From 204b4dc31f7170a6c954e22ceb542f51a7dd378e Mon Sep 17 00:00:00 2001
From: Michael Kuron <mkuron@icp.uni-stuttgart.de>
Date: Thu, 18 Jun 2020 18:17:52 +0200
Subject: [PATCH] FFT: show error when using with MPI_COMM_WORLD
---
src/fft/Fft.cpp | 1 +
1 file changed, 1 insertion(+)
diff --git a/src/fft/Fft.cpp b/src/fft/Fft.cpp
index 65db93e51..154cfff51 100644
--- 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
--
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