case "$0" in
*/*) cd `expr X$0 : 'X\(.*\)/'` ;;
esac
+
+if test -f config_h.SH -a ! -f config.h; then
+ . ./config_h.SH
+ CONFIG_H=already-done
+fi
+
+warn=''
+
+# Add -Wall for the core modules iff gcc and not already -Wall
+case "$gccversion" in
+'') ;;
+Intel*) ;; # The Intel C++ plays gcc on TV but is not really it.
+*) case "$ccflags" in
+ *-Wall*) ;;
+ *) warn="$warn -Wall" ;;
+ esac
+ ;;
+esac
+
+# Create a test source file for testing what options can be fed to
+# gcc in this system; include a selection of most common and commonly
+# hairy include files.
+
+cat >_cflags.c <<__EOT__
+#include "EXTERN.h"
+#include "perl.h"
+/* The stdio.h, errno.h, and setjmp.h should be there in any ANSI C89. */
+#include <stdio.h>
+#include <errno.h>
+#include <setjmp.h>
+/* Just in case the inclusion of perl.h did not
+ * pull in enough system headers, let's try again. */
+#ifdef I_STDLIB
+#include <stdlib.h>
+#endif
+#ifdef I_STDDEF
+#include <stddef.h>
+#endif
+#ifdef I_STDARG
+#include <stdarg.h>
+#endif
+#ifdef I_LIMITS
+#include <limits.h>
+#endif
+#ifdef I_DIRENT
+#include <dirent.h>
+#endif
+#ifdef I_UNISTD
+#include <unistd.h>
+#endif
+#ifdef I_SYS_TYPES
+#include <sys/types.h>
+#endif
+#ifdef I_SYS_PARAM
+#include <sys/param.h>
+#endif
+#ifdef I_SYS_RESOURCE
+#include <sys/resource.h>
+#endif
+#ifdef I_SYS_SELECT
+#include <sys/select.h>
+#endif
+#if defined(HAS_SOCKET) && !defined(VMS) && !defined(WIN32) /* See perl.h. */
+#include <sys/socket.h>
+#endif
+#ifdef I_SYS_STAT
+#include <sys/stat.h>
+#endif
+#ifdef I_SYS_TIME
+#include <sys/time.h>
+#endif
+#ifdef I_SYS_TIMES
+#include <sys/times.h>
+#endif
+#ifdef I_SYS_WAIT
+#include <sys/wait.h>
+#endif
+/* The gcc -ansi can cause a lot of noise in Solaris because of:
+ /usr/include/sys/resource.h:148: warning: 'struct rlimit64' declared inside parameter list
+ */
+int main(int argc, char *argv[]) {
+
+/* Add here test code found to be problematic in some gcc platform. */
+
+/* Off_t/off_t is a struct in Solaris with largefiles, and with gcc -ansi
+ * that struct cannot be compared in some gcc releases with a flat
+ * integer, such as a STRLEN. */
+
+ IV iv;
+ Off_t t0a = 2;
+ STRLEN t0b = 3;
+ int t0c = t0a == t0b;
+
+/* In FreeBSD 6.2 (and probably other releases too), with -Duse64bitint,
+ perl will use atoll(3). However, that declaration is hidden in <stdlib.h>
+ if we force the compiler to use -std=c89 mode.
+*/
+ iv = Atol("42");
+
+ return (!t0c && (iv == 42)) ? 0 : -1; /* Try to avoid 'unused' warnings. */
+}
+__EOT__
+
+stdflags=''
+
+# Further gcc warning options. Build up a list of options that work.
+# Note that some problems may only show up with combinations of options,
+# e.g. a warning might show up only with -Wall -ansi, not with either
+# one individually.
+# TODO: Ponder whether to migrate this back to Configure so hints files can
+# tweak it. Also, be paranoid about whether results we've deduced in Configure
+# (especially about things like long long, which are not in C89) will still be
+# valid if we now add flags like -std=c89.
+
+case "$gccversion" in
+'') ;;
+[12]*) ;; # gcc versions 1 (gasp!) and 2 are not good for this.
+Intel*) ;; # # Is that you, Intel C++?
+*) for opt in -ansi -std=c89 -W -Wextra -Wdeclaration-after-statement \
+ -Wendif-labels -Wc++-compat -Wwrite-strings
+ do
+ case " $ccflags " in
+ *" $opt "*) ;; # Skip if already there.
