[OE-core] [PATCH] perf: Add LDFLAGS to allow build of old kernels without patching

[Otavio Salvador]

On Wed, Sep 18, 2013 at 12:19 PM, Enrico Scholz
<enrico.scholz at sigma-chemnitz.de> wrote:
> Bruce Ashfield <bruce.ashfield-Re5JQEeQqe8AvxtiuMwx3w at public.gmane.org>
> writes:
>
>>>> +LDFLAGS="-ldl -lutil"
>>>
>>> What is with -Wl,-as-needed or the gnu-hash ldflags which are applied
>>> usually?  Perhaps, hacks like
>>
>> We don't want to influence the perf build from the build system, unless we
>> absolutely have to. We want to use the flags and configs that are contained
>> within the kernel, just as we do with anything from the kernel tree in
>> general.
>
> Userspace programs should always be built with optimization flags of the
> build system.  E.g. it would be wrong when packages override our idea of
> optimization (-Os/-O2/-O6), generation of debug symbols or stripping of
> debug symbols.
>
> Kernel itself is an exception because it is tied very much to gcc and
> its behaviour.  But things like
>
> | CFLAGS = -fno-omit-frame-pointer -ggdb3
>
> in the perf Makefile must be overridable by the build system.

I don't agree on this. perf is tied to kernel and part of its code so
I think same exception rule apply for it as well.

-- 
Otavio Salvador                             O.S. Systems
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