massimiliano cialdi wrote: > I think that -O1 is an alias for a list of optimization parametr as > reported in gcc manual, so if I want to anable only one parameter at Your interpretation of the manual is incorrect. Note in particular the passage that says "Not all optimizations are controlled directly by a flag. Only optimizations that have a flag are listed." This is telling you that -O is not equivalent to a set of -f options. Brian
