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Various patches added to RT #21568 from julian@mehnle.net.
[perl5.git] / hints / linux.sh
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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.
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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
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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
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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 "$libswanted "| sed -e 's/ bsd / /' -e 's/ net / /' -e 's/ bind / /'`
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54shift
55libswanted="$*"
1fc4cb55 56
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57# Debian 4.0 puts ndbm in the -lgdbm_compat library.
58libswanted="$libswanted gdbm_compat"
59
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60# If you have glibc, then report the version for ./myconfig bug reporting.
61# (Configure doesn't need to know the specific version since it just uses
62# gcc to load the library for all tests.)
f443a56e 63# We don't use __GLIBC__ and __GLIBC_MINOR__ because they
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64# are insufficiently precise to distinguish things like
65# libc-2.0.6 and libc-2.0.7.
66if test -L /lib/libc.so.6; then
67 libc=`ls -l /lib/libc.so.6 | awk '{print $NF}'`
68 libc=/lib/$libc
69fi
70
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71# Configure may fail to find lstat() since it's a static/inline
72# function in <sys/stat.h>.
73d_lstat=define
1aef975c 74
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75# malloc wrap works
76case "$usemallocwrap" in
77'') usemallocwrap='define' ;;
78esac
79
f443a56e 80# The system malloc() is about as fast and as frugal as perl's.
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81# Since the system malloc() has been the default since at least
82# 5.001, we might as well leave it that way. --AD 10 Jan 2002
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83case "$usemymalloc" in
84'') usemymalloc='n' ;;
85esac
1aef975c 86
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87# Check if we're about to use Intel's ICC compiler
88case "`${cc:-cc} -V 2>&1`" in
87d05bbe 89*"Intel(R) C++ Compiler"*|*"Intel(R) C Compiler"*)
06d57135 90 # This is needed for Configure's prototype checks to work correctly
383f9357 91 # The -mp flag is needed to pass various floating point related tests
6ae709ad 92 # The -no-gcc flag is needed otherwise, icc pretends (poorly) to be gcc
383f9357 93 ccflags="-we147 -mp -no-gcc $ccflags"
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94 # Prevent relocation errors on 64bits arch
95 case "`uname -m`" in
96 *ia64*|*x86_64*)
97 cccdlflags='-fPIC'
98 ;;
99 esac
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100 # If we're using ICC, we usually want the best performance
101 case "$optimize" in
102 '') optimize='-O3' ;;
103 esac
104 ;;
6452e86c 105*"Sun C"*)
395ff119 106 test "$optimize" || optimize='-xO2'
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107 cccdlflags='-KPIC'
108 lddlflags='-G -Bdynamic'
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109 # Sun C doesn't support gcc attributes, but, in many cases, doesn't
110 # complain either. Not all cases, though.
111 d_attribute_format='undef'
112 d_attribute_malloc='undef'
113 d_attribute_nonnull='undef'
114 d_attribute_noreturn='undef'
115 d_attribute_pure='undef'
116 d_attribute_unused='undef'
117 d_attribute_warn_unused_result='undef'
6452e86c 118 ;;
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119esac
120
1aef975c 121case "$optimize" in
051e4fe1 122# use -O2 by default ; -O3 doesn't seem to bring significant benefits with gcc
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123'')
124 optimize='-O2'
125 case "`uname -m`" in
126 ppc*)
127 # on ppc, it seems that gcc (at least gcc 3.3.2) isn't happy
f88ad257 128 # with -O2 ; so downgrade to -O1.
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129 optimize='-O1'
130 ;;
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131 ia64*)
132 # This architecture has had various problems with gcc's
133 # in the 3.2, 3.3, and 3.4 releases when optimized to -O2. See
134 # RT #37156 for a discussion of the problem.
