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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#
232e078e 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
f3db1d4d 18# No version of Linux supports setuid scripts.
19d_suidsafe='undef'
f3db1d4d 20
1cfa4ec7 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.
9c12f1e5 35
36# SuSE Linux can be used as cross-compilation host for Cray XT4 Catamount/Qk.
37if test -d /opt/xt-pe
38then
39 case "`cc -V 2>&1`" in
40 *catamount*) . hints/catamount.sh; return ;;
41 esac
42fi
43
1cfa4ec7 44# Some operating systems (e.g., Solaris 2.6) will link to a versioned shared
45# library implicitly. For example, on Solaris, `ld foo.o -lgdbm' will find an
46# appropriate version of libgdbm, if one is available; Linux, however, doesn't
47# do the implicit mapping.
48ignore_versioned_solibs='y'
49
2d1d6bf6 50# BSD compatibility library no longer needed
51# 'kaffe' has a /usr/lib/libnet.so which is not at all relevant for perl.
52# bind causes issues with several reentrant functions
53set `echo X "$libswanted "| sed -e 's/ bsd / /' -e 's/ net / /' -e 's/ bind / /'`
4bf4dbb3 54shift
55libswanted="$*"
1fc4cb55 56
a4ea3e34 57# If you have glibc, then report the version for ./myconfig bug reporting.
58# (Configure doesn't need to know the specific version since it just uses
59# gcc to load the library for all tests.)
f443a56e 60# We don't use __GLIBC__ and __GLIBC_MINOR__ because they
a4ea3e34 61# are insufficiently precise to distinguish things like
62# libc-2.0.6 and libc-2.0.7.
63if test -L /lib/libc.so.6; then
64 libc=`ls -l /lib/libc.so.6 | awk '{print $NF}'`
65 libc=/lib/$libc
66fi
67
232e078e 68# Configure may fail to find lstat() since it's a static/inline
69# function in <sys/stat.h>.
70d_lstat=define
1aef975c 71
da0b61dd 72# malloc wrap works
73case "$usemallocwrap" in
74'') usemallocwrap='define' ;;
75esac
76
f443a56e 77# The system malloc() is about as fast and as frugal as perl's.
c3404dc3 78# Since the system malloc() has been the default since at least
79# 5.001, we might as well leave it that way. --AD 10 Jan 2002
c07a80fd 80case "$usemymalloc" in
81'') usemymalloc='n' ;;
82esac
1aef975c 83
06d57135 84# Check if we're about to use Intel's ICC compiler
85case "`${cc:-cc} -V 2>&1`" in
87d05bbe 86*"Intel(R) C++ Compiler"*|*"Intel(R) C Compiler"*)
06d57135 87 # This is needed for Configure's prototype checks to work correctly
383f9357 88 # The -mp flag is needed to pass various floating point related tests
6ae709ad 89 # The -no-gcc flag is needed otherwise, icc pretends (poorly) to be gcc
383f9357 90 ccflags="-we147 -mp -no-gcc $ccflags"
06d57135 91 # If we're using ICC, we usually want the best performance
92 case "$optimize" in
93 '') optimize='-O3' ;;
94 esac
95 ;;
6452e86c 96*"Sun C"*)
97 optimize='-xO2'
98 cccdlflags='-KPIC'
99 lddlflags='-G -Bdynamic'
2f7602ba 100 # Sun C doesn't support gcc attributes, but, in many cases, doesn't
101 # complain either. Not all cases, though.
102 d_attribute_format='undef'
103 d_attribute_malloc='undef'
104 d_attribute_nonnull='undef'
105 d_attribute_noreturn='undef'
106 d_attribute_pure='undef'
107 d_attribute_unused='undef'
108 d_attribute_warn_unused_result='undef'
6452e86c 109 ;;
06d57135 110esac
111
1aef975c 112case "$optimize" in
051e4fe1 113# use -O2 by default ; -O3 doesn't seem to bring significant benefits with gcc
be92ff21 114'')
115 optimize='-O2'
116 case "`uname -m`" in
117 ppc*)
118 # on ppc, it seems that gcc (at least gcc 3.3.2) isn't happy
f88ad257 119 # with -O2 ; so downgrade to -O1.
be92ff21 120 optimize='-O1'
121 ;;
f88ad257 122 ia64*)
123 # This architecture has had various problems with gcc's
124 # in the 3.2, 3.3, and 3.4 releases when optimized to -O2. See
125 # RT #37156 for a discussion of the problem.
