[oe] profiling howto?

[Khem Raj]

On Thu, Feb 3, 2011 at 6:25 AM, Phil Blundell <philb at gnu.org> wrote:
> On Thu, 2011-02-03 at 12:11 +0000, Phil Blundell wrote:
>> On Thu, 2011-02-03 at 13:07 +0100, Steffen Sledz wrote:
>> > conftest.c:(.text+0xc): undefined reference to `mcount'
>>
>> That looks like your C library was either built without profiling
>> support, or is using a different profiling ABI.  (I think there was a
>> change in this area for ARM EABI sometime around gcc 4.4, and glibc
>> might not have caught up with it.)
>
> Oh, I just noticed that it's glibc itself you're trying to build with
> profiling on.  You need to not do that, or at least not by the mechanism
> you're trying to use.  If you really want to profile glibc itself then
> there is an --enable-profile configure option which will do the right
> thing.  Otherwise, you need to suppress the PROFILE_OPTIMIZATION when
> building glibc.

in addition make sure that _p versions of libc (libc_p.a) are staged
so you get libc function into profile data

>
> p.
>
>
>
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