Daniel, Thanks. I'll take a stab at finding the harness routine tonight. Currently on Darwin, we have 38 errors at '-m64 -O3 -g' which are likely all due to the linker warnings issued when common blocks are involved in the fortran testsuite...
http://gcc.gnu.org/ml/fortran/2006-08/msg00214.html Do you still have a Mac? Any extra set of eyes on this problem would be most welcome because it is unclear if gfortran or ld64 is at fault. You will want to apply Geoff's proposed patch to provide the TImode symbols on Darwin... http://gcc.gnu.org/ml/gcc-patches/2006-08/msg00581.html ...otherwise you'll have to weed through another 800+ errors due to the missing TImode symbols that libgfortran uses. Jack