]> git.baikalelectronics.ru Git - kernel.git/commit
perf tools: Force fixdep compilation at the start of the build
authorJiri Olsa <jolsa@kernel.org>
Tue, 6 Dec 2016 13:18:49 +0000 (14:18 +0100)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Tue, 6 Dec 2016 16:23:02 +0000 (13:23 -0300)
commitb1ef81bbfc167c83344632365a7ec08ce64be56b
tree60d39f933f61de1d662fce662950deb77f66b712
parent9cba484d6de2729626cdb019c8b0819e3c4e85c9
perf tools: Force fixdep compilation at the start of the build

The fixdep tool needs to be built before everything else, because it fixes
every object dependency file.

We handle this currently by making all objects to depend on fixdep, which is
error prone and is easily forgotten when new object is added.

Instead of this, this patch force fixdep tool to be built as the first target
in the separate make session. This way we don't need to handle extra fixdep
dependencies and we are certain there's no fixdep race with any parallel make
job.

Committer notes:

Testing it:

Before:

  $ rm -rf /tmp/build/perf/ ; mkdir -p /tmp/build/perf ; make -k O=/tmp/build/perf -C tools/perf install-bin
  make: Entering directory '/home/acme/git/linux/tools/perf'
    BUILD:   Doing 'make -j4' parallel build

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

    GEN      /tmp/build/perf/common-cmds.h
    HOSTCC   /tmp/build/perf/fixdep.o
    HOSTLD   /tmp/build/perf/fixdep-in.o
    LINK     /tmp/build/perf/fixdep
    MKDIR    /tmp/build/perf/pmu-events/
    HOSTCC   /tmp/build/perf/pmu-events/json.o
    MKDIR    /tmp/build/perf/pmu-events/
    HOSTCC   /tmp/build/perf/pmu-events/jsmn.o
    HOSTCC   /tmp/build/perf/pmu-events/jevents.o
    HOSTLD   /tmp/build/perf/pmu-events/jevents-in.o
    PERF_VERSION = 4.9.rc8.g868cd5
    CC       /tmp/build/perf/perf-read-vdso32
  <SNIP>

After:

  $ rm -rf /tmp/build/perf/ ; mkdir -p /tmp/build/perf ; make -k O=/tmp/build/perf -C tools/perf install-bin
  make: Entering directory '/home/acme/git/linux/tools/perf'
    BUILD:   Doing 'make -j4' parallel build
    HOSTCC   /tmp/build/perf/fixdep.o
    HOSTLD   /tmp/build/perf/fixdep-in.o
    LINK     /tmp/build/perf/fixdep

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

    GEN      /tmp/build/perf/common-cmds.h
    MKDIR    /tmp/build/perf/fd/
    CC       /tmp/build/perf/fd/array.o
    LD       /tmp/build/perf/fd/libapi-in.o
    MKDIR    /tmp/build/perf/fs/
    CC       /tmp/build/perf/event-parse.o
    CC       /tmp/build/perf/fs/fs.o
    PERF_VERSION = 4.9.rc8.g57a92f
    CC       /tmp/build/perf/event-plugin.o
    MKDIR    /tmp/build/perf/fs/
    CC       /tmp/build/perf/fs/tracing_path.o
  <SNIP>

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1481030331-31944-3-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/perf/Makefile.perf