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2002-10-06 Yoshinori K. Okuji <okuji@enbug.org>

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* configure.in (falign_loop_flag): New variable. Set to if GCC
	supports `-falign-*'. If true, use `-falign-jumps',
	`-falign-loops' and `-falign-functions' instead of
	`-malign-jumps', `-malign-loops' and `-malign-functions',
	because `-malign-*' are obsolete in GCC 3.x. Reported by Jeremy
	Katz.
This commit is contained in:
okuji committed 2002-10-05 23:20:15 +00:00
1 parent cba84c4d9c
commit f891c6f7e4
7 files changed
+89 -10
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configure
Vendored
+60 -3
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@@ -2992,7 +2992,7 @@ if test "${undef_flag+set}" = set; then
echo $ECHO_N "(cached) $ECHO_C" >&6
else
saved_CPPFLAGS=$CPPFLAGS
saved_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="-Wundef"
cat >conftest.$ac_ext <<_ACEOF
#line $LINENO "configure"
@@ -3031,14 +3031,71 @@ cat conftest.$ac_ext >&5
undef_flag=no
fi
rm -f conftest.$ac_objext conftest.$ac_ext
CPPFLAGS=$saved_CPPFLAGS
CPPFLAGS="$saved_CPPFLAGS"
fi
echo "$as_me:$LINENO: result: $undef_flag" >&5
echo "${ECHO_T}$undef_flag" >&6
# The options `-falign-*' are supported by gcc 3.0 or later.
# Probably it is sufficient to only check for -falign-loops.
echo "$as_me:$LINENO: checking whether -falign-loops works" >&5
echo $ECHO_N "checking whether -falign-loops works... $ECHO_C" >&6
if test "${falign_loop_flag+set}" = set; then
echo $ECHO_N "(cached) $ECHO_C" >&6
else
saved_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="-falign-loops=1"
cat >conftest.$ac_ext <<_ACEOF
#line $LINENO "configure"
#include "confdefs.h"
#ifdef F77_DUMMY_MAIN
# ifdef __cplusplus
extern "C"
# endif
int F77_DUMMY_MAIN() { return 1; }
#endif
int
main ()
{
;
return 0;
}
_ACEOF
rm -f conftest.$ac_objext
if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
(eval $ac_compile) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -s conftest.$ac_objext'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; }; then
falign_loop_flag=yes
else
echo "$as_me: failed program was:" >&5
cat conftest.$ac_ext >&5
falign_loop_flag=no
fi
rm -f conftest.$ac_objext conftest.$ac_ext
CPPFLAGS="$saved_CPPFLAGS"
fi
echo "$as_me:$LINENO: result: $falign_loop_flag" >&5
echo "${ECHO_T}$falign_loop_flag" >&6
# Force no alignment to save space.
CPPFLAGS="$CPPFLAGS -malign-jumps=1 -malign-loops=1 -malign-functions=1"
if test "x$falign_loop_flag" = xyes; then
CPPFLAGS="$CPPFLAGS -falign-jumps=1 -falign-loops=1 -falign-functions=1"
else
CPPFLAGS="$CPPFLAGS -malign-jumps=1 -malign-loops=1 -malign-functions=1"
fi
if test "x$undef_flag" = xyes; then
CPPFLAGS="$CPPFLAGS -Wundef"