xref: /openbsd/gnu/usr.bin/perl/hints/linux.sh (revision f2dfb0a4) 
1# hints/linux.sh
2# Original version by rsanders
3# Additional support by Kenneth Albanowski <kjahds@kjahds.com>
4#
5# ELF support by H.J. Lu <hjl@nynexst.com>
6# Additional info from Nigel Head <nhead@ESOC.bitnet>
7# and Kenneth Albanowski <kjahds@kjahds.com>
8#
9# Consolidated by Andy Dougherty <doughera@lafcol.lafayette.edu>
10#
11# Updated Thu Feb  8 11:56:10 EST 1996
12
13# Updated Thu May 30 10:50:22 EDT 1996 by <doughera@lafcol.lafayette.edu>
14
15# Updated Fri Jun 21 11:07:54 EDT 1996
16# NDBM support for ELF renabled by <kjahds@kjahds.com>
17
18# No version of Linux supports setuid scripts.
19d_suidsafe='undef'
20
21# perl goes into the /usr tree.  See the Filesystem Standard
22# available via anonymous FTP at tsx-11.mit.edu in
23# /pub/linux/docs/linux-standards/fsstnd.
24# Allow a command line override, e.g. Configure -Dprefix=/foo/bar
25case "$prefix" in
26'') prefix='/usr' ;;
27esac
28
29# gcc-2.6.3 defines _G_HAVE_BOOL to 1, but doesn't actually supply bool.
30ccflags="-Dbool=char -DHAS_BOOL $ccflags"
31
32# libc6, aka glibc2, seems to need STRUCT_TM_HASZONE defined.
33# Thanks to Bart Schuller <schuller@Lunatech.com>
34# See Message-ID: <19971009002636.50729@tanglefoot>
35# This is currently commented out for maintenance releases
36# but should probably be uncommented for 5.005 or after
37# more widespread testing.
38#POSIX_cflags='ccflags="$ccflags -DSTRUCT_TM_HASZONE"'
39
40# BSD compatability library no longer needed
41set `echo X "$libswanted "| sed -e 's/ bsd / /'`
42shift
43libswanted="$*"
44
45# Configure may fail to find lstat() since it's a static/inline
46# function in <sys/stat.h>.
47d_lstat=define
48
49# Explanation?
50case "$usemymalloc" in
51'') usemymalloc='n' ;;
52esac
53
54case "$optimize" in
55'') optimize='-O2' ;;
56esac
57
58# Are we using ELF?  Thanks to Kenneth Albanowski <kjahds@kjahds.com>
59# for this test.
60cat >try.c <<'EOM'
61/* Test for whether ELF binaries are produced */
62#include <fcntl.h>
63#include <stdlib.h>
64main() {
65	char buffer[4];
66	int i=open("a.out",O_RDONLY);
67	if(i==-1)
68		exit(1); /* fail */
69	if(read(i,&buffer[0],4)<4)
70		exit(1); /* fail */
71	if(buffer[0] != 127 || buffer[1] != 'E' ||
72           buffer[2] != 'L' || buffer[3] != 'F')
73		exit(1); /* fail */
74	exit(0); /* succeed (yes, it's ELF) */
75}
76EOM
77if ${cc:-gcc} try.c >/dev/null 2>&1 && ./a.out; then
78    cat <<'EOM' >&4
79
80You appear to have ELF support.  I'll try to use it for dynamic loading.
81If dynamic loading doesn't work, read hints/linux.sh for further information.
82EOM
83
84#For RedHat Linux 3.0.3, you may need to fetch
85# ftp://ftp.redhat.com/pub/redhat-3.0.3/i386/updates/RPMS/ld.so-1.7.14-3.i386.rpm
86#
87
88else
89    cat <<'EOM' >&4
90
91You don't have an ELF gcc.  I will use dld if possible.  If you are
92using a version of DLD earlier than 3.2.6, or don't have it at all, you
93should probably upgrade. If you are forced to use 3.2.4, you should
94uncomment a couple of lines in hints/linux.sh and restart Configure so
95that shared libraries will be disallowed.
96
97EOM
98    lddlflags="-r $lddlflags"
99    # These empty values are so that Configure doesn't put in the
100    # Linux ELF values.
