[Digikam-devel] Customizing compiler options for a plugin

[Peter Heckert]

Hi,

If I wanted to set the -ffast-math compiler option for the 
Noisereduction plugin,
how should I do this?

Reason:
Converting float to int is rather expensive at least for the i386 family 
of CPU's,
because the default rounding mode for the FPU must be temporarily changed.
In addition this will delete the pipeline in FPU.
This affects all (int) typecasts  and all  floor() or ceil() invocations.

There are other optimizations possible (e.g. do not expand float 
constants to double)

Peter