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Improve detection of Intel C/C++ compilers. (#18001)
[perl5.git] / hints / linux.sh
CommitLineData
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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AD
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
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
400f22b8 42 case "`${cc:-cc} -V 2>&1`" in
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43 *catamount*) . hints/catamount.sh; return ;;
44 esac
45fi
46
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47# Some operating systems (e.g., Solaris 2.6) will link to a versioned shared
48# library implicitly. For example, on Solaris, `ld foo.o -lgdbm' will find an
49# appropriate version of libgdbm, if one is available; Linux, however, doesn't
50# do the implicit mapping.
51ignore_versioned_solibs='y'
52
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53# BSD compatibility library no longer needed
54# 'kaffe' has a /usr/lib/libnet.so which is not at all relevant for perl.
55# bind causes issues with several reentrant functions
56set `echo X "$libswanted "| sed -e 's/ bsd / /' -e 's/ net / /' -e 's/ bind / /'`
4bf4dbb3
PP
57shift
58libswanted="$*"
1fc4cb55 59
a33f2d9f 60# Debian 4.0 puts ndbm in the -lgdbm_compat library.
a5dbacf8
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61echo $libs
62if echo " $libswanted " | grep -q ' gdbm '; then
63 # Only add if gdbm is in libswanted.
64 libswanted="$libswanted gdbm_compat"
65fi
a33f2d9f 66
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67# Configure may fail to find lstat() since it's a static/inline
68# function in <sys/stat.h>.
69d_lstat=define
1aef975c 70
da0b61dd
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71# malloc wrap works
72case "$usemallocwrap" in
73'') usemallocwrap='define' ;;
74esac
75
f443a56e 76# The system malloc() is about as fast and as frugal as perl's.
c3404dc3
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77# Since the system malloc() has been the default since at least
78# 5.001, we might as well leave it that way. --AD 10 Jan 2002
c07a80fd
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79case "$usemymalloc" in
80'') usemymalloc='n' ;;
81esac
1aef975c 82
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83uname_minus_m="`$run uname -m 2>/dev/null`"
84uname_minus_m="${uname_minus_m:-"$targetarch"}"
85
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86# Check if we're about to use Intel's ICC compiler
87case "`${cc:-cc} -V 2>&1`" in
8ffcbbbe 88*"Intel(R) C"*" Compiler"*)
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89 # record the version, formats:
90 # icc (ICC) 10.1 20080801
91 # icpc (ICC) 10.1 20080801
92 # followed by a copyright on the second line
93 ccversion=`${cc:-cc} --version | sed -n -e 's/^icp\?c \((ICC) \)\?//p'`
06d57135 94 # This is needed for Configure's prototype checks to work correctly
383f9357 95 # The -mp flag is needed to pass various floating point related tests
6ae709ad 96 # The -no-gcc flag is needed otherwise, icc pretends (poorly) to be gcc
383f9357 97 ccflags="-we147 -mp -no-gcc $ccflags"
95960e9d 98 # Prevent relocation errors on 64bits arch
dd098899 99 case "$uname_minus_m" in
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100 *ia64*|*x86_64*)
101 cccdlflags='-fPIC'
102 ;;
103 esac
06d57135
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104 # If we're using ICC, we usually want the best performance
105 case "$optimize" in
106 '') optimize='-O3' ;;
107 esac
108 ;;
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109*" Sun "*"C"*)
110 # Sun's C compiler, which might have a 'tag' name between
111 # 'Sun' and the 'C': Examples:
112 # cc: Sun C 5.9 Linux_i386 Patch 124871-01 2007/07/31
113 # cc: Sun Ceres C 5.10 Linux_i386 2008/07/10
395ff119 114 test "$optimize" || optimize='-xO2'
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115 cccdlflags='-KPIC'
116 lddlflags='-G -Bdynamic'
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117 # Sun C doesn't support gcc attributes, but, in many cases, doesn't
118 # complain either. Not all cases, though.
119 d_attribute_format='undef'
120 d_attribute_malloc='undef'
121 d_attribute_nonnull='undef'
122 d_attribute_noreturn='undef'
123 d_attribute_pure='undef'
124 d_attribute_unused='undef'
125 d_attribute_warn_unused_result='undef'
6452e86c 126 ;;
06d57135
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127esac
128
1aef975c 129case "$optimize" in
051e4fe1 130# use -O2 by default ; -O3 doesn't seem to bring significant benefits with gcc
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131'')
132 optimize='-O2'
dd098899 133 case "$uname_minus_m" in
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134 ppc*)
135 # on ppc, it seems that gcc (at least gcc 3.3.2) isn't happy
f88ad257 136 # with -O2 ; so downgrade to -O1.
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137 optimize='-O1'
138 ;;
f88ad257
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139 ia64*)
140 # This architecture has had various problems with gcc's
141 # in the 3.2, 3.3, and 3.4 releases when optimized to -O2. See
142 # RT #37156 for a discussion of the problem.
143 case "`${cc:-gcc} -v 2>&1`" in
144 *"version 3.2"*|*"version 3.3"*|*"version 3.4"*)
145 ccflags="-fno-delete-null-pointer-checks $ccflags"
146 ;;
147 esac
148 ;;
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149 esac
150 ;;
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151esac
152
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153# Ubuntu 11.04 (and later, presumably) doesn't keep most libraries
154# (such as -lm) in /lib or /usr/lib. So we have to ask gcc to tell us
155# where to look. We don't want gcc's own libraries, however, so we
156# filter those out.
157# This could be conditional on Unbuntu, but other distributions may
158# follow suit, and this scheme seems to work even on rather old gcc's.
159# This unconditionally uses gcc because even if the user is using another
160# compiler, we still need to find the math library and friends, and I don't
161# know how other compilers will cope with that situation.
dcffd848
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162# Morever, if the user has their own gcc earlier in $PATH than the system gcc,
163# we don't want its libraries. So we try to prefer the system gcc
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164# Still, as an escape hatch, allow Configure command line overrides to
165# plibpth to bypass this check.
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166if [ -x /usr/bin/gcc ] ; then
167 gcc=/usr/bin/gcc
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168# clang also provides -print-search-dirs
169elif ${cc:-cc} --version 2>/dev/null | grep -q '^clang ' ; then
170 gcc=${cc:-cc}
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171else
172 gcc=gcc
173fi
174
40f02623 175case "$plibpth" in
753809b0 176'') plibpth=`LANG=C LC_ALL=C $gcc $ccflags $ldflags -print-search-dirs | grep libraries |
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AD
177 cut -f2- -d= | tr ':' $trnl | grep -v 'gcc' | sed -e 's:/$::'`
178 set X $plibpth # Collapse all entries on one line
179 shift
180 plibpth="$*"
40f02623
AD
181 ;;
182esac
183
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184# For the musl libc, perl should #define _GNU_SOURCE. Otherwise, some
185# available functions, like memem, won't be used. See the discussion in
186# [perl #133760]. musl doesn't offer an easy way to identify it, but,
187# at least on alpine linux, the ldd --version output contains the
188# string 'musl.'
189case `ldd --version 2>&1` in
190 musl*) ccflags="$ccflags -D_GNU_SOURCE" ;;
191 *) ;;
192esac
193
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194# libquadmath is sometimes installed as gcc internal library,
195# so contrary to our usual policy of *not* looking at gcc internal
196# directories we now *do* look at them, in case they contain
197# the quadmath library.
198# XXX This may apply to other gcc internal libraries, if such exist.
199# XXX This could be at Configure level, but then the $gcc is messy.
200case "$usequadmath" in
201"$define")
202 for d in `LANG=C LC_ALL=C $gcc $ccflags $ldflags -print-search-dirs | grep libraries | cut -f2- -d= | tr ':' $trnl | grep 'gcc' | sed -e 's:/$::'`
203 do
204 case `ls $d/*libquadmath*$so* 2>/dev/null` in
205 $d/*libquadmath*$so*) xlibpth="$xlibpth $d" ;;
206 esac
207 done
208 ;;
209esac
210
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BF
211case "$libc" in
212'')
213# If you have glibc, then report the version for ./myconfig bug reporting.
214# (Configure doesn't need to know the specific version since it just uses
215# gcc to load the library for all tests.)
216# We don't use __GLIBC__ and __GLIBC_MINOR__ because they
217# are insufficiently precise to distinguish things like
218# libc-2.0.6 and libc-2.0.7.
219 for p in $plibpth
220 do
221 for trylib in libc.so.6 libc.so
222 do
223 if $test -e $p/$trylib; then
224 libc=`ls -l $p/$trylib | awk '{print $NF}'`
225 if $test "X$libc" != X; then
226 break
227 fi
228 fi
229 done
230 if $test "X$libc" != X; then
231 break
232 fi
233 done
234 ;;
235esac
236
400f22b8 237if ${sh:-/bin/sh} -c exit; then
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238 echo ''
239 echo 'You appear to have a working bash. Good.'
c2960299 240else
ef0c9946 241 cat << 'EOM' >&4
a0d0e21e 242
ef0c9946
PP
243*********************** Warning! *********************
244It would appear you have a defective bash shell installed. This is likely to
245give you a failure of op/exec test #5 during the test phase of the build,
246Upgrading to a recent version (1.14.4 or later) should fix the problem.
