[patch] Profiler Configuration Options

[Don McCoy]

This patch adds the ability to enable/disable the profiler or selected 
portions.  The new option is:

   --enable-profiler=type  Specify list of areas to profile. Choices include
                           none, all or a combination of: signal, 
matvec, fns
                           and user. Default is none.

There is a built-in dependency on the timer or it produces an error at 
configuration time.  The timer has also been renamed to help avoid 
confusion.

Although there are four options, only signal and matvec are implemented 
yet.  The former controls profiling of FFT's, Convolutions etc. (all 
part of the signal processing portion of the standard) and the latter 
controls profiling of matrix-vector functions like dot-product and 
matrix multiplication.

Regards,

-- 
Don McCoy
don (at) CodeSourcery
(888) 776-0262 / (650) 331-3385, x712
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