This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
Unicode::Normalize needs CombiningClass.pl
[perl5.git] / cflags.SH
CommitLineData
1f00b0d6
S
1#!/bin/sh
2
cb9238a7 3# Generate the cflags script, which is used to determine what cflags
ea14a82d
JH
4# to pass to the compiler for compiling the core perl.
5#
6# This does NOT affect the XS compilation (ext, dist, cpan)
7# since that uses %Config values directly.
8#
9# For example, since -Wall adds -Wunused-*, a bare -Wall (without
10# amending that with -Wno-unused-..., or with the PERL_UNUSED_...)
11# would be too much for XS code because there are too many generated
12# but often unused things.
13#
14# We create a temporary test C program and repeatedly compile it with
cb9238a7
DM
15# various candidate flags, and from the compiler output, determine what
16# flags are supported.
ea14a82d 17#
cb9238a7
DM
18# From this we initialise the following variables in the cflags script:
19#
ea14a82d 20# $myccflags (possibly edited version of $Config{ccflags})
cb9238a7
DM
21# $warn
22# $stdflags
23# $extra
24# $_exe
25
a02608de 26case $PERL_CONFIG_SH in
1c3d792e 27'')
a0d0e21e
LW
28 if test -f config.sh; then TOP=.;
29 elif test -f ../config.sh; then TOP=..;
30 elif test -f ../../config.sh; then TOP=../..;
31 elif test -f ../../../config.sh; then TOP=../../..;
32 elif test -f ../../../../config.sh; then TOP=../../../..;
33 else
34 echo "Can't find config.sh."; exit 1
35 fi
36 . $TOP/config.sh
37 ;;
1c3d792e 38esac
44213caa
DM
39# This forces SH files to create target in same directory as SH file.
40# This is so that make depend always knows where to find SH derivatives.
1c3d792e
LW
41case "$0" in
42*/*) cd `expr X$0 : 'X\(.*\)/'` ;;
43esac
bc730b18 44
37723ebb 45if test -f config_h.SH -a ! -f config.h; then
6ef8aa7c 46 . ./config_h.SH
11e2f395 47 CONFIG_H=already-done
6ef8aa7c
RGS
48fi
49
bc730b18
JH
50warn=''
51
52# Add -Wall for the core modules iff gcc and not already -Wall
53case "$gccversion" in
54'') ;;
55Intel*) ;; # The Intel C++ plays gcc on TV but is not really it.
56*) case "$ccflags" in
57 *-Wall*) ;;
58 *) warn="$warn -Wall" ;;
59 esac
60 ;;
61esac
62
a07cd53d
JH
63# Create a test source file for testing what options can be fed to
64# gcc in this system; include a selection of most common and commonly
65# hairy include files.
66
67cat >_cflags.c <<__EOT__
68#include "EXTERN.h"
69#include "perl.h"
70/* The stdio.h, errno.h, and setjmp.h should be there in any ANSI C89. */
71#include <stdio.h>
72#include <errno.h>
73#include <setjmp.h>
74/* Just in case the inclusion of perl.h did not
75 * pull in enough system headers, let's try again. */
76#ifdef I_STDLIB
77#include <stdlib.h>
78#endif
79#ifdef I_STDDEF
80#include <stddef.h>
81#endif
82#ifdef I_STDARG
83#include <stdarg.h>
84#endif
85#ifdef I_LIMITS
86#include <limits.h>
87#endif
88#ifdef I_DIRENT
89#include <dirent.h>
90#endif
91#ifdef I_UNISTD
92#include <unistd.h>
93#endif
463bdbaf 94#ifdef I_SYS_TYPES
a07cd53d
JH
95#include <sys/types.h>
96#endif
463bdbaf 97#ifdef I_SYS_PARAM
a07cd53d
JH
98#include <sys/param.h>
99#endif
463bdbaf 100#ifdef I_SYS_RESOURCE
a07cd53d
JH
101#include <sys/resource.h>
102#endif
463bdbaf 103#ifdef I_SYS_SELECT
a07cd53d
JH
104#include <sys/select.h>
105#endif
106#if defined(HAS_SOCKET) && !defined(VMS) && !defined(WIN32) /* See perl.h. */
107#include <sys/socket.h>
108#endif
463bdbaf 109#ifdef I_SYS_STAT
a07cd53d
JH
110#include <sys/stat.h>
