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Changes for hints/linux.sh for Purify
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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
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42# BSD compatibility library no longer needed
43# 'kaffe' has a /usr/lib/libnet.so which is not at all relevant for perl.
44# bind causes issues with several reentrant functions
45set `echo X "$libswanted "| sed -e 's/ bsd / /' -e 's/ net / /' -e 's/ bind / /'`
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46shift
47libswanted="$*"
1fc4cb55 48
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49# If you have glibc, then report the version for ./myconfig bug reporting.
50# (Configure doesn't need to know the specific version since it just uses
51# gcc to load the library for all tests.)
f443a56e 52# We don't use __GLIBC__ and __GLIBC_MINOR__ because they
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53# are insufficiently precise to distinguish things like
54# libc-2.0.6 and libc-2.0.7.
55if test -L /lib/libc.so.6; then
56 libc=`ls -l /lib/libc.so.6 | awk '{print $NF}'`
57 libc=/lib/$libc
58fi
59
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60# Configure may fail to find lstat() since it's a static/inline
61# function in <sys/stat.h>.
62d_lstat=define
1aef975c 63
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64# malloc wrap works
65case "$usemallocwrap" in
66'') usemallocwrap='define' ;;
67esac
68
f443a56e 69# The system malloc() is about as fast and as frugal as perl's.
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70# Since the system malloc() has been the default since at least
71# 5.001, we might as well leave it that way. --AD 10 Jan 2002
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72case "$usemymalloc" in
73'') usemymalloc='n' ;;
74esac
1aef975c 75
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76# Check if we're about to use Intel's ICC compiler
77case "`${cc:-cc} -V 2>&1`" in
87d05bbe 78*"Intel(R) C++ Compiler"*|*"Intel(R) C Compiler"*)
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79 # This is needed for Configure's prototype checks to work correctly
80 ccflags="-we147 $ccflags"
81 # If we're using ICC, we usually want the best performance
82 case "$optimize" in
83 '') optimize='-O3' ;;
84 esac
85 ;;
86esac
87
1aef975c 88case "$optimize" in
051e4fe1 89# use -O2 by default ; -O3 doesn't seem to bring significant benefits with gcc
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90'')
91 optimize='-O2'
92 case "`uname -m`" in
93 ppc*)
94 # on ppc, it seems that gcc (at least gcc 3.3.2) isn't happy
95 # with -O2 ; so downgrade to -O1.
96 optimize='-O1'
97 ;;
98 esac
99 ;;
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100esac
101
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102# Are we using ELF? Thanks to Kenneth Albanowski <kjahds@kjahds.com>
103# for this test.
104cat >try.c <<'EOM'
105/* Test for whether ELF binaries are produced */
106#include <fcntl.h>
107#include <stdlib.h>
108main() {
109 char buffer[4];
110 int i=open("a.out",O_RDONLY);
111 if(i==-1)
112 exit(1); /* fail */
113 if(read(i,&buffer[0],4)<4)
114 exit(1); /* fail */
115 if(buffer[0] != 127 || buffer[1] != 'E' ||
116 buffer[2] != 'L' || buffer[3] != 'F')
117 exit(1); /* fail */
118 exit(0); /* succeed (yes, it's ELF) */
119}
120EOM
5440bc8e 121if ${cc:-gcc} try.c >/dev/null 2>&1 && $run ./a.out; then
ef0c9946 122 cat <<'EOM' >&4
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123
124You appear to have ELF support. I'll try to use it for dynamic loading.
ef0c9946 125If dynamic loading doesn't work, read hints/linux.sh for further information.
232e078e 126EOM
ef0c9946 127
232e078e 128else
ef0c9946 129 cat <<'EOM' >&4
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130
131You don't have an ELF gcc. I will use dld if possible. If you are
132using a version of DLD earlier than 3.2.6, or don't have it at all, you
133should probably upgrade. If you are forced to use 3.2.4, you should
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134uncomment a couple of lines in hints/linux.sh and restart Configure so
135that shared libraries will be disallowed.
