Messages in this thread | | | From | Masahiro Yamada <> | Date | Sun, 23 Apr 2017 15:53:44 +0900 | Subject | Re: [PATCH] kbuild: avoid conflict between -ffunction-sections and -pg on gcc-4.7 |
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2017-04-14 15:17 GMT+09:00 Masahiro Yamada <yamada.masahiro@socionext.com>: > Arnd Bergmann reported: > "When ftrace is enabled and we build with gcc-4.7 or older, we > get a warning for each file on architectures that select > CONFIG_LD_DEAD_CODE_DATA_ELIMINATION: > > warning: -ffunction-sections disabled; it makes profiling impossible [enabled by default] > " > > Since commit c3f0d0bc5b01 ("kbuild, LLVMLinux: Add -Werror to > cc-option to support clang"), warnings are treated as errors in > cc-option checks. CC_FLAGS_FTRACE is blindly added to KBUILD_CFLAGS, > so $(call cc-option,-ffunction-sections,) should be moved below it > in order to detect the conflict between the two options. > > Reported-by: Arnd Bergmann <arnd@arndb.de> > Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Applied to linux-kbuild/kbuild.
-- Best Regards Masahiro Yamada
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