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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
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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
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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
f3db1d4d
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18# No version of Linux supports setuid scripts.
19d_suidsafe='undef'
f3db1d4d 20
5aa2cbff
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21# No version of Linux needs libutil for perl.
22i_libutil='undef'
23
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24# Debian and Red Hat, and perhaps other vendors, provide both runtime and
25# development packages for some libraries. The runtime packages contain shared
26# libraries with version information in their names (e.g., libgdbm.so.1.7.3);
27# the development packages supplement this with versionless shared libraries
28# (e.g., libgdbm.so).
29#
30# If you want to link against such a library, you must install the development
31# version of the package.
32#
33# These packages use a -dev naming convention in both Debian and Red Hat:
34# libgdbmg1 (non-development version of GNU libc 2-linked GDBM library)
35# libgdbmg1-dev (development version of GNU libc 2-linked GDBM library)
36# So make sure that for any libraries you wish to link Perl with under
37# Debian or Red Hat you have the -dev packages installed.
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38
39# SuSE Linux can be used as cross-compilation host for Cray XT4 Catamount/Qk.
40if test -d /opt/xt-pe
41then
42 case "`cc -V 2>&1`" in
43 *catamount*) . hints/catamount.sh; return ;;
44 esac
45fi
46
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47# Some operating systems (e.g., Solaris 2.6) will link to a versioned shared
48# library implicitly. For example, on Solaris, `ld foo.o -lgdbm' will find an
49# appropriate version of libgdbm, if one is available; Linux, however, doesn't
50# do the implicit mapping.
51ignore_versioned_solibs='y'
52
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53# BSD compatibility library no longer needed
54# 'kaffe' has a /usr/lib/libnet.so which is not at all relevant for perl.
55# bind causes issues with several reentrant functions
56set `echo X "$libswanted "| sed -e 's/ bsd / /' -e 's/ net / /' -e 's/ bind / /'`
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PP
57shift
58libswanted="$*"
1fc4cb55 59
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60# Debian 4.0 puts ndbm in the -lgdbm_compat library.
61libswanted="$libswanted gdbm_compat"
62
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63# If you have glibc, then report the version for ./myconfig bug reporting.
64# (Configure doesn't need to know the specific version since it just uses
65# gcc to load the library for all tests.)
f443a56e 66# We don't use __GLIBC__ and __GLIBC_MINOR__ because they
a4ea3e34
AD
67# are insufficiently precise to distinguish things like
68# libc-2.0.6 and libc-2.0.7.
69if test -L /lib/libc.so.6; then
70 libc=`ls -l /lib/libc.so.6 | awk '{print $NF}'`
71 libc=/lib/$libc
72fi
73
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74# Configure may fail to find lstat() since it's a static/inline
75# function in <sys/stat.h>.
76d_lstat=define
1aef975c 77
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78# malloc wrap works
79case "$usemallocwrap" in
80'') usemallocwrap='define' ;;
81esac
82
f443a56e 83# The system malloc() is about as fast and as frugal as perl's.
c3404dc3
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84# Since the system malloc() has been the default since at least
85# 5.001, we might as well leave it that way. --AD 10 Jan 2002
c07a80fd
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86case "$usemymalloc" in
87'') usemymalloc='n' ;;
88esac
1aef975c 89
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90# Check if we're about to use Intel's ICC compiler
91case "`${cc:-cc} -V 2>&1`" in
87d05bbe 92*"Intel(R) C++ Compiler"*|*"Intel(R) C Compiler"*)
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93 # record the version, formats:
94 # icc (ICC) 10.1 20080801
95 # icpc (ICC) 10.1 20080801
96 # followed by a copyright on the second line
97 ccversion=`${cc:-cc} --version | sed -n -e 's/^icp\?c \((ICC) \)\?//p'`
06d57135 98 # This is needed for Configure's prototype checks to work correctly
383f9357 99 # The -mp flag is needed to pass various floating point related tests
6ae709ad 100 # The -no-gcc flag is needed otherwise, icc pretends (poorly) to be gcc
383f9357 101 ccflags="-we147 -mp -no-gcc $ccflags"
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102 # Prevent relocation errors on 64bits arch
103 case "`uname -m`" in
104 *ia64*|*x86_64*)
105 cccdlflags='-fPIC'
106 ;;
107 esac
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108 # If we're using ICC, we usually want the best performance
109 case "$optimize" in
110 '') optimize='-O3' ;;
111 esac
112 ;;
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113*" Sun "*"C"*)
114 # Sun's C compiler, which might have a 'tag' name between
115 # 'Sun' and the 'C': Examples:
116 # cc: Sun C 5.9 Linux_i386 Patch 124871-01 2007/07/31
117 # cc: Sun Ceres C 5.10 Linux_i386 2008/07/10
395ff119 118 test "$optimize" || optimize='-xO2'
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119 cccdlflags='-KPIC'
120 lddlflags='-G -Bdynamic'
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121 # Sun C doesn't support gcc attributes, but, in many cases, doesn't
122 # complain either. Not all cases, though.
