-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 TOP=.;
elif test -f ../config.sh; then TOP=..;
. $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 <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 -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 <<!GROK!THIS!
$startsh
+
+# !!!!!!! DO NOT EDIT THIS FILE !!!!!!!
+
+# This file is generated by cflags.SH
+
+# Used to restore possible edits by cflags.SH.
+myccflags="$ccflags"
+# 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.
+# In the following dollars and backticks do not need the extra backslash.
$spitshell >>cflags <<'!NO!SUBS!'
-case $CONFIGDOTSH in
+case $PERL_CONFIG_SH in
'')
if test -f config.sh; then TOP=.;
elif test -f ../config.sh; then TOP=..;
echo "Can't find config.sh."; exit 1
fi
. $TOP/config.sh
+ ccflags="$myccflags" # Restore possible edits by cflags.SH.
;;
esac
-perltype=''
-optdebug='' # ensure -g used if building a -DDEBUGGING libperl
-case $# in
-2) case $1 in
- *perl.*) perltype='';;
- *perld.*) perltype='-DDEBUGGING'; optdebug='-g' ;;
- *perle.*) perltype='-DEMBED';;
- *perlde.*) perltype='-DDEBUGGING -DEMBED'; optdebug='-g' ;;
- *perlm.*) perltype='-DEMBED -DMULTIPLICITY';;
- *perldm.*) perltype='-DDEBUGGING -DEMBED -DMULTIPLICITY'; optdebug='-g' ;;
- esac
- shift ;;
-esac
+# 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)
-also=': '
-case $# in
-1) also='echo 1>&2 " CCCMD = "'
+case "X$1" in
+Xoptimize=*|X"optimize=*")
+ eval "$1"
+ shift
+ ;;
esac
case $# in
*) echo $n " $file.c $c" ;;
esac
- : allow variables like toke_cflags to be evaluated
+ # allow variables like toke_cflags to be evaluated
if echo $file | grep -v / >/dev/null
then
eval 'eval ${'"${file}_cflags"'-""}'
fi
- : or customize here
+ # or customize here
case "$file" in
- DB_File) ;;
- GDBM_File) ;;
- NDBM_File) ;;
- ODBM_File) ;;
- POSIX) ;;
- SDBM_File) ;;
- av) ;;
- byterun) ;;
- deb) ;;
- dl) ;;
- doio) ;;
- doop) ;;
- dump) ;;
- gv) ;;
- hv) ;;
- main) ;;
- malloc) ;;
- mg) ;;
- miniperlmain) ;;
- op) ;;
- perl) ;;
- perlmain) ;;
- perly) ;;
- pp) ;;
- pp_ctl) ;;
- pp_hot) ;;
- pp_sys) ;;
- regcomp) ;;
- regexec) ;;
- run) ;;
- scope) ;;
- sv) ;;
- taint) ;;
- toke) ;;
- usersub) ;;
- util) ;;
*) ;;
- esac
- if test "X$optdebug" != "X"; then
- optimize="$optdebug"
- fi
+ # 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
- : Can we perhaps use $ansi2knr here
- echo "$cc -c -DPERL_CORE $ccflags $optimize $perltype $large $split"
- eval "$also "'"$cc -DPERL_CORE -c $ccflags $optimize $perltype $large $split"'
+ # Can we perhaps use $ansi2knr here
+ echo "$cc -c -DPERL_CORE $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