[gmx-users] error installing fftw-2.15 with mpi in ia64 system

[Jesus Salgado]

Hi all,

We are trying Gromacs-3.2.1 in an Itanium II SGI Altix 3700 cluster.
Compilation without mpi goes smooth. Performance is also OK, for both single 
and double precision, with following benchmarks (for villin): 
5857.2ps/NODE.day (single); 5000.136ps/NODE.day (double).

But I am having trobles to compile fftw-2.1.5 with --enable-mpi. I get 
following error after Make:

 ../fftw/.libs/libsfftw.a(twiddle.o)(.text+0x852): In function 
`fftw_compute_rader_twiddle':
: undefined reference to `__libm_sincos'
../fftw/.libs/libsfftw.a(twiddle.o)(.text+0x11f2): In function 
`fftw_compute_twiddle':
: undefined reference to `__libm_sincos'
../fftw/.libs/libsfftw.a(twiddle.o)(.text+0x1762): In function 
`fftw_compute_twiddle':
: undefined reference to `__libm_sincos'
collect2: ld returned 1 exit status
make[1]: *** [test_sched] Error 1
make[1]: Leaving directory `/usus/sa/salgado/fftw-2.1.5/mpi'
make: *** [all-recursive] Error 1

I'm using the Intel compilers (version 8.1).

Any idea?

Thanks,
Jesus
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