135 case "`${cc:-gcc} -v 2>&1`" in
136 *"version 3.2"*|*"version 3.3"*|*"version 3.4"*)
137 ccflags="-fno-delete-null-pointer-checks $ccflags"
138 ;;
139 esac
140 ;;
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141 esac
142 ;;
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143esac
144
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145# Are we using ELF? Thanks to Kenneth Albanowski <kjahds@kjahds.com>
146# for this test.
147cat >try.c <<'EOM'
148/* Test for whether ELF binaries are produced */
149#include <fcntl.h>
150#include <stdlib.h>
b1e55cab 151#include <unistd.h>
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152main() {
153 char buffer[4];
154 int i=open("a.out",O_RDONLY);
155 if(i==-1)
156 exit(1); /* fail */
157 if(read(i,&buffer[0],4)<4)
158 exit(1); /* fail */
159 if(buffer[0] != 127 || buffer[1] != 'E' ||
160 buffer[2] != 'L' || buffer[3] != 'F')
161 exit(1); /* fail */
162 exit(0); /* succeed (yes, it's ELF) */
163}
164EOM
5440bc8e 165if ${cc:-gcc} try.c >/dev/null 2>&1 && $run ./a.out; then
ef0c9946 166 cat <<'EOM' >&4
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167
168You appear to have ELF support. I'll try to use it for dynamic loading.
ef0c9946 169If dynamic loading doesn't work, read hints/linux.sh for further information.
232e078e 170EOM
ef0c9946 171
232e078e 172else
ef0c9946 173 cat <<'EOM' >&4
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174
175You don't have an ELF gcc. I will use dld if possible. If you are
176using a version of DLD earlier than 3.2.6, or don't have it at all, you
177should probably upgrade. If you are forced to use 3.2.4, you should
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178uncomment a couple of lines in hints/linux.sh and restart Configure so
179that shared libraries will be disallowed.
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180
181EOM
232e078e 182 lddlflags="-r $lddlflags"
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183 # These empty values are so that Configure doesn't put in the
184 # Linux ELF values.
185 ccdlflags=' '
186 cccdlflags=' '
c07a80fd 187 ccflags="-DOVR_DBL_DIG=14 $ccflags"
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188 so='sa'
189 dlext='o'
a5f75d66 190 nm_so_opt=' '
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191 ## If you are using DLD 3.2.4 which does not support shared libs,
192 ## uncomment the next two lines:
193 #ldflags="-static"
194 #so='none'
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195
196 # In addition, on some systems there is a problem with perl and NDBM
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197 # which causes AnyDBM and NDBM_File to lock up. This is evidenced
198 # in the tests as AnyDBM just freezing. Apparently, this only
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199 # happens on a.out systems, so we disable NDBM for all a.out linux
200 # systems. If someone can suggest a more robust test
201 # that would be appreciated.
202 #
203 # More info:
204 # Date: Wed, 7 Feb 1996 03:21:04 +0900
205 # From: Jeffrey Friedl <jfriedl@nff.ncl.omron.co.jp>
206 #
207 # I tried compiling with DBM support and sure enough things locked up
208 # just as advertised. Checking into it, I found that the lockup was
209 # during the call to dbm_open. Not *in* dbm_open -- but between the call
210 # to and the jump into.
f443a56e 211 #
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212 # To make a long story short, making sure that the *.a and *.sa pairs of
213 # /usr/lib/lib{m,db,gdbm}.{a,sa}
214 # were perfectly in sync took care of it.
215 #
216 # This will generate a harmless Whoa There! message
217 case "$d_dbm_open" in
218 '') cat <<'EOM' >&4
219
220Disabling ndbm. This will generate a Whoa There message in Configure.
221Read hints/linux.sh for further information.
222EOM
223 # You can override this with Configure -Dd_dbm_open
224 d_dbm_open=undef
225 ;;
226 esac
232e078e 227fi
a0d0e21e 228
c2960299 229rm -f try.c a.out
16d20bd9 230
e218ce4d 231if /bin/sh -c exit; then
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232 echo ''
233 echo 'You appear to have a working bash. Good.'
c2960299 234else
ef0c9946 235 cat << 'EOM' >&4
a0d0e21e 236
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237*********************** Warning! *********************
238It would appear you have a defective bash shell installed. This is likely to
239give you a failure of op/exec test #5 during the test phase of the build,
240Upgrading to a recent version (1.14.4 or later) should fix the problem.
