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Linux hints: Improve the portability of the -lndbm check
[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#
232e078e
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>
ef0c9946
PP
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
CS
18# No version of Linux supports setuid scripts.
19d_suidsafe='undef'
f3db1d4d 20
5aa2cbff
FR
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.
9c12f1e5
RGS
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 "`${cc:-cc} -V 2>&1`" in
9c12f1e5
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43 *catamount*) . hints/catamount.sh; return ;;
44 esac
45fi
46
1cfa4ec7
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47# Some operating systems (e.g., Solaris 2.6) will link to a versioned shared
48# library implicitly. For example, on Solaris, `ld foo.o -lgdbm' will find an
49# appropriate version of libgdbm, if one is available; Linux, however, doesn't
50# do the implicit mapping.
51ignore_versioned_solibs='y'
52
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53# BSD compatibility library no longer needed
54# 'kaffe' has a /usr/lib/libnet.so which is not at all relevant for perl.
55# bind causes issues with several reentrant functions
56set `echo X "$libswanted "| sed -e 's/ bsd / /' -e 's/ net / /' -e 's/ bind / /'`
4bf4dbb3
PP
57shift
58libswanted="$*"
1fc4cb55 59
a33f2d9f
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60# Debian 4.0 puts ndbm in the -lgdbm_compat library.
61libswanted="$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
da0b61dd
NC
78# malloc wrap works
79case "$usemallocwrap" in
80'') usemallocwrap='define' ;;
81esac
82
f443a56e 83# The system malloc() is about as fast and as frugal as perl's.
c3404dc3
AD
84# Since the system malloc() has been the default since at least
85# 5.001, we might as well leave it that way. --AD 10 Jan 2002
c07a80fd
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86case "$usemymalloc" in
87'') usemymalloc='n' ;;
88esac
1aef975c 89
dd098899
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90uname_minus_m="`$run uname -m 2>/dev/null`"
91uname_minus_m="${uname_minus_m:-"$targetarch"}"
92
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93# Check if we're about to use Intel's ICC compiler
94case "`${cc:-cc} -V 2>&1`" in
87d05bbe 95*"Intel(R) C++ Compiler"*|*"Intel(R) C Compiler"*)
77b33db6
TC
96 # record the version, formats:
97 # icc (ICC) 10.1 20080801
98 # icpc (ICC) 10.1 20080801
99 # followed by a copyright on the second line
100 ccversion=`${cc:-cc} --version | sed -n -e 's/^icp\?c \((ICC) \)\?//p'`
06d57135 101 # This is needed for Configure's prototype checks to work correctly
383f9357 102 # The -mp flag is needed to pass various floating point related tests
6ae709ad 103 # The -no-gcc flag is needed otherwise, icc pretends (poorly) to be gcc
383f9357 104 ccflags="-we147 -mp -no-gcc $ccflags"
95960e9d 105 # Prevent relocation errors on 64bits arch
dd098899 106 case "$uname_minus_m" in
95960e9d
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107 *ia64*|*x86_64*)
108 cccdlflags='-fPIC'
109 ;;
110 esac
06d57135
MHM
111 # If we're using ICC, we usually want the best performance
112 case "$optimize" in
113 '') optimize='-O3' ;;
114 esac
115 ;;
7accc71d
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116*" Sun "*"C"*)
117 # Sun's C compiler, which might have a 'tag' name between
118 # 'Sun' and the 'C': Examples:
119 # cc: Sun C 5.9 Linux_i386 Patch 124871-01 2007/07/31
120 # cc: Sun Ceres C 5.10 Linux_i386 2008/07/10
395ff119 121 test "$optimize" || optimize='-xO2'
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122 cccdlflags='-KPIC'
123 lddlflags='-G -Bdynamic'
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124 # Sun C doesn't support gcc attributes, but, in many cases, doesn't
125 # complain either. Not all cases, though.