123 d_attribute_format='undef'
124 d_attribute_malloc='undef'
125 d_attribute_nonnull='undef'
126 d_attribute_noreturn='undef'
127 d_attribute_pure='undef'
128 d_attribute_unused='undef'
129 d_attribute_warn_unused_result='undef'
6452e86c 130 ;;
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131esac
132
1aef975c 133case "$optimize" in
051e4fe1 134# use -O2 by default ; -O3 doesn't seem to bring significant benefits with gcc
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135'')
136 optimize='-O2'
137 case "`uname -m`" in
138 ppc*)
139 # on ppc, it seems that gcc (at least gcc 3.3.2) isn't happy
f88ad257 140 # with -O2 ; so downgrade to -O1.
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141 optimize='-O1'
142 ;;
f88ad257
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143 ia64*)
144 # This architecture has had various problems with gcc's
145 # in the 3.2, 3.3, and 3.4 releases when optimized to -O2. See
146 # RT #37156 for a discussion of the problem.
147 case "`${cc:-gcc} -v 2>&1`" in
148 *"version 3.2"*|*"version 3.3"*|*"version 3.4"*)
149 ccflags="-fno-delete-null-pointer-checks $ccflags"
150 ;;
151 esac
152 ;;
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153 esac
154 ;;
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155esac
156
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157# Ubuntu 11.04 (and later, presumably) doesn't keep most libraries
158# (such as -lm) in /lib or /usr/lib. So we have to ask gcc to tell us
159# where to look. We don't want gcc's own libraries, however, so we
160# filter those out.
161# This could be conditional on Unbuntu, but other distributions may
162# follow suit, and this scheme seems to work even on rather old gcc's.
163# This unconditionally uses gcc because even if the user is using another
164# compiler, we still need to find the math library and friends, and I don't
165# know how other compilers will cope with that situation.
dcffd848
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166# Morever, if the user has their own gcc earlier in $PATH than the system gcc,
167# we don't want its libraries. So we try to prefer the system gcc
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168# Still, as an escape hatch, allow Configure command line overrides to
169# plibpth to bypass this check.
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170if [ -x /usr/bin/gcc ] ; then
171 gcc=/usr/bin/gcc
172else
173 gcc=gcc
174fi
175
40f02623 176case "$plibpth" in
9e25173d 177'') plibpth=`LANG=C LC_ALL=C $gcc -print-search-dirs | grep libraries |
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AD
178 cut -f2- -d= | tr ':' $trnl | grep -v 'gcc' | sed -e 's:/$::'`
179 set X $plibpth # Collapse all entries on one line
180 shift
181 plibpth="$*"
40f02623
AD
182 ;;
183esac
184
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185# Are we using ELF? Thanks to Kenneth Albanowski <kjahds@kjahds.com>
186# for this test.
187cat >try.c <<'EOM'
188/* Test for whether ELF binaries are produced */
189#include <fcntl.h>
190#include <stdlib.h>
b1e55cab 191#include <unistd.h>
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192main() {
193 char buffer[4];
194 int i=open("a.out",O_RDONLY);
195 if(i==-1)
196 exit(1); /* fail */
197 if(read(i,&buffer[0],4)<4)
198 exit(1); /* fail */
199 if(buffer[0] != 127 || buffer[1] != 'E' ||
200 buffer[2] != 'L' || buffer[3] != 'F')
201 exit(1); /* fail */
202 exit(0); /* succeed (yes, it's ELF) */
203}
204EOM
5440bc8e 205if ${cc:-gcc} try.c >/dev/null 2>&1 && $run ./a.out; then
ef0c9946 206 cat <<'EOM' >&4
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207
208You appear to have ELF support. I'll try to use it for dynamic loading.
ef0c9946 209If dynamic loading doesn't work, read hints/linux.sh for further information.
232e078e 210EOM
ef0c9946 211
232e078e 212else
ef0c9946 213 cat <<'EOM' >&4
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214
215You don't have an ELF gcc. I will use dld if possible. If you are
216using a version of DLD earlier than 3.2.6, or don't have it at all, you
217should probably upgrade. If you are forced to use 3.2.4, you should
c2960299
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218uncomment a couple of lines in hints/linux.sh and restart Configure so
219that shared libraries will be disallowed.
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220
221EOM
232e078e 222 lddlflags="-r $lddlflags"
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223 # These empty values are so that Configure doesn't put in the
224 # Linux ELF values.