+ *) rm -f _cflags$_exe
+ case "`$cc $cflags $warn $stdflags $opt _cflags.c -o _cflags$_exe 2>&1`" in
+ *"unrecognized"*) ;;
+ *"implicit declaration"*) ;; # Was something useful hidden?
+ *"Invalid"*) ;;
+ *"is valid for C"*) ;;
+ *) if test -x _cflags$_exe
+ then
+ case "$opt" in
+ -std*) stdflags="$stdflags $opt" ;;
+ *) warn="$warn $opt" ;;
+ esac
+ fi
+ ;;
+ esac
+ ;;
+ esac
+ done
+ ;;
+esac
+rm -f _cflags.c _cflags$_exe
+
+case "$gccversion" in
+'') ;;
+*)
+ if [ "$gccansipedantic" = "" ]; then
+ # If we have -Duse64bitint (or equivalent) in effect and the quadtype
+ # has become 'long long', gcc -pedantic becomes unbearable (moreso
+ # when combined with -Wall) because long long and LL and %lld|%Ld
+ # become warn-worthy. So let's drop the -pedantic in that case.
+ case "$quadtype:$sPRId64" in
+ "long long"*|*lld*|*Ld*)
+ ccflags="`echo $ccflags|sed 's/-pedantic/ /'`"
+ warn="`echo $warn|sed 's/-pedantic/ /'`"
+ ;;
+ esac
+ # Similarly, since 'long long' isn't part of C89, FreeBSD 6.2 headers
+ # don't declare atoll() under -std=c89, but we need it. In general,
+ # insisting on -std=c89 is inconsistent with insisting on using
+ # 'long long'. So drop -std=c89 and -ansi as well if we're using
+ # 'long long' as our main integral type.
+ case "$ivtype" in
+ "long long")
+ ccflags=`echo $ccflags|sed -e 's/-pedantic/ /' -e 's/-std=c89/ /' -e 's/-ansi/ /'`
+ warn=`echo $warn|sed -e 's/-pedantic/ /' -e 's/-ansi/ /'`
+ stdflags=`echo $stdflags|sed -e 's/-std=c89/ /'`
+ ;;
+ esac
+ fi
+ # Using certain features (like the gcc statement expressions)
+ # requires knowing whether -pedantic has been specified.
+ case "$warn$ccflags" in
+ *-pedantic*) warn="$warn -DPERL_GCC_PEDANTIC" ;;
+ esac
+ ;;
+esac
+
+# Code to set any extra flags here.
+extra=''
+
echo "Extracting cflags (with variable substitutions)"
: This section of the file will have variable substitutions done on it.
: Move anything that needs config subs from !NO!SUBS! section to !GROK!THIS!.
rm -f cflags
$spitshell >cflags <<!GROK!THIS!
$startsh
+
+# Extra warnings, used e.g. for gcc.
+warn="$warn"
+# Extra standardness.
+stdflags="$stdflags"
+# Extra extra.
+extra="$extra"
+# what do executables look like?
+_exe="$_exe"
+
!GROK!THIS!
: In the following dollars and backticks do not need the extra backslash.
: or customize here
case "$file" in
- DB_File) ;;
- GDBM_File) ;;
- NDBM_File) ;;
- ODBM_File) ;;
- POSIX) ;;
- SDBM_File) ;;
- av) ;;
- byterun) ;;
- deb) ;;
- dl) ;;
- doio) ;;
- doop) ;;
- dump) ;;
- gv) ;;
- hv) ;;
- locale) ;;
- main) ;;
- malloc) ;;
- mg) ;;
- miniperlmain) ;;
- numeric) ;;
- op) ;;
- perl) ;;
- perlapi) ;;
- perlmain) ;;
- perly) ;;
- pp) ;;
- pp_ctl) ;;
- pp_hot) ;;
- pp_pack) ;;
- pp_sys) ;;
- regcomp) ;;
- regexec) ;;
- run) ;;
- scope) ;;
- sv) ;;
- taint) ;;
- toke) ;;
- usersub) ;;
- util) ;;
*) ;;
+
+ *) : Customization examples follow: ;;
+ av) ccflags=`echo $ccflags | sed -e s/-pipe//` ;;
+ deb) ccflags="$ccflags -fno-jump-tables" ;;
+ hv) warn=`echo $warn | sed -e s/-Wextra//` ;;
+ toke) optimize=-O0 ;;
esac
-warn=''
+ : The examples are intentionally unreachable as the '*)' case always
+ : matches. To use them, move before the '*)' and edit as appropriate.
