1# config/perl.m4
2
3
4# PGAC_PATH_PERL
5# --------------
6AC_DEFUN([PGAC_PATH_PERL],
7[PGAC_PATH_PROGS(PERL, perl)
8AC_ARG_VAR(PERL, [Perl program])dnl
9
10if test "$PERL"; then
11  pgac_perl_version=`$PERL -v 2>/dev/null | sed -n ['s/This is perl.*v[a-z ]*\([0-9]\.[0-9][0-9.]*\).*$/\1/p']`
12  AC_MSG_NOTICE([using perl $pgac_perl_version])
13  if echo "$pgac_perl_version" | sed ['s/[.a-z_]/ /g'] | \
14    $AWK '{ if ([$]1 == 5 && [$]2 >= 8) exit 1; else exit 0;}'
15  then
16    AC_MSG_WARN([
17*** The installed version of Perl, $PERL, is too old to use with PostgreSQL.
18*** Perl version 5.8 or later is required, but this is $pgac_perl_version.])
19    PERL=""
20  fi
21fi
22
23if test -z "$PERL"; then
24  AC_MSG_WARN([
25*** Without Perl you will not be able to build PostgreSQL from Git.
26*** You can obtain Perl from any CPAN mirror site.
27*** (If you are using the official distribution of PostgreSQL then you do not
28*** need to worry about this, because the Perl output is pre-generated.)])
29fi
30])# PGAC_PATH_PERL
31
32
33# PGAC_CHECK_PERL_CONFIG(NAME)
34# ----------------------------
35AC_DEFUN([PGAC_CHECK_PERL_CONFIG],
36[AC_REQUIRE([PGAC_PATH_PERL])
37AC_MSG_CHECKING([for Perl $1])
38perl_$1=`$PERL -MConfig -e 'print $Config{$1}'`
39test "$PORTNAME" = "win32" && perl_$1=`echo $perl_$1 | sed 's,\\\\,/,g'`
40AC_SUBST(perl_$1)dnl
41AC_MSG_RESULT([$perl_$1])])
42
43
44# PGAC_CHECK_PERL_CONFIGS(NAMES)
45# ------------------------------
46AC_DEFUN([PGAC_CHECK_PERL_CONFIGS],
47[m4_foreach([pgac_item], [$1], [PGAC_CHECK_PERL_CONFIG(pgac_item)])])
48
49
50# PGAC_CHECK_PERL_EMBED_CCFLAGS
51# -----------------------------
52# We selectively extract stuff from $Config{ccflags}.  For debugging purposes,
53# let's have the configure output report the raw ccflags value as well as the
54# set of flags we chose to adopt.  We don't really need anything except -D
55# switches, and other sorts of compiler switches can actively break things if
56# Perl was compiled with a different compiler.  Moreover, although Perl likes
57# to put stuff like -D_LARGEFILE_SOURCE and -D_FILE_OFFSET_BITS=64 here, it
58# would be fatal to try to compile PL/Perl to a different libc ABI than core
59# Postgres uses.  The available information says that most symbols that affect
60# Perl's own ABI begin with letters, so it's almost sufficient to adopt -D
61# switches for symbols not beginning with underscore.  Some exceptions are the
62# Windows-specific -D_USE_32BIT_TIME_T and -D__MINGW_USE_VC2005_COMPAT; see
63# Mkvcbuild.pm for details.  We absorb the former when Perl reports it.  Perl
64# never reports the latter, and we don't attempt to deduce when it's needed.
65# Consequently, we don't support using MinGW to link to MSVC-built Perl.  As
66# of 2017, all supported ActivePerl and Strawberry Perl are MinGW-built.  If
67# that changes or an MSVC-built Perl distribution becomes prominent, we can
68# revisit this limitation.
69AC_DEFUN([PGAC_CHECK_PERL_EMBED_CCFLAGS],
70[AC_REQUIRE([PGAC_PATH_PERL])
71AC_MSG_CHECKING([for CFLAGS recommended by Perl])
72perl_ccflags=`$PERL -MConfig -e ['print $Config{ccflags}']`
73AC_MSG_RESULT([$perl_ccflags])
74AC_MSG_CHECKING([for CFLAGS to compile embedded Perl])
75perl_embed_ccflags=`$PERL -MConfig -e ['foreach $f (split(" ",$Config{ccflags})) {print $f, " " if ($f =~ /^-D[^_]/ || $f =~ /^-D_USE_32BIT_TIME_T/)}']`
76AC_SUBST(perl_embed_ccflags)dnl
77AC_MSG_RESULT([$perl_embed_ccflags])
78])# PGAC_CHECK_PERL_EMBED_CCFLAGS
79
80
81# PGAC_CHECK_PERL_EMBED_LDFLAGS
82# -----------------------------
83# We are after Embed's ldopts, but without the subset mentioned in
84# Config's ccdlflags; and also without any -arch flags, which recent
85# Apple releases put in unhelpfully.  (If you want a multiarch build
86# you'd better be specifying it in more places than plperl's final link.)
87AC_DEFUN([PGAC_CHECK_PERL_EMBED_LDFLAGS],
88[AC_REQUIRE([PGAC_PATH_PERL])
89AC_MSG_CHECKING(for flags to link embedded Perl)
90if test "$PORTNAME" = "win32" ; then
91	perl_lib=`basename $perl_archlibexp/CORE/perl[[5-9]]*.lib .lib`
92	if test -e "$perl_archlibexp/CORE/$perl_lib.lib"; then
93		perl_embed_ldflags="-L$perl_archlibexp/CORE -l$perl_lib"
94	else
95		perl_lib=`basename $perl_archlibexp/CORE/libperl[[5-9]]*.a .a | sed 's/^lib//'`
96		if test -e "$perl_archlibexp/CORE/lib$perl_lib.a"; then
97			perl_embed_ldflags="-L$perl_archlibexp/CORE -l$perl_lib"
98		fi
99	fi
100else
101	pgac_tmp1=`$PERL -MExtUtils::Embed -e ldopts`
102	pgac_tmp2=`$PERL -MConfig -e 'print $Config{ccdlflags}'`
103	perl_embed_ldflags=`echo X"$pgac_tmp1" | sed -e "s/^X//" -e "s%$pgac_tmp2%%" -e ["s/ -arch [-a-zA-Z0-9_]*//g"]`
104fi
105AC_SUBST(perl_embed_ldflags)dnl
106if test -z "$perl_embed_ldflags" ; then
107	AC_MSG_RESULT(no)
108	AC_MSG_ERROR([could not determine flags for linking embedded Perl.
109This probably means that ExtUtils::Embed or ExtUtils::MakeMaker is not
110installed.])
111else
112	AC_MSG_RESULT([$perl_embed_ldflags])
113fi
114])# PGAC_CHECK_PERL_EMBED_LDFLAGS
115