Hi,

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Can you try with a simple configure and just CC, CXX, and FC set, and nothing else?

Yes, now I used the following commands to configure the system.

../mpich-3.1.1/configure --prefix=/usr/local/mpich-3.1.1_64_gcc \ --libdir=/usr/local/mpich-3.1.1_64_gcc/lib64 \ --includedir=/usr/local/mpich-3.1.1_64_gcc/include64 \ CC="gcc" CXX="g++" F77="gfortran" FC="gfortran" \ CFLAGS="-m64" CXXFLAGS="-m64" FFLAGS="-m64" FCFLAGS="-m64" \ LDFLAGS="-m64 -L/usr/lib/sparcv9 -Wl,-rpath /usr/lib/sparcv9" \ |& tee log.configure.$SYSTEM_ENV.$MACHINE_ENV.64_gcc

Can you not set the additional flags and try?

Which additional flags do you mean? Originally I used the following command, from which I removed all options (as you requested). ../mpich-3.1.1/configure --prefix=/usr/local/mpich-3.1.1_64_gcc \ --libdir=/usr/local/mpich-3.1.1_64_gcc/lib64 \ --includedir=/usr/local/mpich-3.1.1_64_gcc/include64 \ CC="gcc" CXX="g++" F77="gfortran" FC="gfortran" \ CFLAGS="-m64" CXXFLAGS="-m64" FFLAGS="-m64" FCFLAGS="-m64" \ LDFLAGS="-m64 -L/usr/lib/sparcv9 -Wl,-rpath /usr/lib/sparcv9" \ --enable-f77 --enable-fc --enable-cxx --enable-romio \ --enable-debuginfo --enable-smpcoll \ --enable-threads=runtime --with-thread-package=posix \ --enable-shared \ |& tee log.configure.$SYSTEM_ENV.$MACHINE_ENV.64_gcc I can try to build "mpich" once more with gcc-4.9.0 on Solaris, if you tell me which configure-command I shall use. Thank you very much for your reply in advance. Kind regards Siegmar