Subject: Re: [PATCH 05/53] perf tools: Test correct path of perf in build-test

From: Arnaldo Carvalho de Melo <[email-masked]>
Date: Mon, 11 Jan 2016 12:24:56 -0300

Em Mon, Jan 11, 2016 at 01:47:56PM +0000, Wang Nan escreveu:
> If an 'O' is passed to 'make build-test', many 'test -x' and 'test -f'
> will fail because perf resides in a different directory. Fix this by
> computing PERF_OUT according to 'O' and test correct output files.
> For make_kernelsrc and make_kernelsrc_tools, set KBUILD_OUTPUT_DIR
> instead because the path is different from others ($(O)/perf vs
>  $(O)/tools/perf).

Ok, applying up to this patch I now manage to almost cleanly build it using O=,
see below, but seems that we have some race, as not all tests end up producing
such warnings.

[acme@felicio linux]$ rm -rf /tmp/build/perf ; mkdir -p /tmp/build/perf ; make O=/tmp/build/perf -C tools/perf build-test
make: Entering directory `/home/acme/git/linux/tools/perf'
Testing Makefile
- make_no_libperl: cd . && make -f Makefile   DESTDIR=/tmp/tmp.m1nXBMqhSA NO_LIBPERL=1
find: ‘/tmp/build/perf/util/trace-event-scripting.o’: No such file or directory
find: ‘/tmp/build/perf/util/build-id.o’: No such file or directory
- make_no_libdw_dwarf_unwind: cd . && make -f Makefile   DESTDIR=/tmp/tmp.RB7Ile9C0b NO_LIBDW_DWARF_UNWIND=1
- make_no_backtrace: cd . && make -f Makefile   DESTDIR=/tmp/tmp.HeNpC0PW1O NO_BACKTRACE=1
find: ‘/tmp/build/perf/util/trace-event-scripting.o’: No such file or directory
find: ‘/tmp/build/perf/util/alias.o’: No such file or directory
- make_install_prefix: cd . && make -f Makefile   DESTDIR=/tmp/tmp.JPK5a72h53 install prefix=/tmp/krava
find: ‘/tmp/build/perf/libapi.a’: No such file or directory
- make_help: cd . && make -f Makefile   DESTDIR=/tmp/tmp.F3Z0qPtslS help
- make_doc: cd . && make -f Makefile   DESTDIR=/tmp/tmp.6a2HbvC2ej doc