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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
dca46f05 16# NDBM support for ELF re-enabled 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 "`${cc:-cc} -V 2>&1`" in
87d05bbe 89*"Intel(R) C++ Compiler"*|*"Intel(R) C Compiler"*)
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90 # record the version, formats:
91 # icc (ICC) 10.1 20080801
92 # icpc (ICC) 10.1 20080801
93 # followed by a copyright on the second line
94 ccversion=`${cc:-cc} --version | sed -n -e 's/^icp\?c \((ICC) \)\?//p'`
06d57135 95 # This is needed for Configure's prototype checks to work correctly
383f9357 96 # The -mp flag is needed to pass various floating point related tests
6ae709ad 97 # The -no-gcc flag is needed otherwise, icc pretends (poorly) to be gcc
383f9357 98 ccflags="-we147 -mp -no-gcc $ccflags"
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99 # Prevent relocation errors on 64bits arch
100 case "`uname -m`" in
101 *ia64*|*x86_64*)
102 cccdlflags='-fPIC'
103 ;;
104 esac
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105 # If we're using ICC, we usually want the best performance
106 case "$optimize" in
107 '') optimize='-O3' ;;
108 esac
109 ;;
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110*" Sun "*"C"*)
111 # Sun's C compiler, which might have a 'tag' name between
112 # 'Sun' and the 'C': Examples:
113 # cc: Sun C 5.9 Linux_i386 Patch 124871-01 2007/07/31
114 # cc: Sun Ceres C 5.10 Linux_i386 2008/07/10
395ff119 115 test "$optimize" || optimize='-xO2'
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116 cccdlflags='-KPIC'
117 lddlflags='-G -Bdynamic'
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118 # Sun C doesn't support gcc attributes, but, in many cases, doesn't
119 # complain either. Not all cases, though.
120 d_attribute_format='undef'
121 d_attribute_malloc='undef'
122 d_attribute_nonnull='undef'
123 d_attribute_noreturn='undef'
124 d_attribute_pure='undef'
125 d_attribute_unused='undef'
126 d_attribute_warn_unused_result='undef'
6452e86c 127 ;;
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128esac
129
1aef975c 130case "$optimize" in
051e4fe1 131# use -O2 by default ; -O3 doesn't seem to bring significant benefits with gcc
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132'')
133 optimize='-O2'
134 case "`uname -m`" in
135 ppc*)
136 # on ppc, it seems that gcc (at least gcc 3.3.2) isn't happy
f88ad257 137 # with -O2 ; so downgrade to -O1.
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138 optimize='-O1'
139 ;;
f88ad257
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140 ia64*)
141 # This architecture has had various problems with gcc's
142 # in the 3.2, 3.3, and 3.4 releases when optimized to -O2. See
143 # RT #37156 for a discussion of the problem.
144 case "`${cc:-gcc} -v 2>&1`" in
145 *"version 3.2"*|*"version 3.3"*|*"version 3.4"*)
146 ccflags="-fno-delete-null-pointer-checks $ccflags"
147 ;;
148 esac
149 ;;
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150 esac
151 ;;
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152esac
153
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154# Are we using ELF? Thanks to Kenneth Albanowski <kjahds@kjahds.com>
155# for this test.
156cat >try.c <<'EOM'
157/* Test for whether ELF binaries are produced */
158#include <fcntl.h>
159#include <stdlib.h>
b1e55cab 160#include <unistd.h>
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161main() {
162 char buffer[4];
163 int i=open("a.out",O_RDONLY);
164 if(i==-1)
165 exit(1); /* fail */
166 if(read(i,&buffer[0],4)<4)
167 exit(1); /* fail */
168 if(buffer[0] != 127 || buffer[1] != 'E' ||
169 buffer[2] != 'L' || buffer[3] != 'F')
170 exit(1); /* fail */
171 exit(0); /* succeed (yes, it's ELF) */
172}
173EOM
5440bc8e 174if ${cc:-gcc} try.c >/dev/null 2>&1 && $run ./a.out; then
ef0c9946 175 cat <<'EOM' >&4
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176
177You appear to have ELF support. I'll try to use it for dynamic loading.
ef0c9946 178If dynamic loading doesn't work, read hints/linux.sh for further information.
232e078e 179EOM
ef0c9946 180
232e078e 181else
ef0c9946 182 cat <<'EOM' >&4
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183
184You don't have an ELF gcc. I will use dld if possible. If you are
185using a version of DLD earlier than 3.2.6, or don't have it at all, you
186should probably upgrade. If you are forced to use 3.2.4, you should
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187uncomment a couple of lines in hints/linux.sh and restart Configure so
188that shared libraries will be disallowed.
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189
190EOM
232e078e 191 lddlflags="-r $lddlflags"
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192 # These empty values are so that Configure doesn't put in the
193 # Linux ELF values.
