<div>Dear GMXers</div>
<div>I got the error message " cannot compute sizeof (int)" when I tried to configure GMX3.3.1 on IBM PPC p575 AIX5.3, this is how I did it:</div>
<div> </div>
<div>for fftw2.1.5</div>
<div>export CC="xlc_r -q64 -qhot"<br>export CXX="xlC_r -q64 -qhot"<br>export OBJECT_MODE=64<br>export FFLAGS="-O3 -qarch=pwr4 -qtune=pwr4 -qmaxmem=-1"<br>export CFLAGS="-O3 -qarch=pwr4 -qtune=pwr4 -qmaxmem=-1"
<br>./configure --prefix=/home/usr/programs/fftw215 --enable-float --enable-mpi --enable-thread</div>
<div>make</div>
<div>make install</div>
<div> </div>
<div>for GMX3.3.1</div>
<div><br>export CPPFLAGS=-I/home/usr/programs/fftw215/include<br>export LDFLAGS=-I/home/usr/programs/fftw215/lib<br>./configure --prefix=/home/usr/programs/gromacs331mpi --with-fft=fftw2 --without-x --disable-fortran --enable-mpi --enable-float
<br></div>
<div>then I got the following error:</div>
<div>checking size of int... configure: error: cannot compute sizeof (int), 77</div>
<div> </div>
<div>have you guys ever experienced this problem before? Any suggestions are appreciated!</div>
<div> </div>
<div>Yours</div>
<div>Xin</div>