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1aef975c 1# hints/linux.sh
a0d0e21e 2# Original version by rsanders
1fc4cb55 3# Additional support by Kenneth Albanowski <kjahds@kjahds.com>
1aef975c 4#
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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>
1aef975c 8#
232e078e 9# Consolidated by Andy Dougherty <doughera@lafcol.lafayette.edu>
1fc4cb55 10#
9bed9d38 11# Updated Thu Feb 8 11:56:10 EST 1996
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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>
232e078e 17
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18# No version of Linux supports setuid scripts.
19d_suidsafe='undef'
f3db1d4d 20
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21# Debian and Red Hat, and perhaps other vendors, provide both runtime and
22# development packages for some libraries. The runtime packages contain shared
23# libraries with version information in their names (e.g., libgdbm.so.1.7.3);
24# the development packages supplement this with versionless shared libraries
25# (e.g., libgdbm.so).
26#
27# If you want to link against such a library, you must install the development
28# version of the package.
29#
30# These packages use a -dev naming convention in both Debian and Red Hat:
31# libgdbmg1 (non-development version of GNU libc 2-linked GDBM library)
32# libgdbmg1-dev (development version of GNU libc 2-linked GDBM library)
33# So make sure that for any libraries you wish to link Perl with under
34# Debian or Red Hat you have the -dev packages installed.
35#
36# Some operating systems (e.g., Solaris 2.6) will link to a versioned shared
37# library implicitly. For example, on Solaris, `ld foo.o -lgdbm' will find an
38# appropriate version of libgdbm, if one is available; Linux, however, doesn't
39# do the implicit mapping.
40ignore_versioned_solibs='y'
41
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42# perl goes into the /usr tree. See the Filesystem Standard
43# available via anonymous FTP at tsx-11.mit.edu in
44# /pub/linux/docs/linux-standards/fsstnd.
16d20bd9 45# Allow a command line override, e.g. Configure -Dprefix=/foo/bar
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46case "$prefix" in
47'') prefix='/usr' ;;
48esac
1fc4cb55 49
16d20bd9 50# gcc-2.6.3 defines _G_HAVE_BOOL to 1, but doesn't actually supply bool.
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51ccflags="-Dbool=char -DHAS_BOOL $ccflags"
52
53# BSD compatability library no longer needed
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54# 'kaffe' has a /usr/lib/libnet.so which is not at all relevent for perl.
55set `echo X "$libswanted "| sed -e 's/ bsd / /' -e 's/ net / /'`
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56shift
57libswanted="$*"
1fc4cb55 58
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59# Configure may fail to find lstat() since it's a static/inline
60# function in <sys/stat.h>.
61d_lstat=define
1aef975c 62
16d20bd9 63# Explanation?
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64case "$usemymalloc" in
65'') usemymalloc='n' ;;
66esac
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67
68case "$optimize" in
69'') optimize='-O2' ;;
70esac
71
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72# Are we using ELF? Thanks to Kenneth Albanowski <kjahds@kjahds.com>
73# for this test.
74cat >try.c <<'EOM'
75/* Test for whether ELF binaries are produced */
76#include <fcntl.h>
77#include <stdlib.h>
78main() {
79 char buffer[4];
80 int i=open("a.out",O_RDONLY);
81 if(i==-1)
82 exit(1); /* fail */
83 if(read(i,&buffer[0],4)<4)
84 exit(1); /* fail */
85 if(buffer[0] != 127 || buffer[1] != 'E' ||
86 buffer[2] != 'L' || buffer[3] != 'F')
87 exit(1); /* fail */
88 exit(0); /* succeed (yes, it's ELF) */
89}
90EOM
f0b7e567 91if ${cc:-gcc} try.c >/dev/null 2>&1 && ./a.out; then
ef0c9946 92 cat <<'EOM' >&4
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93
94You appear to have ELF support. I'll try to use it for dynamic loading.
ef0c9946 95If dynamic loading doesn't work, read hints/linux.sh for further information.
232e078e 96EOM
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97
98#For RedHat Linux 3.0.3, you may need to fetch
99# ftp://ftp.redhat.com/pub/redhat-3.0.3/i386/updates/RPMS/ld.so-1.7.14-3.i386.rpm
100#
101
232e078e 102else
ef0c9946 103 cat <<'EOM' >&4
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104
105You don't have an ELF gcc. I will use dld if possible. If you are
106using a version of DLD earlier than 3.2.6, or don't have it at all, you
107should probably upgrade. If you are forced to use 3.2.4, you should
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108uncomment a couple of lines in hints/linux.sh and restart Configure so
109that shared libraries will be disallowed.
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110
111EOM
232e078e 112 lddlflags="-r $lddlflags"
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113 # These empty values are so that Configure doesn't put in the
114 # Linux ELF values.
