***
*** Therefore, I strongly suggest upgrading your gcc. (Why don't you use
*** the vendor cc is also a good question. It comes with the operating
-*** system and produces good code.)
+*** system, produces good code, and is very ANSI C fastidious.)
Cannot continue, aborting.
EOF
fi
+ # -ansi is fine for gcc in Tru64 (-ansi is not universally so).
+ _ccflags_strict_ansi="-ansi"
;;
-*) # compile something small: taint.c is fine for this.
+*) # compile something.
+ cat >try.c <<EOF
+int main() { return 0; }
+EOF
ccversion=`cc -V | awk '/(Compaq|DEC) C/ {print $3}' | grep '^V'`
# the main point is the '-v' flag of 'cc'.
- case "`cc -v -I. -c taint.c -o taint$$.o 2>&1`" in
+ case "`cc -v -c try.c 2>&1`" in
*/gemc_cc*) # we have the new DEC GEM CC
_DEC_cc_style=new
;;
_DEC_cc_style=old
;;
esac
- # cleanup
- rm -f taint$$.o
+ # We need to figure out whether -c99 is a valid flag to use.
+ # If it is, we can use it for being nauseatingly C99 ANSI --
+ # but even then the lddlflags needs to stay -std1.
+ # If it is not, we must use -std1 for both flags.
+ #
+ case "`cc -c99 try.c 2>&1`" in
+ *"-c99: Unknown flag"*)
+ _ccflags_strict_ansi="-std1"
+ ;;
+ *) # However, use the -c99 only if compiling for
+ # -DPERL_MEM_LOG, where the C99 feature __func__
+ # is useful to have. Otherwise use the good old
+ # -std1 so that we stay C89 strict, which the goal
+ # of the Perl C code base (no //, no code between
+ # declarations, etc). Moreover, the Tru64 cc is
+ # not fully C99, and most probably never will be.
+ #
+ # The -DPERL_MEM_LOG can be either in ccflags
+ # (if using an old config.sh) or in the command line
+ # (which has been stowed away in UU/cmdline.opt).
+ #
+ case "$ccflags `cat UU/cmdline.opt`" in
+ *-DPERL_MEM_LOG*) _ccflags_strict_ansi="-c99" ;;
+ *) _ccflags_strict_ansi="-std1" ;;
+ esac
+ ;;
+ esac
+ _lddlflags_strict_ansi="-std1"
+ # -no_ansi_alias because Perl code is not that strict
+ # (also gcc uses by default -fno-strict-aliasing).
+ _ccflags_strict_ansi="$_ccflags_strict_ansi -no_ansi_alias"
+ # Cleanup.
+ rm -f try.c try.o
;;
esac
-# be nauseatingly ANSI
-case "$isgcc" in
-gcc) ccflags="$ccflags -ansi"
- ;;
-*) ccflags="$ccflags -std"
- ;;
+# Be nauseatingly ANSI
+ccflags="$ccflags $_ccflags_strict_ansi"
+
+# g++ needs a lot of definitions to see the same set of
+# prototypes from <unistd.h> et alia as cxx/cc see.
+# Note that we cannot define _XOPEN_SOURCE_EXTENDED or
+# its moral equivalent, _XOPEN_SOURCE=500 (which would
+# define a lot of the required prototypes for us), because
+# the gcc-processed version of <sys/wait.h> contains fatally
+# conflicting prototypes for wait3().
+case "$cc" in
+*g++*) ccflags="$ccflags -D_XOPEN_SOURCE -D_OSF_SOURCE -D_AES_SOURCE -D_BSD -D_POSIX_C_SOURCE=199309L -D_POSIX_PII_SOCKET" ;;
esac
# for gcc the Configure knows about the -fpic:
;;
esac
+case "$isgcc" in
+gcc) ;;
+*) case "$optimize" in
+ *-O*) # With both -O and -g, the -g must be -g3.
+ optimize="`echo $optimize | sed 's/-g[1-4]*/-g3/'`"
+ ;;
+ esac
+ ;;
+esac
+
## Optimization limits
case "$isgcc" in
gcc) # gcc 3.2.1 wants a lot of memory for -O3'ing toke.c
cat >try.c <<EOF
+#include <stdio.h>
#include <sys/resource.h>
int main ()
;;
esac
+# The patch 23787
+# http://public.activestate.com/cgi-bin/perlbrowse?patch=23787
+# broke things for gcc (at least gcc 3.3) so that many of the pack()
+# checksum tests for formats L, j, J, especially when combined
+# with the < and > specifiers, started to fail if compiled with plain -O3.
+case "$isgcc" in
+gcc)
+pp_pack_cflags='optimize="-O3 -fno-cse-skip-blocks"'
+;;
+esac
+
# we want dynamic fp rounding mode, and we want ieee exception semantics
case "$isgcc" in
gcc) ;;
esac
# -msym: If using a sufficiently recent /sbin/loader,
# keep the module symbols with the modules.
- lddlflags="$lddlflags -msym -std"
+ lddlflags="$lddlflags -msym $_lddlflags_strict_ansi"
fi
;;
esac
extern int foo;
EOF
$cc -c pthread.c 2> pthread.err
- if grep -q "unrecognized compiler" pthread.err; then
+ if egrep -q "unrecognized compiler|syntax error" pthread.err; then
cat >&4 <<EOF
***
*** I'm sorry but your C compiler ($cc) cannot be used to
exit 1
;;
*)
- # Test whether libc's been fixed yet.
+ # Test whether libc's been fixed yet for long doubles.
cat >try.c <<\TRY
#include <stdio.h>
int main(int argc, char **argv)
# Don't bother trying to work with Configure's idea of
# cc and the various flags. This might not work as-is
# with gcc -- but we're testing libc, not the compiler.
- if cc -o try -std try.c && ./try
+ if cc -o try $_ccflags_strict_ansi try.c && ./try
then
: ok
else
# * Set -Olimit to 3200 because perl_yylex.c got too big
# for the optimizer.
#
+
projects / p5sagit/p5-mst-13.2.git / blobdiff