Am 13.01.2016 00:53 schrieb "Peter" <pe...@pblackman.plus.com>: > But what about optimising the RTL to -O4? > > I did a separate pass to build the RTL with -O4 which 2.64 does not > support. I found it makes a useful difference to the execution speed of > some programs.
There is a variant of the OPT parameter that applies options only for the last compilation. This way you can use options that the compiling compiler does not yet support. Now if I'd only remember that... -.- (for cross compilation one can use CROSS_OPT) Regards, Sven
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