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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#
c3404dc3 9# Consolidated by Andy Dougherty <doughera@lafayette.edu>
1fc4cb55 10#
9bed9d38 11# Updated Thu Feb 8 11:56:10 EST 1996
ef0c9946 12
c3404dc3 13# Updated Thu May 30 10:50:22 EDT 1996 by <doughera@lafayette.edu>
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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
4bf4dbb3 42# BSD compatability library no longer needed
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43# 'kaffe' has a /usr/lib/libnet.so which is not at all relevent for perl.
44set `echo X "$libswanted "| sed -e 's/ bsd / /' -e 's/ net / /'`
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45shift
46libswanted="$*"
1fc4cb55 47
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48# If you have glibc, then report the version for ./myconfig bug reporting.
49# (Configure doesn't need to know the specific version since it just uses
50# gcc to load the library for all tests.)
f443a56e 51# We don't use __GLIBC__ and __GLIBC_MINOR__ because they
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52# are insufficiently precise to distinguish things like
53# libc-2.0.6 and libc-2.0.7.
54if test -L /lib/libc.so.6; then
55 libc=`ls -l /lib/libc.so.6 | awk '{print $NF}'`
56 libc=/lib/$libc
57fi
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
f443a56e 63# The system malloc() is about as fast and as frugal as perl's.
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64# Since the system malloc() has been the default since at least
65# 5.001, we might as well leave it that way. --AD 10 Jan 2002
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66case "$usemymalloc" in
67'') usemymalloc='n' ;;
68esac
1aef975c 69
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70# Check if we're about to use Intel's ICC compiler
71case "`${cc:-cc} -V 2>&1`" in
72*"Intel(R) C++ Compiler"*)
73 # This is needed for Configure's prototype checks to work correctly
74 ccflags="-we147 $ccflags"
75 # If we're using ICC, we usually want the best performance
76 case "$optimize" in
77 '') optimize='-O3' ;;
78 esac
79 ;;
80esac
81
1aef975c 82case "$optimize" in
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83'') # If we have modern enough gcc and well-supported enough CPU,
84 # crank up the optimization level.
85 case "`${cc:-gcc} -v 2>&1`" in
bb010532 86 *"gcc version 2.95"*|*"gcc version 3."*)
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87 case "`arch 2>&1`" in
88 i?86|ppc) optimize='-O3' ;;
89 esac
90 ;;
91 esac
92 case "$optimize" in
93 '') optimize='-O2' ;;
94 esac
95 ;;
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96esac
97
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98# Are we using ELF? Thanks to Kenneth Albanowski <kjahds@kjahds.com>
99# for this test.
100cat >try.c <<'EOM'
101/* Test for whether ELF binaries are produced */
102#include <fcntl.h>
103#include <stdlib.h>
104main() {
105 char buffer[4];
106 int i=open("a.out",O_RDONLY);
107 if(i==-1)
108 exit(1); /* fail */
109 if(read(i,&buffer[0],4)<4)
110 exit(1); /* fail */
111 if(buffer[0] != 127 || buffer[1] != 'E' ||
112 buffer[2] != 'L' || buffer[3] != 'F')
113 exit(1); /* fail */
114 exit(0); /* succeed (yes, it's ELF) */
115}
116EOM
5440bc8e 117if ${cc:-gcc} try.c >/dev/null 2>&1 && $run ./a.out; then
ef0c9946 118 cat <<'EOM' >&4
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119
120You appear to have ELF support. I'll try to use it for dynamic loading.
ef0c9946 121If dynamic loading doesn't work, read hints/linux.sh for further information.
232e078e 122EOM
ef0c9946 123
232e078e 124else
ef0c9946 125 cat <<'EOM' >&4
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126
127You don't have an ELF gcc. I will use dld if possible. If you are
128using a version of DLD earlier than 3.2.6, or don't have it at all, you
129should probably upgrade. If you are forced to use 3.2.4, you should
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130uncomment a couple of lines in hints/linux.sh and restart Configure so
131that shared libraries will be disallowed.
