Hi, yesterday I tried to install mpich-3.1.2 on my machines (Solaris 10 Sparc, Solaris 10 x86_64, and openSUSE Linux 12.1 x86_64) with Sun C 5.12 and gcc-4.9.0 and failed with the following errors for Solaris 10. Solaris 10 Sparc: ================= tyr mpich-3.1.2-SunOS.sparc.64_gcc 209 head -8 config.log | grep mpich $ ../mpich-3.1.2/configure --prefix=/usr/local/mpich-3.1.2_64_gcc --libdir=/usr/local/mpich-3.1.2_64_gcc/lib64 --includedir=/usr/local/mpich-3.1.2_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 tyr mpich-3.1.2-SunOS.sparc.64_gcc 210 tyr mpich-3.1.2-SunOS.sparc.64_gcc 213 tail log.make.SunOS.sparc.64_gcc CXX src/binding/cxx/initcxx.lo CXXLD lib/libmpicxx.la ld: fatal: file libmpicxx.so.12: open failed: No such file or directory ld: fatal: file processing errors. No output written to lib/.libs/libmpicxx.so.12.0.2 collect2: error: ld returned 1 exit status make[2]: *** [lib/libmpicxx.la] Error 1 make[2]: Leaving directory `/export2/src/mpich-3.1.2/mpich-3.1.2-SunOS.sparc.64_gcc' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/export2/src/mpich-3.1.2/mpich-3.1.2-SunOS.sparc.64_gcc' make: *** [all] Error 2 tyr mpich-3.1.2-SunOS.sparc.64_gcc 214 Solaris 10 x86_64, gcc-4.9.0: ============================= tyr mpich-3.1.2-SunOS.x86_64.64_gcc 215 head -8 config.log | grep mpich $ ../mpich-3.1.2/configure --prefix=/usr/local/mpich-3.1.2_64_gcc --libdir=/usr/local/mpich-3.1.2_64_gcc/lib64 --includedir=/usr/local/mpich-3.1.2_64_gcc/include64 CC=gcc CXX=g++ F77=gfortran FC=gfortran CFLAGS=-m64 CXXFLAGS=-m64 FFLAGS=-m64 FCFLAGS=-m64 LDFLAGS=-m64 -L/usr/lib/amd64 -Wl,-rpath /usr/lib/amd64 --enable-f77 --enable-fc --enable-cxx --enable-romio --enable-debuginfo --enable-smpcoll --enable-threads=runtime --with-thread-package=posix --enable-shared tyr mpich-3.1.2-SunOS.x86_64.64_gcc 216 tyr mpich-3.1.2-SunOS.x86_64.64_gcc 216 tail log.make.SunOS.x86_64.64_gcc CXX src/binding/cxx/initcxx.lo CXXLD lib/libmpicxx.la ld: fatal: file libmpicxx.so.12: open failed: No such file or directory ld: fatal: file processing errors. No output written to lib/.libs/libmpicxx.so.12.0.2 collect2: error: ld returned 1 exit status make[2]: *** [lib/libmpicxx.la] Error 1 make[2]: Leaving directory `/export2/src/mpich-3.1.2/mpich-3.1.2-SunOS.x86_64.64_gcc' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/export2/src/mpich-3.1.2/mpich-3.1.2-SunOS.x86_64.64_gcc' make: *** [all] Error 2 tyr mpich-3.1.2-SunOS.x86_64.64_gcc 217 I get the following error, if I use "CFLAGS=-m64 -std=c11" to configure it on Solaris. tyr mpich-3.1.2-SunOS.sparc.64_gcc 231 tail -15 log.make.SunOS.sparc.64_gcc make[2]: Entering directory `/export2/src/mpich-3.1.2/mpich-3.1.2-SunOS.sparc.64_gcc/src/mpi/romio' make[3]: Entering directory `/export2/src/mpich-3.1.2/mpich-3.1.2-SunOS.sparc.64_gcc/src/mpi/romio' CC adio/common/ad_read.lo In file included from /usr/include/unistd.h:18:0, from ../../../../mpich-3.1.2/src/mpi/romio/adio/common/ad_read.c:14: /export2/prog/SunOS_sparc/gcc-4.9.0/lib/gcc/sparc-sun-solaris2.10/4.9.0/include-fixed/sys/feature_tests.h:346:2: error: #error "Compiler or options invalid for pre-UNIX 03 X/Open applications and pre-2001 POSIX applications" #error "Compiler or options invalid for pre-UNIX 03 X/Open applications \ ^ make[3]: *** [adio/common/ad_read.lo] Error 1 make[3]: Leaving directory `/export2/src/mpich-3.1.2/mpich-3.1.2-SunOS.sparc.64_gcc/src/mpi/romio' make[2]: *** [all-recursive] Error 1 make[2]: Leaving directory `/export2/src/mpich-3.1.2/mpich-3.1.2-SunOS.sparc.64_gcc/src/mpi/romio' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/export2/src/mpich-3.1.2/mpich-3.1.2-SunOS.sparc.64_gcc' make: *** [all] Error 2 I would be grateful, if somebody can fix the problem. Thank you very much for any help in advance. Kind regards Siegmar