115 ccdlflags=' '
116 cccdlflags=' '
c07a80fd 117 ccflags="-DOVR_DBL_DIG=14 $ccflags"
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118 so='sa'
119 dlext='o'
a5f75d66 120 nm_so_opt=' '
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121 ## If you are using DLD 3.2.4 which does not support shared libs,
122 ## uncomment the next two lines:
123 #ldflags="-static"
124 #so='none'
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125
126 # In addition, on some systems there is a problem with perl and NDBM
127 # which causes AnyDBM and NDBM_File to lock up. This is evidenced
128 # in the tests as AnyDBM just freezing. Apparently, this only
129 # happens on a.out systems, so we disable NDBM for all a.out linux
130 # systems. If someone can suggest a more robust test
131 # that would be appreciated.
132 #
133 # More info:
134 # Date: Wed, 7 Feb 1996 03:21:04 +0900
135 # From: Jeffrey Friedl <jfriedl@nff.ncl.omron.co.jp>
136 #
137 # I tried compiling with DBM support and sure enough things locked up
138 # just as advertised. Checking into it, I found that the lockup was
139 # during the call to dbm_open. Not *in* dbm_open -- but between the call
140 # to and the jump into.
141 #
142 # To make a long story short, making sure that the *.a and *.sa pairs of
143 # /usr/lib/lib{m,db,gdbm}.{a,sa}
144 # were perfectly in sync took care of it.
145 #
146 # This will generate a harmless Whoa There! message
147 case "$d_dbm_open" in
148 '') cat <<'EOM' >&4
149
150Disabling ndbm. This will generate a Whoa There message in Configure.
151Read hints/linux.sh for further information.
152EOM
153 # You can override this with Configure -Dd_dbm_open
154 d_dbm_open=undef
155 ;;
156 esac
232e078e 157fi
a0d0e21e 158
c2960299 159rm -f try.c a.out
16d20bd9 160
c2960299 161if /bin/bash -c exit; then
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162 echo ''
163 echo 'You appear to have a working bash. Good.'
c2960299 164else
ef0c9946 165 cat << 'EOM' >&4
a0d0e21e 166
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167*********************** Warning! *********************
168It would appear you have a defective bash shell installed. This is likely to
169give you a failure of op/exec test #5 during the test phase of the build,
170Upgrading to a recent version (1.14.4 or later) should fix the problem.
171******************************************************
a0d0e21e 172EOM
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173
174fi
16d20bd9 175
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176# On SPARClinux,
177# The following csh consistently coredumped in the test directory
178# "/home/mikedlr/perl5.003_94/t", though not most other directories.
179
180#Name : csh Distribution: Red Hat Linux (Rembrandt)
181#Version : 5.2.6 Vendor: Red Hat Software
182#Release : 3 Build Date: Fri May 24 19:42:14 1996
183#Install date: Thu Jul 11 16:20:14 1996 Build Host: itchy.redhat.com
184#Group : Shells Source RPM: csh-5.2.6-3.src.rpm
185#Size : 184417
186#Description : BSD c-shell
187
188# For this reason I suggest using the much bug-fixed tcsh for globbing
189# where available.
190
191if [ ! "`csh -c 'echo $version' 2>/dev/null`" ]
192then
46fc3d4c 193 echo 'Real csh found (might break); looking for tcsh ...'
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194 # Use ./UU/loc to find tcsh. (We no longer run in the hints/ directory)
195 if xxx=`./UU/loc tcsh blurfl $pth`; $test -f "$xxx"; then
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196 echo "Found tcsh. I'll use it for globbing."
197 # We can't change Configure's setting of $csh, due to the way
198 # Configure handles $d_portable and commands found in $loclist.
199 # We can set the value for CSH in config.h by setting full_csh.
200 full_csh=$xxx
201 else
202 echo "Couldn't find tcsh. BEWARE: GLOBBING MIGHT BE BROKEN."
203 fi
284c50cc 204else
46fc3d4c 205 echo 'Your csh is really tcsh. Good.'
284c50cc 206fi
dc66995c 207
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208# Shimpei Yamashita <shimpei@socrates.patnet.caltech.edu>
209# Message-Id: <33EF1634.B36B6500@pobox.com>
210#
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211# The DR2 of MkLinux (osname=linux,archname=ppc-linux) may need
212# special flags passed in order for dynamic loading to work.
92526645 213# instead of the recommended:
17ff8a05 214#
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215# ccdlflags='-rdynamic'
216#
217# it should be:
218# ccdlflags='-Wl,-E'
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219#
220# So if your DR2 (DR3 came out summer 1998, consider upgrading)
221# has problems with dynamic loading, uncomment the
222# following three lines, make distclean, and re-Configure:
223#case "`uname -r | sed 's/^[0-9.-]*//'``arch`" in
224#'osfmach3ppc') ccdlflags='-Wl,-E' ;;
225#esac
92526645 226
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227# This script UU/usethreads.cbu will get 'called-back' by Configure
228# after it has prompted the user for whether to use threads.
229cat > UU/usethreads.cbu <<'EOCBU'
230case "$usethreads" in
231$define|true|[yY]*)
232 ccflags="-D_REENTRANT $ccflags"
233 set `echo X "$libswanted "| sed -e 's/ c / pthread c /'`
234 shift
235 libswanted="$*"
236 ;;
237esac
238EOCBU