126 d_attribute_format='undef'
127 d_attribute_malloc='undef'
128 d_attribute_nonnull='undef'
129 d_attribute_noreturn='undef'
130 d_attribute_pure='undef'
131 d_attribute_unused='undef'
132 d_attribute_warn_unused_result='undef'
6452e86c 133 ;;
06d57135
MHM
134esac
135
1aef975c 136case "$optimize" in
051e4fe1 137# use -O2 by default ; -O3 doesn't seem to bring significant benefits with gcc
be92ff21
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138'')
139 optimize='-O2'
dd098899 140 case "$uname_minus_m" in
be92ff21
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141 ppc*)
142 # on ppc, it seems that gcc (at least gcc 3.3.2) isn't happy
f88ad257 143 # with -O2 ; so downgrade to -O1.
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144 optimize='-O1'
145 ;;
f88ad257
SP
146 ia64*)
147 # This architecture has had various problems with gcc's
148 # in the 3.2, 3.3, and 3.4 releases when optimized to -O2. See
149 # RT #37156 for a discussion of the problem.
150 case "`${cc:-gcc} -v 2>&1`" in
151 *"version 3.2"*|*"version 3.3"*|*"version 3.4"*)
152 ccflags="-fno-delete-null-pointer-checks $ccflags"
153 ;;
154 esac
155 ;;
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156 esac
157 ;;
1aef975c
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158esac
159
40f02623
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160# Ubuntu 11.04 (and later, presumably) doesn't keep most libraries
161# (such as -lm) in /lib or /usr/lib. So we have to ask gcc to tell us
162# where to look. We don't want gcc's own libraries, however, so we
163# filter those out.
164# This could be conditional on Unbuntu, but other distributions may
165# follow suit, and this scheme seems to work even on rather old gcc's.
166# This unconditionally uses gcc because even if the user is using another
167# compiler, we still need to find the math library and friends, and I don't
168# know how other compilers will cope with that situation.
dcffd848
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169# Morever, if the user has their own gcc earlier in $PATH than the system gcc,
170# we don't want its libraries. So we try to prefer the system gcc
40f02623
AD
171# Still, as an escape hatch, allow Configure command line overrides to
172# plibpth to bypass this check.
dcffd848
NC
173if [ -x /usr/bin/gcc ] ; then
174 gcc=/usr/bin/gcc
175else
176 gcc=gcc
177fi
178
40f02623 179case "$plibpth" in
753809b0 180'') plibpth=`LANG=C LC_ALL=C $gcc $ccflags $ldflags -print-search-dirs | grep libraries |
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AD
181 cut -f2- -d= | tr ':' $trnl | grep -v 'gcc' | sed -e 's:/$::'`
182 set X $plibpth # Collapse all entries on one line
183 shift
184 plibpth="$*"
40f02623
AD
185 ;;
186esac
187
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188# Are we using ELF? Thanks to Kenneth Albanowski <kjahds@kjahds.com>
189# for this test.
190cat >try.c <<'EOM'
191/* Test for whether ELF binaries are produced */
192#include <fcntl.h>
193#include <stdlib.h>
b1e55cab 194#include <unistd.h>
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195main() {
196 char buffer[4];
197 int i=open("a.out",O_RDONLY);
198 if(i==-1)
199 exit(1); /* fail */
200 if(read(i,&buffer[0],4)<4)
201 exit(1); /* fail */
202 if(buffer[0] != 127 || buffer[1] != 'E' ||
203 buffer[2] != 'L' || buffer[3] != 'F')
204 exit(1); /* fail */
205 exit(0); /* succeed (yes, it's ELF) */
206}
207EOM
753809b0 208if ${cc:-gcc} $ccflags $ldflags try.c >/dev/null 2>&1 && $run ./a.out; then
ef0c9946 209 cat <<'EOM' >&4
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210
211You appear to have ELF support. I'll try to use it for dynamic loading.
ef0c9946 212If dynamic loading doesn't work, read hints/linux.sh for further information.
232e078e 213EOM
ef0c9946 214
232e078e 215else
ef0c9946 216 cat <<'EOM' >&4
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AD
217
218You don't have an ELF gcc. I will use dld if possible. If you are
219using a version of DLD earlier than 3.2.6, or don't have it at all, you
220should probably upgrade. If you are forced to use 3.2.4, you should
c2960299
AD
221uncomment a couple of lines in hints/linux.sh and restart Configure so
222that shared libraries will be disallowed.
