[cfe-dev] Can't compile simple OpenMP code with clang 5.0.0

Керим Хемраев via cfe-dev cfe-dev at lists.llvm.org
Tue Dec 22 11:57:34 PST 2020

I’m struggling with compiling simple OpenMP program with clang 5.0.0.
Here is the code (foo.cxx):
#include   "omp.h"
#include   <stdio.h>  
int   main ( void ) {
   #pragma   omp   parallel
   printf ( "thread %d \n " ,  omp_get_thread_num ());
As I use clang as part of xeus-cling my clang installation is inside conda packages: 
$  which clang
As this clang package does’t have  omp.h I provide additional directories to find  omp.h  and  libomp.so
To compile the code I use the command:
$ clang -fopenmp -I/home/../usr/lib/llvm-10/include/openmp/ -L/home/../usr/lib/llvm-10/lib foo.cxx
And I get errors:
/usr/bin/ld: cannot find /lib64/libpthread.so.0
/usr/bin/ld: cannot find /usr/lib64/libpthread_nonshared.a
clang-5.0: error: linker command failed with exit code 1 (use -v to see invocation)
I really need some help to undertand how to work with clang 5.0.0 OpenMP
And I think that it is difficult to update clang’s version as xeus-cling requires mentioned 5.0.0 version...
With respect,
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