[PATCH] Don't build 32-bit libgomp 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 libgomp 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.
---
 libgomp/configure.tgt | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/libgomp/configure.tgt b/libgomp/configure.tgt
index 77e73f0..a36acc5 100644
--- a/libgomp/configure.tgt
+++ b/libgomp/configure.tgt
@@ -79,16 +79,10 @@ if test x$enable_linux_futex = xyes; then
        esac
        ;;
 
-    # Similar jiggery-pokery for x86_64 multilibs, except here we
-    # can't rely on the --with-arch configure option, since that
-    # applies to the 64-bit side.
     x86_64-*-linux*)
        config_path="linux/x86 linux posix"
-       case " ${CC} ${CFLAGS} " in
-         *" -m32 "*)
-           XCFLAGS="${XCFLAGS} -march=i486 -mtune=generic"
-           ;;
-       esac
+       # Since 64-bit arch > i486, we can use the same -march= to build
+       # both 32-bit and 64-bit target libraries.
        ;;
 
     # Note that sparcv7 and sparcv8 is not included here.  We need cas.
-- 
2.5.5