "shared_cflag",
3326        "shared_defines",
3327        "shared_ldflag",
3328        "shared_rcflag",
3329        "shared_extension",
3330        "dso_extension",
3331        "obj_extension",
3332        "exe_extension",
3333        "ranlib",
3334        "ar",
3335        "arflags",
3336        "aroutflag",
3337        "rc",
3338        "rcflags",
3339        "rcoutflag",
3340        "mt",
3341        "mtflags",
3342        "mtinflag",
3343        "mtoutflag",
3344        "multilib",
3345        "build_scheme",
3346        );
3347
3348    if ($type eq "TABLE") {
3349        print "\n";
3350        print "*** $now_printing\n";
3351        foreach (@sequence) {
3352            if (ref($target{$_}) eq "ARRAY") {
3353                printf "\$%-12s = %s\n", $_, join(" ", @{$target{$_}});
3354            } else {
3355                printf "\$%-12s = %s\n", $_, $target{$_};
3356            }
3357        }
3358    } elsif ($type eq "HASH") {
3359        my $largest =
3360            length((sort { length($a) <=> length($b) } @sequence)[-1]);
3361        print "    '$now_printing' => {\n";
3362        foreach (@sequence) {
3363            if ($target{$_}) {
3364                if (ref($target{$_}) eq "ARRAY") {
3365                    print "      '",$_,"'"," " x ($largest - length($_))," => [ ",join(", ", map { "'$_'" } @{$target{$_}})," ],\n";
3366                } else {
3367                    print "      '",$_,"'"," " x ($largest - length($_))," => '",$target{$_},"',\n";
3368                }
3369            }
3370        }
3371        print "    },\n";
3372    }
3373}
3374
3375# Utility routines ###################################################
3376
3377# On VMS, if the given file is a logical name, File::Spec::Functions
3378# will consider it an absolute path.  There are cases when we want a
3379# purely syntactic check without checking the environment.
3380sub isabsolute {
3381    my $file = shift;
3382
3383    # On non-platforms, we just use file_name_is_absolute().
3384    return file_name_is_absolute($file) unless $^O eq "VMS";
3385
3386    # If the file spec includes a device or a directory spec,
3387    # file_name_is_absolute() is perfectly safe.
3388    return file_name_is_absolute($file) if $file =~ m|[:\[]|;
3389
3390    # Here, we know the given file spec isn't absolute
3391    return 0;
3392}
3393
3394# Makes a directory absolute and cleans out /../ in paths like foo/../bar
3395# On some platforms, this uses rel2abs(), while on others, realpath() is used.
3396# realpath() requires that at least all path components except the last is an
3397# existing directory.  On VMS, the last component of the directory spec must
3398# exist.
3399sub absolutedir {
3400    my $dir = shift;
3401
3402    # realpath() is quite buggy on VMS.  It uses LIB$FID_TO_NAME, which
3403    # will return the volume name for the device, no matter what.  Also,
3404    # it will return an incorrect directory spec if the argument is a
3405    # directory that doesn't exist.
3406    if ($^O eq "VMS") {
3407        return rel2abs($dir);
3408    }
3409
3410    # We use realpath() on Unix, since no other will properly clean out
3411    # a directory spec.
3412    use Cwd qw/realpath/;
3413
3414    return realpath($dir);
3415}
3416
3417# Check if all paths are one and the same, using stat.  They must both exist
3418# We need this for the cases when File::Spec doesn't detect case insensitivity
3419# (File::Spec::Unix assumes case sensitivity)
3420sub samedir {
3421    die "samedir expects two arguments\n" unless scalar @_ == 2;
3422
3423    my @stat0 = stat($_[0]);    # First argument
3424    my @stat1 = stat($_[1]);    # Second argument
3425
3426    die "Couldn't stat $_[0]" unless @stat0;
3427    die "Couldn't stat $_[1]" unless @stat1;
3428
3429    # Compare device number
3430    return 0 unless ($stat0[0] == $stat1[0]);
3431    # Compare "inode".  The perl manual recommends comparing as
3432    # string rather than as number.
