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>
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@ -8,6 +8,14 @@ config DEFCONFIG_LIST
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default ARCH_DEFCONFIG
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default "arch/$(ARCH)/defconfig"
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config CC_IS_GCC
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def_bool $(success,$(CC) --version | head -n 1 | grep -q gcc)
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config GCC_VERSION
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int
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default $(shell,$(srctree)/scripts/gcc-version.sh -p $(CC) | sed 's/^0*//') if CC_IS_GCC
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default 0
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config CONSTRUCTORS
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bool
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depends on !UML
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