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AD
223
224EOM
232e078e 225 lddlflags="-r $lddlflags"
5d94fbed
AD
226 # These empty values are so that Configure doesn't put in the
227 # Linux ELF values.
228 ccdlflags=' '
229 cccdlflags=' '
c07a80fd 230 ccflags="-DOVR_DBL_DIG=14 $ccflags"
1aef975c
AD
231 so='sa'
232 dlext='o'
a5f75d66 233 nm_so_opt=' '
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234 ## If you are using DLD 3.2.4 which does not support shared libs,
235 ## uncomment the next two lines:
236 #ldflags="-static"
237 #so='none'
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238
239 # In addition, on some systems there is a problem with perl and NDBM
f443a56e
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240 # which causes AnyDBM and NDBM_File to lock up. This is evidenced
241 # in the tests as AnyDBM just freezing. Apparently, this only
ef0c9946
PP
242 # happens on a.out systems, so we disable NDBM for all a.out linux
243 # systems. If someone can suggest a more robust test
244 # that would be appreciated.
245 #
246 # More info:
247 # Date: Wed, 7 Feb 1996 03:21:04 +0900
248 # From: Jeffrey Friedl <jfriedl@nff.ncl.omron.co.jp>
249 #
250 # I tried compiling with DBM support and sure enough things locked up
251 # just as advertised. Checking into it, I found that the lockup was
252 # during the call to dbm_open. Not *in* dbm_open -- but between the call
253 # to and the jump into.
f443a56e 254 #
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PP
255 # To make a long story short, making sure that the *.a and *.sa pairs of
256 # /usr/lib/lib{m,db,gdbm}.{a,sa}
257 # were perfectly in sync took care of it.
258 #
259 # This will generate a harmless Whoa There! message
260 case "$d_dbm_open" in
261 '') cat <<'EOM' >&4
262
263Disabling ndbm. This will generate a Whoa There message in Configure.
264Read hints/linux.sh for further information.
265EOM
266 # You can override this with Configure -Dd_dbm_open
267 d_dbm_open=undef
268 ;;
269 esac
232e078e 270fi
a0d0e21e 271
c2960299 272rm -f try.c a.out
16d20bd9 273
400f22b8 274if ${sh:-/bin/sh} -c exit; then
284c50cc
MDLR
275 echo ''
276 echo 'You appear to have a working bash. Good.'
c2960299 277else
ef0c9946 278 cat << 'EOM' >&4
a0d0e21e 279
ef0c9946
PP
280*********************** Warning! *********************
281It would appear you have a defective bash shell installed. This is likely to
282give you a failure of op/exec test #5 during the test phase of the build,
283Upgrading to a recent version (1.14.4 or later) should fix the problem.
284******************************************************
a0d0e21e 285EOM
c2960299
AD
286
287fi
16d20bd9 288
284c50cc
MDLR
289# On SPARClinux,
290# The following csh consistently coredumped in the test directory
291# "/home/mikedlr/perl5.003_94/t", though not most other directories.
292
293#Name : csh Distribution: Red Hat Linux (Rembrandt)
294#Version : 5.2.6 Vendor: Red Hat Software
295#Release : 3 Build Date: Fri May 24 19:42:14 1996
296#Install date: Thu Jul 11 16:20:14 1996 Build Host: itchy.redhat.com
297#Group : Shells Source RPM: csh-5.2.6-3.src.rpm
298#Size : 184417
299#Description : BSD c-shell
300
301# For this reason I suggest using the much bug-fixed tcsh for globbing
302# where available.
303
3d413b55
JH
304# November 2001: That warning's pretty old now and probably not so
305# relevant, especially since perl now uses File::Glob for globbing.
306# We'll still look for tcsh, but tone down the warnings.
307# Andy Dougherty, Nov. 6, 2001
308if $csh -c 'echo $version' >/dev/null 2>&1; then
309 echo 'Your csh is really tcsh. Good.'
