From the blog post:
Compile fast_math code from other program separately and then
link it. This is easy solution. However this is a step back to
To introduce a @fast_math attribute. This is hard to realize.
But I hope this will be done for future compilers.<
One solution is to copy one of the features of Lisp, that is
offer an annotation to specify different compilation switches for
Since some time it's present in GNU-C too: