Messages in this thread | | | Date | Tue, 5 May 2020 18:47:29 +0800 | From | Leo Yan <> | Subject | Re: perf build error with gcc 10 on arm and aarch64 |
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Hi Mike,
On Tue, May 05, 2020 at 11:26:49AM +0100, Mike Leach wrote: > Hi Leo, > > This is caused by GCC 10 new default to -fno-common. Temporarily > adding this to perf build reproduces issue with other compilers, > including x86 build of perf with cs-etm.
Good to know how to reproduce this issue.
> As such - your fix is good to resolve this issue. > > Tested by / Reviewed by Mike Leach <mike.leach@linaro.org>
Will send out patch to LKML soon.
Thank you for the testing and reviewing.
Thanks, Leo
> On Tue, 5 May 2020 at 05:11, Leo Yan <leo.yan@linaro.org> wrote: > > > > Hi Thomas, > > > > [ + Mathieu/Mike/Suzuki ] > > > > On Mon, May 04, 2020 at 10:22:27PM +0300, Thomas Backlund wrote: > > > 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 > > > > Thanks for reporting the issue. > > > > Could you help confirm if below change can resolve this issue? > > > > Thanks, > > Leo > > > > ---8<--- > > > > Subject: [PATCH] perf cs-etm: Move defined of traceid_list > > > > The variable 'traceid_list' is defined in the header file cs-etm.h, > > if multiple C files include cs-etm.h the compiler might complaint for > > multiple definition of 'traceid_list'. > > > > To fix multiple definition error, move the definition of 'traceid_list' > > into cs-etm.c. > > > > Signed-off-by: Leo Yan <leo.yan@linaro.org> > > --- > > tools/perf/util/cs-etm.c | 3 +++ > > tools/perf/util/cs-etm.h | 3 --- > > 2 files changed, 3 insertions(+), 3 deletions(-) > > > > diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c > > index 62d2f9b9ce1b..381d9708e9bd 100644 > > --- a/tools/perf/util/cs-etm.c > > +++ b/tools/perf/util/cs-etm.c > > @@ -94,6 +94,9 @@ struct cs_etm_queue { > > struct cs_etm_traceid_queue **traceid_queues; > > }; > > > > +/* RB tree for quick conversion between traceID and metadata pointers */ > > +static struct intlist *traceid_list; > > + > > static int cs_etm__update_queues(struct cs_etm_auxtrace *etm); > > static int cs_etm__process_queues(struct cs_etm_auxtrace *etm); > > static int cs_etm__process_timeless_queues(struct cs_etm_auxtrace *etm, > > diff --git a/tools/perf/util/cs-etm.h b/tools/perf/util/cs-etm.h > > index 650ecc2a6349..4ad925d6d799 100644 > > --- a/tools/perf/util/cs-etm.h > > +++ b/tools/perf/util/cs-etm.h > > @@ -114,9 +114,6 @@ enum cs_etm_isa { > > CS_ETM_ISA_T32, > > }; > > > > -/* RB tree for quick conversion between traceID and metadata pointers */ > > -struct intlist *traceid_list; > > - > > struct cs_etm_queue; > > > > struct cs_etm_packet { > > -- > > 2.17.1 > > > > -- > Mike Leach > Principal Engineer, ARM Ltd. > Manchester Design Centre. UK
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