linux-kernel - Linux 4.3-rc1 build error with older elfutils "util/symbol-elf.c:41:5: error: no previous prototype for ‘elf

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Date:	Wed, 16 Sep 2015 15:10:44 -0700
From:	Vinson Lee <vlee@...pensource.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Jiri Olsa <jolsa@...nel.org>,
	"Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Wang Nan <wangnan0@...wei.com>,
	Victor Kamensky <victor.kamensky@...aro.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	linux-perf-users@...r.kernel.org
Subject: Linux 4.3-rc1 build error with older elfutils "util/symbol-elf.c:41:5: error: no previous prototype for ‘elf_getphdrnum’"

Hi.

With Linux 4.3-rc1 I get a perf build error using toolchains with
older elfutils.

The following build error occurs on both CentOS 5.11 (elfutils 0.137)
and Ubuntu 10.04.4 (elfutils 0.143).

  CC       util/symbol-elf.o
cc1: warnings being treated as errors
util/symbol-elf.c:41: error: no previous prototype for ‘elf_getphdrnum’

Cheers,
Vinson
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