310else
99cae59c 311 if xxx=`./UU/loc tcsh blurfl $pth`; $test -f "$xxx"; then
46fc3d4c
PP
312 echo "Found tcsh. I'll use it for globbing."
313 # We can't change Configure's setting of $csh, due to the way
314 # Configure handles $d_portable and commands found in $loclist.
315 # We can set the value for CSH in config.h by setting full_csh.
316 full_csh=$xxx
3d413b55
JH
317 elif [ -f "$csh" ]; then
318 echo "Couldn't find tcsh. Csh-based globbing might be broken."
46fc3d4c 319 fi
284c50cc 320fi
dc66995c 321
92526645
CN
322# Shimpei Yamashita <shimpei@socrates.patnet.caltech.edu>
323# Message-Id: <33EF1634.B36B6500@pobox.com>
f443a56e 324#
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JH
325# The DR2 of MkLinux (osname=linux,archname=ppc-linux) may need
326# special flags passed in order for dynamic loading to work.
92526645 327# instead of the recommended:
17ff8a05 328#
92526645 329# ccdlflags='-rdynamic'
f443a56e 330#
92526645
CN
331# it should be:
332# ccdlflags='-Wl,-E'
17ff8a05
JH
333#
334# So if your DR2 (DR3 came out summer 1998, consider upgrading)
335# has problems with dynamic loading, uncomment the
336# following three lines, make distclean, and re-Configure:
337#case "`uname -r | sed 's/^[0-9.-]*//'``arch`" in
338#'osfmach3ppc') ccdlflags='-Wl,-E' ;;
339#esac
92526645 340
dd098899 341case "$uname_minus_m" in
f6527d0e 342sparc*)
7cd1f58a
BJ
343 case "$cccdlflags" in
344 *-fpic*) cccdlflags="`echo $cccdlflags|sed 's/-fpic/-fPIC/'`" ;;
4cd66402 345 *-fPIC*) ;;
7cd1f58a
BJ
346 *) cccdlflags="$cccdlflags -fPIC" ;;
347 esac
348 ;;
349esac
350
f443a56e
JH
351# SuSE8.2 has /usr/lib/libndbm* which are ld scripts rather than
352# true libraries. The scripts cause binding against static
353# version of -lgdbm which is a bad idea. So if we have 'nm'
354# make sure it can read the file
355# NI-S 2003/08/07
70e1ff59
BF
356case "$nm" in
357 '') ;;
358 *)
359 for p in $plibpth
360 do
361 if $test -r $p/libndbm.so; then
362 if $nm $p/libndbm.so >/dev/null 2>&1 ; then
363 echo 'Your shared -lndbm seems to be a real library.'
364 _libndbm_real=1
365 break
366 fi
367 fi
368 done
369 if $test "X$_libndbm_real" = X; then
370 echo 'Your shared -lndbm is not a real library.'
371 set `echo X "$libswanted "| sed -e 's/ ndbm / /'`
372 shift
373 libswanted="$*"
374 fi
375 ;;
376esac
f443a56e 377
79a18634
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378# Linux on Synology.
379if [ -f /etc/synoinfo.conf -a -d /usr/syno ]; then
380 # Tested on Synology DS213 and DS413
381 # OS version info in /etc.defaults/VERSION
382 # http://forum.synology.com/wiki/index.php/What_kind_of_CPU_does_my_NAS_have
383 # Synology DS213 running DSM 4.3-3810-0 (2013-11-06)
384 # CPU model Marvell Kirkwood mv6282 ARMv5te
385 # Linux 2.6.32.12 #3810 Wed Nov 6 05:13:41 CST 2013 armv5tel GNU/Linux
386 # Synology DS413 running DSM 4.3-3810-0 (2013-11-06)
387 # CPU model Freescale QorIQ P1022 ppc (e500v2)
388 # linux 2.6.32.12 #3810 ppc GNU/Linux
389 # All development stuff installed with ipkg is in /opt
390 if [ "$LANG" = "" -o "$LANG" = "C" ]; then
391 echo 'Your LANG is safe'
392 else
393 echo 'Please set $LANG to "C". All other $LANG settings will cause havoc' >&4
394 LANG=C
395 fi
396 echo 'Setting up to use /opt/*' >&4
397 locincpth="/opt/include $locincpth"
398 libpth="/opt/lib $libpth"
399 libspth="/opt/lib $libspth"
400 loclibpth="/opt/lib $loclibpth"
401 # POSIX will not link without the pthread lib
402 libswanted="$libswanted pthread"
403 echo "$libswanted" >&4
404fi
f443a56e
JH
405
406# This script UU/usethreads.cbu will get 'called-back' by Configure
104d25b7
JH
407# after it has prompted the user for whether to use threads.