126 case "`${cc:-gcc} -v 2>&1`" in
127 *"version 3.2"*|*"version 3.3"*|*"version 3.4"*)
128 ccflags="-fno-delete-null-pointer-checks $ccflags"
129 ;;
130 esac
131 ;;
be92ff21 132 esac
133 ;;
1aef975c 134esac
135
232e078e 136# Are we using ELF? Thanks to Kenneth Albanowski <kjahds@kjahds.com>
137# for this test.
138cat >try.c <<'EOM'
139/* Test for whether ELF binaries are produced */
140#include <fcntl.h>
141#include <stdlib.h>
b1e55cab 142#include <unistd.h>
232e078e 143main() {
144 char buffer[4];
145 int i=open("a.out",O_RDONLY);
146 if(i==-1)
147 exit(1); /* fail */
148 if(read(i,&buffer[0],4)<4)
149 exit(1); /* fail */
150 if(buffer[0] != 127 || buffer[1] != 'E' ||
151 buffer[2] != 'L' || buffer[3] != 'F')
152 exit(1); /* fail */
153 exit(0); /* succeed (yes, it's ELF) */
154}
155EOM
5440bc8e 156if ${cc:-gcc} try.c >/dev/null 2>&1 && $run ./a.out; then
ef0c9946 157 cat <<'EOM' >&4
232e078e 158
159You appear to have ELF support. I'll try to use it for dynamic loading.
ef0c9946 160If dynamic loading doesn't work, read hints/linux.sh for further information.
232e078e 161EOM
ef0c9946 162
232e078e 163else
ef0c9946 164 cat <<'EOM' >&4
16d20bd9 165
166You don't have an ELF gcc. I will use dld if possible. If you are
167using a version of DLD earlier than 3.2.6, or don't have it at all, you
168should probably upgrade. If you are forced to use 3.2.4, you should
c2960299 169uncomment a couple of lines in hints/linux.sh and restart Configure so
170that shared libraries will be disallowed.
16d20bd9 171
172EOM
232e078e 173 lddlflags="-r $lddlflags"
5d94fbed 174 # These empty values are so that Configure doesn't put in the
175 # Linux ELF values.
176 ccdlflags=' '
177 cccdlflags=' '
c07a80fd 178 ccflags="-DOVR_DBL_DIG=14 $ccflags"
1aef975c 179 so='sa'
180 dlext='o'
a5f75d66 181 nm_so_opt=' '
1aef975c 182 ## If you are using DLD 3.2.4 which does not support shared libs,
183 ## uncomment the next two lines:
184 #ldflags="-static"
185 #so='none'
ef0c9946 186
187 # In addition, on some systems there is a problem with perl and NDBM
f443a56e 188 # which causes AnyDBM and NDBM_File to lock up. This is evidenced
189 # in the tests as AnyDBM just freezing. Apparently, this only
ef0c9946 190 # happens on a.out systems, so we disable NDBM for all a.out linux
191 # systems. If someone can suggest a more robust test
192 # that would be appreciated.
193 #
194 # More info:
195 # Date: Wed, 7 Feb 1996 03:21:04 +0900
196 # From: Jeffrey Friedl <jfriedl@nff.ncl.omron.co.jp>
197 #
198 # I tried compiling with DBM support and sure enough things locked up
199 # just as advertised. Checking into it, I found that the lockup was
200 # during the call to dbm_open. Not *in* dbm_open -- but between the call
201 # to and the jump into.
f443a56e 202 #
ef0c9946 203 # To make a long story short, making sure that the *.a and *.sa pairs of
204 # /usr/lib/lib{m,db,gdbm}.{a,sa}
205 # were perfectly in sync took care of it.
206 #
207 # This will generate a harmless Whoa There! message
208 case "$d_dbm_open" in
209 '') cat <<'EOM' >&4
210
211Disabling ndbm. This will generate a Whoa There message in Configure.
212Read hints/linux.sh for further information.