247******************************************************
a0d0e21e 248EOM
c2960299
AD
249
250fi
16d20bd9 251
284c50cc
MDLR
252# On SPARClinux,
253# The following csh consistently coredumped in the test directory
254# "/home/mikedlr/perl5.003_94/t", though not most other directories.
255
256#Name : csh Distribution: Red Hat Linux (Rembrandt)
257#Version : 5.2.6 Vendor: Red Hat Software
258#Release : 3 Build Date: Fri May 24 19:42:14 1996
259#Install date: Thu Jul 11 16:20:14 1996 Build Host: itchy.redhat.com
260#Group : Shells Source RPM: csh-5.2.6-3.src.rpm
261#Size : 184417
262#Description : BSD c-shell
263
264# For this reason I suggest using the much bug-fixed tcsh for globbing
265# where available.
266
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JH
267# November 2001: That warning's pretty old now and probably not so
268# relevant, especially since perl now uses File::Glob for globbing.
269# We'll still look for tcsh, but tone down the warnings.
270# Andy Dougherty, Nov. 6, 2001
271if $csh -c 'echo $version' >/dev/null 2>&1; then
272 echo 'Your csh is really tcsh. Good.'
273else
99cae59c 274 if xxx=`./UU/loc tcsh blurfl $pth`; $test -f "$xxx"; then
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PP
275 echo "Found tcsh. I'll use it for globbing."
276 # We can't change Configure's setting of $csh, due to the way
277 # Configure handles $d_portable and commands found in $loclist.
278 # We can set the value for CSH in config.h by setting full_csh.
279 full_csh=$xxx
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JH
280 elif [ -f "$csh" ]; then
281 echo "Couldn't find tcsh. Csh-based globbing might be broken."
46fc3d4c 282 fi
284c50cc 283fi
dc66995c 284
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285# Shimpei Yamashita <shimpei@socrates.patnet.caltech.edu>
286# Message-Id: <33EF1634.B36B6500@pobox.com>
f443a56e 287#
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288# The DR2 of MkLinux (osname=linux,archname=ppc-linux) may need
289# special flags passed in order for dynamic loading to work.
92526645 290# instead of the recommended:
17ff8a05 291#
92526645 292# ccdlflags='-rdynamic'
f443a56e 293#
92526645
CN
294# it should be:
295# ccdlflags='-Wl,-E'
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JH
296#
297# So if your DR2 (DR3 came out summer 1998, consider upgrading)
298# has problems with dynamic loading, uncomment the
299# following three lines, make distclean, and re-Configure:
300#case "`uname -r | sed 's/^[0-9.-]*//'``arch`" in
301#'osfmach3ppc') ccdlflags='-Wl,-E' ;;
302#esac
92526645 303
dd098899 304case "$uname_minus_m" in
f6527d0e 305sparc*)
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BJ
306 case "$cccdlflags" in
307 *-fpic*) cccdlflags="`echo $cccdlflags|sed 's/-fpic/-fPIC/'`" ;;
4cd66402 308 *-fPIC*) ;;
7cd1f58a
BJ
309 *) cccdlflags="$cccdlflags -fPIC" ;;
310 esac
311 ;;
312esac
313
f443a56e
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314# SuSE8.2 has /usr/lib/libndbm* which are ld scripts rather than
315# true libraries. The scripts cause binding against static
316# version of -lgdbm which is a bad idea. So if we have 'nm'
317# make sure it can read the file
318# NI-S 2003/08/07
70e1ff59
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319case "$nm" in
320 '') ;;
321 *)
322 for p in $plibpth
323 do
324 if $test -r $p/libndbm.so; then
325 if $nm $p/libndbm.so >/dev/null 2>&1 ; then
326 echo 'Your shared -lndbm seems to be a real library.'
327 _libndbm_real=1
328 break
329 fi
330 fi
331 done
332 if $test "X$_libndbm_real" = X; then
333 echo 'Your shared -lndbm is not a real library.'
334 set `echo X "$libswanted "| sed -e 's/ ndbm / /'`
335 shift
336 libswanted="$*"
337 fi
338 ;;
339esac
f443a56e 340
79a18634
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341# Linux on Synology.
