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[PATCH] Don't build 32-bit libgomp with -march=i486 on x86-64
- From: "H.J. Lu" <hongjiu dot lu at intel dot com>
- To: gcc-patches at gcc dot gnu dot org
- Date: Tue, 19 Apr 2016 08:08:10 -0700
- Subject: [PATCH] Don't build 32-bit libgomp with -march=i486 on x86-64
- Authentication-results: sourceware.org; auth=none
- Reply-to: "H.J. Lu" <hjl dot tools at gmail dot com>
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