[oe] profiling howto?

[Steffen Sledz]

Am 03.02.2011 09:54, schrieb Jan Paesmans:
> On Thu, Feb 3, 2011 at 9:30 AM, Steffen Sledz <sledz at dresearch.de> wrote:
>> Am 02.02.2011 13:59, schrieb Steffen Sledz:
>>> Am 02.02.2011 10:54, schrieb Steffen Sledz:
>>>> Has anybody some instructions/hints how to enable profiling
>>>> support for selected libs and/or binaries in OE?
>>>
>>> The local.conf.sample does contain this section:
>>>
>>> # Uncomment these to build a package such that you can use gprof to profile it.
>>> # NOTE: This will only work with 'linux' targets, not
>>> # 'linux-uclibc', as uClibc doesn't provide the necessary
>>> # object files.  Also, don't build glibc itself with these
>>> # flags, or it'll fail to build.
>>> #
>>> # PROFILE_OPTIMIZATION = "-pg"
>>> # SELECTED_OPTIMIZATION = "${PROFILE_OPTIMIZATION}"
>>> # LDFLAGS =+ "-pg"
>>>
>>> This seems to do the work for the complete image.
>>
>> Hmmmm? Unfortunately not in all cases. Enabling the options mentioned above and making a clean build results in
>>
>>  | ...
>>  | checking for .preinit_array/.init_array/.fini_array support... no
>>  | configure: error: Need linker with .init_array/.fini_array support.
>>  | ERROR: Function do_configure failed
>>  NOTE: package glibc-2.9-r36.3: task do_configure: Failed
>>  ERROR: TaskFailed event exception, aborting
>>  ERROR: Build of /home/sledz/work/openembedded/recipes/glibc/glibc_2.9.bb do_configure failed
>>  ERROR: Task 127 (/home/sledz/work/openembedded/recipes/glibc/glibc_2.9.bb, do_configure) failed with 256
>>
>> Any ideas?
>>
>
> In the config.log from the build directory you should find the
> original error on which the linker failed.
> The check in the configure step can fail because of multiple reasons.

There's no config.log after do_configure. :(
Just the output from temp/log.do_configure.26037.

Steffen

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