git: <bsd.subdir.mk>: Fix SUBDIR ordering for non-parallel mode

[Aaron LI]

commit f1d43b88a9c653f4aecfdd16e3d2fabc4b7d365d
Author: Aaron LI <aly at aaronly.me>
Date:   Thu Apr 2 22:39:52 2026 +0800

    <bsd.subdir.mk>: Fix SUBDIR ordering for non-parallel mode
    
    As documented in make(1) man page as well as my tests, the '.ORDER'
    directive only applies to the parallel mode (even -j1), so the
    ${SUBDIR_ORDERED} is actually ignored in the non-parallel mode.  As a
    result, the build ordering for the subdirectories is their order in
    ${SUBDIR}, which may be different from ${SUBDIR_ORDERED}, and this can
    lead to build failures.  For example, gnu/lib/gcc120/libstd++fs failed
    to build because it was built before the dependent libstdcxx/headers.
    
    Discussed-with: swildner

Summary of changes:
 share/mk/bsd.subdir.mk | 25 ++++++++++++++++++++-----
 1 file changed, 20 insertions(+), 5 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/f1d43b88a9c653f4aecfdd16e3d2fabc4b7d365d


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