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Date: Thu, 17 Jan 2019 15:55:31 +0100
From: Christoph Hellwig <hch@lst.de>
Subject: SUBDIRS= replacement
Message-ID: <20190117145531.GA21429@lst.de>
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To: Masahiro Yamada <yamada.masahiro@socionext.com>, Michal Marek <michal.lkml@markovi.net>
Cc: linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org

Hi Masahiro, hi Michal,

I just got this beatiful warning:

hch@carbon:~/work/xfs$ make -j4 SUBDIRS=fs/xfs
Makefile:189: ================= WARNING ================
Makefile:190: 'SUBDIRS' will be removed after Linux 5.3
Makefile:191: Please use 'M=' or 'KBUILD_EXTMOD' instead
Makefile:192: ==========================================

Both the replacement seem to be geared towards building externals
modules.  But what is the replacement for just building a directory
of the normal kernel tree?

E.g. what hit this is that I rebased an XFS series, and wanted to
compile test just the xfs code for each step using

make -j4 SUBDIRS=fs/xfs