Am 27.04.2009 um 14:02 schrieb Alexander Herz: > Hey guys, > > I'm getting a lot of errors trying to compile gromacs 4.0.4 with > ifort 9.1: > > gmx_fft_fftw3.c:(.text+0x7b2): undefined reference to > `fftwf_execute_dft_c2r' ^^^^^^^ Are you linking vs. double precision fftw library? Best Martin