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136
137EOM
232e078e 138 lddlflags="-r $lddlflags"
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139 # These empty values are so that Configure doesn't put in the
140 # Linux ELF values.
141 ccdlflags=' '
142 cccdlflags=' '
c07a80fd 143 ccflags="-DOVR_DBL_DIG=14 $ccflags"
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144 so='sa'
145 dlext='o'
a5f75d66 146 nm_so_opt=' '
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147 ## If you are using DLD 3.2.4 which does not support shared libs,
148 ## uncomment the next two lines:
149 #ldflags="-static"
150 #so='none'
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151
152 # In addition, on some systems there is a problem with perl and NDBM
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153 # which causes AnyDBM and NDBM_File to lock up. This is evidenced
154 # in the tests as AnyDBM just freezing. Apparently, this only
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155 # happens on a.out systems, so we disable NDBM for all a.out linux
156 # systems. If someone can suggest a more robust test
157 # that would be appreciated.
158 #
159 # More info:
160 # Date: Wed, 7 Feb 1996 03:21:04 +0900
161 # From: Jeffrey Friedl <jfriedl@nff.ncl.omron.co.jp>
162 #
163 # I tried compiling with DBM support and sure enough things locked up
164 # just as advertised. Checking into it, I found that the lockup was
165 # during the call to dbm_open. Not *in* dbm_open -- but between the call
166 # to and the jump into.
f443a56e 167 #
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168 # To make a long story short, making sure that the *.a and *.sa pairs of
169 # /usr/lib/lib{m,db,gdbm}.{a,sa}
170 # were perfectly in sync took care of it.
171 #
172 # This will generate a harmless Whoa There! message
173 case "$d_dbm_open" in
174 '') cat <<'EOM' >&4
175
176Disabling ndbm. This will generate a Whoa There message in Configure.
177Read hints/linux.sh for further information.
178EOM
179 # You can override this with Configure -Dd_dbm_open
180 d_dbm_open=undef
181 ;;
182 esac
232e078e 183fi
a0d0e21e 184
c2960299 185rm -f try.c a.out
16d20bd9 186
e218ce4d 187if /bin/sh -c exit; then
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188 echo ''
189 echo 'You appear to have a working bash. Good.'
c2960299 190else
ef0c9946 191 cat << 'EOM' >&4
a0d0e21e 192
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193*********************** Warning! *********************
194It would appear you have a defective bash shell installed. This is likely to
195give you a failure of op/exec test #5 during the test phase of the build,
196Upgrading to a recent version (1.14.4 or later) should fix the problem.
197******************************************************
a0d0e21e 198EOM
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199
200fi
16d20bd9 201
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202# On SPARClinux,
203# The following csh consistently coredumped in the test directory
204# "/home/mikedlr/perl5.003_94/t", though not most other directories.
205
206#Name : csh Distribution: Red Hat Linux (Rembrandt)
207#Version : 5.2.6 Vendor: Red Hat Software
208#Release : 3 Build Date: Fri May 24 19:42:14 1996
209#Install date: Thu Jul 11 16:20:14 1996 Build Host: itchy.redhat.com
210#Group : Shells Source RPM: csh-5.2.6-3.src.rpm
211#Size : 184417
212#Description : BSD c-shell
213
214# For this reason I suggest using the much bug-fixed tcsh for globbing
215# where available.
216
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217# November 2001: That warning's pretty old now and probably not so
218# relevant, especially since perl now uses File::Glob for globbing.
219# We'll still look for tcsh, but tone down the warnings.
220# Andy Dougherty, Nov. 6, 2001
221if $csh -c 'echo $version' >/dev/null 2>&1; then
222 echo 'Your csh is really tcsh. Good.'
223else
99cae59c 224 if xxx=`./UU/loc tcsh blurfl $pth`; $test -f "$xxx"; then
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225 echo "Found tcsh. I'll use it for globbing."
226 # We can't change Configure's setting of $csh, due to the way
227 # Configure handles $d_portable and commands found in $loclist.
228 # We can set the value for CSH in config.h by setting full_csh.
