This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
A new try at getting -fstack-protector working, by adding it to the
[perl5.git] / cflags.SH
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a02608de 1case $PERL_CONFIG_SH in
1c3d792e 2'')
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3 if test -f config.sh; then TOP=.;
4 elif test -f ../config.sh; then TOP=..;
5 elif test -f ../../config.sh; then TOP=../..;
6 elif test -f ../../../config.sh; then TOP=../../..;
7 elif test -f ../../../../config.sh; then TOP=../../../..;
8 else
9 echo "Can't find config.sh."; exit 1
10 fi
11 . $TOP/config.sh
12 ;;
1c3d792e 13esac
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14: This forces SH files to create target in same directory as SH file.
15: This is so that make depend always knows where to find SH derivatives.
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16case "$0" in
17*/*) cd `expr X$0 : 'X\(.*\)/'` ;;
18esac
bc730b18 19
37723ebb 20if test -f config_h.SH -a ! -f config.h; then
6ef8aa7c 21 . ./config_h.SH
11e2f395 22 CONFIG_H=already-done
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23fi
24
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25warn=''
26
27# Add -Wall for the core modules iff gcc and not already -Wall
28case "$gccversion" in
29'') ;;
30Intel*) ;; # The Intel C++ plays gcc on TV but is not really it.
31*) case "$ccflags" in
32 *-Wall*) ;;
33 *) warn="$warn -Wall" ;;
34 esac
35 ;;
36esac
37
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38# Create a test source file for testing what options can be fed to
39# gcc in this system; include a selection of most common and commonly
40# hairy include files.
41
42cat >_cflags.c <<__EOT__
43#include "EXTERN.h"
44#include "perl.h"
45/* The stdio.h, errno.h, and setjmp.h should be there in any ANSI C89. */
46#include <stdio.h>
47#include <errno.h>
48#include <setjmp.h>
49/* Just in case the inclusion of perl.h did not
50 * pull in enough system headers, let's try again. */
51#ifdef I_STDLIB
52#include <stdlib.h>
53#endif
54#ifdef I_STDDEF
55#include <stddef.h>
56#endif
57#ifdef I_STDARG
58#include <stdarg.h>
59#endif
60#ifdef I_LIMITS
61#include <limits.h>
62#endif
63#ifdef I_DIRENT
64#include <dirent.h>
65#endif
66#ifdef I_UNISTD
67#include <unistd.h>
68#endif
463bdbaf 69#ifdef I_SYS_TYPES
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70#include <sys/types.h>
71#endif
463bdbaf 72#ifdef I_SYS_PARAM
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73#include <sys/param.h>
74#endif
463bdbaf 75#ifdef I_SYS_RESOURCE
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76#include <sys/resource.h>
77#endif
463bdbaf 78#ifdef I_SYS_SELECT
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79#include <sys/select.h>
80#endif
81#if defined(HAS_SOCKET) && !defined(VMS) && !defined(WIN32) /* See perl.h. */
82#include <sys/socket.h>
83#endif
463bdbaf 84#ifdef I_SYS_STAT
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85#include <sys/stat.h>
86#endif
463bdbaf 87#ifdef I_SYS_TIME
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88#include <sys/time.h>
89#endif
463bdbaf 90#ifdef I_SYS_TIMES
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91#include <sys/times.h>
92#endif
463bdbaf 93#ifdef I_SYS_WAIT
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94#include <sys/wait.h>
95#endif
96/* The gcc -ansi can cause a lot of noise in Solaris because of:
97 /usr/include/sys/resource.h:148: warning: 'struct rlimit64' declared inside parameter list
98 */
99int main(int argc, char *argv[]) {
100
101/* Add here test code found to be problematic in some gcc platform. */
102
103/* Off_t/off_t is a struct in Solaris with largefiles, and with gcc -ansi
104 * that struct cannot be compared in some gcc releases with a flat
105 * integer, such as a STRLEN. */
106
215ed6ce 107 IV iv;
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108 Off_t t0a = 2;
109 STRLEN t0b = 3;
110 int t0c = t0a == t0b;
111
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112/* In FreeBSD 6.2 (and probably other releases too), with -Duse64bitint,
113 perl will use atoll(3). However, that declaration is hidden in <stdlib.h>
114 if we force the compiler to use -std=c89 mode.
115*/
116 iv = Atol("42");
117
118 return (!t0c && (iv == 42)) ? 0 : -1; /* Try to avoid 'unused' warnings. */
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119}
120__EOT__
121
122stdflags=''
bc730b18 123
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124# Further gcc warning options. Build up a list of options that work.
125# Note that some problems may only show up with combinations of options,
126# e.g. a warning might show up only with -Wall -ansi, not with either
127# one individually.