241******************************************************
a0d0e21e 242EOM
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243
244fi
16d20bd9 245
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246# On SPARClinux,
247# The following csh consistently coredumped in the test directory
248# "/home/mikedlr/perl5.003_94/t", though not most other directories.
249
250#Name : csh Distribution: Red Hat Linux (Rembrandt)
251#Version : 5.2.6 Vendor: Red Hat Software
252#Release : 3 Build Date: Fri May 24 19:42:14 1996
253#Install date: Thu Jul 11 16:20:14 1996 Build Host: itchy.redhat.com
254#Group : Shells Source RPM: csh-5.2.6-3.src.rpm
255#Size : 184417
256#Description : BSD c-shell
257
258# For this reason I suggest using the much bug-fixed tcsh for globbing
259# where available.
260
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261# November 2001: That warning's pretty old now and probably not so
262# relevant, especially since perl now uses File::Glob for globbing.
263# We'll still look for tcsh, but tone down the warnings.
264# Andy Dougherty, Nov. 6, 2001
265if $csh -c 'echo $version' >/dev/null 2>&1; then
266 echo 'Your csh is really tcsh. Good.'
267else
99cae59c 268 if xxx=`./UU/loc tcsh blurfl $pth`; $test -f "$xxx"; then
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269 echo "Found tcsh. I'll use it for globbing."
270 # We can't change Configure's setting of $csh, due to the way
271 # Configure handles $d_portable and commands found in $loclist.
272 # We can set the value for CSH in config.h by setting full_csh.
273 full_csh=$xxx
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274 elif [ -f "$csh" ]; then
275 echo "Couldn't find tcsh. Csh-based globbing might be broken."
46fc3d4c 276 fi
284c50cc 277fi
dc66995c 278
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279# Shimpei Yamashita <shimpei@socrates.patnet.caltech.edu>
280# Message-Id: <33EF1634.B36B6500@pobox.com>
f443a56e 281#
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282# The DR2 of MkLinux (osname=linux,archname=ppc-linux) may need
283# special flags passed in order for dynamic loading to work.
92526645 284# instead of the recommended:
17ff8a05 285#
92526645 286# ccdlflags='-rdynamic'
f443a56e 287#
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288# it should be:
289# ccdlflags='-Wl,-E'
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290#
291# So if your DR2 (DR3 came out summer 1998, consider upgrading)
292# has problems with dynamic loading, uncomment the
293# following three lines, make distclean, and re-Configure:
294#case "`uname -r | sed 's/^[0-9.-]*//'``arch`" in
295#'osfmach3ppc') ccdlflags='-Wl,-E' ;;
296#esac
92526645 297
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298case "`uname -m`" in
299sparc*)
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300 case "$cccdlflags" in
301 *-fpic*) cccdlflags="`echo $cccdlflags|sed 's/-fpic/-fPIC/'`" ;;
4cd66402 302 *-fPIC*) ;;
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303 *) cccdlflags="$cccdlflags -fPIC" ;;
304 esac
305 ;;
306esac
307
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308# SuSE8.2 has /usr/lib/libndbm* which are ld scripts rather than
309# true libraries. The scripts cause binding against static
310# version of -lgdbm which is a bad idea. So if we have 'nm'
311# make sure it can read the file
312# NI-S 2003/08/07
313if [ -r /usr/lib/libndbm.so -a -x /usr/bin/nm ] ; then
314 if /usr/bin/nm /usr/lib/libndbm.so >/dev/null 2>&1 ; then
315 echo 'Your shared -lndbm seems to be a real library.'
316 else
317 echo 'Your shared -lndbm is not a real library.'
