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[PATCH] When disabling SSE, make sure -fpmath is not set to use SSE either
- From: Khem Raj <raj dot khem at gmail dot com>
- To: libc-alpha at sourceware dot org
- Cc: Khem Raj <raj dot khem at gmail dot com>
- Date: Tue, 5 Jan 2016 18:29:52 -0800
- Subject: [PATCH] When disabling SSE, make sure -fpmath is not set to use SSE either
- Authentication-results: sourceware.org; auth=none
This fixes errors when we inject sse options through CFLAGS and now
that we have -Werror turned on by default this warning turns to become
error on x86
gcc -m32 -march=core2 -mtune=core2 -msse3 -mfpmath=sse -x c /dev/null -S
-mno-sse -mno-mmx
generates warning
/dev/null:1:0: warning: SSE instruction set disabled, using 387
arithmetics
where as
gcc -m32 -march=core2 -mtune=core2 -msse3 -mfpmath=sse -x c /dev/null -S
-mno-sse -mno-mmx -mfpmath=387
Generates no warnings
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
ChangeLog | 5 +++++
sysdeps/i386/Makefile | 2 +-
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/ChangeLog b/ChangeLog
index 2ad1b5a..bbb7199 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2016-01-05 Khem Raj <raj.khem@gmail.com>
+
+ * sysdeps/i386/Makefile [$(subdir) == elf] (CFLAGS-.os):
+ Add -mfpmath=387.
+
2016-01-05 Joseph Myers <joseph@codesourcery.com>
* manual/texinfo.tex: Update to version 2016-01-04.21 with
diff --git a/sysdeps/i386/Makefile b/sysdeps/i386/Makefile
index 168512f..70153b3 100644
--- a/sysdeps/i386/Makefile
+++ b/sysdeps/i386/Makefile
@@ -89,7 +89,7 @@ ifeq ($(subdir),elf)
# the first 3 mm/xmm/ymm/zmm registers are used to pass vector parameters
# which must be preserved.
CFLAGS-.os += $(if $(filter $(@F),$(patsubst %,%.os,$(all-rtld-routines))),\
- -mno-sse -mno-mmx)
+ -mno-sse -mno-mmx -mfpmath=387)
tests-special += $(objpfx)tst-ld-sse-use.out
$(objpfx)tst-ld-sse-use.out: ../sysdeps/i386/tst-ld-sse-use.sh $(objpfx)ld.so
--
2.6.4