From: Josh Triplett Date: Mon, 23 Dec 2013 21:56:06 +0000 (-0800) Subject: Makefile: Build with -Werror=date-time if the compiler supports it X-Git-Tag: v3.14-rc1~40^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=fe7c36c7bde12190341722af69358e42171162f3;p=profile%2Fcommon%2Fkernel-common.git Makefile: Build with -Werror=date-time if the compiler supports it GCC 4.9 and newer have a new warning -Wdate-time, which warns on any use of __DATE__, __TIME__, or __TIMESTAMP__, which would make the build non-deterministic. Now that the kernel does not use any of those macros, turn on -Werror=date-time if available, to keep it that way. The kernel already (optionally) records this information at build time in a single place; other kernel code should not duplicate that. Signed-off-by: Josh Triplett Signed-off-by: Michal Marek --- diff --git a/Makefile b/Makefile index 455fd48..731e3ce 100644 --- a/Makefile +++ b/Makefile @@ -682,6 +682,9 @@ KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int) # require functions to have arguments in prototypes, not empty 'int foo()' KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes) +# Prohibit date/time macros, which would make the build non-deterministic +KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) + # use the deterministic mode of AR if available KBUILD_ARFLAGS := $(call ar-option,D)