linux-kernel - Re: [PATCH v3 0/9] perf build: Make build-test faster

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Date:	Fri, 15 Jan 2016 11:36:16 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	Wang Nan <wangnan0@...wei.com>, linux-kernel@...r.kernel.org,
	pi3orama@....com, lizefan@...wei.com
Subject: Re: [PATCH v3 0/9] perf build: Make build-test faster

Em Fri, Jan 15, 2016 at 11:20:05AM +0100, Jiri Olsa escreveu:
> On Fri, Jan 15, 2016 at 04:00:12AM +0000, Wang Nan wrote:
> > Utilise Jiri's feature-dump make target to avoid make build-test check
> > features too many times.
> > 
> > v2 -> v3: add $(O_OPT) to 'make clean' to ensure the correctness of
> >           config-clean.
> > 
> > Jiri Olsa (2):
> >   perf build: Add feature-dump target
> >   perf build: Introduce FEATURES_DUMP make variable
> > 
> > Wang Nan (7):
> >   perf build: Set parallel making options build-test
> >   perf build: Pass O option to Makefile.perf in build-test
> >   perf build: Test correct path of perf in build-test
> >   perf build: Pass O option to kernel makefile in build-test
> >   tools build: Allow subprojects select all feature checkers
> >   perf build: Select all feature checkers for feature-dump
> >   perf build: Use feature dump file for build-test
> > 
> >  tools/build/Makefile.feature | 21 ++++++++++-
> >  tools/perf/Makefile.perf     | 34 +++++++++++++++++-
> >  tools/perf/config/Makefile   |  4 +++
> >  tools/perf/tests/make        | 86 ++++++++++++++++++++++++++++++++++++--------
> >  4 files changed, 128 insertions(+), 17 deletions(-)
> 
> got error on:
> 
> [jolsa@...va perf]$ make -f tests/make 
> Testing Makefile
> readlink: missing operand
> Try 'readlink --help' for more information.
> - /BUILD_TEST_FEATURE_DUMP: cd . && make FEATURE_DUMP_COPY=/BUILD_TEST_FEATURE_DUMP  feature-dump
> cd . && make FEATURE_DUMP_COPY=/BUILD_TEST_FEATURE_DUMP feature-dump
> tests/make:329: recipe for target '/BUILD_TEST_FEATURE_DUMP' failed
> make[1]: *** [/BUILD_TEST_FEATURE_DUMP] Error 2
> tests/make:7: recipe for target 'all' failed
> make: *** [all] Error 2

You mean with all patches applied, right? I haven't got that far, first
and second patches are ok by now, I'm failing at patch 3, checking if
setting up the python stuff to honour O= is in a later patch...

[acme@zoo linux]$ rm -rf /tmp/build/perf ; mkdir -p /tmp/build/perf ; make -C tools/perf O=/tmp/build/perf build-test
make: Entering directory '/home/git/linux/tools/perf'
Testing Makefile
- make_no_ui: cd . && make -f Makefile   DESTDIR=/tmp/tmp.RYVWn1yMBU NO_NEWT=1 NO_SLANG=1 NO_GTK2=1
- make_tags: cd . && make -f Makefile   DESTDIR=/tmp/tmp.iNjVFs9Eje tags - make_python_perf_so: cd . && make -f Makefile DESTDIR=/tmp/tmp.mvHDSUV1pl python/perf.so
cd . && make -f Makefile DESTDIR=/tmp/tmp.mvHDSUV1pl python/perf.so
  BUILD:   Doing 'make -j4' parallel build

Auto-detecting system features:
...                         dwarf: [ on  ]
...                         glibc: [ on  ]
...                          gtk2: [ on  ]
...                      libaudit: [ on  ]
...                        libbfd: [ on  ]
...                        libelf: [ on  ]
...                       libnuma: [ on  ]
...        numa_num_possible_cpus: [ on  ]
...                       libperl: [ on  ]
...                     libpython: [ on  ]
...                      libslang: [ on  ]
...                     libunwind: [ on  ]
...            libdw-dwarf-unwind: [ on  ]
...                          zlib: [ on  ]
...                          lzma: [ on  ]
...                     get_cpuid: [ on  ]
...                           bpf: [ on  ]

make[4]: Nothing to be done for 'python/perf.so'.
  test: test -f /tmp/build/perf/python/perf.so
tests/make:272: recipe for target 'make_python_perf_so' failed
make[2]: *** [make_python_perf_so] Error 1
tests/make:7: recipe for target 'all' failed
make[1]: *** [all] Error 2
Makefile:81: recipe for target 'build-test' failed
make: *** [build-test] Error 2
make: Leaving directory '/home/git/linux/tools/perf'
[acme@zoo linux]$ find . -name "*.so"
./tools/perf/python_ext_build/lib/perf.so
./tools/perf/python/perf.so
[acme@zoo linux]$

I.e. the test -f follows O=, but the process to generate python/perf.so
doesn't and ends up pollutting the source tree.

- Arnaldo