linux-kernel - Re: [PATCH v2 3/9] perf build: Test correct path of perf in build-test

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Message-ID: <20160114160202.GW18367@kernel.org>
Date:	Thu, 14 Jan 2016 13:02:02 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	pi3orama <pi3orama@....com>
Cc:	Wang Nan <wangnan0@...wei.com>, jolsa@...hat.com,
	linux-kernel@...r.kernel.org, lizefan@...wei.com,
	Jiri Olsa <jolsa@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>
Subject: Re: [PATCH v2 3/9] perf build: Test correct path of perf in
 build-test

Em Thu, Jan 14, 2016 at 12:44:36PM -0300, Arnaldo Carvalho de Melo escreveu:
> If I try it manually, in the source tree:
> 
> [acme@...icio linux]$ cd tools/perf
> [acme@...icio perf]$ make LDFLAGS=-static
>   BUILD:   Doing 'make -j4' parallel build
>   GEN      libtraceevent-dynamic-list
>   LINK     libperf-gtk.so
> /usr/bin/ld: /usr/lib/gcc/x86_64-redhat-linux/4.8.5/crtbeginT.o: relocation R_X86_64_32 against `__TMC_END__' can not be used when making a shared object; recompile with -fPIC
> /usr/lib/gcc/x86_64-redhat-linux/4.8.5/crtbeginT.o: could not read symbols: Bad value
> collect2: error: ld returned 1 exit status
> make[1]: *** [libperf-gtk.so] Error 1
> make: *** [all] Error 2
> [acme@...icio perf]$
> 
> And if I do a make clean and try again, it works:

[acme@...icio linux]$ git log --oneline -5
be874d2f8baa perf build: Test correct path of perf in build-test
dab97c905927 perf build: Pass O option to Makefile.perf in build-test
7d66631ea112 perf build: Set parallel making options build-test
69d5f8e92f05 perf symbols: Fix reading of build-id from vDSO
8bf78e69a277 perf kvm record/report: 'unprocessable sample' error while
recording/reporting guest data
[acme@...icio linux]$

So, with that hunch, I tried with the patch below and it finishes a
'make -C tools/perf build-test' run with no find .cmd errors not
'make_static' failures, investigating what is the problem with the
'clean' target when it gets a O= passed...

[acme@...icio linux]$ git diff
diff --git a/tools/perf/tests/make b/tools/perf/tests/make
index e74c86b00c31..baf8f0099507 100644
--- a/tools/perf/tests/make
+++ b/tools/perf/tests/make
@@ -266,7 +266,8 @@ endif
 
 MAKEFLAGS := --no-print-directory
 
-clean := @(cd $(PERF); make -s -f $(MK) O=$(PERF_O) clean >/dev/null)
+#clean := @(cd $(PERF); make -s -f $(MK) O=$(PERF_O) clean >/dev/null)
+clean := @(cd $(PERF); make -s -f $(MK) clean >/dev/null)
 
 $(run):
        $(call clean)
[acme@...icio linux]$