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author | Masahiro Yamada <yamada.m@jp.panasonic.com> | 2014-04-18 14:09:51 +0400 |
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committer | Tom Rini <trini@ti.com> | 2014-05-12 23:19:46 +0400 |
commit | 65bb6d8deebf608ac2bd6c3eb60ad81cf5d30f60 (patch) | |
tree | de2ea878fe827f3a5e25d83ba0c76684d4fd9f2e /Makefile | |
parent | 9995d8c8dca4dced5be7c86f75cf53d3166bdead (diff) | |
download | u-boot-65bb6d8deebf608ac2bd6c3eb60ad81cf5d30f60.tar.xz |
kbuild: build with -Werror=date-time if the compiler supports it
Using __DATE__, __TIME__ would make the build non-deterministic.
If the code needs to refer to build date/time, use U_BOOT_DATE and
U_BOOT_TIME in include/generated/timestamp_autogenerated.h instead.
This commit has been imported from Linux Kernel,
which should be applied to U-Boot too:
commit fe7c36c7bde12190341722af69358e42171162f3
Author: Josh Triplett <josh@joshtriplett.org>
Date: Mon Dec 23 13:56:06 2013 -0800
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 <josh@joshtriplett.org>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Diffstat (limited to 'Makefile')
-rw-r--r-- | Makefile | 3 |
1 files changed, 3 insertions, 0 deletions
@@ -578,6 +578,9 @@ KBUILD_AFLAGS += -Wa,-gstabs,-S endif endif +# Prohibit date/time macros, which would make the build non-deterministic +KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) + ifneq ($(CONFIG_SYS_TEXT_BASE),) KBUILD_CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE) endif |