318 set `echo X "$libswanted "| sed -e 's/ ndbm / /'`
319 shift
320 libswanted="$*"
321 fi
322fi
323
324
325# This script UU/usethreads.cbu will get 'called-back' by Configure
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326# after it has prompted the user for whether to use threads.
327cat > UU/usethreads.cbu <<'EOCBU'
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328if getconf GNU_LIBPTHREAD_VERSION | grep NPTL >/dev/null 2>/dev/null
329then
330 threadshavepids=""
331else
332 threadshavepids="-DTHREADS_HAVE_PIDS"
333fi
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334case "$usethreads" in
335$define|true|[yY]*)
bb47c233 336 ccflags="-D_REENTRANT -D_GNU_SOURCE $threadshavepids $ccflags"
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337 if echo $libswanted | grep -v pthread >/dev/null
338 then
339 set `echo X "$libswanted "| sed -e 's/ c / pthread c /'`
340 shift
341 libswanted="$*"
342 fi
47b8d1e2 343
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344 # Somehow at least in Debian 2.2 these manage to escape
345 # the #define forest of <features.h> and <time.h> so that
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346 # the hasproto macro of Configure doesn't see these protos,
347 # even with the -D_GNU_SOURCE.
47b8d1e2 348
a48ec845 349 d_asctime_r_proto="$define"
47b8d1e2 350 d_crypt_r_proto="$define"
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351 d_ctime_r_proto="$define"
352 d_gmtime_r_proto="$define"
353 d_localtime_r_proto="$define"
01b53dac 354 d_random_r_proto="$define"
47b8d1e2 355
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356 ;;
357esac
358EOCBU
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359
360cat > UU/uselargefiles.cbu <<'EOCBU'
f443a56e 361# This script UU/uselargefiles.cbu will get 'called-back' by Configure
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362# after it has prompted the user for whether to use large files.
363case "$uselargefiles" in
364''|$define|true|[yY]*)
9422c00b 365# Keep this in the left margin.
45c9e83b 366ccflags_uselargefiles="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
9422c00b 367
45c9e83b 368 ccflags="$ccflags $ccflags_uselargefiles"
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369 ;;
370esac
371EOCBU
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372
373# Purify fails to link Perl if a "-lc" is passed into its linker
374# due to duplicate symbols.
375case "$PURIFY" in
376$define|true|[yY]*)
377 set `echo X "$libswanted "| sed -e 's/ c / /'`
378 shift
379 libswanted="$*"
380 ;;
381esac
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382
383# If we are using g++ we must use nm and force ourselves to use
384# the /usr/lib/libc.a (resetting the libc below to an empty string
385# makes Configure to look for the right one) because the symbol
386# scanning tricks of Configure will crash and burn horribly.
387case "$cc" in
388*g++*) usenm=true
389 libc=''
390 ;;
391esac
392
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393# If using g++, the Configure scan for dlopen() and (especially)
394# dlerror() might fail, easier just to forcibly hint them in.
395case "$cc" in
396*g++*)
397 d_dlopen='define'
398 d_dlerror='define'
399 ;;
400esac
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401
402# Under some circumstances libdb can get built in such a way as to
403# need pthread explicitly linked.
404
405libdb_needs_pthread="N"
406
407if echo " $libswanted " | grep -v " pthread " >/dev/null
408then
409 if echo " $libswanted " | grep " db " >/dev/null
410 then
411 for DBDIR in $glibpth
412 do
413 DBLIB="$DBDIR/libdb.so"
414 if [ -f $DBLIB ]
415 then
416 if nm -u $DBLIB | grep pthread >/dev/null
417 then
418 if ldd $DBLIB | grep pthread >/dev/null
419 then
420 libdb_needs_pthread="N"
421 else
422 libdb_needs_pthread="Y"
423 fi
424 fi
425 fi
426 done
427 fi
428fi
429
430case "$libdb_needs_pthread" in
431 "Y")
432 libswanted="$libswanted pthread"
433 ;;
434esac