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In cflags.SH trim the case statement of file basenames.
[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++?
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137*) for opt in -ansi -std=c89 -W -Wextra -Wdeclaration-after-statement \
138 -Wendif-labels -Wc++-compat -Wwrite-strings
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139 do
140 case " $ccflags " in
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141 *" $opt "*) ;; # Skip if already there.
142 *) rm -f _cflags$_exe
463bdbaf 143 case "`$cc $cflags $warn $stdflags $opt _cflags.c -o _cflags$_exe 2>&1`" in
bc730b18 144 *"unrecognized"*) ;;
215ed6ce 145 *"implicit declaration"*) ;; # Was something useful hidden?
bc730b18 146 *"Invalid"*) ;;
9ac4c107 147 *"is valid for C"*) ;;
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148 *) if test -x _cflags$_exe
149 then
150 case "$opt" in
151 -std*) stdflags="$stdflags $opt" ;;
152 *) warn="$warn $opt" ;;
153 esac
154 fi
155 ;;
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156 esac
157 ;;
158 esac
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159 done
160 ;;
161esac
a07cd53d 162rm -f _cflags.c _cflags$_exe
bc730b18 163
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164case "$gccversion" in
165'') ;;
166*)
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167 if [ "$gccansipedantic" = "" ]; then
168 # If we have -Duse64bitint (or equivalent) in effect and the quadtype
169 # has become 'long long', gcc -pedantic becomes unbearable (moreso
170 # when combined with -Wall) because long long and LL and %lld|%Ld
171 # become warn-worthy. So let's drop the -pedantic in that case.
172 case "$quadtype:$sPRId64" in
173 "long long"*|*lld*|*Ld*)
174 ccflags="`echo $ccflags|sed 's/-pedantic/ /'`"
175 warn="`echo $warn|sed 's/-pedantic/ /'`"
176 ;;
177 esac
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178 # Similarly, since 'long long' isn't part of C89, FreeBSD 6.2 headers
179 # don't declare atoll() under -std=c89, but we need it. In general,
180 # insisting on -std=c89 is inconsistent with insisting on using
181 # 'long long'. So drop -std=c89 and -ansi as well if we're using
182 # 'long long' as our main integral type.
183 case "$ivtype" in
184 "long long")
185 ccflags=`echo $ccflags|sed -e 's/-pedantic/ /' -e 's/-std=c89/ /' -e 's/-ansi/ /'`
186 warn=`echo $warn|sed -e 's/-pedantic/ /' -e 's/-ansi/ /'`
a5105380 187 stdflags=`echo $stdflags|sed -e 's/-std=c89/ /'`
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188 ;;
189 esac
3e8416a3 190 fi
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191 # Using certain features (like the gcc statement expressions)
192 # requires knowing whether -pedantic has been specified.
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193 case "$warn$ccflags" in
194 *-pedantic*) warn="$warn -DPERL_GCC_PEDANTIC" ;;
195 esac
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196 ;;
197esac
b1e55cab 198
10edeb5d 199# Code to set any extra flags here.
a07cd53d 200extra=''
11fcce85 201
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202echo "Extracting cflags (with variable substitutions)"
203: This section of the file will have variable substitutions done on it.
204: Move anything that needs config subs from !NO!SUBS! section to !GROK!THIS!.
205: Protect any dollar signs and backticks that you do not want interpreted
206: by putting a backslash in front. You may delete these comments.
165b7424 207rm -f cflags
2b317908 208$spitshell >cflags <<!GROK!THIS!
ecfc5424 209$startsh
bc730b18 210
11fcce85 211# Extra warnings, used e.g. for gcc.
bc730b18 212warn="$warn"
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213# Extra standardness.
214stdflags="$stdflags"
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215# Extra extra.
216extra="$extra"
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217# what do executables look like?
218_exe="$_exe"
bc730b18 219
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220!GROK!THIS!
221
222: In the following dollars and backticks do not need the extra backslash.