128# TODO: Ponder whether to migrate this back to Configure so hints files can
129# tweak it. Also, be paranoid about whether results we've deduced in Configure
130# (especially about things like long long, which are not in C89) will still be
131# valid if we now add flags like -std=c89.
132
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133case "$gccversion" in
134'') ;;
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135[12]*) ;; # gcc versions 1 (gasp!) and 2 are not good for this.
136Intel*) ;; # # Is that you, Intel C++?
6682be1c 137*) for opt in -ansi -pedantic -std=c89 -W -Wextra -Wdeclaration-after-statement -Wendif-labels -Wc++-compat
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138 do
139 case " $ccflags " in
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140 *" $opt "*) ;; # Skip if already there.
141 *) rm -f _cflags$_exe
463bdbaf 142 case "`$cc $cflags $warn $stdflags $opt _cflags.c -o _cflags$_exe 2>&1`" in
bc730b18 143 *"unrecognized"*) ;;
215ed6ce 144 *"implicit declaration"*) ;; # Was something useful hidden?
bc730b18 145 *"Invalid"*) ;;
9ac4c107 146 *"is valid for C"*) ;;
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147 *) if test -x _cflags$_exe
148 then
149 case "$opt" in
150 -std*) stdflags="$stdflags $opt" ;;
151 *) warn="$warn $opt" ;;
152 esac
153 fi
154 ;;
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155 esac
156 ;;
157 esac
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158 done
159 ;;
160esac
a07cd53d 161rm -f _cflags.c _cflags$_exe
bc730b18 162
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163case "$gccversion" in
164'') ;;
165*)
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166 if [ "$gccansipedantic" = "" ]; then
167 # If we have -Duse64bitint (or equivalent) in effect and the quadtype
168 # has become 'long long', gcc -pedantic becomes unbearable (moreso
169 # when combined with -Wall) because long long and LL and %lld|%Ld
170 # become warn-worthy. So let's drop the -pedantic in that case.
171 case "$quadtype:$sPRId64" in
172 "long long"*|*lld*|*Ld*)
173 ccflags="`echo $ccflags|sed 's/-pedantic/ /'`"
174 warn="`echo $warn|sed 's/-pedantic/ /'`"
175 ;;
176 esac
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177 # Similarly, since 'long long' isn't part of C89, FreeBSD 6.2 headers
178 # don't declare atoll() under -std=c89, but we need it. In general,
179 # insisting on -std=c89 is inconsistent with insisting on using
180 # 'long long'. So drop -std=c89 and -ansi as well if we're using
181 # 'long long' as our main integral type.
182 case "$ivtype" in
183 "long long")
184 ccflags=`echo $ccflags|sed -e 's/-pedantic/ /' -e 's/-std=c89/ /' -e 's/-ansi/ /'`
185 warn=`echo $warn|sed -e 's/-pedantic/ /' -e 's/-ansi/ /'`
a5105380 186 stdflags=`echo $stdflags|sed -e 's/-std=c89/ /'`
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187 ;;
188 esac
3e8416a3 189 fi
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190 # Using certain features (like the gcc statement expressions)
191 # requires knowing whether -pedantic has been specified.
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192 case "$warn$ccflags" in
193 *-pedantic*) warn="$warn -DPERL_GCC_PEDANTIC" ;;
194 esac
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195 ;;
196esac
b1e55cab 197
10edeb5d 198# Code to set any extra flags here.
a07cd53d 199extra=''
11fcce85 200
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201echo "Extracting cflags (with variable substitutions)"
202: This section of the file will have variable substitutions done on it.
203: Move anything that needs config subs from !NO!SUBS! section to !GROK!THIS!.
204: Protect any dollar signs and backticks that you do not want interpreted
205: by putting a backslash in front. You may delete these comments.
165b7424 206rm -f cflags
2b317908 207$spitshell >cflags <<!GROK!THIS!
ecfc5424 208$startsh
bc730b18 209
11fcce85 210# Extra warnings, used e.g. for gcc.
bc730b18 211warn="$warn"
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212# Extra standardness.
213stdflags="$stdflags"
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214# Extra extra.
215extra="$extra"
bc730b18 216
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217!GROK!THIS!
218
219: In the following dollars and backticks do not need the extra backslash.
220$spitshell >>cflags <<'!NO!SUBS!'
a02608de 221case $PERL_CONFIG_SH in
2b317908 222'')
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223 if test -f config.sh; then TOP=.;
224 elif test -f ../config.sh; then TOP=..;
225 elif test -f ../../config.sh; then TOP=../..;
226 elif test -f ../../../config.sh; then TOP=../../..;
227 elif test -f ../../../../config.sh; then TOP=../../../..;
228 else
229 echo "Can't find config.sh."; exit 1
230 fi
231 . $TOP/config.sh
232 ;;
233esac
234
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235: syntax: cflags [optimize=XXX] [file[.suffix]]
236: displays the compiler command line for file
237
1167a30e 238case "X$1" in
26102cc7 239Xoptimize=*|X"optimize=*")
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240 eval "$1"
241 shift
242 ;;
243esac
244
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245also=': '
246case $# in
2b317908 2471) also='echo 1>&2 " CCCMD = "'
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248esac
249
250case $# in
2510) set *.c; echo "The current C flags are:" ;;
1c3d792e 252esac
2b317908 253
578789a7 254set `echo "$* " | sed -e 's/\.[oc] / /g' -e 's/\.obj / /g' -e "s/\\$obj_ext / /g"`
2b317908 255
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256for file do
257
258 case "$#" in
259 1) ;;
2b317908 260 *) echo $n " $file.c $c" ;;
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261 esac
262
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263 : allow variables like toke_cflags to be evaluated
264
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265 if echo $file | grep -v / >/dev/null
266 then
267 eval 'eval ${'"${file}_cflags"'-""}'
268 fi
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269
270 : or customize here
271
1c3d792e 272 case "$file" in
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273 DB_File) ;;
274 GDBM_File) ;;
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275 NDBM_File) ;;
276 ODBM_File) ;;
277 POSIX) ;;
278 SDBM_File) ;;
279 av) ;;
4b6be2dd 280 byterun) ;;
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281 deb) ;;
282 dl) ;;
2b317908 283 doio) ;;
2304df62 284 doop) ;;
2b317908 285 dump) ;;
59bea8cf 286 globals) ;;
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287 gv) ;;
288 hv) ;;
a6ec74c1 289 locale) ;;
59bea8cf 290 madly) ;;
2304df62 291 main) ;;
2b317908 292 malloc) ;;
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293 mg) ;;
294 miniperlmain) ;;
a6ec74c1 295 numeric) ;;
2304df62 296 op) ;;
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297 opmini) ;;
298 pad) ;;
2b317908 299 perl) ;;
6f4183fe 300 perlapi) ;;
2304df62 301 perlmain) ;;
2b317908 302 perly) ;;
2304df62 303 pp) ;;
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304 pp_ctl) ;;
305 pp_hot) ;;
a6ec74c1 306 pp_pack) ;;
59bea8cf 307 pp_sort) ;;
a0d0e21e 308 pp_sys) ;;
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309 regcomp) ;;
310 regexec) ;;
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311 run) ;;
312 scope) ;;
313 sv) ;;
314 taint) ;;
2b317908 315 toke) ;;
59bea8cf 316 universal) ;;
2b317908 317 usersub) ;;
59bea8cf 318 utf8) ;;
2b317908 319 util) ;;
59bea8cf 320 xsutils) ;;
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321 *) ;;
322 esac
323
666ea192 324case "$cc" in
7e827271 325*g++*)
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326 # Extra paranoia in case people have bad canned ccflags:
327 # bad in the sense that the flags are accepted by g++,
328 # but then whined about.
329 for f in -Wdeclaration-after-statement -std=c89
330 do
59497074 331 ccflags=`echo $ccflags|sed 's/$f/ /'`
9ac4c107 332 done
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333 ;;
334esac
4f3b19ea 335cppflags=`echo $cppflags|sed 's/-Wdeclaration-after-statement/ /'`
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336
337case "$cc" in
338*g++*)
339 # Without -Wno-unused-variable g++ 4.x compiles are rather unwatchable
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340 # because of all the warnings about Perl___notused, and g++ doesn't do
341 # __attribute__((unused)) (and even if at some stage it may, people do
342 # have older gcc installations), and ((void)x) isn't enough to silence
343 # the noises about XS functions not using their cv parameter, so we need
344 # the -Wno-unused-parameter too.
345 # Yes, we lose some valid warnings, but hopefully other compilers
346 # (like gcc) will still pick up those warnings.
347 for o in -Wno-unused-variable -Wno-unused-parameter
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348 do
349 case "$warn" in
350 *$o*) ;;
351 *) warn="$warn $o" ;;
352 esac
353 done
354 ;;
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355esac
356
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357if test -f .patch; then
358 ccflags="-DPERL_PATCHNUM=`cat .patch` $ccflags"
359fi
360
c4f23d77 361 : Can we perhaps use $ansi2knr here
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362 echo "$cc -c -DPERL_CORE $ccflags $stdflags $optimize $warn $extra"
363 eval "$also "'"$cc -DPERL_CORE -c $ccflags $stdflags $optimize $warn $extra"'
2b317908 364
a0d0e21e 365 . $TOP/config.sh
2b317908 366
1c3d792e 367done
2b317908 368!NO!SUBS!
a0d0e21e 369chmod 755 cflags
2b317908 370$eunicefix cflags