225 ccdlflags=' '
226 cccdlflags=' '
c07a80fd 227 ccflags="-DOVR_DBL_DIG=14 $ccflags"
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228 so='sa'
229 dlext='o'
a5f75d66 230 nm_so_opt=' '
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231 ## If you are using DLD 3.2.4 which does not support shared libs,
232 ## uncomment the next two lines:
233 #ldflags="-static"
234 #so='none'
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235
236 # In addition, on some systems there is a problem with perl and NDBM
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237 # which causes AnyDBM and NDBM_File to lock up. This is evidenced
238 # in the tests as AnyDBM just freezing. Apparently, this only
ef0c9946
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239 # happens on a.out systems, so we disable NDBM for all a.out linux
240 # systems. If someone can suggest a more robust test
241 # that would be appreciated.
242 #
243 # More info:
244 # Date: Wed, 7 Feb 1996 03:21:04 +0900
245 # From: Jeffrey Friedl <jfriedl@nff.ncl.omron.co.jp>
246 #
247 # I tried compiling with DBM support and sure enough things locked up
248 # just as advertised. Checking into it, I found that the lockup was
249 # during the call to dbm_open. Not *in* dbm_open -- but between the call
250 # to and the jump into.
f443a56e 251 #
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252 # To make a long story short, making sure that the *.a and *.sa pairs of
253 # /usr/lib/lib{m,db,gdbm}.{a,sa}
254 # were perfectly in sync took care of it.
255 #
256 # This will generate a harmless Whoa There! message
257 case "$d_dbm_open" in
258 '') cat <<'EOM' >&4
259
260Disabling ndbm. This will generate a Whoa There message in Configure.
261Read hints/linux.sh for further information.
262EOM
263 # You can override this with Configure -Dd_dbm_open
264 d_dbm_open=undef
265 ;;
266 esac
232e078e 267fi
a0d0e21e 268
c2960299 269rm -f try.c a.out
16d20bd9 270
e218ce4d 271if /bin/sh -c exit; then
284c50cc
MDLR
272 echo ''
273 echo 'You appear to have a working bash. Good.'
c2960299 274else
ef0c9946 275 cat << 'EOM' >&4
a0d0e21e 276
ef0c9946
PP
277*********************** Warning! *********************
278It would appear you have a defective bash shell installed. This is likely to
279give you a failure of op/exec test #5 during the test phase of the build,
280Upgrading to a recent version (1.14.4 or later) should fix the problem.
281******************************************************
a0d0e21e 282EOM
c2960299
AD
283
284fi
16d20bd9 285
284c50cc
MDLR
286# On SPARClinux,
287# The following csh consistently coredumped in the test directory
288# "/home/mikedlr/perl5.003_94/t", though not most other directories.
289
290#Name : csh Distribution: Red Hat Linux (Rembrandt)
291#Version : 5.2.6 Vendor: Red Hat Software
292#Release : 3 Build Date: Fri May 24 19:42:14 1996
293#Install date: Thu Jul 11 16:20:14 1996 Build Host: itchy.redhat.com
294#Group : Shells Source RPM: csh-5.2.6-3.src.rpm
295#Size : 184417
296#Description : BSD c-shell
297
298# For this reason I suggest using the much bug-fixed tcsh for globbing
299# where available.
300
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JH
301# November 2001: That warning's pretty old now and probably not so
302# relevant, especially since perl now uses File::Glob for globbing.
303# We'll still look for tcsh, but tone down the warnings.
304# Andy Dougherty, Nov. 6, 2001
305if $csh -c 'echo $version' >/dev/null 2>&1; then
306 echo 'Your csh is really tcsh. Good.'
307else
99cae59c 308 if xxx=`./UU/loc tcsh blurfl $pth`; $test -f "$xxx"; then
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PP
309 echo "Found tcsh. I'll use it for globbing."
310 # We can't change Configure's setting of $csh, due to the way
311 # Configure handles $d_portable and commands found in $loclist.
312 # We can set the value for CSH in config.h by setting full_csh.
313 full_csh=$xxx
3d413b55
JH
314 elif [ -f "$csh" ]; then
315 echo "Couldn't find tcsh. Csh-based globbing might be broken."
46fc3d4c 316 fi
284c50cc 317fi
dc66995c 318
92526645
CN
319# Shimpei Yamashita <shimpei@socrates.patnet.caltech.edu>
320# Message-Id: <33EF1634.B36B6500@pobox.com>
f443a56e 321#
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322# The DR2 of MkLinux (osname=linux,archname=ppc-linux) may need
323# special flags passed in order for dynamic loading to work.
