Hello, I'm trying to use MPICH 3.1.4 with Clang and tried Clang 3.6.1 and 3.7. With both versions Clang segfaults at the same point: pt2pt/greq_start.c:239:62: error: alias must point to a defined variable or function MPIX_Grequest_class *greq_class) __attribute__((weak,alias("MPIX_Grequest_class_create"))); I've filed a LLVM bug [1] with more details, however without response yet. MPICH was configured with: CC=clang CXX=clang++ /opt/toolchains/src/mpi/mpich/3.1.4/configure -- srcdir=/opt/toolchains/src/mpi/mpich/3.1.4 -- prefix=/opt/toolchains/clang/3.7/libraries/mpi/mpich/3.1.4 --enable-g=most -- enable-fast=all --enable-fortran=all --enable-cxx Is this a known MPICH problem or am I doing something wrong? Kind regards, Torbjörn [1]: https://llvm.org/bugs/show_bug.cgi?id=24455 _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss