linux-kernel - RE: [PATCH] perf arm pmu: fix build error on MUSL libc

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Date:   Mon, 7 Dec 2020 20:58:09 +0900
From:   "Chanho Park" <chanho61.park@...sung.com>
To:     "'Will Deacon'" <will@...nel.org>,
        "'Chanho Park'" <parkch98@...il.com>
Cc:     <mathieu.poirier@...aro.org>, <suzuki.poulose@....com>,
        <coresight@...ts.linaro.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        "'Mike Leach'" <mike.leach@...aro.org>,
        "'Leo Yan'" <leo.yan@...aro.org>,
        "'John Garry'" <john.garry@...wei.com>,
        "'Peter Zijlstra'" <peterz@...radead.org>,
        "'Ingo Molnar'" <mingo@...hat.com>,
        "'Arnaldo Carvalho de Melo'" <acme@...nel.org>,
        "'Mark Rutland'" <mark.rutland@....com>,
        "'Jiri Olsa'" <jolsa@...hat.com>,
        "'Namhyung Kim'" <namhyung@...nel.org>,
        "'Khem Raj'" <raj.khem@...il.com>
Subject: RE: [PATCH] perf arm pmu: fix build error on MUSL libc

Hi Will,
 
> Looks like other files just include this unconditionally, but have a
> comment explaining why. See util/branch.h and util/event.h. Maybe we
> should do the same for util/pmu.h, which is already included here?

I found below files which perf includes <linux/perf_event.h>. Instead of
doing same for all, we'd better put this only for
tools/include/uapi/linux/perf_event.h.

--- a/tools/include/uapi/linux/perf_event.h
+++ b/tools/include/uapi/linux/perf_event.h
@@ -17,6 +17,9 @@
 
 #include <linux/types.h>
 #include <linux/ioctl.h>
+#if !defined(__GLIBC__)
+#include <linux/stddef.h>
+#endif
 #include <asm/byteorder.h>
 
 /*

tools/perf/arch/arm/util/pmu.c:#include <linux/perf_event.h>
tools/perf/arch/x86/util/pmu.c:#include <linux/perf_event.h>
tools/perf/arch/x86/util/tsc.c:#include <linux/perf_event.h>
tools/perf/lib/include/internal/evsel.h:#include <linux/perf_event.h>
tools/perf/lib/include/perf/event.h:#include <linux/perf_event.h>
tools/perf/lib/tests/test-evlist.c:#include <linux/perf_event.h>
tools/perf/lib/tests/test-evsel.c:#include <linux/perf_event.h>
tools/perf/tests/hists_common.c:#include <linux/perf_event.h>
tools/perf/util/auxtrace.c:#include <linux/perf_event.h>
tools/perf/util/auxtrace.h:#include <linux/perf_event.h>
tools/perf/util/branch.h:#include <linux/perf_event.h>
tools/perf/util/event.c:#include <linux/perf_event.h>
tools/perf/util/evsel.c:#include <linux/perf_event.h>
tools/perf/util/evsel.h:#include <linux/perf_event.h>
tools/perf/util/header.h:#include <linux/perf_event.h>
tools/perf/util/mem-events.h:#include <linux/perf_event.h>
tools/perf/util/namespaces.h:#include <linux/perf_event.h>
tools/perf/util/record.h:#include <linux/perf_event.h>
tools/perf/util/session.h:#include <linux/perf_event.h>
tools/perf/util/pmu.h:#include <linux/perf_event.h>
tools/perf/util/synthetic-events.c:#include <linux/perf_event.h>
tools/perf/util/parse-events.h:#include <linux/perf_event.h>
tools/perf/util/perf_event_attr_fprintf.c:#include <linux/perf_event.h>

Best Regards,
Chanho Park