+ : It is not a good idea to set ccflags to an absolute value here, as it
+ : often contains general -D defines which are needed for correct
+ : compilation. It is better to edit ccflags as shown, using interpolation
+ : to add flags, or sed to remove flags.
-# Add -Wall for the core modules iff gcc and not already -Wall
-case "$gccversion" in
-'') ;;
-Intel*) ;; # The Intel C++ plays gcc on TV but is not really it.
-*) case "$ccflags" in
- *-Wall*) ;;
- *) warn="$warn -Wall" ;;
- esac
- ;;
-esac
-# The gcc -ansi -pedantic require their own dance, too.
-case "$gccversion" in
-'') ;;
-Intel*) ;;
-*) case "$gccansipedantic" in
- define)
- case "$gccversion" in
- [12]*) ;; # gcc versions 1 (gasp!) and 2 are not good for this.
- *) case "$osname" in
- # Add -ansi -pedantic only for known platforms.
- aix|dec_osf|freebsd|hpux|irix|linux)
- ansipedantic="-ansi -pedantic" ;;
- solaris)
-# Can't add -ansi for Solaris.
-# Off_t/off_t is a struct in Solaris with largefiles, and with -ansi
-# that struct cannot be compared with a flat integer, such as a STRLEN.
-# The -ansi will also cause a lot of noise in Solaris because of:
-# /usr/include/sys/resource.h:148: warning: `struct rlimit64' declared inside parameter list
- ansipedantic="-pedantic" ;;
- esac
- for i in $ansipedantic
- do
- case "$ccflags" in
- *$i*) ;;
- *) warn="$warn $i" ;;
- esac
- done
- case "$warn$ccflags" in
- *-pedantic*) warn="$warn -DPERL_GCC_PEDANTIC" ;;
- esac
- ;;
- esac
- ;;
+ case "$cc" in
+ *g++*)
+ # Extra paranoia in case people have bad canned ccflags:
+ # bad in the sense that the flags are accepted by g++,
+ # but then whined about.
+ for f in -Wdeclaration-after-statement -std=c89
+ do
+ ccflags=`echo $ccflags|sed 's/$f/ /'`
+ done
+ ;;
esac
- ;;
-esac
+ cppflags=`echo $cppflags|sed 's/-Wdeclaration-after-statement/ /'`
-# Further gcc warning options.
-case "$gccversion" in
-'') ;;
-Intel*) ;;
-*) for opt in '' extra declaration-after-statement endif-labels
- do
- case " $ccflags " in
- *"-W$opt "*) ;;
- *) case "`echo | $cc -W$opt -E - 2>&1`" in
- *"unrecognized"*) ;;
- *) warn="$warn -W$opt" ;;
- esac
- ;;
- esac
- done
- ;;
-esac
+ case "$cc" in
+ *clang)
+ # clang complains a lot about -Wunused-value which are not fixable
+ warn="$warn -Wno-unused-value"
+ ;;
+ *g++*)
+ # Without -Wno-unused-variable g++ 4.x compiles are rather unwatchable
+ # because of all the warnings about Perl___notused, and g++ doesn't do
+ # __attribute__((unused)) (and even if at some stage it may, people do
+ # have older gcc installations), and ((void)x) isn't enough to silence
+ # the noises about XS functions not using their cv parameter, so we need
+ # the -Wno-unused-parameter too.
+ # Yes, we lose some valid warnings, but hopefully other compilers
+ # (like gcc) will still pick up those warnings.
+ for o in -Wno-unused-variable -Wno-unused-parameter
+ do
+ case "$warn" in
+ *$o*) ;;
+ *) warn="$warn $o" ;;
+ esac
+ done
+ ;;
+ esac
-if test -f .patch; then
- ccflags="-DPERL_PATCHNUM=`cat .patch` $ccflags"
-fi
: Can we perhaps use $ansi2knr here
- echo "$cc -c -DPERL_CORE $ccflags $optimize $warn"
- eval "$also "'"$cc -DPERL_CORE -c $ccflags $optimize $warn"'
+ echo "$cc -c -DPERL_CORE $ccflags $stdflags $optimize $warn $extra"
+ eval "$also "'"$cc -DPERL_CORE -c $ccflags $stdflags $optimize $warn $extra"'
. $TOP/config.sh
+ # end per file behaviour
done
!NO!SUBS!
chmod 755 cflags
https://perl5.git.perl.org / perl5.git / blobdiff