# before compile() is called (and after new())
$cbuilder->{config}->{ccflags} =~ s/(?<=\s)\-O[0-9]{0,2}(?=\s|$)//g; # remove -OXX
$cbuilder->{config}->{ccflags} =~ s/(?<=\s)\-g(?=\s|$)//g # remove -g