X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=cflags.SH;h=ece6548aff481de52c683a61cd66be482773e4ff;hb=19908982fd40a3fcda3d18abed628060f59f2819;hp=1bd5c947f4e265e7fbe0f9e73012491d10645e0a;hpb=6a21b602731a3b9c2b1a55a63a48f5f4ab6dc73d;p=p5sagit%2Fp5-mst-13.2.git diff --git a/cflags.SH b/cflags.SH index 1bd5c94..ece6548 100755 --- a/cflags.SH +++ b/cflags.SH @@ -16,6 +16,153 @@ esac case "$0" in */*) cd `expr X$0 : 'X\(.*\)/'` ;; esac + +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="$warn -Wall" ;; + esac + ;; +esac + +# Create a test source file for testing what options can be fed to +# gcc in this system; include a selection of most common and commonly +# hairy include files. + +cat >_cflags.c <<__EOT__ +#include "EXTERN.h" +#include "perl.h" +/* The stdio.h, errno.h, and setjmp.h should be there in any ANSI C89. */ +#include +#include +#include +/* Just in case the inclusion of perl.h did not + * pull in enough system headers, let's try again. */ +#ifdef I_STDLIB +#include +#endif +#ifdef I_STDDEF +#include +#endif +#ifdef I_STDARG +#include +#endif +#ifdef I_LIMITS +#include +#endif +#ifdef I_DIRENT +#include +#endif +#ifdef I_UNISTD +#include +#endif +#ifdef I_SYSTYPES +#include +#endif +#ifdef I_SYSPARAM +#include +#endif +#ifdef I_SYSRESOURCE +#include +#endif +#ifdef I_SYSSELECT +#include +#endif +#if defined(HAS_SOCKET) && !defined(VMS) && !defined(WIN32) /* See perl.h. */ +#include +#endif +#ifdef I_SYSSTAT +#include +#endif +#ifdef I_SYSTIME +#include +#endif +#ifdef I_SYSTIMES +#include +#endif +#ifdef I_SYSWAIT +#include +#endif +/* The gcc -ansi can cause a lot of noise in Solaris because of: + /usr/include/sys/resource.h:148: warning: 'struct rlimit64' declared inside parameter list + */ +int main(int argc, char *argv[]) { + +/* Add here test code found to be problematic in some gcc platform. */ + +/* Off_t/off_t is a struct in Solaris with largefiles, and with gcc -ansi + * that struct cannot be compared in some gcc releases with a flat + * integer, such as a STRLEN. */ + + Off_t t0a = 2; + STRLEN t0b = 3; + int t0c = t0a == t0b; + + return 0; +} +__EOT__ + +stdflags='' + +# Further gcc warning options. +case "$gccversion" in +'') ;; +[12]*) ;; # gcc versions 1 (gasp!) and 2 are not good for this. +Intel*) ;; # # Is that you, Intel C++? +*) for opt in -ansi -pedantic -std=c89 -W -Wextra -Wdeclaration-after-statement -Wendif-labels + do + case " $ccflags " in + *" $opt "*) ;; # Skip if already there. + *) rm -f _cflags$_exe + case "`$cc $cflags $opt _cflags.c -o _cflags$_exe 2>&1`" in + *"unrecognized"*) ;; + *"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 "$gccversion" in +'') ;; +*) + # If we have -Duse64bitint (or equivalent) in effect and the quadtype + # has become 'long long', gcc -pedantic becomes unbearable (moreso + # when combined with -Wall) because long long and LL and %lld|%Ld + # become warn-worthy. So let's drop the -pedantic in that case. + case "$quadtype:$sPRId64" in + "long long"*|*lld*|*Ld*) + ccflags="`echo $ccflags|sed 's/-pedantic/ /'`" + warn="`echo $warn|sed 's/-pedantic/ /'`" + ;; + esac + # Using certain features (like the gcc statement expressions) + # requires knowing whether -pedantic has been specified. + case "$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!. @@ -24,6 +171,14 @@ echo "Extracting cflags (with variable substitutions)" rm -f cflags $spitshell >cflags <&2 " CCCMD = "' @@ -104,15 +248,19 @@ for file do doio) ;; doop) ;; dump) ;; + globals) ;; gv) ;; hv) ;; locale) ;; + madly) ;; main) ;; malloc) ;; mg) ;; miniperlmain) ;; numeric) ;; op) ;; + opmini) ;; + pad) ;; perl) ;; perlapi) ;; perlmain) ;; @@ -121,6 +269,7 @@ for file do pp_ctl) ;; pp_hot) ;; pp_pack) ;; + pp_sort) ;; pp_sys) ;; regcomp) ;; regexec) ;; @@ -129,34 +278,53 @@ for file do sv) ;; taint) ;; toke) ;; + universal) ;; usersub) ;; + utf8) ;; util) ;; + xsutils) ;; *) ;; esac - if test "X$optdebug" != "X"; then - optimize="$optdebug" - fi +case "$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 -# Add -Wall for the core and core modules iff gcc and not already -Wall -warn='' -case "$gccversion" in -'') ;; -*) case "$ccflags" in - *-Wall*) ;; -# Can't add -ansi here because it will fail e.g. in 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 - *) warn='-Wall' ;; +case "$cc" in +*g++*) + # Without -Wno-unused-variable g++ 4.x compiles are rather unwatchable + # because of all the warnings about Perl___notused, and g++ doesn't do + # __attribute__((unused)) (and even if at some stage it may, people do + # have older gcc installations), and ((void)x) isn't enough to silence + # the noises about XS functions not using their cv parameter, so we need + # the -Wno-unused-parameter too. + # Yes, we lose some valid warnings, but hopefully other compilers + # (like gcc) will still pick up those warnings. + for o in -Wno-unused-variable -Wno-unused-parameter + do + case "$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 $perltype" - eval "$also "'"$cc -DPERL_CORE -c $ccflags $optimize $warn $perltype"' + echo "$cc -c -DPERL_CORE $ccflags $stdflags $optimize $warn $extra" + eval "$also "'"$cc -DPERL_CORE -c $ccflags $stdflags $optimize $warn $extra"' . $TOP/config.sh