408cat > UU/usethreads.cbu <<'EOCBU'
409case "$usethreads" in
410$define|true|[yY]*)
d7c042c9 411 ccflags="-D_REENTRANT -D_GNU_SOURCE $ccflags"
5d3df70f
JS
412 if echo $libswanted | grep -v pthread >/dev/null
413 then
414 set `echo X "$libswanted "| sed -e 's/ c / pthread c /'`
415 shift
416 libswanted="$*"
417 fi
47b8d1e2 418
a48ec845
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419 # Somehow at least in Debian 2.2 these manage to escape
420 # the #define forest of <features.h> and <time.h> so that
c95a4480
JH
421 # the hasproto macro of Configure doesn't see these protos,
422 # even with the -D_GNU_SOURCE.
47b8d1e2 423
a48ec845 424 d_asctime_r_proto="$define"
47b8d1e2 425 d_crypt_r_proto="$define"
a48ec845
JH
426 d_ctime_r_proto="$define"
427 d_gmtime_r_proto="$define"
428 d_localtime_r_proto="$define"
01b53dac 429 d_random_r_proto="$define"
47b8d1e2 430
104d25b7
JH
431 ;;
432esac
433EOCBU
7f2eea8e
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434
435cat > UU/uselargefiles.cbu <<'EOCBU'
f443a56e 436# This script UU/uselargefiles.cbu will get 'called-back' by Configure
7f2eea8e
GS
437# after it has prompted the user for whether to use large files.
438case "$uselargefiles" in
439''|$define|true|[yY]*)
9422c00b 440# Keep this in the left margin.
45c9e83b 441ccflags_uselargefiles="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
9422c00b 442
45c9e83b 443 ccflags="$ccflags $ccflags_uselargefiles"
7f2eea8e
GS
444 ;;
445esac
446EOCBU
3fe280b7
SP
447
448# Purify fails to link Perl if a "-lc" is passed into its linker
449# due to duplicate symbols.
450case "$PURIFY" in
451$define|true|[yY]*)
452 set `echo X "$libswanted "| sed -e 's/ c / /'`
453 shift
454 libswanted="$*"
455 ;;
456esac
b1e55cab 457
c3faea48
JH
458# If using g++, the Configure scan for dlopen() and (especially)
459# dlerror() might fail, easier just to forcibly hint them in.
460case "$cc" in
461*g++*)
462 d_dlopen='define'
463 d_dlerror='define'
464 ;;
465esac
5d3df70f
JS
466
467# Under some circumstances libdb can get built in such a way as to
468# need pthread explicitly linked.
469
470libdb_needs_pthread="N"
471
472if echo " $libswanted " | grep -v " pthread " >/dev/null
473then
474 if echo " $libswanted " | grep " db " >/dev/null
475 then
476 for DBDIR in $glibpth
477 do
478 DBLIB="$DBDIR/libdb.so"
479 if [ -f $DBLIB ]
480 then
400f22b8 481 if ${nm:-nm} -u $DBLIB | grep pthread >/dev/null
5d3df70f
JS
482 then
483 if ldd $DBLIB | grep pthread >/dev/null
484 then
485 libdb_needs_pthread="N"
486 else
487 libdb_needs_pthread="Y"
488 fi
489 fi
490 fi
491 done
492 fi
493fi
494
495case "$libdb_needs_pthread" in
496 "Y")
497 libswanted="$libswanted pthread"
498 ;;
499esac