Greetings, so I tried to use opennp with one of the latest version of clang, clang version 3.4.2 (tags/RELEASE_34/dot2-final). Followed the procedure to compilre and export the library PATHs, Compiling my hello.c using : clang -fopenmp hello.c and then running it, still it can't use more than 1 thread: Bash-4.1$ ./a.out Hello from thread 0, nthreads 1 I tried to manually export export OMP_NUM_THREADS=8 but that didn't solve anything as well. Any suggestions would be appreciated. -Amir p.sl: This is the hello.c: #include <omp.h>#include <stdio.h>int main() {#pragma omp parallel printf("Hello from thread %d, nthreads %d\n", omp_get_thread_num(), omp_get_num_threads -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20141107/2e16409a/attachment.html>