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132
133EOM
232e078e 134 lddlflags="-r $lddlflags"
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135 # These empty values are so that Configure doesn't put in the
136 # Linux ELF values.
137 ccdlflags=' '
138 cccdlflags=' '
c07a80fd 139 ccflags="-DOVR_DBL_DIG=14 $ccflags"
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140 so='sa'
141 dlext='o'
a5f75d66 142 nm_so_opt=' '
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143 ## If you are using DLD 3.2.4 which does not support shared libs,
144 ## uncomment the next two lines:
145 #ldflags="-static"
146 #so='none'
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147
148 # In addition, on some systems there is a problem with perl and NDBM
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149 # which causes AnyDBM and NDBM_File to lock up. This is evidenced
150 # in the tests as AnyDBM just freezing. Apparently, this only
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151 # happens on a.out systems, so we disable NDBM for all a.out linux
152 # systems. If someone can suggest a more robust test
153 # that would be appreciated.
154 #
155 # More info:
156 # Date: Wed, 7 Feb 1996 03:21:04 +0900
157 # From: Jeffrey Friedl <jfriedl@nff.ncl.omron.co.jp>
158 #
159 # I tried compiling with DBM support and sure enough things locked up
160 # just as advertised. Checking into it, I found that the lockup was
161 # during the call to dbm_open. Not *in* dbm_open -- but between the call
162 # to and the jump into.
f443a56e 163 #
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164 # To make a long story short, making sure that the *.a and *.sa pairs of
165 # /usr/lib/lib{m,db,gdbm}.{a,sa}
166 # were perfectly in sync took care of it.
167 #
168 # This will generate a harmless Whoa There! message
169 case "$d_dbm_open" in
170 '') cat <<'EOM' >&4
171
172Disabling ndbm. This will generate a Whoa There message in Configure.
173Read hints/linux.sh for further information.
174EOM
175 # You can override this with Configure -Dd_dbm_open
176 d_dbm_open=undef
177 ;;
178 esac
232e078e 179fi
a0d0e21e 180
c2960299 181rm -f try.c a.out
16d20bd9 182
e218ce4d 183if /bin/sh -c exit; then
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184 echo ''
185 echo 'You appear to have a working bash. Good.'
c2960299 186else
ef0c9946 187 cat << 'EOM' >&4
a0d0e21e 188
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189*********************** Warning! *********************
190It would appear you have a defective bash shell installed. This is likely to
191give you a failure of op/exec test #5 during the test phase of the build,
192Upgrading to a recent version (1.14.4 or later) should fix the problem.
193******************************************************
a0d0e21e 194EOM
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195
196fi
16d20bd9 197
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198# On SPARClinux,
199# The following csh consistently coredumped in the test directory
200# "/home/mikedlr/perl5.003_94/t", though not most other directories.
201
202#Name : csh Distribution: Red Hat Linux (Rembrandt)
203#Version : 5.2.6 Vendor: Red Hat Software
204#Release : 3 Build Date: Fri May 24 19:42:14 1996
205#Install date: Thu Jul 11 16:20:14 1996 Build Host: itchy.redhat.com
206#Group : Shells Source RPM: csh-5.2.6-3.src.rpm
207#Size : 184417
208#Description : BSD c-shell
209
210# For this reason I suggest using the much bug-fixed tcsh for globbing
211# where available.
212
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213# November 2001: That warning's pretty old now and probably not so
214# relevant, especially since perl now uses File::Glob for globbing.
215# We'll still look for tcsh, but tone down the warnings.
216# Andy Dougherty, Nov. 6, 2001
217if $csh -c 'echo $version' >/dev/null 2>&1; then
218 echo 'Your csh is really tcsh. Good.'
219else
99cae59c 220 if xxx=`./UU/loc tcsh blurfl $pth`; $test -f "$xxx"; then
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221 echo "Found tcsh. I'll use it for globbing."