111#endif
463bdbaf 112#ifdef I_SYS_TIME
a07cd53d
JH
113#include <sys/time.h>
114#endif
463bdbaf 115#ifdef I_SYS_TIMES
a07cd53d
JH
116#include <sys/times.h>
117#endif
463bdbaf 118#ifdef I_SYS_WAIT
a07cd53d
JH
119#include <sys/wait.h>
120#endif
121/* The gcc -ansi can cause a lot of noise in Solaris because of:
122 /usr/include/sys/resource.h:148: warning: 'struct rlimit64' declared inside parameter list
123 */
124int main(int argc, char *argv[]) {
125
126/* Add here test code found to be problematic in some gcc platform. */
127
128/* Off_t/off_t is a struct in Solaris with largefiles, and with gcc -ansi
129 * that struct cannot be compared in some gcc releases with a flat
130 * integer, such as a STRLEN. */
131
215ed6ce 132 IV iv;
a07cd53d
JH
133 Off_t t0a = 2;
134 STRLEN t0b = 3;
f049db42
JH
135 int t0c = (STRLEN)t0a == t0b;
136
137 printf("%s: %d\n", argv[0], argc);
a07cd53d 138
215ed6ce
AD
139/* In FreeBSD 6.2 (and probably other releases too), with -Duse64bitint,
140 perl will use atoll(3). However, that declaration is hidden in <stdlib.h>
141 if we force the compiler to use -std=c89 mode.
142*/
143 iv = Atol("42");
144
145 return (!t0c && (iv == 42)) ? 0 : -1; /* Try to avoid 'unused' warnings. */
a07cd53d
JH
146}
147__EOT__
148
149stdflags=''
bc730b18 150
215ed6ce
AD
151# Further gcc warning options. Build up a list of options that work.
152# Note that some problems may only show up with combinations of options,
153# e.g. a warning might show up only with -Wall -ansi, not with either
154# one individually.
813665af 155# TODO: Ponder whether to migrate this back to Configure so hints files can
215ed6ce 156# tweak it. Also, be paranoid about whether results we've deduced in Configure
813665af 157# (especially about things like long long, which are not in C89) will still be
215ed6ce
AD
158# valid if we now add flags like -std=c89.
159
f049db42
JH
160pedantic=''
161case "$gccansipedantic" in
162define) pedantic='-pedantic' ;;
163esac
164
bc730b18
JH
165case "$gccversion" in
166'') ;;
a07cd53d
JH
167[12]*) ;; # gcc versions 1 (gasp!) and 2 are not good for this.
168Intel*) ;; # # Is that you, Intel C++?
f049db42 169#
fd9d4a0b 170# NOTE 1: the -std=c89 without -pedantic is a bit pointless.
abf4b099 171# Just -std=c89 means "if there is room for interpretation,
f049db42
JH
172# interpret the C89 way." It does NOT mean "strict C89" on its own.
173# You need to add the -pedantic for that. To do this with Configure,
174# do -Dgccansipedantic (note that the -ansi is included in any case,
175# the option is a bit oddly named, for historical reasons.)
176#
177# NOTE 2: -pedantic necessitates adding a couple of flags:
178# * -PERL_GCC_PEDANTIC so that the perl code can adapt: there's nothing
179# added by gcc itself to indicate pedanticness.
180# * -Wno-overlength-strings under -DDEBUGGING because quite many of
181# the LEAVE_with_name() and assert() calls generate string literals
182# longer then the ANSI minimum of 509 bytes.
183#
184# NOTE 3: the relative order of these options matters:
bf78513f
JH
185# -Wextra before -W
186# -std=c89 before -ansi
187# -pedantic* before -Werror=d-a-s
abf4b099 188#
bf78513f 189*) for opt in -std=c89 -ansi $pedantic \
d2d49204 190 -Werror=declaration-after-statement \
f049db42 191 -Wextra -W \
fae2e960 192 -Wc++-compat -Wwrite-strings
bc730b18
JH
193 do
194 case " $ccflags " in
a07cd53d
JH
195 *" $opt "*) ;; # Skip if already there.
