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