[oe] profiling howto?

[Steffen Sledz]

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?

Steffen

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