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perltodo.pod: Add more detail about @INC order.
[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
69#ifdef I_SYSTYPES
70#include <sys/types.h>
71#endif
72#ifdef I_SYSPARAM
73#include <sys/param.h>
74#endif
75#ifdef I_SYSRESOURCE
76#include <sys/resource.h>
77#endif
78#ifdef I_SYSSELECT
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
84#ifdef I_SYSSTAT
85#include <sys/stat.h>
86#endif
87#ifdef I_SYSTIME
88#include <sys/time.h>
89#endif
90#ifdef I_SYSTIMES
91#include <sys/times.h>
92#endif
93#ifdef I_SYSWAIT
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
107 Off_t t0a = 2;
108 STRLEN t0b = 3;
109 int t0c = t0a == t0b;
110
111 return 0;
112}
113__EOT__
114
115stdflags=''
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116
117# Further gcc warning options.
118case "$gccversion" in
119'') ;;
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120[12]*) ;; # gcc versions 1 (gasp!) and 2 are not good for this.
121Intel*) ;; # # Is that you, Intel C++?
c94db568 122*) for opt in -ansi -pedantic -std=c89 -W -Wextra -Wdeclaration-after-statement -Wendif-labels -Wc++-compat
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123 do
124 case " $ccflags " in
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125 *" $opt "*) ;; # Skip if already there.
126 *) rm -f _cflags$_exe
127 case "`$cc $cflags $opt _cflags.c -o _cflags$_exe 2>&1`" in
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128 *"unrecognized"*) ;;
129 *"Invalid"*) ;;
9ac4c107 130 *"is valid for C"*) ;;
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131 *) if test -x _cflags$_exe
132 then
133 case "$opt" in
134 -std*) stdflags="$stdflags $opt" ;;
135 *) warn="$warn $opt" ;;
136 esac
137 fi
138 ;;
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139 esac
140 ;;
141 esac
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142 done
143 ;;
144esac
a07cd53d 145rm -f _cflags.c _cflags$_exe
bc730b18 146
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147case "$gccversion" in
148'') ;;
149*)
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150 if [ "$gccansipedantic" = "" ]; then
151 # If we have -Duse64bitint (or equivalent) in effect and the quadtype
152 # has become 'long long', gcc -pedantic becomes unbearable (moreso
153 # when combined with -Wall) because long long and LL and %lld|%Ld
154 # become warn-worthy. So let's drop the -pedantic in that case.
155 case "$quadtype:$sPRId64" in
156 "long long"*|*lld*|*Ld*)
157 ccflags="`echo $ccflags|sed 's/-pedantic/ /'`"
158 warn="`echo $warn|sed 's/-pedantic/ /'`"
159 ;;
160 esac
161 fi
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162 # Using certain features (like the gcc statement expressions)
163 # requires knowing whether -pedantic has been specified.
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164 case "$warn$ccflags" in
165 *-pedantic*) warn="$warn -DPERL_GCC_PEDANTIC" ;;
166 esac
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167 ;;
168esac
b1e55cab 169
10edeb5d 170# Code to set any extra flags here.
a07cd53d 171extra=''
11fcce85 172
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173echo "Extracting cflags (with variable substitutions)"
174: This section of the file will have variable substitutions done on it.
175: Move anything that needs config subs from !NO!SUBS! section to !GROK!THIS!.
176: Protect any dollar signs and backticks that you do not want interpreted
177: by putting a backslash in front. You may delete these comments.
165b7424 178rm -f cflags
2b317908 179$spitshell >cflags <<!GROK!THIS!
ecfc5424 180$startsh
bc730b18 181
11fcce85 182# Extra warnings, used e.g. for gcc.
bc730b18 183warn="$warn"
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184# Extra standardness.
185stdflags="$stdflags"
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186# Extra extra.
187extra="$extra"
bc730b18 188
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189!GROK!THIS!
190
191: In the following dollars and backticks do not need the extra backslash.
192$spitshell >>cflags <<'!NO!SUBS!'
