X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/68decaef0a08fcd5db3193f825cfdfc539b67ccb..813665af02cd68c241724ba754a7a3378912226b:/cflags.SH diff --git a/cflags.SH b/cflags.SH old mode 100644 new mode 100755 index c1510ea..c166db3 --- a/cflags.SH +++ b/cflags.SH @@ -1,55 +1,365 @@ -case $CONFIG in +#!/bin/sh + +# Generate the cflags script, which is used to determine what cflags +# to pass to the compiler. +# We create a temporary test c program and repeatedly compile it with +# various candidate flags, and from the compiler output, determine what +# flags are supported. +# From this we initialise the following variables in the cflags script: +# +# $warn +# $stdflags +# $extra +# $_exe + +case $PERL_CONFIG_SH in '') - if test ! -f config.sh; then - ln ../config.sh . || \ - ln ../../config.sh . || \ - ln ../../../config.sh . || \ - (echo "Can't find config.sh."; exit 1) - fi - . ./config.sh - ;; + if test -f config.sh; then TOP=.; + elif test -f ../config.sh; then TOP=..; + elif test -f ../../config.sh; then TOP=../..; + elif test -f ../../../config.sh; then TOP=../../..; + elif test -f ../../../../config.sh; then TOP=../../../..; + else + echo "Can't find config.sh."; exit 1 + fi + . $TOP/config.sh + ;; esac -: This forces SH files to create target in same directory as SH file. -: This is so that make depend always knows where to find SH derivatives. +# This forces SH files to create target in same directory as SH file. +# This is so that make depend always knows where to find SH derivatives. 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 +#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_SYS_TYPES +#include +#endif +#ifdef I_SYS_PARAM +#include +#endif +#ifdef I_SYS_RESOURCE +#include +#endif +#ifdef I_SYS_SELECT +#include +#endif +#if defined(HAS_SOCKET) && !defined(VMS) && !defined(WIN32) /* See perl.h. */ +#include +#endif +#ifdef I_SYS_STAT +#include +#endif +#ifdef I_SYS_TIME +#include +#endif +#ifdef I_SYS_TIMES +#include +#endif +#ifdef I_SYS_WAIT +#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. */ + + 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 + 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 -DPERL_NO_INLINE_FUNCTIONS $ccflags $warn $stdflags $opt _cflags.c -o _cflags$_exe 2>&1`" in + *"unrecognized"*) ;; + *"unknown"*) ;; + *"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*) + echo "cflags.SH: Removing -pedantic and warn because of quadtype='long long'." + 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") + echo "cflags.SH: Removing -pedantic, -std=c89, and -ansi because of ivtype='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$ccflags" in + *-pedantic*) + echo "cflags.SH: Adding -DPERL_PEDANTIC because of -pedantic." + warn="$warn -DPERL_GCC_PEDANTIC" + ;; + esac + ;; +esac + +case "$cc" in +*g++*) + # Extra paranoia in case people have bad canned ccflags: + # bad in the sense that the flags are accepted by g++, + # but then whined about. + for f in -Wdeclaration-after-statement -std=c89 + do + case "$ccflags" in + *"$f"*) + echo "cflags.SH: Removing $ccflags because of g++." + ccflags=`echo $ccflags|sed 's/$f/ /'` ;; + esac + done + ;; +esac + +for f in -Wdeclaration-after-statement +do + case "$cppflags" in + *"$f"*) + echo "cflags.SH: Removing $f from cppflags." + cppflags=`echo $cppflags|sed 's/$f/ /'` ;; + esac +done + +# -Wall includes -Wunused-value and -Wunused-parameter, which may be too much +# with some compilers. +# +# XXX this is related to the unfortunate fact that bare -Wall (without +# amending -Wno-unused-...) is too much for XS code because of all the +# often generated but unused things. +# +case "$ccflags$warn" in +*-Wall*) + is_clang=undef + case "$cc" in + *g++*) + # Without -Wno-unused-variable g++ 4.x compiles are rather unwatchable + # because of all the warnings about Perl___notused, and g++ doesn't do + # __attribute__((unused)) (and even if at some stage it may, people do + # have older gcc installations), and ((void)x) isn't enough to silence + # the noises about XS functions not using their cv parameter, so we need + # the -Wno-unused-parameter too. + # Yes, we lose some valid warnings, but hopefully other compilers + # (like gcc) will still pick up those warnings. + for f in -Wno-unused-variable -Wno-unused-parameter + do + case "$warn" in + *"$f"*) ;; + *) + echo "cflags.SH: Adding $f because of g++." + warn="$warn $f" ;; + esac + done + ;; + *clang*) is_clang=define ;; + *) # clang may not be called clang, it may be called cc. + case "`$cc -v 2>&1`" in + *clang*) is_clang=define ;; + esac ;; + esac + + case "$is_clang" in + define) + for f in -Wno-unused-value + do + case "$warn" in + *"$f"*) ;; + *) + echo "cflags.SH: Adding $f because of clang." + warn="$warn $f" ;; + esac + done + ;; + 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!. -: Protect any dollar signs and backticks that you do not want interpreted -: by putting a backslash in front. You may delete these comments. +# 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!. +# Protect any dollar signs and backticks that you do not want interpreted +# by putting a backslash in front. You may delete these comments. rm -f cflags $spitshell >cflags <>cflags <<'!NO!SUBS!' -case "$0" in -*/*) cd `expr X$0 : 'X\(.*\)/'` ;; -esac -case $CONFIG in +case $PERL_CONFIG_SH in '') - if test ! -f config.sh; then - ln ../config.sh . || \ - ln ../../config.sh . || \ - ln ../../../config.sh . || \ - (echo "Can't find config.sh."; exit 1) - fi 2>/dev/null - . ./config.sh - ;; + if test -f config.sh; then TOP=.; + elif test -f ../config.sh; then TOP=..; + elif test -f ../../config.sh; then TOP=../..; + elif test -f ../../../config.sh; then TOP=../../..; + elif test -f ../../../../config.sh; then TOP=../../../..; + else + echo "Can't find config.sh."; exit 1 + fi + . $TOP/config.sh + ccflags="$myccflags" # Restore possible edits by cflags.SH. + ;; esac -also=': ' -case $# in -1) also='echo 1>&2 " CCCMD = "' +# syntax: cflags [optimize=XXX] [file[.suffix]] ... +# displays the proposed compiler command line for each 'file' +# +# with no file, dispalys it for all *.c files. +# The optimise=XXX arg (if present) is evalled, setting the default +# value of the $optimise variable, which is output on the command line +# (but which may be overridden for specific files below) + +case "X$1" in +Xoptimize=*|X"optimize=*") + eval "$1" + shift + ;; esac case $# in 0) set *.c; echo "The current C flags are:" ;; esac -set `echo "$* " | sed 's/\.[oc] / /g'` +set `echo "$* " | sed -e 's/\.[oc] / /g' -e 's/\.obj / /g' -e "s/\\$obj_ext / /g"` for file do @@ -58,64 +368,40 @@ for file do *) echo $n " $file.c $c" ;; esac - : allow variables like toke_cflags to be evaluated + # allow variables like toke_cflags to be evaluated - eval 'eval ${'"${file}_cflags"'-""}' + if echo $file | grep -v / >/dev/null + then + eval 'eval ${'"${file}_cflags"'-""}' + fi - : or customize here + # or customize here case "$file" in - array) ;; - cmd) ;; - cons) ;; - consarg) ;; - doarg) ;; - doio) ;; - dolist) ;; - dump) ;; - eval) ;; - form) ;; - hash) ;; - malloc) ;; - perl) ;; - perly) ;; - regcomp) ;; - regexec) ;; - stab) ;; - str) ;; - toke) ;; - usersub) ;; - util) ;; - tarray) ;; - tcmd) ;; - tcons) ;; - tconsarg) ;; - tdoarg) ;; - tdoio) ;; - tdolist) ;; - tdump) ;; - teval) ;; - tform) ;; - thash) ;; - tmalloc) ;; - tperl) ;; - tperly) ;; - tregcomp) ;; - tregexec) ;; - tstab) ;; - tstr) ;; - ttoke) ;; - tusersub) ;; - tutil) ;; *) ;; + + # Customization examples follow. + # + # The examples are intentionally unreachable as the '*)' case above 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. + + av) ccflags=`echo $ccflags | sed -e s/-pipe//` ;; + deb) ccflags="$ccflags -fno-jump-tables" ;; + hv) warn=`echo $warn | sed -e s/-Wextra//` ;; + toke) optimize=-O0 ;; esac - echo "$cc -c $ccflags $optimize $large $split" - eval "$also "'"$cc -c $ccflags $optimize $large $split"' + # Can we perhaps use $ansi2knr here + echo "$cc -c -DPERL_CORE $ccflags $stdflags $optimize $warn $extra" - . ./config.sh + . $TOP/config.sh + # end per file behaviour done !NO!SUBS! -chmod +x cflags +chmod 755 cflags $eunicefix cflags