[PATCH] Don't build 32-bit libitm with -march=i486 on x86-64

[H.J. Lu]

Gcc uses the same -march= for both -m32 and -m64 on x86-64 unless
--with-arch-32= is used.  There is no need for -march=i486 to compile
32-bit libitm on x86-64.

Tested on x86-64.  OK for trunk?


H.J.
---
        PR target/70454
        * configure.tgt (XCFLAGS): Don't add -march=i486 to compile
        32-bit target library on x86-64.
---
 libitm/configure.tgt | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/libitm/configure.tgt b/libitm/configure.tgt
index e84382f..c925f77 100644
--- a/libitm/configure.tgt
+++ b/libitm/configure.tgt
@@ -100,12 +100,8 @@ case "${target_cpu}" in
        ;;
 
   x86_64)
-       case " ${CC} ${CFLAGS} " in
-         *" -m32 "*)
-           XCFLAGS="${XCFLAGS} -march=i486 -mtune=generic"
-           XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
-           ;;
-       esac
+       # Since 64-bit arch > i486, we can use the same -march= to build
+       # both 32-bit and 64-bit target libraries.
        XCFLAGS="${XCFLAGS} -mrtm"
        ARCH=x86
        ;;
-- 
2.5.5