229 full_csh=$xxx
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230 elif [ -f "$csh" ]; then
231 echo "Couldn't find tcsh. Csh-based globbing might be broken."
46fc3d4c 232 fi
284c50cc 233fi
dc66995c 234
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235# Shimpei Yamashita <shimpei@socrates.patnet.caltech.edu>
236# Message-Id: <33EF1634.B36B6500@pobox.com>
f443a56e 237#
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238# The DR2 of MkLinux (osname=linux,archname=ppc-linux) may need
239# special flags passed in order for dynamic loading to work.
92526645 240# instead of the recommended:
17ff8a05 241#
92526645 242# ccdlflags='-rdynamic'
f443a56e 243#
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244# it should be:
245# ccdlflags='-Wl,-E'
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246#
247# So if your DR2 (DR3 came out summer 1998, consider upgrading)
248# has problems with dynamic loading, uncomment the
249# following three lines, make distclean, and re-Configure:
250#case "`uname -r | sed 's/^[0-9.-]*//'``arch`" in
251#'osfmach3ppc') ccdlflags='-Wl,-E' ;;
252#esac
92526645 253
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254case "`uname -m`" in
255sparc*)
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256 case "$cccdlflags" in
257 *-fpic*) cccdlflags="`echo $cccdlflags|sed 's/-fpic/-fPIC/'`" ;;
258 *) cccdlflags="$cccdlflags -fPIC" ;;
259 esac
260 ;;
261esac
262
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263# SuSE8.2 has /usr/lib/libndbm* which are ld scripts rather than
264# true libraries. The scripts cause binding against static
265# version of -lgdbm which is a bad idea. So if we have 'nm'
266# make sure it can read the file
267# NI-S 2003/08/07
268if [ -r /usr/lib/libndbm.so -a -x /usr/bin/nm ] ; then
269 if /usr/bin/nm /usr/lib/libndbm.so >/dev/null 2>&1 ; then
270 echo 'Your shared -lndbm seems to be a real library.'
271 else
272 echo 'Your shared -lndbm is not a real library.'
273 set `echo X "$libswanted "| sed -e 's/ ndbm / /'`
274 shift
275 libswanted="$*"
276 fi
277fi
278
279
280# This script UU/usethreads.cbu will get 'called-back' by Configure
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281# after it has prompted the user for whether to use threads.
282cat > UU/usethreads.cbu <<'EOCBU'
283case "$usethreads" in
284$define|true|[yY]*)
4d76a344 285 ccflags="-D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS $ccflags"
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286 set `echo X "$libswanted "| sed -e 's/ c / pthread c /'`
287 shift
288 libswanted="$*"
47b8d1e2 289
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290 # Somehow at least in Debian 2.2 these manage to escape
291 # the #define forest of <features.h> and <time.h> so that
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292 # the hasproto macro of Configure doesn't see these protos,
293 # even with the -D_GNU_SOURCE.
47b8d1e2 294
a48ec845 295 d_asctime_r_proto="$define"
47b8d1e2 296 d_crypt_r_proto="$define"
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297 d_ctime_r_proto="$define"
298 d_gmtime_r_proto="$define"
299 d_localtime_r_proto="$define"
01b53dac 300 d_random_r_proto="$define"
47b8d1e2 301
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302 ;;
303esac
304EOCBU
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305
306cat > UU/uselargefiles.cbu <<'EOCBU'
f443a56e 307# This script UU/uselargefiles.cbu will get 'called-back' by Configure
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308# after it has prompted the user for whether to use large files.
309case "$uselargefiles" in
310''|$define|true|[yY]*)
9422c00b 311# Keep this in the left margin.
45c9e83b 312ccflags_uselargefiles="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
9422c00b 313
45c9e83b 314 ccflags="$ccflags $ccflags_uselargefiles"
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315 ;;
316esac
317EOCBU
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318
319# Purify fails to link Perl if a "-lc" is passed into its linker
320# due to duplicate symbols.
321case "$PURIFY" in
322$define|true|[yY]*)
323 set `echo X "$libswanted "| sed -e 's/ c / /'`
324 shift
325 libswanted="$*"
326 ;;
327esac