92526645 324# instead of the recommended:
17ff8a05 325#
92526645 326# ccdlflags='-rdynamic'
f443a56e 327#
92526645
CN
328# it should be:
329# ccdlflags='-Wl,-E'
17ff8a05
JH
330#
331# So if your DR2 (DR3 came out summer 1998, consider upgrading)
332# has problems with dynamic loading, uncomment the
333# following three lines, make distclean, and re-Configure:
334#case "`uname -r | sed 's/^[0-9.-]*//'``arch`" in
335#'osfmach3ppc') ccdlflags='-Wl,-E' ;;
336#esac
92526645 337
f6527d0e
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338case "`uname -m`" in
339sparc*)
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340 case "$cccdlflags" in
341 *-fpic*) cccdlflags="`echo $cccdlflags|sed 's/-fpic/-fPIC/'`" ;;
4cd66402 342 *-fPIC*) ;;
7cd1f58a
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343 *) cccdlflags="$cccdlflags -fPIC" ;;
344 esac
345 ;;
346esac
347
f443a56e
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348# SuSE8.2 has /usr/lib/libndbm* which are ld scripts rather than
349# true libraries. The scripts cause binding against static
350# version of -lgdbm which is a bad idea. So if we have 'nm'
351# make sure it can read the file
352# NI-S 2003/08/07
353if [ -r /usr/lib/libndbm.so -a -x /usr/bin/nm ] ; then
354 if /usr/bin/nm /usr/lib/libndbm.so >/dev/null 2>&1 ; then
355 echo 'Your shared -lndbm seems to be a real library.'
356 else
357 echo 'Your shared -lndbm is not a real library.'
358 set `echo X "$libswanted "| sed -e 's/ ndbm / /'`
359 shift
360 libswanted="$*"
361 fi
362fi
363
364
365# This script UU/usethreads.cbu will get 'called-back' by Configure
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JH
366# after it has prompted the user for whether to use threads.
367cat > UU/usethreads.cbu <<'EOCBU'
368case "$usethreads" in
369$define|true|[yY]*)
d7c042c9 370 ccflags="-D_REENTRANT -D_GNU_SOURCE $ccflags"
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371 if echo $libswanted | grep -v pthread >/dev/null
372 then
373 set `echo X "$libswanted "| sed -e 's/ c / pthread c /'`
374 shift
375 libswanted="$*"
376 fi
47b8d1e2 377
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378 # Somehow at least in Debian 2.2 these manage to escape
379 # the #define forest of <features.h> and <time.h> so that
c95a4480
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380 # the hasproto macro of Configure doesn't see these protos,
381 # even with the -D_GNU_SOURCE.
47b8d1e2 382
a48ec845 383 d_asctime_r_proto="$define"
47b8d1e2 384 d_crypt_r_proto="$define"
a48ec845
JH
385 d_ctime_r_proto="$define"
386 d_gmtime_r_proto="$define"
387 d_localtime_r_proto="$define"
01b53dac 388 d_random_r_proto="$define"
47b8d1e2 389
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390 ;;
391esac
392EOCBU
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393
394cat > UU/uselargefiles.cbu <<'EOCBU'
f443a56e 395# This script UU/uselargefiles.cbu will get 'called-back' by Configure
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396# after it has prompted the user for whether to use large files.
397case "$uselargefiles" in
398''|$define|true|[yY]*)
9422c00b 399# Keep this in the left margin.
45c9e83b 400ccflags_uselargefiles="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
9422c00b 401
45c9e83b 402 ccflags="$ccflags $ccflags_uselargefiles"
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GS
403 ;;
404esac
405EOCBU
3fe280b7
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406
407# Purify fails to link Perl if a "-lc" is passed into its linker
408# due to duplicate symbols.
409case "$PURIFY" in
410$define|true|[yY]*)
411 set `echo X "$libswanted "| sed -e 's/ c / /'`
412 shift
413 libswanted="$*"
414 ;;
415esac
b1e55cab 416
c3faea48
JH
417# If using g++, the Configure scan for dlopen() and (especially)
418# dlerror() might fail, easier just to forcibly hint them in.
419case "$cc" in
420*g++*)
421 d_dlopen='define'
422 d_dlerror='define'
423 ;;
424esac
5d3df70f
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425
426# Under some circumstances libdb can get built in such a way as to
427# need pthread explicitly linked.
428
429libdb_needs_pthread="N"
430
431if echo " $libswanted " | grep -v " pthread " >/dev/null
432then
433 if echo " $libswanted " | grep " db " >/dev/null
434 then
435 for DBDIR in $glibpth
436 do
437 DBLIB="$DBDIR/libdb.so"
438 if [ -f $DBLIB ]
439 then
440 if nm -u $DBLIB | grep pthread >/dev/null
441 then
442 if ldd $DBLIB | grep pthread >/dev/null
443 then
444 libdb_needs_pthread="N"
445 else
446 libdb_needs_pthread="Y"
447 fi
448 fi
449 fi
450 done
451 fi
452fi
453
454case "$libdb_needs_pthread" in
455 "Y")
456 libswanted="$libswanted pthread"
457 ;;
458esac