From mboxrd@z Thu Jan  1 00:00:00 1970
From: will.deacon@arm.com (Will Deacon)
Date: Fri, 26 Sep 2014 17:25:31 +0100
Subject: perf tool failing to build for ARM
Message-ID: <20140926162530.GB11361@arm.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

Hi Jean,

I'm getting the following error trying to build perf tool for ARM with
a 3.17-rc6 kernel:


arch/arm/util/unwind-libunwind.c: In function ?libunwind__arch_reg_id?:
arch/arm/util/unwind-libunwind.c:43:3: error: implicit declaration of function ?pr_err? [-Werror=implicit-function-declaration]
   pr_err("unwind: invalid reg id %d\n", regnum);
   ^
arch/arm/util/unwind-libunwind.c:43:3: error: nested extern declaration of ?pr_err? [-Werror=nested-externs]
  CC       arch/arm/tests/regs_load.o
  CC       arch/arm/tests/dwarf-unwind.o
cc1: all warnings being treated as errors
Makefile.perf:655: recipe for target 'arch/arm/util/unwind-libunwind.o' failed
make[1]: *** [arch/arm/util/unwind-libunwind.o] Error 1
make[1]: *** Waiting for unfinished jobs....
  CC       util/probe-finder.o
arch/arm/tests/dwarf-unwind.c: In function ?sample_ustack?:
arch/arm/tests/dwarf-unwind.c:20:3: error: implicit declaration of function ?pr_debug? [-Werror=implicit-function-declaration]
   pr_debug("failed to allocate sample uregs data\n");
   ^
arch/arm/tests/dwarf-unwind.c:20:3: error: nested extern declaration of ?pr_debug? [-Werror=nested-externs]
cc1: all warnings being treated as errors
Makefile.perf:655: recipe for target 'arch/arm/tests/dwarf-unwind.o' failed
make[1]: *** [arch/arm/tests/dwarf-unwind.o] Error 1
Makefile:68: recipe for target 'all' failed
make: *** [all] Error 2


Can you take a look please?


Will