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Minor hints/linux.sh patch to allow setting -Doptimize
[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#
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 14
15# Updated Fri Jun 21 11:07:54 EDT 1996
16# NDBM support for ELF renabled by <kjahds@kjahds.com>
232e078e 17
f3db1d4d
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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 "$libswanted "| sed -e 's/ bsd / /' -e 's/ net / /' -e 's/ bind / /'`
4bf4dbb3 54shift
55libswanted="$*"
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
a4ea3e34
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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 "$usemallocwrap" in
77'') usemallocwrap='define' ;;
78esac
79
f443a56e 80# The system malloc() is about as fast and as frugal as perl's.
c3404dc3
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81# Since the system malloc() has been the default since at least
82# 5.001, we might as well leave it that way. --AD 10 Jan 2002
c07a80fd 83case "$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 $ccflags"
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94 # If we're using ICC, we usually want the best performance
95 case "$optimize" in
96 '') optimize='-O3' ;;
97 esac
98 ;;
6452e86c 99*"Sun C"*)
395ff119 100 test "$optimize" || optimize='-xO2'
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101 cccdlflags='-KPIC'
102 lddlflags='-G -Bdynamic'
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103 # Sun C doesn't support gcc attributes, but, in many cases, doesn't
104 # complain either. Not all cases, though.
105 d_attribute_format='undef'
106 d_attribute_malloc='undef'
107 d_attribute_nonnull='undef'
108 d_attribute_noreturn='undef'
109 d_attribute_pure='undef'
110 d_attribute_unused='undef'
111 d_attribute_warn_unused_result='undef'
6452e86c 112 ;;
06d57135
MHM
113esac
114
1aef975c 115case "$optimize" in
051e4fe1 116# use -O2 by default ; -O3 doesn't seem to bring significant benefits with gcc
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117'')
118 optimize='-O2'
119 case "`uname -m`" in
120 ppc*)
121 # on ppc, it seems that gcc (at least gcc 3.3.2) isn't happy
f88ad257 122 # with -O2 ; so downgrade to -O1.
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123 optimize='-O1'
124 ;;
f88ad257
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125 ia64*)
126 # This architecture has had various problems with gcc's
127 # in the 3.2, 3.3, and 3.4 releases when optimized to -O2. See
128 # RT #37156 for a discussion of the problem.
129 case "`${cc:-gcc} -v 2>&1`" in
130 *"version 3.2"*|*"version 3.3"*|*"version 3.4"*)
131 ccflags="-fno-delete-null-pointer-checks $ccflags"
132 ;;
133 esac
134 ;;
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135 esac
136 ;;
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137esac
138
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139# Are we using ELF? Thanks to Kenneth Albanowski <kjahds@kjahds.com>
140# for this test.
141cat >try.c <<'EOM'
142/* Test for whether ELF binaries are produced */
143#include <fcntl.h>
144#include <stdlib.h>
b1e55cab 145#include <unistd.h>
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146main() {
147 char buffer[4];
148 int i=open("a.out",O_RDONLY);
149 if(i==-1)
150 exit(1); /* fail */
151 if(read(i,&buffer[0],4)<4)
152 exit(1); /* fail */
153 if(buffer[0] != 127 || buffer[1] != 'E' ||
154 buffer[2] != 'L' || buffer[3] != 'F')
155 exit(1); /* fail */
156 exit(0); /* succeed (yes, it's ELF) */
157}
158EOM
5440bc8e 159if ${cc:-gcc} try.c >/dev/null 2>&1 && $run ./a.out; then
ef0c9946 160 cat <<'EOM' >&4
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161
162You appear to have ELF support. I'll try to use it for dynamic loading.
ef0c9946 163If dynamic loading doesn't work, read hints/linux.sh for further information.
232e078e 164EOM
ef0c9946 165
232e078e 166else
ef0c9946 167 cat <<'EOM' >&4
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168
169You don't have an ELF gcc. I will use dld if possible. If you are
170using a version of DLD earlier than 3.2.6, or don't have it at all, you
171should probably upgrade. If you are forced to use 3.2.4, you should
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172uncomment a couple of lines in hints/linux.sh and restart Configure so
173that shared libraries will be disallowed.
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174
175EOM
232e078e 176 lddlflags="-r $lddlflags"
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177 # These empty values are so that Configure doesn't put in the
178 # Linux ELF values.
179 ccdlflags=' '
180 cccdlflags=' '
c07a80fd 181 ccflags="-DOVR_DBL_DIG=14 $ccflags"
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182 so='sa'
183 dlext='o'
a5f75d66 184 nm_so_opt=' '
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185 ## If you are using DLD 3.2.4 which does not support shared libs,
186 ## uncomment the next two lines:
187 #ldflags="-static"
188 #so='none'
ef0c9946 189
190 # In addition, on some systems there is a problem with perl and NDBM
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191 # which causes AnyDBM and NDBM_File to lock up. This is evidenced
192 # in the tests as AnyDBM just freezing. Apparently, this only
ef0c9946 193 # happens on a.out systems, so we disable NDBM for all a.out linux
194 # systems. If someone can suggest a more robust test
195 # that would be appreciated.
