fortran-specific openMP tests

test cases/fortran/16 openmp/main.f90

@@ -0,0 +1,17 @@
+use, intrinsic :: iso_fortran_env, only: stderr=>error_unit
+use omp_lib, only: omp_get_max_threads
+implicit none
+
+integer :: N, ierr
+character(80) :: buf  ! can't be allocatable in this use case. Just set arbitrarily large.
+
+call get_environment_variable('OMP_NUM_THREADS', buf, status=ierr)
+if (ierr/=0) error stop 'environment variable OMP_NUM_THREADS could not be read'
+read(buf,*) N
+
+if (omp_get_max_threads() /= N) then
+  write(stderr, *) 'Max Fortran threads: ', omp_get_max_threads(), '!=', N
+  error stop
+endif
+
+end program

test cases/fortran/16 openmp/meson.build

@@ -0,0 +1,34 @@
+# This test is complementary to and extends "common/190 openmp" so that
+# we can examine more compilers and options than would be warranted in
+# the common test where C/C++ must also be handled.
+project('openmp', 'fortran',
+  meson_version: '>= 0.46')
+
+
+fc = meson.get_compiler('fortran')
+if fc.get_id() == 'gcc' and fc.version().version_compare('<4.2.0')
+  error('MESON_SKIP_TEST gcc is too old to support OpenMP.')
+endif
+if host_machine.system() == 'darwin'
+  error('MESON_SKIP_TEST macOS does not support OpenMP.')
+endif
+
+openmp = dependency('openmp')
+
+env = environment()
+env.set('OMP_NUM_THREADS', '2')
+
+exef = executable('exef',
+  'main.f90',
+  dependencies : [openmp])
+test('OpenMP Fortran', exef, env : env)
+
+openmp_f = dependency('openmp', language : 'fortran')
+exe_f = executable('exe_f',
+  'main.f90',
+  dependencies : [openmp_f])
+test('OpenMP Fortran-specific', exe_f, env : env)
+
+
+# Check we can apply a version constraint
+dependency('openmp', version: '>=@0@'.format(openmp.version()))