223$spitshell >>cflags <<'!NO!SUBS!'
a02608de 224case $PERL_CONFIG_SH in
2b317908 225'')
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226 if test -f config.sh; then TOP=.;
227 elif test -f ../config.sh; then TOP=..;
228 elif test -f ../../config.sh; then TOP=../..;
229 elif test -f ../../../config.sh; then TOP=../../..;
230 elif test -f ../../../../config.sh; then TOP=../../../..;
231 else
232 echo "Can't find config.sh."; exit 1
233 fi
234 . $TOP/config.sh
235 ;;
236esac
237
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238: syntax: cflags [optimize=XXX] [file[.suffix]]
239: displays the compiler command line for file
240
1167a30e 241case "X$1" in
26102cc7 242Xoptimize=*|X"optimize=*")
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243 eval "$1"
244 shift
245 ;;
246esac
247
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248also=': '
249case $# in
2b317908 2501) also='echo 1>&2 " CCCMD = "'
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251esac
252
253case $# in
2540) set *.c; echo "The current C flags are:" ;;
1c3d792e 255esac
2b317908 256
578789a7 257set `echo "$* " | sed -e 's/\.[oc] / /g' -e 's/\.obj / /g' -e "s/\\$obj_ext / /g"`
2b317908 258
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259for file do
260
261 case "$#" in
262 1) ;;
2b317908 263 *) echo $n " $file.c $c" ;;
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264 esac
265
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266 : allow variables like toke_cflags to be evaluated
267
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268 if echo $file | grep -v / >/dev/null
269 then
270 eval 'eval ${'"${file}_cflags"'-""}'
271 fi
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272
273 : or customize here
274
1c3d792e 275 case "$file" in
1c3d792e 276 *) ;;
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277
278 *) : Customization examples follow: ;;
279 av) ccflags=`echo $ccflags | sed -e s/-pipe//` ;;
280 deb) ccflags="$ccflags -fno-jump-tables" ;;
281 hv) warn=`echo $warn | sed -e s/-Wextra//` ;;
282 toke) optimize=-O0 ;;
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283 esac
284
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285 : The examples are intentionally unreachable as the '*)' case always
286 : matches. To use them, move before the '*)' and edit as appropriate.
287 : It is not a good idea to set ccflags to an absolute value here, as it
288 : often contains general -D defines which are needed for correct
289 : compilation. It is better to edit ccflags as shown, using interpolation
290 : to add flags, or sed to remove flags.
291
292
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293 case "$cc" in
294 *g++*)
295 # Extra paranoia in case people have bad canned ccflags:
296 # bad in the sense that the flags are accepted by g++,
297 # but then whined about.
298 for f in -Wdeclaration-after-statement -std=c89
299 do
300 ccflags=`echo $ccflags|sed 's/$f/ /'`
301 done
302 ;;
303 esac
304 cppflags=`echo $cppflags|sed 's/-Wdeclaration-after-statement/ /'`
305
306 case "$cc" in
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307 *clang)
308 # clang complains a lot about -Wunused-value which are not fixable
309 warn="$warn -Wno-unused-value"
310 ;;
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311 *g++*)
312 # Without -Wno-unused-variable g++ 4.x compiles are rather unwatchable
313 # because of all the warnings about Perl___notused, and g++ doesn't do
314 # __attribute__((unused)) (and even if at some stage it may, people do
315 # have older gcc installations), and ((void)x) isn't enough to silence
316 # the noises about XS functions not using their cv parameter, so we need
317 # the -Wno-unused-parameter too.
318 # Yes, we lose some valid warnings, but hopefully other compilers
319 # (like gcc) will still pick up those warnings.
320 for o in -Wno-unused-variable -Wno-unused-parameter
321 do
322 case "$warn" in
323 *$o*) ;;
324 *) warn="$warn $o" ;;
325 esac
326 done
327 ;;
7e827271 328 esac
666ea192 329
69c7f294 330
c4f23d77 331 : Can we perhaps use $ansi2knr here
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332 echo "$cc -c -DPERL_CORE $ccflags $stdflags $optimize $warn $extra"
333 eval "$also "'"$cc -DPERL_CORE -c $ccflags $stdflags $optimize $warn $extra"'
2b317908 334
a0d0e21e 335 . $TOP/config.sh
2b317908 336
a7d59441 337 # end per file behaviour
1c3d792e 338done
2b317908 339!NO!SUBS!
a0d0e21e 340chmod 755 cflags
2b317908 341$eunicefix cflags