Dear mpich community, I'm getting numerous libmpich.so: undefined reference to XXX errors when building Delft3D (a CFD costal/river model). I've read the log files, Googled, and rtm'ed to no avail. I hope that the mpich mailing list can help me out. I am running Red Hat Enterprise 6.3 64-bit, and I am building mpich 1.4.1. I have been able to build mpich successfully (I think...the examples described in the README file work) using the commands shown below. I'm using the Intel 2013 Fortran compiler, and I'm using the -enabled-shared, CFLAGS="-fPIC" and CXXFLAGS="-fPIC" switches because of a previous Delft3D build error saying to build mpich with the -fPIC switch. configure --prefix=/home/labuser/mpich2-install --enable-shared CFLAGS="-fPIC" CXXFLAGS="-fPIC" F77=ifort FC=ifort |& tee c.txt make 2>&1 | tee m.txt make install 2>&1 | tee mi.txt When building Delft3D (again with the Intel compiler) I get the following errors in the make log. I've included my log files as attachments. Any suggestions on how to address this will be greatly appreciated? libNefis.a ../../../../../engines_gpl/waq/packages/waq_utils_f/src/interact/.libs/l ibinteract.a ../../../../../engines_gpl/waq/packages/waq_utils_c/src/.libs/libwaq_uti ls_c.a ../../../../../engines_gpl/waq/packages/delwaq2_version_number/src/.libs /libdelwaq2_version_number.a -lfmpich -lmpich -lpthread -ldl -lrt -lexpat -lstdc++ -fopenmp -threads /home/labuser/mpich2-install/lib/libmpich.so: undefined reference to `MPL_trid' /home/labuser/mpich2-install/lib/libmpich.so: undefined reference to `MPL_trvalid' /home/labuser/mpich2-install/lib/libmpich.so: undefined reference to `MPL_env2int' /home/labuser/mpich2-install/lib/libmpich.so: undefined reference to `MPL_trrealloc' /home/labuser/mpich2-install/lib/libmpich.so: undefined reference to `MPL_trspace' /home/labuser/mpich2-install/lib/libmpich.so: undefined reference to `MPL_trDebugLevel' /home/labuser/mpich2-install/lib/libmpich.so: undefined reference to `MPL_TrSetMaxMem' /home/labuser/mpich2-install/lib/libmpich.so: undefined reference to `MPL_trlevel' /home/labuser/mpich2-install/lib/libmpich.so: undefined reference to `MPL_trmalloc' /home/labuser/mpich2-install/lib/libmpich.so: undefined reference to `MPL_env2bool' /home/labuser/mpich2-install/lib/libmpich.so: undefined reference to `MPL_env2range' /home/labuser/mpich2-install/lib/libmpich.so: undefined reference to `MPL_trcalloc' /home/labuser/mpich2-install/lib/libmpich.so: undefined reference to `MPL_trfree' /home/labuser/mpich2-install/lib/libmpich.so: undefined reference to `MPL_env2str' /home/labuser/mpich2-install/lib/libmpich.so: undefined reference to `MPL_trstrdup' /home/labuser/mpich2-install/lib/libmpich.so: undefined reference to `MPL_trdump' /home/labuser/mpich2-install/lib/libmpich.so: undefined reference to `MPL_trinit' make[5]: *** [delwaq2] Error 1 make[5]: Leaving directory `/home/labuser/Delft3D/2367/src/engines_gpl/waq/packages/delwaq2/src' make[4]: *** [install-recursive] Error 1 make[4]: Leaving directory `/home/labuser/Delft3D/2367/src/engines_gpl/waq/packages/delwaq2' make[3]: *** [install-recursive] Error 1 make[3]: Leaving directory `/home/labuser/Delft3D/2367/src/engines_gpl/waq/packages' make[2]: *** [install-recursive] Error 1 make[2]: Leaving directory `/home/labuser/Delft3D/2367/src/engines_gpl/waq' make[1]: *** [install-recursive] Error 1 make[1]: Leaving directory `/home/labuser/Delft3D/2367/src/engines_gpl' make: *** [install-recursive] Error 1 Thanks, Matt -- T. Matthew Boyington Civil Engineer, Water Resources Hydrothermal Team River Operations & Renewables Tennessee Valley Authority 400 West Summit Hill Drive, Knoxville, TN 37902 Office: (865) 632-8365 Cell: (865) 599-8265 <<mi.zip>> <<config_openpa.zip>> <<config.zip>> <<c.zip>> <<m.zip>>