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| author | Masahiro Yamada <masahiroy@kernel.org> | 2020-04-23 23:23:51 +0900 |
|---|---|---|
| committer | Masahiro Yamada <masahiroy@kernel.org> | 2020-05-12 13:28:33 +0900 |
| commit | e33ae3ed331a5cfa24b2abe483f7f4b27bb99c06 (patch) | |
| tree | 5c2541eddc8d3f6c520b51fd63832fc995f1b84d /init | |
| parent | 081b4b54ff6c58be2ffcf09d42e5df8f031eacd0 (diff) | |
| download | lwn-e33ae3ed331a5cfa24b2abe483f7f4b27bb99c06.tar.gz lwn-e33ae3ed331a5cfa24b2abe483f7f4b27bb99c06.zip | |
kbuild: use $(CC_VERSION_TEXT) to evaluate CC_IS_GCC and CC_IS_CLANG
The result of '$(CC) --version | head -n 1' has already been computed
by the top Makefile, and stored in the environment variable,
CC_VERSION_TEXT.
'echo' is cheaper than the two commands $(CC) and 'head' although this
optimization is not noticeable level.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Tested-by: Nathan Chancellor <natechancellor@gmail.com>
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/init/Kconfig b/init/Kconfig index 9278a603d399..2bc63a361033 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -9,7 +9,7 @@ config DEFCONFIG_LIST default "arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG)" config CC_IS_GCC - def_bool $(success,$(CC) --version | head -n 1 | grep -q gcc) + def_bool $(success,echo "$(CC_VERSION_TEXT)" | grep -q gcc) config GCC_VERSION int @@ -21,7 +21,7 @@ config LD_VERSION default $(shell,$(LD) --version | $(srctree)/scripts/ld-version.sh) config CC_IS_CLANG - def_bool $(success,$(CC) --version | head -n 1 | grep -q clang) + def_bool $(success,echo "$(CC_VERSION_TEXT)" | grep -q clang) config CLANG_VERSION int |