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.tatu...@intel.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 majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
