I hope this to be the last question. While configuring, I see a warning message as follows from "config.log". ====================================================== ld: warning: libintlc.so.5, needed by /opt/intel/composer_xe_2013_sp1.0.080/compiler/lib/intel64/libifport.so.5, not found (try using -rpath or -rpath-link) ====================================================== I googled a bit and found out that this is about an intel library issue. And it says about $LD_LIBRARY_PATH and so on. Well, but my $LD_LIBRARY_PATH has the directory where "libintlc.so.5" is. ====================================================== simba@asterix:/opt/mpich/mpich-3.0.4-build$ echo $LD_LIBRARY_PATH */opt/intel/composer_xe_2013_sp1.0.080/compiler/lib/intel64* :/opt/intel/composer_xe_2013_sp1.0.080/mpirt/lib/intel64:/opt/intel/composer_xe_2013_sp1.0.080/ipp/../compiler/lib/intel64:/opt/intel/composer_xe_2013_sp1.0.080/ipp/lib/intel64:/opt/intel/composer_xe_2013_sp1.0.080/compiler/lib/intel64:/opt/intel/composer_xe_2013_sp1.0.080/mkl/lib/intel64:/opt/intel/composer_xe_2013_sp1.0.080/tbb/lib/intel64/gcc4.4 simba@asterix:/opt/mpich/mpich-3.0.4-build$ ====================================================== If I go on to "make", then it shows following warnings from the screen. ====================================================== ld: warning: libimf.so, needed by /opt/mpich/mpich-3.0.4-build/src/mpl/.libs/libmpl.so, not found (try using -rpath or -rpath-link) ld: warning: libsvml.so, needed by /opt/mpich/mpich-3.0.4-build/src/mpl/.libs/libmpl.so, not found (try using -rpath or -rpath-link) ld: warning: libirng.so, needed by /opt/mpich/mpich-3.0.4-build/src/mpl/.libs/libmpl.so, not found (try using -rpath or -rpath-link) ld: warning: libintlc.so.5, needed by /opt/mpich/mpich-3.0.4-build/src/mpl/.libs/libmpl.so, not found (try using -rpath or -rpath-link) ====================================================== If I keep proceed and install MPICH, "mpiexec" seems to work. I tested with "cpi" in example. The problem is, when I try to install PETSc, it complains about the same issue (missing those *.so(.5) files) and don't configure any more. I tried "--download-mpich=1" option from PETSc without installing MPICH separately, but the result was the same. It keeps complaining those missing(?) files, which are actually in * /opt/intel/composer_xe_2013_sp1.0.080/compiler/lib/intel64* directory. Does anyone has an idea what else can I do? Seungbum