https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81615
--- Comment #10 from Ben Barrowes <barrowes at alum dot mit.edu> --- The reason the stdout redirection doesn't work for me is because I want to save these preprocessed files during a "make" session. When I make, thousands of fotran files are preprocessed and compiled. How do I save the stdout from each one into its own directory?