I am having difficulty getting mpich 3.0.1 to build shared libs when I'm not using fortran; it still runs checks (against false) for the fortran compilers (even though I am requesting --disable-fc --disable-f77) and associated tools and predictably fails those tests, needlessly disabling the "build shared libs" var. Any thoughts? I've put the config.log [1] up on pastebin rather than attaching the half-meg file. You can see things go south in lines 498-579. Hopefully I've just missed something obvious... (This was building with clang; similar happens with llvm-gcc.) Thanks, Eric [1] http://pastebin.com/snr3VGdf