linux-kernel - Re: [PATCH] perf build: Disable libdw DWARF unwind when built with NO

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Message-ID: <20150508194404.GS7862@kernel.org>
Date:	Fri, 8 May 2015 16:44:04 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	"Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, Jiri Olsa <jolsa@...hat.com>
Subject: Re: [PATCH] perf build: Disable libdw DWARF unwind when built with
 NO_DWARF

Em Wed, Apr 29, 2015 at 04:45:31PM +0530, Naveen N. Rao escreveu:
> We get a linker error if we try to build with NO_DWARF since we build
> util/unwind-libdw.c, but do not include -ldw

Thanks, applied, but adding Jiri to the CC list, lets see if he pokes
some hole on this one...

- Arnaldo
 
> Signed-off-by: Naveen N. Rao <naveen.n.rao@...ux.vnet.ibm.com>
> ---
>  tools/perf/config/Makefile | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
> index 59a98c6..d47c4dc 100644
> --- a/tools/perf/config/Makefile
> +++ b/tools/perf/config/Makefile
> @@ -268,6 +268,10 @@ else
>    endif # libelf support
>  endif # NO_LIBELF
>  
> +ifdef NO_DWARF
> +  NO_LIBDW_DWARF_UNWIND := 1
> +endif
> +
>  ifndef NO_LIBELF
>    CFLAGS += -DHAVE_LIBELF_SUPPORT
>    EXTLIBS += -lelf
> -- 
> 2.3.5
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