Do you have Fortran enabled? If so, how do you get gfortran? Also, do you use open-mpi or mpich?Does your make check pass? Rajeev On Thu, 3 Dec, 2015 at 10:45, Lorenzo Alessio Botti<[email protected]> wrote: 636 Clang:*) 637 FATHOM_CXX_SPECIAL="$EXTRA_GNU_FLAGS -stdlib=libc++" 638 FATHOM_CXX_32BIT=-m32 639 FATHOM_CXX_64BIT=-m64 640 ;; 641 SunWorkshop:i?86|SunWorkshop:x86_64) 642 FATHOM_CXX_32BIT=-m32 643 FATHOM_CXX_64BIT=-m64 644 ;; 645 *) 646 ;; 647 esac 648 AC_MSG_RESULT([$cxx_compiler:$host_os:$host_cpu]) 649 650 # Check for specific overrides 651 CXX_LDFLAGS="" 652 if (test "$cxx_compiler:${host_os:0:6}" == "Clang:darwin"); then 653 CXX_LDFLAGS="$CXX_LDFLAGS -stdlib=libc++" 654 LIBS="$LIBS -lc++” I changed lines 637 and 653 of compilers.m4 as you suggested (libc++ instead of libstdc++).My code runs fine (I’m on Mavericks with latests clang). As opposite to the previous build make check now get suck at dual_test. The other tests runs fine. Thanks everybody for help! As Vijay pointed out I thinks this is the way to go since it allows to use c++11. Thanks again.Bests.Lorenzo