linux-kernel - Re: [PATCH v9 4/4] perf tools: add support for libpfm4

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Message-ID: <20200416095050.GB369437@krava>
Date:   Thu, 16 Apr 2020 11:50:50 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Ian Rogers <irogers@...gle.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martin KaFai Lau <kafai@...com>, Yonghong Song <yhs@...com>,
        Andrii Nakryiko <andriin@...com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Igor Lubashev <ilubashe@...mai.com>,
        Alexey Budankov <alexey.budankov@...ux.intel.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Jiwei Sun <jiwei.sun@...driver.com>,
        yuzhoujian <yuzhoujian@...ichuxing.com>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Jin Yao <yao.jin@...ux.intel.com>,
        Leo Yan <leo.yan@...aro.org>,
        John Garry <john.garry@...wei.com>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        bpf@...r.kernel.org, linux-perf-users@...r.kernel.org,
        Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH v9 4/4] perf tools: add support for libpfm4

On Wed, Apr 15, 2020 at 11:35:51PM -0700, Ian Rogers wrote:

SNIP

> diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
> index 12a8204d63c6..26167ad38a47 100644
> --- a/tools/perf/Makefile.config
> +++ b/tools/perf/Makefile.config
> @@ -1012,6 +1012,18 @@ ifdef LIBCLANGLLVM
>    endif
>  endif
>  
> +ifndef NO_LIBPFM4
> +  ifeq ($(feature-libpfm4), 1)
> +    CFLAGS += -DHAVE_LIBPFM
> +    EXTLIBS += -lpfm
> +    ASCIIDOC_EXTRA = -aHAVE_LIBPFM=1
> +    $(call detected,CONFIG_LIBPFM4)
> +  else
> +    msg := $(warning libpfm4 not found, disables libpfm4 support. Please install libpfm4-dev);
> +    NO_LIBPFM4 := 1
> +  endif
> +endif

now when it's in FEATURE_TESTS_EXTRA it will not get detected,
unless you add the change below.. I wonder how come it was
still being detected for you.. might be bug in feature detection
stuff

jirka


---
diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index 26167ad38a47..b45c5d370b42 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -1013,6 +1013,7 @@ ifdef LIBCLANGLLVM
 endif
 
 ifndef NO_LIBPFM4
+  $(call feature_check,libpfm4)
   ifeq ($(feature-libpfm4), 1)
     CFLAGS += -DHAVE_LIBPFM
     EXTLIBS += -lpfm