Don't build 32-bit libatomic 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 libatomic on x86-64.

	PR target/70454
	* configure.tgt (XCFLAGS): Don't add -march=i486 to compile
	32-bit x86 target library on x86-64.

From-SVN: r235287

diff --git a/libatomic/ChangeLog b/libatomic/ChangeLog
index f476a6fa8b43ce2710ec8b49e64991d405b416d5..70a7f7ceca1fcb4545a945b56b65baeb82dadda3 100644 (file)
--- a/libatomic/ChangeLog
+++ b/libatomic/ChangeLog
@@ -1,3 +1,9 @@
+2016-04-20  H.J. Lu  <hongjiu.lu@intel.com>
+
+       PR target/70454
+       * configure.tgt (XCFLAGS): Don't add -march=i486 to compile
+       32-bit x86 target library on x86-64.
+
 2016-01-06  Szabolcs Nagy  <szabolcs.nagy@arm.com>
 
        PR other/67627

diff --git a/libatomic/configure.tgt b/libatomic/configure.tgt
index c5470d7ef8c36dc6b77a16fa72c17d286ff4318d..49233a4f45ae5314d514266b9600539f404af61d 100644 (file)
--- a/libatomic/configure.tgt
+++ b/libatomic/configure.tgt
@@ -81,14 +81,8 @@ case "${target_cpu}" in
        try_ifunc=yes
        ;;
   x86_64)
-       case " ${CC} ${CFLAGS} " in
-         *" -m32 "*)
-           XCFLAGS="${XCFLAGS} -march=i486 -mtune=generic"
-           XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
-           ;;
-         *)
-           ;;
-       esac
+       # x86_64 compiler passes -march=x86_64 by default when building
+       # 32bit target libraries.
        ARCH=x86
        # ??? Detect when -mcx16 is already enabled.
        try_ifunc=yes