linux-kernel - Re: [patch] perf: Fix build failure on OpenSuse userspace

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Date:	Fri, 4 May 2012 18:41:18 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Namhyung Kim <namhyung@...il.com>
Cc:	Lucas De Marchi <lucas.de.marchi@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Greg KH <gregkh@...uxfoundation.org>,
	Arnaud Lacombe <lacombar@...il.com>,
	David Miller <davem@...emloft.net>, namhyung.kim@....com,
	a.p.zijlstra@...llo.nl, paulus@...ba.org, mingo@...hat.com,
	acme@...stprotocols.net, linux-kernel@...r.kernel.org
Subject: Re: [patch] perf: Fix build failure on OpenSuse userspace

On Sat, May 05, 2012 at 12:38:48AM +0900, Namhyung Kim wrote:
> Hi,
> 
> On Fri, 4 May 2012 17:26:13 +0200, Jiri Olsa wrote:
> > On Fri, May 04, 2012 at 12:10:55PM -0300, Lucas De Marchi wrote:
> >> Nah. What you need is -Wno-sign-compare.
> >> 
> >> But you are better off overriding the CFLAGS for these generated
> >> files. Just put -Wno-error as the last one (untested, but should work)
> >
> > yep, I think it's good idea..  and plus '-w' to suppres warnings not to
> > polute the build log
> >
> > jirka
> 
> Works well for me. But I guess -Wno-error turns into a nop if we use
> '-w', right?

argghh.. right ;) misread the man page.. I tested -w is enough

thanks,
jirka

> 
> 
> Thank,
> Namhyung
> 
> 
> >
> >
> > ---
> > diff --git a/tools/perf/Makefile b/tools/perf/Makefile
> > index 7055a00..9c734a2 100644
> > --- a/tools/perf/Makefile
> > +++ b/tools/perf/Makefile
> > @@ -729,10 +729,10 @@ $(OUTPUT)perf.o perf.spec \
> >  # over the general rule for .o
> >  
> >  $(OUTPUT)util/%-flex.o: $(OUTPUT)util/%-flex.c $(OUTPUT)PERF-CFLAGS
> > -	$(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) -Iutil/ -Wno-redundant-decls -Wno-switch-default -Wno-unused-function $<
> > +	$(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) -Iutil/ -Wno-error -w $<
> >  
> >  $(OUTPUT)util/%-bison.o: $(OUTPUT)util/%-bison.c $(OUTPUT)PERF-CFLAGS
> > -	$(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) -DYYENABLE_NLS=0 -DYYLTYPE_IS_TRIVIAL=0 -Iutil/ -Wno-redundant-decls -Wno-switch-default -Wno-unused-function $<
> > +	$(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) -DYYENABLE_NLS=0 -DYYLTYPE_IS_TRIVIAL=0 -Iutil/ -Wno-error -w $<
> >  
> >  $(OUTPUT)%.o: %.c $(OUTPUT)PERF-CFLAGS
> >  	$(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) $<
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