On Tue, Apr 19, 2016 at 8:08 AM, H.J. Lu <hongjiu...@intel.com> wrote:
> 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.
Here is the updated patch. Tested on x86-64. OK for trunk?
--
H.J.
From 12c6ddcf67593ed7137764ca74043f1a9c2d8fda Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.to...@gmail.com>
Date: Wed, 30 Mar 2016 05:56:08 -0700
Subject: [PATCH 2/3] Don't build 32-bit libgomp with -march=i486 on x86-64
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.
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..c290080 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
+ # x86_64 compiler passes -march=x86_64 by default when building
+ # 32bit target libraries.
;;
# Note that sparcv7 and sparcv8 is not included here. We need cas.
--
2.5.5