196 #
197 # More info:
198 # Date: Wed, 7 Feb 1996 03:21:04 +0900
199 # From: Jeffrey Friedl <jfriedl@nff.ncl.omron.co.jp>
200 #
201 # I tried compiling with DBM support and sure enough things locked up
202 # just as advertised. Checking into it, I found that the lockup was
203 # during the call to dbm_open. Not *in* dbm_open -- but between the call
204 # to and the jump into.
f443a56e 205 #
ef0c9946 206 # To make a long story short, making sure that the *.a and *.sa pairs of
207 # /usr/lib/lib{m,db,gdbm}.{a,sa}
208 # were perfectly in sync took care of it.
209 #
210 # This will generate a harmless Whoa There! message
211 case "$d_dbm_open" in
212 '') cat <<'EOM' >&4
213
214Disabling ndbm. This will generate a Whoa There message in Configure.
215Read hints/linux.sh for further information.
216EOM
217 # You can override this with Configure -Dd_dbm_open
218 d_dbm_open=undef
219 ;;
220 esac
232e078e 221fi
a0d0e21e 222
c2960299 223rm -f try.c a.out
16d20bd9 224
e218ce4d 225if /bin/sh -c exit; then
284c50cc
MDLR
226 echo ''
227 echo 'You appear to have a working bash. Good.'
c2960299 228else
ef0c9946 229 cat << 'EOM' >&4
a0d0e21e 230
ef0c9946 231*********************** Warning! *********************
232It would appear you have a defective bash shell installed. This is likely to
233give you a failure of op/exec test #5 during the test phase of the build,
234Upgrading to a recent version (1.14.4 or later) should fix the problem.
235******************************************************
a0d0e21e 236EOM
c2960299
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237
238fi
16d20bd9 239
284c50cc
MDLR
240# On SPARClinux,
241# The following csh consistently coredumped in the test directory
242# "/home/mikedlr/perl5.003_94/t", though not most other directories.
243
244#Name : csh Distribution: Red Hat Linux (Rembrandt)
245#Version : 5.2.6 Vendor: Red Hat Software
246#Release : 3 Build Date: Fri May 24 19:42:14 1996
247#Install date: Thu Jul 11 16:20:14 1996 Build Host: itchy.redhat.com
248#Group : Shells Source RPM: csh-5.2.6-3.src.rpm
249#Size : 184417
250#Description : BSD c-shell
251
252# For this reason I suggest using the much bug-fixed tcsh for globbing
253# where available.
254
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JH
255# November 2001: That warning's pretty old now and probably not so
256# relevant, especially since perl now uses File::Glob for globbing.
257# We'll still look for tcsh, but tone down the warnings.
258# Andy Dougherty, Nov. 6, 2001
259if $csh -c 'echo $version' >/dev/null 2>&1; then
260 echo 'Your csh is really tcsh. Good.'
261else
99cae59c 262 if xxx=`./UU/loc tcsh blurfl $pth`; $test -f "$xxx"; then
46fc3d4c 263 echo "Found tcsh. I'll use it for globbing."
264 # We can't change Configure's setting of $csh, due to the way
265 # Configure handles $d_portable and commands found in $loclist.
266 # We can set the value for CSH in config.h by setting full_csh.
267 full_csh=$xxx
3d413b55
JH
268 elif [ -f "$csh" ]; then
269 echo "Couldn't find tcsh. Csh-based globbing might be broken."
46fc3d4c 270 fi
284c50cc 271fi
dc66995c 272
92526645
CN
273# Shimpei Yamashita <shimpei@socrates.patnet.caltech.edu>
274# Message-Id: <33EF1634.B36B6500@pobox.com>
f443a56e 275#
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JH
276# The DR2 of MkLinux (osname=linux,archname=ppc-linux) may need
277# special flags passed in order for dynamic loading to work.
92526645 278# instead of the recommended:
17ff8a05 279#
92526645 280# ccdlflags='-rdynamic'
f443a56e 281#
92526645
CN
282# it should be:
283# ccdlflags='-Wl,-E'
17ff8a05
JH
284#
285# So if your DR2 (DR3 came out summer 1998, consider upgrading)
286# has problems with dynamic loading, uncomment the
287# following three lines, make distclean, and re-Configure:
288#case "`uname -r | sed 's/^[0-9.-]*//'``arch`" in
289#'osfmach3ppc') ccdlflags='-Wl,-E' ;;
290#esac
92526645 291
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AD
292case "`uname -m`" in
293sparc*)
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BJ
294 case "$cccdlflags" in
295 *-fpic*) cccdlflags="`echo $cccdlflags|sed 's/-fpic/-fPIC/'`" ;;
4cd66402 296 *-fPIC*) ;;
7cd1f58a
BJ
297 *) cccdlflags="$cccdlflags -fPIC" ;;
298 esac
299 ;;
300esac
301
f443a56e
JH
302# SuSE8.2 has /usr/lib/libndbm* which are ld scripts rather than
303# true libraries. The scripts cause binding against static
304# version of -lgdbm which is a bad idea. So if we have 'nm'
305# make sure it can read the file
306# NI-S 2003/08/07
307if [ -r /usr/lib/libndbm.so -a -x /usr/bin/nm ] ; then
308 if /usr/bin/nm /usr/lib/libndbm.so >/dev/null 2>&1 ; then
309 echo 'Your shared -lndbm seems to be a real library.'