196 *) rm -f _cflags$_exe
f049db42
JH
197 flags="-DPERL_NO_INLINE_FUNCTIONS $ccflags $warn $stdflags $opt"
198 case "$opt" in
199 *-pedantic*) flags="$flags -DPERL_GCC_PEDANTIC" ;;
200 esac
201 # echo "opt = $opt, flags = $flags"
202 cmd="$cc $flags _cflags.c -o _cflags$_exe"
203 out="`$cmd 2>&1`"
204 # echo "$cmd --> $out"
205 case "$out" in
bc730b18 206 *"unrecognized"*) ;;
d39195d4 207 *"unknown"*) ;;
215ed6ce 208 *"implicit declaration"*) ;; # Was something useful hidden?
bc730b18 209 *"Invalid"*) ;;
9ac4c107 210 *"is valid for C"*) ;;
a07cd53d
JH
211 *) if test -x _cflags$_exe
212 then
213 case "$opt" in
be5a9ab8
JH
214 -std*)
215 echo "cflags.SH: Adding $opt."
216 stdflags="$stdflags $opt"
217 ;;
bf78513f
JH
218 -ansi)
219 # -std=c89 is the modern form of -ansi, so add
220 # -ansi only if -std=c89 is not there already.
221 case " $stdflags " in
222 *-std=c89*) ;;
223 *)
224 echo "cflags.SH: Adding $opt."
225 stdflags="$stdflags $opt"
226 ;;
227 esac
228 ;;
905ccdc7
JH
229 *) case "$opt" in
230 -W)
231 # -Wextra is the modern form of -W, so add
232 # -W only if -Wextra is not there already.
233 case " $warn " in
234 *-Wextra*) ;;
be5a9ab8
JH
235 *)
236 echo "cflags.SH: Adding $opt."
f049db42 237 warn="$warn $opt"
be5a9ab8 238 ;;
905ccdc7
JH
239 esac
240 ;;
f049db42
JH
241 -Werror=declaration-after-statement)
242 # -pedantic* (with -std=c89) covers -Werror=d-a-s.
243 case "$stdflags$warn" in
244 *-std=c89*-pedantic*|*-pedantic*-std=c89*) ;;
245 *)
246 echo "cflags.SH: Adding $opt."
247 warn="$warn $opt"
248 ;;
249 esac
250 ;;
be5a9ab8
JH
251 *)
252 echo "cflags.SH: Adding $opt."
253 warn="$warn $opt"
254 ;;
905ccdc7 255 esac
a07cd53d
JH
256 esac
257 fi
258 ;;
bc730b18
JH
259 esac
260 ;;
261 esac
f049db42
JH
262 case "$ccflags$warn" in
263 *-pedantic*)
264 overlength=''
265 case "$ccflags$optimize" in
266 *-DDEBUGGING*) overlength='-Wno-overlength-strings' ;;
267 esac
268 for opt2 in -DPERL_GCC_PEDANTIC $overlength
269 do
270 case "$ccflags$warn" in
271 *"$opt2"*) ;;
272 *) echo "cflags.SH: Adding $opt2 because of -pedantic."
273 warn="$warn $opt2" ;;
274 esac
275 done
276 ;;
277 esac
bc730b18
JH
278 done
279 ;;
280esac
a07cd53d 281rm -f _cflags.c _cflags$_exe
bc730b18 282
9ac4c107
JH
283case "$gccversion" in
284'') ;;
285*)
f049db42
JH
286 case "$warn$ccflags" in
287 *-pedantic*)
3e8416a3 288 # If we have -Duse64bitint (or equivalent) in effect and the quadtype
f049db42
JH
289 # has become 'long long', gcc -pedantic* becomes unbearable
290 # (moreso when combined with -Wall) because long long and LL and %lld|%Ld
3e8416a3 291 # become warn-worthy. So let's drop the -pedantic in that case.
f049db42 292 #
215ed6ce
AD
293 # Similarly, since 'long long' isn't part of C89, FreeBSD 6.2 headers
294 # don't declare atoll() under -std=c89, but we need it. In general,
295 # insisting on -std=c89 is inconsistent with insisting on using
813665af 296 # 'long long'. So drop -std=c89 and -ansi as well if we're using
215ed6ce 297 # 'long long' as our main integral type.
f049db42
JH
298 #
299 # usedtrace (DTrace) uses unportable features (dollars in identifiers,
300 # and gcc statement expressions), it is just easier to turn off pedantic.
