linux-kernel - Re: [PATCH] kbuild: support make dir/file.i for *.S

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Date:	Tue, 15 Dec 2015 00:14:01 +0800
From:	Wang YanQing <udknight@...il.com>
To:	Brian Gerst <brgerst@...il.com>, mmarek@...e.com
Cc:	linux-kbuild@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	yamada.masahiro@...ionext.com
Subject: Re: [PATCH] kbuild: support make dir/file.i for *.S

On Sat, Dec 12, 2015 at 02:13:03PM -0500, Brian Gerst wrote:
> On Thu, Dec 10, 2015 at 11:33 AM, Wang YanQing <udknight@...il.com> wrote:
> > This feature could reduce a little time to expand all
> > the macros in *.S for reading.
> >
> > Signed-off-by: Wang YanQing <udknight@...il.com>
> > ---
> >  Makefile               | 2 ++
> >  scripts/Makefile.build | 6 ++++++
> >  2 files changed, 8 insertions(+)
> >
> > diff --git a/Makefile b/Makefile
> > index 7558c9c..d7e2060 100644
> > --- a/Makefile
> > +++ b/Makefile
> > @@ -1552,6 +1552,8 @@ endif
> >         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
> >  %.s: %.S prepare scripts FORCE
> >         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
> > +%.i: %.S prepare scripts FORCE
> > +       $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
> >  %.o: %.S prepare scripts FORCE
> >         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
> >  %.symtypes: %.c prepare scripts FORCE
> > diff --git a/scripts/Makefile.build b/scripts/Makefile.build
> > index 2c47f9c..2a51d49 100644
> > --- a/scripts/Makefile.build
> > +++ b/scripts/Makefile.build
> > @@ -287,6 +287,12 @@ cmd_as_s_S       = $(CPP) $(a_flags)   -o $@ $<
> >  $(obj)/%.s: $(src)/%.S FORCE
> >         $(call if_changed_dep,as_s_S)
> >
> > +quiet_cmd_cc_i_S = CPP $(quiet_modtag) $@
> > +cmd_cc_i_S       = $(CPP) $(a_flags)   -o $@ $<
> > +
> > +$(obj)/%.i: $(src)/%.S FORCE
> > +       $(call if_changed_dep,cc_i_S)
> > +
> >  quiet_cmd_as_o_S = AS $(quiet_modtag)  $@
> >  cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
> 
> *.s (lower case) is the suffix used for preprocessed assembly files,
> and there is already a rule for that.  *.i is for preprocessed C
> files.

Agreed, you are right!

Thanks.
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