310 else
311 echo 'Your shared -lndbm is not a real library.'
312 set `echo X "$libswanted "| sed -e 's/ ndbm / /'`
313 shift
314 libswanted="$*"
315 fi
316fi
317
318
319# This script UU/usethreads.cbu will get 'called-back' by Configure
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JH
320# after it has prompted the user for whether to use threads.
321cat > UU/usethreads.cbu <<'EOCBU'
bb47c233
RGS
322if getconf GNU_LIBPTHREAD_VERSION | grep NPTL >/dev/null 2>/dev/null
323then
324 threadshavepids=""
325else
326 threadshavepids="-DTHREADS_HAVE_PIDS"
327fi
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JH
328case "$usethreads" in
329$define|true|[yY]*)
bb47c233 330 ccflags="-D_REENTRANT -D_GNU_SOURCE $threadshavepids $ccflags"
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331 if echo $libswanted | grep -v pthread >/dev/null
332 then
333 set `echo X "$libswanted "| sed -e 's/ c / pthread c /'`
334 shift
335 libswanted="$*"
336 fi
47b8d1e2 337
a48ec845
JH
338 # Somehow at least in Debian 2.2 these manage to escape
339 # the #define forest of <features.h> and <time.h> so that
c95a4480
JH
340 # the hasproto macro of Configure doesn't see these protos,
341 # even with the -D_GNU_SOURCE.
47b8d1e2 342
a48ec845 343 d_asctime_r_proto="$define"
47b8d1e2 344 d_crypt_r_proto="$define"
a48ec845
JH
345 d_ctime_r_proto="$define"
346 d_gmtime_r_proto="$define"
347 d_localtime_r_proto="$define"
01b53dac 348 d_random_r_proto="$define"
47b8d1e2 349
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JH
350 ;;
351esac
352EOCBU
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353
354cat > UU/uselargefiles.cbu <<'EOCBU'
f443a56e 355# This script UU/uselargefiles.cbu will get 'called-back' by Configure
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356# after it has prompted the user for whether to use large files.
357case "$uselargefiles" in
358''|$define|true|[yY]*)
9422c00b 359# Keep this in the left margin.
45c9e83b 360ccflags_uselargefiles="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
9422c00b 361
45c9e83b 362 ccflags="$ccflags $ccflags_uselargefiles"
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GS
363 ;;
364esac
365EOCBU
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SP
366
367# Purify fails to link Perl if a "-lc" is passed into its linker
368# due to duplicate symbols.
369case "$PURIFY" in
370$define|true|[yY]*)
371 set `echo X "$libswanted "| sed -e 's/ c / /'`
372 shift
373 libswanted="$*"
374 ;;
375esac
b1e55cab
JH
376
377# If we are using g++ we must use nm and force ourselves to use
378# the /usr/lib/libc.a (resetting the libc below to an empty string
379# makes Configure to look for the right one) because the symbol
380# scanning tricks of Configure will crash and burn horribly.
381case "$cc" in
382*g++*) usenm=true
383 libc=''
384 ;;
385esac
386
c3faea48
JH
387# If using g++, the Configure scan for dlopen() and (especially)
388# dlerror() might fail, easier just to forcibly hint them in.
389case "$cc" in
390*g++*)
391 d_dlopen='define'
392 d_dlerror='define'
393 ;;
394esac
5d3df70f
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395
396# Under some circumstances libdb can get built in such a way as to
397# need pthread explicitly linked.
398
399libdb_needs_pthread="N"
400
401if echo " $libswanted " | grep -v " pthread " >/dev/null
402then
403 if echo " $libswanted " | grep " db " >/dev/null
404 then
405 for DBDIR in $glibpth
406 do
407 DBLIB="$DBDIR/libdb.so"
408 if [ -f $DBLIB ]
409 then
410 if nm -u $DBLIB | grep pthread >/dev/null
411 then
412 if ldd $DBLIB | grep pthread >/dev/null
413 then
414 libdb_needs_pthread="N"
415 else
416 libdb_needs_pthread="Y"
417 fi
418 fi
419 fi
420 done
421 fi
422fi
423
424case "$libdb_needs_pthread" in
425 "Y")
426 libswanted="$libswanted pthread"
427 ;;
428esac