213EOM
214 # You can override this with Configure -Dd_dbm_open
215 d_dbm_open=undef
216 ;;
217 esac
232e078e 218fi
a0d0e21e 219
c2960299 220rm -f try.c a.out
16d20bd9 221
e218ce4d 222if /bin/sh -c exit; then
284c50cc 223 echo ''
224 echo 'You appear to have a working bash. Good.'
c2960299 225else
ef0c9946 226 cat << 'EOM' >&4
a0d0e21e 227
ef0c9946 228*********************** Warning! *********************
229It would appear you have a defective bash shell installed. This is likely to
230give you a failure of op/exec test #5 during the test phase of the build,
231Upgrading to a recent version (1.14.4 or later) should fix the problem.
232******************************************************
a0d0e21e 233EOM
c2960299 234
235fi
16d20bd9 236
284c50cc 237# On SPARClinux,
238# The following csh consistently coredumped in the test directory
239# "/home/mikedlr/perl5.003_94/t", though not most other directories.
240
241#Name : csh Distribution: Red Hat Linux (Rembrandt)
242#Version : 5.2.6 Vendor: Red Hat Software
243#Release : 3 Build Date: Fri May 24 19:42:14 1996
244#Install date: Thu Jul 11 16:20:14 1996 Build Host: itchy.redhat.com
245#Group : Shells Source RPM: csh-5.2.6-3.src.rpm
246#Size : 184417
247#Description : BSD c-shell
248
249# For this reason I suggest using the much bug-fixed tcsh for globbing
250# where available.
251
3d413b55 252# November 2001: That warning's pretty old now and probably not so
253# relevant, especially since perl now uses File::Glob for globbing.
254# We'll still look for tcsh, but tone down the warnings.
255# Andy Dougherty, Nov. 6, 2001
256if $csh -c 'echo $version' >/dev/null 2>&1; then
257 echo 'Your csh is really tcsh. Good.'
258else
99cae59c 259 if xxx=`./UU/loc tcsh blurfl $pth`; $test -f "$xxx"; then
46fc3d4c 260 echo "Found tcsh. I'll use it for globbing."
261 # We can't change Configure's setting of $csh, due to the way
262 # Configure handles $d_portable and commands found in $loclist.
263 # We can set the value for CSH in config.h by setting full_csh.
264 full_csh=$xxx
3d413b55 265 elif [ -f "$csh" ]; then
266 echo "Couldn't find tcsh. Csh-based globbing might be broken."
46fc3d4c 267 fi
284c50cc 268fi
dc66995c 269
92526645 270# Shimpei Yamashita <shimpei@socrates.patnet.caltech.edu>
271# Message-Id: <33EF1634.B36B6500@pobox.com>
f443a56e 272#
17ff8a05 273# The DR2 of MkLinux (osname=linux,archname=ppc-linux) may need
274# special flags passed in order for dynamic loading to work.
92526645 275# instead of the recommended:
17ff8a05 276#
92526645 277# ccdlflags='-rdynamic'
f443a56e 278#
92526645 279# it should be:
280# ccdlflags='-Wl,-E'
17ff8a05 281#
282# So if your DR2 (DR3 came out summer 1998, consider upgrading)
283# has problems with dynamic loading, uncomment the
284# following three lines, make distclean, and re-Configure:
285#case "`uname -r | sed 's/^[0-9.-]*//'``arch`" in
286#'osfmach3ppc') ccdlflags='-Wl,-E' ;;
287#esac
92526645 288
f6527d0e 289case "`uname -m`" in
290sparc*)
7cd1f58a 291 case "$cccdlflags" in
292 *-fpic*) cccdlflags="`echo $cccdlflags|sed 's/-fpic/-fPIC/'`" ;;
4cd66402 293 *-fPIC*) ;;
7cd1f58a 294 *) cccdlflags="$cccdlflags -fPIC" ;;
295 esac
296 ;;
297esac
298
f443a56e 299# SuSE8.2 has /usr/lib/libndbm* which are ld scripts rather than
300# true libraries. The scripts cause binding against static
301# version of -lgdbm which is a bad idea. So if we have 'nm'
302# make sure it can read the file
303# NI-S 2003/08/07
304if [ -r /usr/lib/libndbm.so -a -x /usr/bin/nm ] ; then
305 if /usr/bin/nm /usr/lib/libndbm.so >/dev/null 2>&1 ; then
306 echo 'Your shared -lndbm seems to be a real library.'
