linux-kernel - Re: [PATCH v4 2/6] perf tools: Promote proper messages for cross-platform unwind

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Date:	Thu, 19 May 2016 19:15:37 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	He Kuang <hekuang@...wei.com>
Cc:	peterz@...radead.org, mingo@...hat.com, acme@...nel.org,
	alexander.shishkin@...ux.intel.com, wangnan0@...wei.com,
	jpoimboe@...hat.com, ak@...ux.intel.com, eranian@...gle.com,
	namhyung@...nel.org, adrian.hunter@...el.com,
	sukadev@...ux.vnet.ibm.com, masami.hiramatsu.pt@...achi.com,
	tumanova@...ux.vnet.ibm.com, kan.liang@...el.com,
	penberg@...nel.org, dsahern@...il.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 2/6] perf tools: Promote proper messages for
 cross-platform unwind

On Thu, May 19, 2016 at 06:46:09PM +0200, Jiri Olsa wrote:
> On Thu, May 19, 2016 at 11:47:38AM +0000, He Kuang wrote:
> 
> SNIP
> 
> >  #endif /* ARCH_PERF_COMMON_H */
> > diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
> > index 1e46277..a86b864 100644
> > --- a/tools/perf/config/Makefile
> > +++ b/tools/perf/config/Makefile
> > @@ -345,6 +345,12 @@ ifeq ($(ARCH),powerpc)
> >  endif
> >  
> >  ifndef NO_LIBUNWIND
> > +  ifeq ($(feature-libunwind-x86), 1)
> > +    LIBUNWIND_LIBS += -lunwind-x86
> > +    $(call detected,CONFIG_LIBUNWIND_X86)
> > +    CFLAGS += -DHAVE_LIBUNWIND_X86_SUPPORT
> > +  endif
> > +
> 
> how does one install that lirary?

had to uninstall x86_64..

[jolsa@...va perf]$ rpm -qa | grep libunw
libunwind-devel-1.1-10.fc22.i686
libunwind-1.1-10.fc22.i686
libunwind-1.1-10.fc22.x86_64


however it's still off:

[jolsa@...va perf]$ make VF=1
  BUILD:   Doing 'make -j4' parallel build

Auto-detecting system features:

SNIP

...                     libunwind: [ OFF ]

SNIP

...                 libunwind-x86: [ OFF ]
...              libunwind-x86_64: [ OFF ]
...                 libunwind-arm: [ OFF ]
...             libunwind-aarch64: [ OFF ]
...   pthread-attr-setaffinity-np: [ on  ]
...            stackprotector-all: [ on  ]
...                       timerfd: [ on  ]


thanks,
jirka