• Masahiro Yamada's avatar
    kbuild: move CFLAGS_{KASAN,UBSAN,KCSAN} exports to relevant Makefiles · bb273211
    Masahiro Yamada authored
    Move CFLAGS_KASAN*, CFLAGS_UBSAN, CFLAGS_KCSAN to Makefile.kasan,
    Makefile.ubsan, Makefile.kcsan, respectively.
    
    This commit also avoids the same -fsanitize=* flags being added to
    CFLAGS_UBSAN multiple times.
    
    Prior to this commit, the ubsan flags were appended by the '+='
    operator, without any initialization. Some build targets such as
    'make bindeb-pkg' recurses to the top Makefile, and ended up with
    adding the same flags to CFLAGS_UBSAN twice.
    
    Clear CFLAGS_UBSAN with ':=' to make it a simply expanded variable.
    This is better than a recursively expanded variable, which evaluates
    $(call cc-option, ...) multiple times before Kbuild starts descending
    to subdirectories.
    Signed-off-by: default avatarMasahiro Yamada <masahiroy@kernel.org>
    Acked-by: default avatarMarco Elver <elver@google.com>
    bb273211
Makefile.kasan 1.52 KB