FreeBSD
Here you find information about the system https://freebsd.org/.
To build gpaw add to the gpaw/customize.py
:
compiler='gcc44'
extra_compile_args += ['-Wall', '-std=c99']
library_dirs += ['/usr/local/lib']
libraries += ['blas', 'lapack', 'gfortran']
If you want to build a parallel version install mpich2 (net/mpich2). Openmpi does currently not work with gpaw!