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To:     <linux-kernel@vger.kernel.org>
CC:     Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>
From:   Thomas Backlund <tmb@mageia.org>
Subject: perf build error with gcc 10 on arm and aarch64
Message-ID: <2869c4f6-9adf-3d55-a41d-a42865ae56f2@mageia.org>
Date:   Mon, 4 May 2020 22:22:27 +0300
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This is building perf from kernel-5.6.10 on armv7hl and aarch64:

Compiler is gcc 10.1.0-RC


   LD       perf-in.o
ld: arch/perf-in.o: in function `.LANCHOR0':
/home/iurt/rpmbuild/BUILD/kernel-arm/linux-5.6/tools/perf/util/include/../../util/cs-etm.h:118: 
multiple definition of `traceid_list'; 
util/perf-in.o:/home/iurt/rpmbuild/BUILD/kernel-arm/linux-5.6/tools/perf/util/cs-etm.h:118: 
first defined here
make[3]: *** 
[/home/iurt/rpmbuild/BUILD/kernel-arm/linux-5.6/tools/build/Makefile.build:145: 
perf-in.o] Error 1

   LD       perf-in.o
ld: 
arch/perf-in.o:/home/iurt/rpmbuild/BUILD/kernel-aarch64/linux-5.6/tools/perf/util/include/../../util/cs-etm.h:118: 
multiple definition of `traceid_list'; 
util/perf-in.o:/home/iurt/rpmbuild/BUILD/kernel-aarch64/linux-5.6/tools/perf/util/cs-etm.h:118: 
first defined here
make[3]: *** 
[/home/iurt/rpmbuild/BUILD/kernel-aarch64/linux-5.6/tools/build/Makefile.build:145: 
perf-in.o] Error 1
make[2]: *** [Makefile.perf:616: perf-in.o] Error 2
make[1]: *** [Makefile.perf:225: sub-make] Error 2
make: *** [Makefile:70: all] Error 2


The same build succeeds with gcc 9.3.0

--


Thomas