194 ccdlflags=' '
195 cccdlflags=' '
c07a80fd 196 ccflags="-DOVR_DBL_DIG=14 $ccflags"
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197 so='sa'
198 dlext='o'
a5f75d66 199 nm_so_opt=' '
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200 ## If you are using DLD 3.2.4 which does not support shared libs,
201 ## uncomment the next two lines:
202 #ldflags="-static"
203 #so='none'
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204
205 # In addition, on some systems there is a problem with perl and NDBM
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206 # which causes AnyDBM and NDBM_File to lock up. This is evidenced
207 # in the tests as AnyDBM just freezing. Apparently, this only
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208 # happens on a.out systems, so we disable NDBM for all a.out linux
209 # systems. If someone can suggest a more robust test
210 # that would be appreciated.
211 #
212 # More info:
213 # Date: Wed, 7 Feb 1996 03:21:04 +0900
214 # From: Jeffrey Friedl <jfriedl@nff.ncl.omron.co.jp>
215 #
216 # I tried compiling with DBM support and sure enough things locked up
217 # just as advertised. Checking into it, I found that the lockup was
218 # during the call to dbm_open. Not *in* dbm_open -- but between the call
219 # to and the jump into.
f443a56e 220 #
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221 # To make a long story short, making sure that the *.a and *.sa pairs of
222 # /usr/lib/lib{m,db,gdbm}.{a,sa}
223 # were perfectly in sync took care of it.
224 #
225 # This will generate a harmless Whoa There! message
226 case "$d_dbm_open" in
227 '') cat <<'EOM' >&4
228
229Disabling ndbm. This will generate a Whoa There message in Configure.
230Read hints/linux.sh for further information.
231EOM
232 # You can override this with Configure -Dd_dbm_open
233 d_dbm_open=undef
234 ;;
235 esac
232e078e 236fi
a0d0e21e 237
c2960299 238rm -f try.c a.out
16d20bd9 239
e218ce4d 240if /bin/sh -c exit; then
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241 echo ''
242 echo 'You appear to have a working bash. Good.'
c2960299 243else
ef0c9946 244 cat << 'EOM' >&4
a0d0e21e 245
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246*********************** Warning! *********************
247It would appear you have a defective bash shell installed. This is likely to
248give you a failure of op/exec test #5 during the test phase of the build,
249Upgrading to a recent version (1.14.4 or later) should fix the problem.
250******************************************************
a0d0e21e 251EOM
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252
253fi
16d20bd9 254
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255# On SPARClinux,
256# The following csh consistently coredumped in the test directory
257# "/home/mikedlr/perl5.003_94/t", though not most other directories.
258
259#Name : csh Distribution: Red Hat Linux (Rembrandt)
260#Version : 5.2.6 Vendor: Red Hat Software
261#Release : 3 Build Date: Fri May 24 19:42:14 1996
262#Install date: Thu Jul 11 16:20:14 1996 Build Host: itchy.redhat.com
263#Group : Shells Source RPM: csh-5.2.6-3.src.rpm
264#Size : 184417
265#Description : BSD c-shell
266
267# For this reason I suggest using the much bug-fixed tcsh for globbing
268# where available.
269
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270# November 2001: That warning's pretty old now and probably not so
271# relevant, especially since perl now uses File::Glob for globbing.
272# We'll still look for tcsh, but tone down the warnings.
273# Andy Dougherty, Nov. 6, 2001
274if $csh -c 'echo $version' >/dev/null 2>&1; then
275 echo 'Your csh is really tcsh. Good.'
276else
99cae59c 277 if xxx=`./UU/loc tcsh blurfl $pth`; $test -f "$xxx"; then
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278 echo "Found tcsh. I'll use it for globbing."
279 # We can't change Configure's setting of $csh, due to the way
280 # Configure handles $d_portable and commands found in $loclist.
281 # We can set the value for CSH in config.h by setting full_csh.
282 full_csh=$xxx
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JH
283 elif [ -f "$csh" ]; then
284 echo "Couldn't find tcsh. Csh-based globbing might be broken."
46fc3d4c 285 fi
284c50cc 286fi
dc66995c 287
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288# Shimpei Yamashita <shimpei@socrates.patnet.caltech.edu>
289# Message-Id: <33EF1634.B36B6500@pobox.com>
f443a56e 290#
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291# The DR2 of MkLinux (osname=linux,archname=ppc-linux) may need
292# special flags passed in order for dynamic loading to work.
