Here is a patch that got swh plugins built for me on FC4 gcc version 4.0.0 20050519 (Red Hat 4.0.0-8) the original fails on gcc4 for both use of a removed optimize option -fmove-all-movables and for declaring an already defined non-static variable as static. More on the removed optimization flag here: http://gcc.gnu.org/gcc-4.0/changes.html The options |-freduce-all-givs| and |-fmove-all-movables| have been discontinued. They were used to circumvent a shortcoming in the heuristics of the old loop optimization code with respect to common Fortran constructs. The new (tree) loop optimizer works differently and doesn't need those work-arounds. -- http://nostar.net/