Re: linux-next: build failure after merge of the tip tree

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On Fri, Apr 15, 2016 at 06:28:31PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Fri, Apr 15, 2016 at 06:15:42PM -0300, Arnaldo Carvalho de Melo escreveu:
> > Em Thu, Apr 14, 2016 at 12:14:18PM +1000, Stephen Rothwell escreveu:
> > > Hi all,
> > > 
> > > After merging the tip tree, today's linux-next build (powerpc64le perf)
> > > failed like this:
> > > 
> > > make[3]: *** No rule to make target '/home/sfr/next/perf/arch/x86/include/generated/asm/syscalls_64.c', needed by '/home/sfr/next/perf/util/syscalltbl.o'.  Stop.
> > > 
> > > (I build in /home/sfr/next/next with objects in /home/sfr/next/perf.)
> > > 
> > > Presumably caused by commit
> > > 
> > >   1b700c997500 ("perf tools: Build syscall table .c header from kernel's syscall_64.tbl")
> > > 
> > > I have reverted that commit for today (which fixes my build problem but
> > > may not be overall correct).
> > 
> > Right, I'm trying to figure out how to bet fix that, one way would be to
> > do:
> 
> Jiri, I think this is enough, i.e. I think we make sure, just like the
> kernel, that the archheaders target in tools/perf/arch/*/Makefile is
> called before doing all the other build, no?
> 
> I.e. when we get to build syscalltbl.o the syscalls_64.c file will be
> built already, limited testing seems to agree with this :-)
> 
> - Arnaldo
>  
> > diff --git a/tools/perf/util/Build b/tools/perf/util/Build
> > index 85a9ab62e23f..7fc4ac304ed6 100644
> > --- a/tools/perf/util/Build
> > +++ b/tools/perf/util/Build
> > @@ -150,7 +150,7 @@ CFLAGS_libstring.o     += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ET
> >  CFLAGS_hweight.o       += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
> >  CFLAGS_parse-events.o  += -Wno-redundant-decls
> >  
> > -$(OUTPUT)util/syscalltbl.o: util/syscalltbl.c arch/x86/entry/syscalls/syscall_64.tbl $(OUTPUT)arch/x86/include/generated/asm/syscalls_64.c FORCE
> > +$(OUTPUT)util/syscalltbl.o: util/syscalltbl.c FORCE

yep, having arch specific target in generic Build file is wrong
I'll have ppc64le available later today, I'll check on that

jirka
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