When compiling Perf, the ARCH=arm option is not required since all the trace decoding solution is confined to tools/perf/util.

Option NO_LIBPERL=1 is also not mandatory but avoiding it can break compilation on systems where some libraries are missing, hence adding a comment on the topic.

Signed-off-by: Mathieu Poirier mathieu.poirier@linaro.org --- HOWTO.md | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/HOWTO.md b/HOWTO.md index f46982fafcb4..f828d6a068b7 100644 --- a/HOWTO.md +++ b/HOWTO.md @@ -194,7 +194,7 @@ directory. After that a new perf tool binary can be compiled:

linaro@t430:~/linaro/coresight/bkk16/$ cd perf-opencsd-4.5-rc6-bkk16 linaro@t430:~/linaro/coresight/bkk16/perf-opencsd-4.5-rc6-bkk16/$ export CSTRACE_PATH=~/linaro/coresight/bkk16/opencsd-bkk16/decoder - linaro@t430:~/linaro/coresight/bkk16/perf-opencsd-4.5-rc6-bkk16/$ make -C tools/perf ARCH=arm DEBUG=1 NO_LIBPERL=1 + linaro@t430:~/linaro/coresight/bkk16/perf-opencsd-4.5-rc6-bkk16/$ make -C tools/perf ... ... linaro@t430:~/linaro/coresight/bkk16/perf-opencsd-4.5-rc6-bkk16/$ ls -l tools/perf/perf @@ -205,6 +205,10 @@ variable telling the build scripts where to find the library is needed. If the `CSTRACE_PATH` variable is not defined the compilation will still be successful, but handling of CoreSight trace data won't be supported.

+When compiling Perf, some perl libraries may not be present on the host system. +Adding the "NO_LIBPERL=1" option will prevent the build script from complaining +too much. + At the end of the compilation a new perf binary is available in `tools/perf/`