[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Date: Wed, 8 Aug 2012 09:27:05 +0300
From: Dragos Tatulea <dragos.tatulea@...el.com>
To: hpa@...ux.intel.com
Cc: linux-kernel@...r.kernel.org,
Dragos Tatulea <dragos.tatulea@...el.com>
Subject: [PATCH] x86: set fpmath to 387 to avoid gcc warnings
If gcc has a different default fpmath set (ex: sse),
many unuseful warnings will be spewed.
This can affect out of tree modules that compile with
-Werror (ex: systemtap stp scripts).
Be paranoid and add -msoft-float as well to try to
get an error if FP instructions are generated at all.
Change-Id: If9271d7aea7371f394ede0bc5e3ed1383cdb0e1a
Signed-off-by: Dragos Tatulea <dragos.tatulea@...el.com>
---
arch/x86/Makefile | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index b1c611e..b771d0b 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -130,6 +130,7 @@ KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
# prevent gcc from generating any FP code by mistake
KBUILD_CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,)
KBUILD_CFLAGS += $(call cc-option,-mno-avx,)
+KBUILD_CFLAGS += $(call cc-option,-mfpmath=387 -msoft-float,)
KBUILD_CFLAGS += $(mflags-y)
KBUILD_AFLAGS += $(mflags-y)
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists