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Date: Thu, 9 Nov 2017 06:35:29 +0100 From: Sam Ravnborg <sam@...nborg.org> To: Masahiro Yamada <yamada.masahiro@...ionext.com> Cc: linux-kbuild@...r.kernel.org, Rob Herring <robh+dt@...nel.org>, Mark Rutland <mark.rutland@....com>, Pantelis Antoniou <pantelis.antoniou@...sulko.com>, devicetree@...r.kernel.org, Arnd Bergmann <arnd@...db.de>, linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org, Michal Marek <michal.lkml@...kovi.net>, Michal Marek <mmarek@...e.com> Subject: Re: [PATCH 1/2] kbuild: create built-in.o automatically if parent directory wants it Hi Masahiro. Thanks for picking this up. > A key point is, the parent Makefile knows whether built-in.o is needed > or not. If a subdirectory needs to create built-in.o, its parent can > tell the fact when Kbuild descends into it. Good observation! > > diff --git a/Makefile b/Makefile > index 008a4e5..cc0b618 100644 > --- a/Makefile > +++ b/Makefile > @@ -1003,7 +1003,7 @@ $(sort $(vmlinux-deps)): $(vmlinux-dirs) ; > > PHONY += $(vmlinux-dirs) > $(vmlinux-dirs): prepare scripts > - $(Q)$(MAKE) $(build)=$@ > + $(Q)$(MAKE) $(build)=$@ need-builtin=1 The need-bultin may also be required for the shortcuts that allows one to use: make <dir>/ example: make net/ And maybe selftest, documentation shortcuts too? Other than that - looks good. Reviewed-by: Sam Ravnborg <sam@...nborg.org> Sam
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