Building `stdlib` with openmp

Help stdlib
1

I’m testing whether it is possible to build stdlib in a package that also requires OpenMP (e.g. via -fopenmp if gfortran).

I get some nontrivial errors with some of the tests in the test-drive:

<ERROR> Execution for object " test_string_intrinsic " returned exit code  1
<ERROR> Execution for object " test_sorting " returned exit code  6
<ERROR> Execution for object " test_open " returned exit code  2
<ERROR>*cmd_run*:stopping due to failed executions
STOP 1

Since stdlib does not have any openmp pragmas, shouldn’t we expect the results to be identical? I’ve tested using -frecursive to require all recursive subroutines, but that did not help.

2

Unless some routines are not thread-safe and called from parallel regions.

3

I believe some may be using internal I/O, that may be the reason?
But, if there are no parallel regions at all in the program, shouldn’t it just ignore the openmp settings?

4

Do you mean that the calling program does not contain any OpenMP directive either? In that case yes, you should get the same results by compiling with or without -fopenmp

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