301 remove=''
302 case "$quadtype:$ivtype:$sPRId64:$usedtrace" in
303 *"long long"*|*lld*|*Ld*) remove='long long' ;;
304 *) case "$usedtrace" in
305 define) remove='usedtrace' ;;
306 esac
307 ;;
308 esac
309 case "$remove" in
310 '') ;;
311 *) echo "cflags.SH: Removing -pedantic*, -std=c89, and -ansi because of $remove."
312 ccflags=`echo $ccflags|sed -e 's/-pedantic-errors/ /' -e 's/-pedantic/ /' -e 's/-std=c89/ /' -e 's/-ansi/ /' -e 's/-DPERL_GCC_PEDANTIC/ /'`
313 warn=`echo $warn|sed -e 's/-pedantic-errors/ /' -e 's/-pedantic/ /' -e 's/-ansi/ /' -e 's/-DPERL_GCC_PEDANTIC/ /'`
314 stdflags=`echo $stdflags|sed -e 's/-std=c89/ /'`
315 ;;
215ed6ce 316 esac
5bd6d383
JH
317 ;;
318 esac
319 ;;
320esac
321
c57c0df9
JH
322# Older clang releases are not wise enough for -Wunused-value.
323case "$gccversion" in
324*"Apple LLVM "[34]*|*"Apple LLVM version "[34]*)
325 for f in -Wno-unused-value
326 do
327 echo "cflags.SH: Adding $f because clang version '$gccversion'"
328 warn="$warn $f"
329 done
330 ;;
331esac
332
78e91e3f
JH
333# The quadmath Q format specifier will cause -Wformat to whine.
334case "$gccversion" in
335'') ;;
336*) case "$usequadmath" in
337 define)
338 for f in -Wno-format
339 do
340 echo "cflags.SH: Adding $f because of usequadmath."
341 warn="$warn $f"
342 done
343 ;;
344 esac
345 ;;
346esac
347
5bd6d383
JH
348case "$cc" in
349*g++*)
350 # Extra paranoia in case people have bad canned ccflags:
351 # bad in the sense that the flags are accepted by g++,
352 # but then whined about.
d2d49204
JH
353 #
354 # -Werror=d-a-s option is valid for g++, by definition,
355 # but we remove it just for cleanliness and shorter command lines.
356 for f in -Wdeclaration-after-statement \
357 -Werror=declaration-after-statement \
49c60343 358 -Wc++-compat \
d2d49204 359 -std=c89
5bd6d383 360 do
95f0c784 361 case "$ccflags$warn" in
5bd6d383 362 *"$f"*)
95f0c784
JH
363 echo "cflags.SH: Removing $f because of g++."
364 ccflags=`echo $ccflags|sed 's/$f/ /'`
365 warn=`echo $warn|sed 's/$f/ /'`
366 ;;
5bd6d383
JH
367 esac
368 done
369 ;;
370esac
371
d2d49204 372for f in -Wdeclaration-after-statement -Werror=declaration-after-statement
5bd6d383
JH
373do
374 case "$cppflags" in
375 *"$f"*)
376 echo "cflags.SH: Removing $f from cppflags."
377 cppflags=`echo $cppflags|sed 's/$f/ /'` ;;
378 esac
379done
380
f049db42
JH
381echo "cflags.SH: cc = $cc"
382echo "cflags.SH: ccflags = $ccflags"
383echo "cflags.SH: stdflags = $stdflags"
384echo "cflags.SH: optimize = $optimize"
385echo "cflags.SH: warn = $warn"
386
10edeb5d 387# Code to set any extra flags here.
a07cd53d 388extra=''
11fcce85 389
2b317908 390echo "Extracting cflags (with variable substitutions)"
44213caa
DM
391# This section of the file will have variable substitutions done on it.
392# Move anything that needs config subs from !NO!SUBS! section to !GROK!THIS!.
393# Protect any dollar signs and backticks that you do not want interpreted
394# by putting a backslash in front. You may delete these comments.
165b7424 395rm -f cflags
2b317908 396$spitshell >cflags <<!GROK!THIS!
ecfc5424 397$startsh
bc730b18 398
cb9238a7
DM
399# !!!!!!! DO NOT EDIT THIS FILE !!!!!!!
400
401# This file is generated by cflags.SH
402
5bd6d383 403# Used to restore possible edits by cflags.SH.
