http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49149
--- Comment #9 from Zaak <zbeekman at gmail dot com> 2011-08-31 22:34:46 UTC --- Additionally, if my entire premise is wrong what do you anticipate the use of the -M flag will be for? It's not hard to figure out that .o files depend on the .f90 files with the same name. I don't need a tool to do that for me, so how do you envision -M being used? Not the way listed on the GNUmake online documentation?