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From:   Kent Overstreet <kent.overstreet@linux.dev>
To:     Masahiro Yamada <masahiroy@kernel.org>,
        Nick Desaulniers <ndesaulniers@google.com>,
        Nathan Chancellor <nathan@kernel.org>
Cc:     linux-kbuild@vger.kernel.org
Subject: Specifying CFLAGS for a directory on the command line
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Hello kbuild maintainers & list,

Years ago I used to be able to specify additional CFLAGS for a specific
subdirectory on the command line, which I used for enabling gcov
profiling without editing the subdirectory makefile, like so:

  make GCOV_PROFILE_fs_bcachefs=y

But this stopped working ages ago, I believe in the 3.x era. Does anyone
know if there's a more modern way to do this?

Cheers,
Kent