307 else
308 echo 'Your shared -lndbm is not a real library.'
309 set `echo X "$libswanted "| sed -e 's/ ndbm / /'`
310 shift
311 libswanted="$*"
312 fi
313fi
314
315
316# This script UU/usethreads.cbu will get 'called-back' by Configure
104d25b7 317# after it has prompted the user for whether to use threads.
318cat > UU/usethreads.cbu <<'EOCBU'
bb47c233 319if getconf GNU_LIBPTHREAD_VERSION | grep NPTL >/dev/null 2>/dev/null
320then
321 threadshavepids=""
322else
323 threadshavepids="-DTHREADS_HAVE_PIDS"
324fi
104d25b7 325case "$usethreads" in
326$define|true|[yY]*)
bb47c233 327 ccflags="-D_REENTRANT -D_GNU_SOURCE $threadshavepids $ccflags"
5d3df70f 328 if echo $libswanted | grep -v pthread >/dev/null
329 then
330 set `echo X "$libswanted "| sed -e 's/ c / pthread c /'`
331 shift
332 libswanted="$*"
333 fi
47b8d1e2 334
a48ec845 335 # Somehow at least in Debian 2.2 these manage to escape
336 # the #define forest of <features.h> and <time.h> so that
c95a4480 337 # the hasproto macro of Configure doesn't see these protos,
338 # even with the -D_GNU_SOURCE.
47b8d1e2 339
a48ec845 340 d_asctime_r_proto="$define"
47b8d1e2 341 d_crypt_r_proto="$define"
a48ec845 342 d_ctime_r_proto="$define"
343 d_gmtime_r_proto="$define"
344 d_localtime_r_proto="$define"
01b53dac 345 d_random_r_proto="$define"
47b8d1e2 346
104d25b7 347 ;;
348esac
349EOCBU
7f2eea8e 350
351cat > UU/uselargefiles.cbu <<'EOCBU'
f443a56e 352# This script UU/uselargefiles.cbu will get 'called-back' by Configure
7f2eea8e 353# after it has prompted the user for whether to use large files.
354case "$uselargefiles" in
355''|$define|true|[yY]*)
9422c00b 356# Keep this in the left margin.
45c9e83b 357ccflags_uselargefiles="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
9422c00b 358
45c9e83b 359 ccflags="$ccflags $ccflags_uselargefiles"
7f2eea8e 360 ;;
361esac
362EOCBU
3fe280b7 363
364# Purify fails to link Perl if a "-lc" is passed into its linker
365# due to duplicate symbols.
366case "$PURIFY" in
367$define|true|[yY]*)
368 set `echo X "$libswanted "| sed -e 's/ c / /'`
369 shift
370 libswanted="$*"
371 ;;
372esac
b1e55cab 373
374# If we are using g++ we must use nm and force ourselves to use
375# the /usr/lib/libc.a (resetting the libc below to an empty string
376# makes Configure to look for the right one) because the symbol
377# scanning tricks of Configure will crash and burn horribly.
378case "$cc" in
379*g++*) usenm=true
380 libc=''
381 ;;
382esac
383
c3faea48 384# If using g++, the Configure scan for dlopen() and (especially)
385# dlerror() might fail, easier just to forcibly hint them in.
386case "$cc" in
387*g++*)
388 d_dlopen='define'
389 d_dlerror='define'
390 ;;
391esac
5d3df70f 392
393# Under some circumstances libdb can get built in such a way as to
394# need pthread explicitly linked.
395
396libdb_needs_pthread="N"
397
398if echo " $libswanted " | grep -v " pthread " >/dev/null
399then
400 if echo " $libswanted " | grep " db " >/dev/null
401 then
402 for DBDIR in $glibpth
403 do
404 DBLIB="$DBDIR/libdb.so"
405 if [ -f $DBLIB ]
406 then
407 if nm -u $DBLIB | grep pthread >/dev/null
408 then
409 if ldd $DBLIB | grep pthread >/dev/null
410 then
411 libdb_needs_pthread="N"
412 else
413 libdb_needs_pthread="Y"
414 fi
415 fi
416 fi
417 done
418 fi
419fi
420
421case "$libdb_needs_pthread" in
422 "Y")
423 libswanted="$libswanted pthread"
424 ;;
425esac