342if [ -f /etc/synoinfo.conf -a -d /usr/syno ]; then
343 # Tested on Synology DS213 and DS413
344 # OS version info in /etc.defaults/VERSION
345 # http://forum.synology.com/wiki/index.php/What_kind_of_CPU_does_my_NAS_have
346 # Synology DS213 running DSM 4.3-3810-0 (2013-11-06)
347 # CPU model Marvell Kirkwood mv6282 ARMv5te
348 # Linux 2.6.32.12 #3810 Wed Nov 6 05:13:41 CST 2013 armv5tel GNU/Linux
349 # Synology DS413 running DSM 4.3-3810-0 (2013-11-06)
350 # CPU model Freescale QorIQ P1022 ppc (e500v2)
351 # linux 2.6.32.12 #3810 ppc GNU/Linux
352 # All development stuff installed with ipkg is in /opt
353 if [ "$LANG" = "" -o "$LANG" = "C" ]; then
354 echo 'Your LANG is safe'
355 else
356 echo 'Please set $LANG to "C". All other $LANG settings will cause havoc' >&4
357 LANG=C
358 fi
359 echo 'Setting up to use /opt/*' >&4
360 locincpth="/opt/include $locincpth"
361 libpth="/opt/lib $libpth"
362 libspth="/opt/lib $libspth"
363 loclibpth="/opt/lib $loclibpth"
364 # POSIX will not link without the pthread lib
365 libswanted="$libswanted pthread"
366 echo "$libswanted" >&4
367fi
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368
369# This script UU/usethreads.cbu will get 'called-back' by Configure
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370# after it has prompted the user for whether to use threads.
371cat > UU/usethreads.cbu <<'EOCBU'
372case "$usethreads" in
373$define|true|[yY]*)
d7c042c9 374 ccflags="-D_REENTRANT -D_GNU_SOURCE $ccflags"
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375 if echo $libswanted | grep -v pthread >/dev/null
376 then
377 set `echo X "$libswanted "| sed -e 's/ c / pthread c /'`
378 shift
379 libswanted="$*"
380 fi
47b8d1e2 381
a48ec845
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382 # Somehow at least in Debian 2.2 these manage to escape
383 # the #define forest of <features.h> and <time.h> so that
c95a4480
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384 # the hasproto macro of Configure doesn't see these protos,
385 # even with the -D_GNU_SOURCE.
47b8d1e2 386
a48ec845 387 d_asctime_r_proto="$define"
47b8d1e2 388 d_crypt_r_proto="$define"
a48ec845
JH
389 d_ctime_r_proto="$define"
390 d_gmtime_r_proto="$define"
391 d_localtime_r_proto="$define"
01b53dac 392 d_random_r_proto="$define"
47b8d1e2 393
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394 ;;
395esac
396EOCBU
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397
398cat > UU/uselargefiles.cbu <<'EOCBU'
f443a56e 399# This script UU/uselargefiles.cbu will get 'called-back' by Configure
7f2eea8e
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400# after it has prompted the user for whether to use large files.
401case "$uselargefiles" in
402''|$define|true|[yY]*)
9422c00b 403# Keep this in the left margin.
45c9e83b 404ccflags_uselargefiles="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
9422c00b 405
45c9e83b 406 ccflags="$ccflags $ccflags_uselargefiles"
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GS
407 ;;
408esac
409EOCBU
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410
411# Purify fails to link Perl if a "-lc" is passed into its linker
412# due to duplicate symbols.
413case "$PURIFY" in
414$define|true|[yY]*)
415 set `echo X "$libswanted "| sed -e 's/ c / /'`
416 shift
417 libswanted="$*"
418 ;;
419esac
b1e55cab 420
c3faea48
JH
421# If using g++, the Configure scan for dlopen() and (especially)
422# dlerror() might fail, easier just to forcibly hint them in.
423case "$cc" in
424*g++*)
425 d_dlopen='define'
426 d_dlerror='define'
427 ;;
428esac
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429
430# Under some circumstances libdb can get built in such a way as to
431# need pthread explicitly linked.
432
433libdb_needs_pthread="N"
434
435if echo " $libswanted " | grep -v " pthread " >/dev/null
436then
437 if echo " $libswanted " | grep " db " >/dev/null
438 then
439 for DBDIR in $glibpth
440 do
441 DBLIB="$DBDIR/libdb.so"
442 if [ -f $DBLIB ]
443 then
31b42f2e 444 if ${nm:-nm} -u $DBLIB 2>/dev/null | grep pthread >/dev/null
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445 then
446 if ldd $DBLIB | grep pthread >/dev/null
447 then
448 libdb_needs_pthread="N"
449 else
450 libdb_needs_pthread="Y"
451 fi
452 fi
453 fi
454 done
455 fi
456fi
457
458case "$libdb_needs_pthread" in
459 "Y")
460 libswanted="$libswanted pthread"
461 ;;
462esac