92526645 293# instead of the recommended:
17ff8a05 294#
92526645 295# ccdlflags='-rdynamic'
f443a56e 296#
92526645
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297# it should be:
298# ccdlflags='-Wl,-E'
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299#
300# So if your DR2 (DR3 came out summer 1998, consider upgrading)
301# has problems with dynamic loading, uncomment the
302# following three lines, make distclean, and re-Configure:
303#case "`uname -r | sed 's/^[0-9.-]*//'``arch`" in
304#'osfmach3ppc') ccdlflags='-Wl,-E' ;;
305#esac
92526645 306
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307case "`uname -m`" in
308sparc*)
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309 case "$cccdlflags" in
310 *-fpic*) cccdlflags="`echo $cccdlflags|sed 's/-fpic/-fPIC/'`" ;;
4cd66402 311 *-fPIC*) ;;
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312 *) cccdlflags="$cccdlflags -fPIC" ;;
313 esac
314 ;;
315esac
316
f443a56e
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317# SuSE8.2 has /usr/lib/libndbm* which are ld scripts rather than
318# true libraries. The scripts cause binding against static
319# version of -lgdbm which is a bad idea. So if we have 'nm'
320# make sure it can read the file
321# NI-S 2003/08/07
322if [ -r /usr/lib/libndbm.so -a -x /usr/bin/nm ] ; then
323 if /usr/bin/nm /usr/lib/libndbm.so >/dev/null 2>&1 ; then
324 echo 'Your shared -lndbm seems to be a real library.'
325 else
326 echo 'Your shared -lndbm is not a real library.'
327 set `echo X "$libswanted "| sed -e 's/ ndbm / /'`
328 shift
329 libswanted="$*"
330 fi
331fi
332
333
334# This script UU/usethreads.cbu will get 'called-back' by Configure
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335# after it has prompted the user for whether to use threads.
336cat > UU/usethreads.cbu <<'EOCBU'
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337if getconf GNU_LIBPTHREAD_VERSION | grep NPTL >/dev/null 2>/dev/null
338then
339 threadshavepids=""
340else
341 threadshavepids="-DTHREADS_HAVE_PIDS"
342fi
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343case "$usethreads" in
344$define|true|[yY]*)
bb47c233 345 ccflags="-D_REENTRANT -D_GNU_SOURCE $threadshavepids $ccflags"
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346 if echo $libswanted | grep -v pthread >/dev/null
347 then
348 set `echo X "$libswanted "| sed -e 's/ c / pthread c /'`
349 shift
350 libswanted="$*"
351 fi
47b8d1e2 352
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353 # Somehow at least in Debian 2.2 these manage to escape
354 # the #define forest of <features.h> and <time.h> so that
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355 # the hasproto macro of Configure doesn't see these protos,
356 # even with the -D_GNU_SOURCE.
47b8d1e2 357
a48ec845 358 d_asctime_r_proto="$define"
47b8d1e2 359 d_crypt_r_proto="$define"
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360 d_ctime_r_proto="$define"
361 d_gmtime_r_proto="$define"
362 d_localtime_r_proto="$define"
01b53dac 363 d_random_r_proto="$define"
47b8d1e2 364
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365 ;;
366esac
367EOCBU
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368
369cat > UU/uselargefiles.cbu <<'EOCBU'
f443a56e 370# This script UU/uselargefiles.cbu will get 'called-back' by Configure
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371# after it has prompted the user for whether to use large files.
372case "$uselargefiles" in
373''|$define|true|[yY]*)
9422c00b 374# Keep this in the left margin.
45c9e83b 375ccflags_uselargefiles="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
9422c00b 376
45c9e83b 377 ccflags="$ccflags $ccflags_uselargefiles"
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378 ;;
379esac
380EOCBU
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381
382# Purify fails to link Perl if a "-lc" is passed into its linker
383# due to duplicate symbols.
384case "$PURIFY" in
385$define|true|[yY]*)
386 set `echo X "$libswanted "| sed -e 's/ c / /'`
387 shift
388 libswanted="$*"
389 ;;
390esac
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JH
391
392# If we are using g++ we must use nm and force ourselves to use
393# the /usr/lib/libc.a (resetting the libc below to an empty string
394# makes Configure to look for the right one) because the symbol
395# scanning tricks of Configure will crash and burn horribly.
396case "$cc" in
397*g++*) usenm=true
398 libc=''
399 ;;
400esac
401
c3faea48
JH
402# If using g++, the Configure scan for dlopen() and (especially)
403# dlerror() might fail, easier just to forcibly hint them in.
404case "$cc" in
405*g++*)
406 d_dlopen='define'
407 d_dlerror='define'
408 ;;
409esac
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410
411# Under some circumstances libdb can get built in such a way as to
412# need pthread explicitly linked.
413
414libdb_needs_pthread="N"
415
416if echo " $libswanted " | grep -v " pthread " >/dev/null
417then
418 if echo " $libswanted " | grep " db " >/dev/null
419 then
420 for DBDIR in $glibpth
421 do
422 DBLIB="$DBDIR/libdb.so"
423 if [ -f $DBLIB ]
424 then
425 if nm -u $DBLIB | grep pthread >/dev/null
426 then
427 if ldd $DBLIB | grep pthread >/dev/null
428 then
429 libdb_needs_pthread="N"
430 else
431 libdb_needs_pthread="Y"
432 fi
433 fi
434 fi
435 done
436 fi
437fi
438
439case "$libdb_needs_pthread" in
440 "Y")
441 libswanted="$libswanted pthread"
442 ;;
443esac