kconfig: add CC_IS_GCC and GCC_VERSION
This will be useful to specify the required compiler version,
like this:
config FOO
bool "Use Foo"
depends on GCC_VERSION >= 40800
help
This feature requires GCC 4.8 or newer.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
diff --git a/init/Kconfig b/init/Kconfig
index 22ca30f..66c8fd1 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -8,6 +8,14 @@
default ARCH_DEFCONFIG
default "arch/$(ARCH)/defconfig"
+config CC_IS_GCC
+ def_bool $(success,$(CC) --version | head -n 1 | grep -q gcc)
+
+config GCC_VERSION
+ int
+ default $(shell,$(srctree)/scripts/gcc-version.sh -p $(CC) | sed 's/^0*//') if CC_IS_GCC
+ default 0
+
config CONSTRUCTORS
bool
depends on !UML