3433    return 0 unless ($stat0[1] eq $stat1[1]);
3434
3435    return 1;                   # All the same
3436}
3437
3438sub quotify {
3439    my %processors = (
3440        perl    => sub { my $x = shift;
3441                         $x =~ s/([\\\$\@"])/\\$1/g;
3442                         return '"'.$x.'"'; },
3443        maybeshell => sub { my $x = shift;
3444                            (my $y = $x) =~ s/([\\\"])/\\$1/g;
3445                            if ($x ne $y || $x =~ m|\s|) {
3446                                return '"'.$y.'"';
3447                            } else {
3448                                return $x;
3449                            }
3450                        },
3451        );
3452    my $for = shift;
3453    my $processor =
3454        defined($processors{$for}) ? $processors{$for} : sub { shift; };
3455
3456    return map { $processor->($_); } @_;
3457}
3458
3459# collect_from_file($filename, $line_concat_cond_re, $line_concat)
3460# $filename is a file name to read from
3461# $line_concat_cond_re is a regexp detecting a line continuation ending
3462# $line_concat is a CODEref that takes care of concatenating two lines
3463sub collect_from_file {
3464    my $filename = shift;
3465    my $line_concat_cond_re = shift;
3466    my $line_concat = shift;
3467
3468    open my $fh, $filename || die "unable to read $filename: $!\n";
3469    return sub {
3470        my $saved_line = "";
3471        $_ = "";
3472        while (<$fh>) {
3473            s|\R$||;
3474            if (defined $line_concat) {
3475                $_ = $line_concat->($saved_line, $_);
3476                $saved_line = "";
3477            }
3478            if (defined $line_concat_cond_re && /$line_concat_cond_re/) {
3479                $saved_line = $_;
3480                next;
3481            }
3482            return $_;
3483        }
3484        die "$filename ending with continuation line\n" if $_;
3485        close $fh;
3486        return undef;
3487    }
3488}
3489
3490# collect_from_array($array, $line_concat_cond_re, $line_concat)
3491# $array is an ARRAYref of lines
3492# $line_concat_cond_re is a regexp detecting a line continuation ending
3493# $line_concat is a CODEref that takes care of concatenating two lines
3494sub collect_from_array {
3495    my $array = shift;
3496    my $line_concat_cond_re = shift;
3497    my $line_concat = shift;
3498    my @array = (@$array);
3499
3500    return sub {
3501        my $saved_line = "";
3502        $_ = "";
3503        while (defined($_ = shift @array)) {
3504            s|\R$||;
3505            if (defined $line_concat) {
3506                $_ = $line_concat->($saved_line, $_);
3507                $saved_line = "";
3508            }
3509            if (defined $line_concat_cond_re && /$line_concat_cond_re/) {
3510                $saved_line = $_;
3511                next;
3512            }
3513            return $_;
3514        }
3515        die "input text ending with continuation line\n" if $_;
3516        return undef;
3517    }
3518}
3519
3520# collect_information($lineiterator, $line_continue, $regexp => $CODEref, ...)
3521# $lineiterator is a CODEref that delivers one line at a time.
3522# All following arguments are regex/CODEref pairs, where the regexp detects a
3523# line and the CODEref does something with the result of the regexp.
3524sub collect_information {
3525    my $lineiterator = shift;
3526    my %collectors = @_;
3527
3528    while(defined($_ = $lineiterator->())) {
3529        s|\R$||;
3530        my $found = 0;
3531        if ($collectors{"BEFORE"}) {
3532            $collectors{"BEFORE"}->($_);
3533        }
3534        foreach my $re (keys %collectors) {
3535            if ($re !~ /^OTHERWISE|BEFORE|AFTER$/ && /$re/) {
3536                $collectors{$re}->($lineiterator);
3537                $found = 1;
3538            };
3539        }
3540        if ($collectors{"OTHERWISE"}) {
3541            $collectors{"OTHERWISE"}->($lineiterator, $_)
3542                unless $found || !defined $collectors{"OTHERWISE"};
3543        }
3544        if ($collectors{"AFTER"}) {
3545            $collectors{"AFTER"}->($_);
3546        }
3547    }
3548}
3549
3550# tokenize($line)
3551# tokenize($line,$separator)
3552# $line is a line of text to split up into tokens
3553# $separator [optional] is a regular expression that separates the tokens,
3554# the default being spaces.  Do not use quotes of any kind as separators,
3555# that will give undefined results.
3556# Returns a list of tokens.
3557#
3558# Tokens are divided by separator (spaces by default).  If the tokens include
3559# the separators, they have to be quoted with single or double quotes.
3560# Double quotes inside a double quoted token must be escaped.  Escaping is done
3561# with backslash.
3562# Basically, the same quoting rules apply for " and ' as in any
3563# Unix shell.
3564sub tokenize {
3565    my $line = my $debug_line = shift;
3566    my $separator = shift // qr|\s+|;
3567    my @result = ();
3568
3569    if ($ENV{CONFIGURE_DEBUG_TOKENIZE}) {
3570        print STDERR "DEBUG[tokenize]: \$separator = $separator\n";
3571    }
3572
3573    while ($line =~ s|^${separator}||, $line ne "") {
3574        my $token = "";
3575    again:
3576        $line =~ m/^(.*?)(${separator}|"|'|$)/;
3577        $token .= $1;
3578        $line = $2.$';
3579
3580        if ($line =~ m/^"((?:[^"\\]+|\\.)*)"/) {
3581            $token .= $1;
3582            $line = $';
3583            goto again;
3584        } elsif ($line =~ m/^'([^']*)'/) {
3585            $token .= $1;
3586            $line = $';
3587            goto again;
3588        }
3589        push @result, $token;
3590    }
3591
3592    if ($ENV{CONFIGURE_DEBUG_TOKENIZE}) {
3593        print STDERR "DEBUG[tokenize]: Parsed '$debug_line' into:\n";
3594        print STDERR "DEBUG[tokenize]: ('", join("', '", @result), "')\n";
3595    }
3596    return @result;
3597}
3598