57d2761b 404myccflags="$ccflags"
11fcce85 405# Extra warnings, used e.g. for gcc.
bc730b18 406warn="$warn"
11fcce85
JH
407# Extra standardness.
408stdflags="$stdflags"
b1e55cab
JH
409# Extra extra.
410extra="$extra"
dcff826f
YO
411# what do executables look like?
412_exe="$_exe"
bc730b18 413
2b317908
LW
414!GROK!THIS!
415
44213caa 416# In the following dollars and backticks do not need the extra backslash.
2b317908 417$spitshell >>cflags <<'!NO!SUBS!'
a02608de 418case $PERL_CONFIG_SH in
2b317908 419'')
a0d0e21e
LW
420 if test -f config.sh; then TOP=.;
421 elif test -f ../config.sh; then TOP=..;
422 elif test -f ../../config.sh; then TOP=../..;
423 elif test -f ../../../config.sh; then TOP=../../..;
424 elif test -f ../../../../config.sh; then TOP=../../../..;
425 else
426 echo "Can't find config.sh."; exit 1
427 fi
428 . $TOP/config.sh
57d2761b 429 ccflags="$myccflags" # Restore possible edits by cflags.SH.
a0d0e21e
LW
430 ;;
431esac
432
ba0f5503
DM
433# syntax: cflags [optimize=XXX] [file[.suffix]] ...
434# displays the proposed compiler command line for each 'file'
435#
436# with no file, dispalys it for all *.c files.
437# The optimise=XXX arg (if present) is evalled, setting the default
438# value of the $optimise variable, which is output on the command line
439# (but which may be overridden for specific files below)
75550b4e 440
1167a30e 441case "X$1" in
26102cc7 442Xoptimize=*|X"optimize=*")
1167a30e
IZ
443 eval "$1"
444 shift
445 ;;
446esac
447
1c3d792e
LW
448case $# in
4490) set *.c; echo "The current C flags are:" ;;
1c3d792e 450esac
2b317908 451
578789a7 452set `echo "$* " | sed -e 's/\.[oc] / /g' -e 's/\.obj / /g' -e "s/\\$obj_ext / /g"`
2b317908 453
1c3d792e
LW
454for file do
455
456 case "$#" in
457 1) ;;
2b317908 458 *) echo $n " $file.c $c" ;;
1c3d792e
LW
459 esac
460
44213caa 461 # allow variables like toke_cflags to be evaluated
2b317908 462
8736538c
AS
463 if echo $file | grep -v / >/dev/null
464 then
465 eval 'eval ${'"${file}_cflags"'-""}'
466 fi
2b317908 467
44213caa 468 # or customize here
2b317908 469
1c3d792e 470 case "$file" in
1197364c
NT
471 regcomp) : work around http://bugs.debian.org/754054
472 case $archname in
473 mips-*|mipsel-*)
474 optimize="$optimize -fno-tree-vrp";;
475 esac;;
1c3d792e 476 *) ;;
5729ffdd 477
5bd6d383
JH
478 # Customization examples follow.
479 #
480 # The examples are intentionally unreachable as the '*)' case above always
44213caa
DM
481 # matches. To use them, move before the '*)' and edit as appropriate.
482 # It is not a good idea to set ccflags to an absolute value here, as it
483 # often contains general -D defines which are needed for correct
484 # compilation. It is better to edit ccflags as shown, using interpolation
485 # to add flags, or sed to remove flags.
5729ffdd 486
5bd6d383
JH
487 av) ccflags=`echo $ccflags | sed -e s/-pipe//` ;;
488 deb) ccflags="$ccflags -fno-jump-tables" ;;
489 hv) warn=`echo $warn | sed -e s/-Wextra//` ;;
490 toke) optimize=-O0 ;;
7e827271 491 esac
666ea192 492
44213caa 493 # Can we perhaps use $ansi2knr here
b1e55cab 494 echo "$cc -c -DPERL_CORE $ccflags $stdflags $optimize $warn $extra"
2b317908 495
a0d0e21e 496 . $TOP/config.sh
2b317908 497
a7d59441 498 # end per file behaviour
1c3d792e 499done
2b317908 500!NO!SUBS!
a0d0e21e 501chmod 755 cflags
2b317908 502$eunicefix cflags