Gfortran

Installed gfortran binary from here:

http://gcc.gnu.org/wiki/GFortranBinaries

• version for 64-bit intel processors
• version for
• unsuccessful at installing a fink version

Installing OpenMPI...

Configure throws this error:

configure:35860: checking if C and Fortran 77 are link compatible
configure:35910: /usr/bin/gcc -c -O3 -DNDEBUG -finline-functions -fno-strict-aliasing  conft
est_c.c
configure:35917: $? = 0
configure:35944: /usr/local/bin/gfortran -o conftest   conftest.f conftest_c.o  >&5
ld: warning: in conftest_c.o, file was built for unsupported file format which is not the architecture being linked (i386)

Problem was twofold: first, I needed to compile 64-bit binaries iwth the C compiler, which wasn't happening, because it was trying to create an i386 binary. Second, the fortran copmiler was producing an "unsupported file format".

I fixed the problem by adding -arch x86_64 to the C and Fortran compiler flags.