X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/6ef8aa7c9cfbc9b6bc5d5b07d6e1506e3058b4aa..dd8fc02804485f0ffdfd876c119b4f9500c7be86:/cflags.SH diff --git a/cflags.SH b/cflags.SH index 62d19d6..f57cf2f 100755 --- a/cflags.SH +++ b/cflags.SH @@ -17,8 +17,9 @@ case "$0" in */*) cd `expr X$0 : 'X\(.*\)/'` ;; esac -if ! test -f config.h; then +if test -f config_h.SH -a ! -f config.h; then . ./config_h.SH + CONFIG_H=already-done fi warn='' @@ -65,31 +66,31 @@ cat >_cflags.c <<__EOT__ #ifdef I_UNISTD #include #endif -#ifdef I_SYSTYPES +#ifdef I_SYS_TYPES #include #endif -#ifdef I_SYSPARAM +#ifdef I_SYS_PARAM #include #endif -#ifdef I_SYSRESOURCE +#ifdef I_SYS_RESOURCE #include #endif -#ifdef I_SYSSELECT +#ifdef I_SYS_SELECT #include #endif #if defined(HAS_SOCKET) && !defined(VMS) && !defined(WIN32) /* See perl.h. */ #include #endif -#ifdef I_SYSSTAT +#ifdef I_SYS_STAT #include #endif -#ifdef I_SYSTIME +#ifdef I_SYS_TIME #include #endif -#ifdef I_SYSTIMES +#ifdef I_SYS_TIMES #include #endif -#ifdef I_SYSWAIT +#ifdef I_SYS_WAIT #include #endif /* The gcc -ansi can cause a lot of noise in Solaris because of: @@ -103,28 +104,45 @@ int main(int argc, char *argv[]) { * 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; - return 0; +/* In FreeBSD 6.2 (and probably other releases too), with -Duse64bitint, + perl will use atoll(3). However, that declaration is hidden in + 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. +# 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 -pedantic -std=c89 -W -Wextra -Wdeclaration-after-statement -Wendif-labels +*) 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 $opt _cflags.c -o _cflags$_exe 2>&1`" in + 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$_exe @@ -157,6 +175,18 @@ case "$gccversion" in 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 $stdflags|sed -e 's/-std=c89/ /'` + ;; + esac fi # Using certain features (like the gcc statement expressions) # requires knowing whether -pedantic has been specified. @@ -184,6 +214,8 @@ warn="$warn" stdflags="$stdflags" # Extra extra. extra="$extra" +# what do executables look like? +_exe="$_exe" !GROK!THIS! @@ -288,45 +320,42 @@ for file do usersub) ;; utf8) ;; util) ;; - xsutils) ;; *) ;; esac -case "$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 - -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 $o" ;; + case "$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 + cppflags=`echo $cppflags|sed 's/-Wdeclaration-after-statement/ /'` + + case "$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 - 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 $stdflags $optimize $warn $extra" @@ -334,6 +363,7 @@ fi . $TOP/config.sh + # end per file behaviour done !NO!SUBS! chmod 755 cflags