| From | Masahiro Yamada <> | Subject | [PATCH v2 10/21] kconfig: add 'success' and 'cc-option' macros | Date | Tue, 27 Mar 2018 14:29:24 +0900 |
| |
'cc-option' will be the most frequently used macro. It evaluates to 'y' if the given argument is supported by the compiler, or 'n' otherwise.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> ---
Changes in v2: - Implement 'success' as a macro
init/Kconfig | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/init/Kconfig b/init/Kconfig index 0d6fe20..c456030 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -8,6 +8,12 @@ config DEFCONFIG_LIST default ARCH_DEFCONFIG default "arch/$ARCH/defconfig" +# expanded to y if the command exits with 0, n otherwise +macro success $(shell ($(1) && echo y) || echo n) + +# expanded to y if the given compiler flag is supported, n otherwise +macro cc-option $(success $CC -Werror $(1) -c -x c /dev/null -o /dev/null) + config CONSTRUCTORS bool depends on !UML -- 2.7.4
|