• Masahiro Yamada's avatar
    kbuild: build with -Werror=date-time if the compiler supports it · 65bb6d8d
    Masahiro Yamada authored
    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: default avatarJosh Triplett <josh@joshtriplett.org>
    Signed-off-by: default avatarMichal Marek <mmarek@suse.cz>
    Signed-off-by: default avatarMasahiro Yamada <yamada.m@jp.panasonic.com>
    65bb6d8d
Makefile 45.8 KB