FFT: show error when using with MPI_COMM_WORLD

204b4dc3 · Michael Kuron · ff3b369b · 204b4dc3
Commit 204b4dc3 authored 4 years ago by Michael Kuron
--- a/src/fft/Fft.cpp
+++ b/src/fft/Fft.cpp
@@ -11,6 +11,7 @@ FourierTransform<Field_T>::FourierTransform( shared_ptr< StructuredBlockForest >
 : blocks_(blocks), fieldId_(fieldId), greens_()
 {
 #ifdef WALBERLA_USE_PFFT
+   WALBERLA_CHECK_UNEQUAL(MPIManager::instance()->comm(), MPI_COMM_WORLD, "PFFT does not support MPI_COMM_WORLD");
   pfft_init();
 #else
 #ifdef WALBERLA_BUILD_WITH_MPI