a02608de 193case $PERL_CONFIG_SH in
2b317908 194'')
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195 if test -f config.sh; then TOP=.;
196 elif test -f ../config.sh; then TOP=..;
197 elif test -f ../../config.sh; then TOP=../..;
198 elif test -f ../../../config.sh; then TOP=../../..;
199 elif test -f ../../../../config.sh; then TOP=../../../..;
200 else
201 echo "Can't find config.sh."; exit 1
202 fi
203 . $TOP/config.sh
204 ;;
205esac
206
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207: syntax: cflags [optimize=XXX] [file[.suffix]]
208: displays the compiler command line for file
209
1167a30e 210case "X$1" in
26102cc7 211Xoptimize=*|X"optimize=*")
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212 eval "$1"
213 shift
214 ;;
215esac
216
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217also=': '
218case $# in
2b317908 2191) also='echo 1>&2 " CCCMD = "'
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220esac
221
222case $# in
2230) set *.c; echo "The current C flags are:" ;;
1c3d792e 224esac
2b317908 225
578789a7 226set `echo "$* " | sed -e 's/\.[oc] / /g' -e 's/\.obj / /g' -e "s/\\$obj_ext / /g"`
2b317908 227
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228for file do
229
230 case "$#" in
231 1) ;;
2b317908 232 *) echo $n " $file.c $c" ;;
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233 esac
234
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235 : allow variables like toke_cflags to be evaluated
236
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237 if echo $file | grep -v / >/dev/null
238 then
239 eval 'eval ${'"${file}_cflags"'-""}'
240 fi
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241
242 : or customize here
243
1c3d792e 244 case "$file" in
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245 DB_File) ;;
246 GDBM_File) ;;
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247 NDBM_File) ;;
248 ODBM_File) ;;
249 POSIX) ;;
250 SDBM_File) ;;
251 av) ;;
4b6be2dd 252 byterun) ;;
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253 deb) ;;
254 dl) ;;
2b317908 255 doio) ;;
2304df62 256 doop) ;;
2b317908 257 dump) ;;
59bea8cf 258 globals) ;;
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259 gv) ;;
260 hv) ;;
a6ec74c1 261 locale) ;;
59bea8cf 262 madly) ;;
2304df62 263 main) ;;
2b317908 264 malloc) ;;
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265 mg) ;;
266 miniperlmain) ;;
a6ec74c1 267 numeric) ;;
2304df62 268 op) ;;
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269 opmini) ;;
270 pad) ;;
2b317908 271 perl) ;;
6f4183fe 272 perlapi) ;;
2304df62 273 perlmain) ;;
2b317908 274 perly) ;;
2304df62 275 pp) ;;
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276 pp_ctl) ;;
277 pp_hot) ;;
a6ec74c1 278 pp_pack) ;;
59bea8cf 279 pp_sort) ;;
a0d0e21e 280 pp_sys) ;;
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281 regcomp) ;;
282 regexec) ;;
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283 run) ;;
284 scope) ;;
285 sv) ;;
286 taint) ;;
2b317908 287 toke) ;;
59bea8cf 288 universal) ;;
2b317908 289 usersub) ;;
59bea8cf 290 utf8) ;;
2b317908 291 util) ;;
59bea8cf 292 xsutils) ;;
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293 *) ;;
294 esac
295
666ea192 296case "$cc" in
7e827271 297*g++*)
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298 # Extra paranoia in case people have bad canned ccflags:
299 # bad in the sense that the flags are accepted by g++,
300 # but then whined about.
301 for f in -Wdeclaration-after-statement -std=c89
302 do
59497074 303 ccflags=`echo $ccflags|sed 's/$f/ /'`
9ac4c107 304 done
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305 ;;
306esac
4f3b19ea 307cppflags=`echo $cppflags|sed 's/-Wdeclaration-after-statement/ /'`
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308
309case "$cc" in
310*g++*)
311 # Without -Wno-unused-variable g++ 4.x compiles are rather unwatchable
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312 # because of all the warnings about Perl___notused, and g++ doesn't do
313 # __attribute__((unused)) (and even if at some stage it may, people do
314 # have older gcc installations), and ((void)x) isn't enough to silence
315 # the noises about XS functions not using their cv parameter, so we need
316 # the -Wno-unused-parameter too.
317 # Yes, we lose some valid warnings, but hopefully other compilers
318 # (like gcc) will still pick up those warnings.
319 for o in -Wno-unused-variable -Wno-unused-parameter
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320 do
321 case "$warn" in
322 *$o*) ;;
323 *) warn="$warn $o" ;;
324 esac
325 done
326 ;;
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327esac
328
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329if test -f .patch; then
330 ccflags="-DPERL_PATCHNUM=`cat .patch` $ccflags"
331fi
332
c4f23d77 333 : Can we perhaps use $ansi2knr here
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334 echo "$cc -c -DPERL_CORE $ccflags $stdflags $optimize $warn $extra"
335 eval "$also "'"$cc -DPERL_CORE -c $ccflags $stdflags $optimize $warn $extra"'
2b317908 336
a0d0e21e 337 . $TOP/config.sh
2b317908 338
1c3d792e 339done
2b317908 340!NO!SUBS!
a0d0e21e 341chmod 755 cflags
2b317908 342$eunicefix cflags