222 # We can't change Configure's setting of $csh, due to the way
223 # Configure handles $d_portable and commands found in $loclist.
224 # We can set the value for CSH in config.h by setting full_csh.
225 full_csh=$xxx
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226 elif [ -f "$csh" ]; then
227 echo "Couldn't find tcsh. Csh-based globbing might be broken."
46fc3d4c 228 fi
284c50cc 229fi
dc66995c 230
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231# Shimpei Yamashita <shimpei@socrates.patnet.caltech.edu>
232# Message-Id: <33EF1634.B36B6500@pobox.com>
f443a56e 233#
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234# The DR2 of MkLinux (osname=linux,archname=ppc-linux) may need
235# special flags passed in order for dynamic loading to work.
92526645 236# instead of the recommended:
17ff8a05 237#
92526645 238# ccdlflags='-rdynamic'
f443a56e 239#
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240# it should be:
241# ccdlflags='-Wl,-E'
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242#
243# So if your DR2 (DR3 came out summer 1998, consider upgrading)
244# has problems with dynamic loading, uncomment the
245# following three lines, make distclean, and re-Configure:
246#case "`uname -r | sed 's/^[0-9.-]*//'``arch`" in
247#'osfmach3ppc') ccdlflags='-Wl,-E' ;;
248#esac
92526645 249
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250case "`uname -m`" in
251sparc*)
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252 case "$cccdlflags" in
253 *-fpic*) cccdlflags="`echo $cccdlflags|sed 's/-fpic/-fPIC/'`" ;;
254 *) cccdlflags="$cccdlflags -fPIC" ;;
255 esac
256 ;;
257esac
258
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259# SuSE8.2 has /usr/lib/libndbm* which are ld scripts rather than
260# true libraries. The scripts cause binding against static
261# version of -lgdbm which is a bad idea. So if we have 'nm'
262# make sure it can read the file
263# NI-S 2003/08/07
264if [ -r /usr/lib/libndbm.so -a -x /usr/bin/nm ] ; then
265 if /usr/bin/nm /usr/lib/libndbm.so >/dev/null 2>&1 ; then
266 echo 'Your shared -lndbm seems to be a real library.'
267 else
268 echo 'Your shared -lndbm is not a real library.'
269 set `echo X "$libswanted "| sed -e 's/ ndbm / /'`
270 shift
271 libswanted="$*"
272 fi
273fi
274
275
276# This script UU/usethreads.cbu will get 'called-back' by Configure
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277# after it has prompted the user for whether to use threads.
278cat > UU/usethreads.cbu <<'EOCBU'
279case "$usethreads" in
280$define|true|[yY]*)
4d76a344 281 ccflags="-D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS $ccflags"
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282 set `echo X "$libswanted "| sed -e 's/ c / pthread c /'`
283 shift
284 libswanted="$*"
47b8d1e2 285
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286 # Somehow at least in Debian 2.2 these manage to escape
287 # the #define forest of <features.h> and <time.h> so that
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288 # the hasproto macro of Configure doesn't see these protos,
289 # even with the -D_GNU_SOURCE.
47b8d1e2 290
a48ec845 291 d_asctime_r_proto="$define"
47b8d1e2 292 d_crypt_r_proto="$define"
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293 d_ctime_r_proto="$define"
294 d_gmtime_r_proto="$define"
295 d_localtime_r_proto="$define"
01b53dac 296 d_random_r_proto="$define"
47b8d1e2 297
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298 ;;
299esac
300EOCBU
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301
302cat > UU/uselargefiles.cbu <<'EOCBU'
f443a56e 303# This script UU/uselargefiles.cbu will get 'called-back' by Configure
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304# after it has prompted the user for whether to use large files.
305case "$uselargefiles" in
306''|$define|true|[yY]*)
9422c00b 307# Keep this in the left margin.
45c9e83b 308ccflags_uselargefiles="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
9422c00b 309
45c9e83b 310 ccflags="$ccflags $ccflags_uselargefiles"
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311 ;;
312esac
313EOCBU