Messages in this thread | | | Date | Mon, 14 Nov 2016 11:37:14 -0300 | From | Arnaldo Carvalho de Melo <> | Subject | Re: [PATCH 1/3] tools build: Add CFLAGS_REMOVE_* support |
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Em Mon, Nov 14, 2016 at 11:36:14AM -0300, Arnaldo Carvalho de Melo escreveu: > Em Wed, Nov 02, 2016 at 02:35:47PM +0100, Jiri Olsa escreveu: > > Adding support to remove options from final CFLAGS > > for both object file and build target. It's now > > possible to remove CFLAGS options like: > > > > CFLAGS_REMOVE_krava.o += -Wstrict-prototypes > > That is cool, and I just looked and this comes from the kernel sources, > is there some place where the subset of such features that is supported > in tools/build is being documented? > > Applying it, thanks.
Duh, yeah:
tools/build/Documentation/Build.txt
Nevermind, I'll add a note to the cset log.
- Arnaldo
> - Arnaldo > > > Link: http://lkml.kernel.org/n/tip-0t59dihg30fh035xo69df3m8@git.kernel.org > > Signed-off-by: Jiri Olsa <jolsa@kernel.org> > > --- > > tools/build/Build.include | 4 +++- > > tools/build/Documentation/Build.txt | 6 ++++-- > > 2 files changed, 7 insertions(+), 3 deletions(-) > > > > diff --git a/tools/build/Build.include b/tools/build/Build.include > > index 1dcb95e76f70..c4ae12a5d0a5 100644 > > --- a/tools/build/Build.include > > +++ b/tools/build/Build.include > > @@ -89,7 +89,9 @@ if_changed = $(if $(strip $(any-prereq) $(arg-check)), \ > > # - per target C flags > > # - per object C flags > > # - BUILD_STR macro to allow '-D"$(variable)"' constructs > > -c_flags = -Wp,-MD,$(depfile),-MT,$@ $(CFLAGS) -D"BUILD_STR(s)=\#s" $(CFLAGS_$(basetarget).o) $(CFLAGS_$(obj)) > > +c_flags_1 = -Wp,-MD,$(depfile),-MT,$@ $(CFLAGS) -D"BUILD_STR(s)=\#s" $(CFLAGS_$(basetarget).o) $(CFLAGS_$(obj)) > > +c_flags_2 = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(c_flags_1)) > > +c_flags = $(filter-out $(CFLAGS_REMOVE_$(obj)), $(c_flags_2)) > > cxx_flags = -Wp,-MD,$(depfile),-MT,$@ $(CXXFLAGS) -D"BUILD_STR(s)=\#s" $(CXXFLAGS_$(basetarget).o) $(CXXFLAGS_$(obj)) > > > > ### > > diff --git a/tools/build/Documentation/Build.txt b/tools/build/Documentation/Build.txt > > index a47bffbae159..a22587475dbe 100644 > > --- a/tools/build/Documentation/Build.txt > > +++ b/tools/build/Documentation/Build.txt > > @@ -135,8 +135,10 @@ CFLAGS > > > > It's possible to alter the standard object C flags in the following way: > > > > - CFLAGS_perf.o += '...' - alters CFLAGS for perf.o object > > - CFLAGS_gtk += '...' - alters CFLAGS for gtk build object > > + CFLAGS_perf.o += '...' - adds CFLAGS for perf.o object > > + CFLAGS_gtk += '...' - adds CFLAGS for gtk build object > > + CFLAGS_REMOVE_perf.o += '...' - removes CFLAGS for perf.o object > > + CFLAGS_REMOVE_gtk += '...' - removes CFLAGS for gtk build object > > > > This C flags changes has the scope of the Build makefile they are defined in. > > > > -- > > 2.7.4
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