scalapack: run without mpiexec

Normally MPI programs would be run with MPI exec, but Travis-CI
has errors wanting --allow-run-as-root. To simplify, we don't use
mpiexec in this test, since it's a library check, not an MPI stack check.

test cases/frameworks/30 scalapack/main.f90

@@ -22,4 +22,4 @@ if(myrow == mycol) print '(A, F10.6)', "OK: Scalapack Fortran  eps=", eps
 call blacs_gridexit(ictxt)
 call blacs_exit(0)
 
-end program
+end program

test cases/frameworks/30 scalapack/meson.build

@@ -1,31 +1,19 @@
 project('test scalapack', 'c')
 
-cc = meson.get_compiler('c')
-
-mpiexec = find_program('mpiexec', required: false)
-if not mpiexec.found()
-  error('MESON_SKIP_TEST: mpiexec not found')
-endif
-
 mpi_c = dependency('mpi', language: 'c', required: false)
 if not mpi_c.found()
   error('MESON_SKIP_TEST: MPI library not available')
 endif
 
-# examples can run with any number of MPI images.
-mpi_args = ['-np', '1']
 
 scalapack = dependency('scalapack', required: false)
 if not scalapack.found()
   error('MESON_SKIP_TEST: scalapack library not available')
 endif
 
-# https://software.intel.com/en-us/mkl-developer-reference-c-scalapack-routines
 c_exe = executable('scalapack_c', 'main.c',
   dependencies: [scalapack, mpi_c])
-test('scalapack_c', mpiexec,
-  args: [mpi_args, c_exe],
-  timeout: 30)
+test('scalapack_c', c_exe, timeout: 30)
 
 if add_languages('fortran')
   mpi_f = dependency('mpi', language: 'fortran', required: false)
@@ -33,10 +21,7 @@ if add_languages('fortran')
     error('MESON_SKIP_TEST: MPI Fortran library not available')
   endif
 
-  # https://software.intel.com/en-us/mkl-developer-reference-fortran-scalapack-routines
   f_exe = executable('scalapack_fortran', 'main.f90',
     dependencies: [scalapack, mpi_f])
-  test('scalapack_fortran', mpiexec,
-    args: [mpi_args, f_exe],
-    timeout: 30)
-endif
+  test('scalapack_fortran', f_exe, timeout: 30)
+endif