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    Subject[PATCH 22/30] kconfig: add CC_IS_GCC and GCC_VERSION
    Date
    This will be useful to specify the required compiler version,
    like this:

    config FOO
    bool "Use Foo"
    depends on GCC_VERSION >= 408000
    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>
    ---

    Changes in v3: None
    Changes in v2: None

    init/Kconfig | 8 ++++++++
    1 file changed, 8 insertions(+)

    diff --git a/init/Kconfig b/init/Kconfig
    index 4b0b636..145a534 100644
    --- a/init/Kconfig
    +++ b/init/Kconfig
    @@ -8,6 +8,14 @@ config DEFCONFIG_LIST
    default ARCH_DEFCONFIG
    default "arch/$(ARCH)/defconfig"

    +config CC_IS_GCC
    + def_bool $(success $(CC) --version | 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
    --
    2.7.4
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