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| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2019-03-01 16:10:21 +0900 |
|---|---|---|
| committer | Masahiro Yamada <yamada.masahiro@socionext.com> | 2019-03-04 22:34:59 +0900 |
| commit | d3a918c659ed0998ac668de3973e81bab81dde74 (patch) | |
| tree | 31f247bad04c26b04ed824cec7d3ada47d2bba1e /scripts/Kbuild.include | |
| parent | 00250b52190bc30fb83ea464d9e921b53c07aaa1 (diff) | |
| download | lwn-d3a918c659ed0998ac668de3973e81bab81dde74.tar.gz lwn-d3a918c659ed0998ac668de3973e81bab81dde74.zip | |
kbuild: remove cc-version macro
There is no more direct user of this macro; it is only used by
cc-ifversion.
Calling this macro is not efficient since it invokes the compiler to
get the compiler version. CONFIG_GCC_VERSION is already calculated in
the Kconfig stage, so Makefile can reuse it.
Here is a note about the slight difference between cc-version and
CONFIG_GCC_VERSION:
When using Clang, cc-version is evaluated to '0402' because Clang
defines __GNUC__ and __GNUC__MINOR__, and looks like GCC 4.2 in the
version point of view. On the other hand, CONFIG_GCC_VERSION=0
when $(CC) is clang.
There are currently two users of cc-ifversion:
arch/mips/loongson64/Platform
arch/powerpc/Makefile
They are not affected by this change.
The format of cc-version is <major><minor>, while CONFIG_GCC_VERSION
<major><minor><patch>. I adjusted cc-ifversion for the difference of
the number of digits.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to 'scripts/Kbuild.include')
| -rw-r--r-- | scripts/Kbuild.include | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include index c1e15a4aee36..7484b9d8272f 100644 --- a/scripts/Kbuild.include +++ b/scripts/Kbuild.include @@ -134,12 +134,9 @@ cc-option-yn = $(call try-run,\ cc-disable-warning = $(call try-run,\ $(CC) -Werror $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1))) -# cc-version -cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh $(CC)) - # cc-ifversion # Usage: EXTRA_CFLAGS += $(call cc-ifversion, -lt, 0402, -O1) -cc-ifversion = $(shell [ $(cc-version) $(1) $(2) ] && echo $(3) || echo $(4)) +cc-ifversion = $(shell [ $(CONFIG_GCC_VERSION)0 $(1) $(2)000 ] && echo $(3) || echo $(4)) # cc-ldoption # Usage: ldflags += $(call cc-ldoption, -Wl$(comma)--hash-style=both) |