101    ccdlflags=' '
102    cccdlflags=' '
103    ccflags="-DOVR_DBL_DIG=14 $ccflags"
104    so='sa'
105    dlext='o'
106    nm_so_opt=' '
107    ## If you are using DLD 3.2.4 which does not support shared libs,
108    ## uncomment the next two lines:
109    #ldflags="-static"
110    #so='none'
111
112	# In addition, on some systems there is a problem with perl and NDBM
113	# which causes AnyDBM and NDBM_File to lock up. This is evidenced
114	# in the tests as AnyDBM just freezing.  Apparently, this only
115	# happens on a.out systems, so we disable NDBM for all a.out linux
116	# systems.  If someone can suggest a more robust test
117	#  that would be appreciated.
118	#
119	# More info:
120	# Date: Wed, 7 Feb 1996 03:21:04 +0900
121	# From: Jeffrey Friedl <jfriedl@nff.ncl.omron.co.jp>
122	#
123	# I tried compiling with DBM support and sure enough things locked up
124	# just as advertised. Checking into it, I found that the lockup was
125	# during the call to dbm_open. Not *in* dbm_open -- but between the call
126	# to and the jump into.
127	#
128	# To make a long story short, making sure that the *.a and *.sa pairs of
129	#   /usr/lib/lib{m,db,gdbm}.{a,sa}
130	# were perfectly in sync took care of it.
131	#
132	# This will generate a harmless Whoa There! message
133	case "$d_dbm_open" in
134	'')	cat <<'EOM' >&4
135
136Disabling ndbm.  This will generate a Whoa There message in Configure.
137Read hints/linux.sh for further information.
138EOM
139		# You can override this with Configure -Dd_dbm_open
140		d_dbm_open=undef
141		;;
142	esac
143fi
144
145rm -f try.c a.out
146
147if /bin/bash -c exit; then
148  echo ''
149  echo 'You appear to have a working bash.  Good.'
150else
151  cat << 'EOM' >&4
152
153*********************** Warning! *********************
154It would appear you have a defective bash shell installed. This is likely to
155give you a failure of op/exec test #5 during the test phase of the build,
156Upgrading to a recent version (1.14.4 or later) should fix the problem.
157******************************************************
158EOM
159
160fi
161
162# On SPARClinux,
163# The following csh consistently coredumped in the test directory
164# "/home/mikedlr/perl5.003_94/t", though not most other directories.
165
166#Name        : csh                    Distribution: Red Hat Linux (Rembrandt)
167#Version     : 5.2.6                        Vendor: Red Hat Software
168#Release     : 3                        Build Date: Fri May 24 19:42:14 1996
169#Install date: Thu Jul 11 16:20:14 1996 Build Host: itchy.redhat.com
170#Group       : Shells                   Source RPM: csh-5.2.6-3.src.rpm
171#Size        : 184417
172#Description : BSD c-shell
173
174# For this reason I suggest using the much bug-fixed tcsh for globbing
175# where available.
176
177if [  ! "`csh -c 'echo $version' 2>/dev/null`"  ]
178then
179    echo 'Real csh found (might break); looking for tcsh ...'
180    # Use ../UU/loc to find tcsh.  (We run in the hints/ directory.)
181    if xxx=`../UU/loc tcsh blurfl $pth`; $test -f "$xxx"; then
182	echo "Found tcsh.  I'll use it for globbing."
183	# We can't change Configure's setting of $csh, due to the way
184	# Configure handles $d_portable and commands found in $loclist.
185	# We can set the value for CSH in config.h by setting full_csh.
186	full_csh=$xxx
187    else
188	echo "Couldn't find tcsh.  BEWARE:  GLOBBING MIGHT BE BROKEN."
189    fi
190else
191    echo 'Your csh is really tcsh.  Good.'
192fi
193
194# Shimpei Yamashita <shimpei@socrates.patnet.caltech.edu>
195# Message-Id: <33EF1634.B36B6500@pobox.com>
196#
197# MkLinux (osname=linux,archname=ppc-linux), which differs slightly from other
198# linuces, needs special flags passed in order for dynamic loading to work.
199# instead of the recommended:
200# ccdlflags='-rdynamic'
201#
202# it should be:
203# ccdlflags='-Wl,-E'
204
205