kbuild: detect missing include guard for exported headers
Adding an include guard to every header file is good practice in case it is included multiple times. Exported headers are compile-tested for the comprehensive sanity checks. Let's include the same header twice. If an include guard is missing, the header will fail to build due to redefinition of something. Signed-off-by:Masahiro Yamada <masahiroy@kernel.org> Reviewed-by:
Sam Ravnborg <sam@ravnborg.org>
parent
c79f46a2
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