From acb1b1542acf6f2851661d396e71357a74217e83 Mon Sep 17 00:00:00 2001
From: Andreas Suter <andreas.suter@psi.ch>
Date: Tue, 12 Jan 2021 14:37:00 +0100
Subject: [PATCH] make sure that CUDA is present before pushing CUDA specific
 compiler flags.

---
 src/classes/CMakeLists.txt | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/classes/CMakeLists.txt b/src/classes/CMakeLists.txt
index 69fbb06e..60f7b06b 100644
--- a/src/classes/CMakeLists.txt
+++ b/src/classes/CMakeLists.txt
@@ -140,8 +140,10 @@ endif (OpenMP_FOUND)
 
 #--- add DKS compiler flags if enabled ----------------------------------------
 if (DKS_FOUND)
-  set(DKS_CXX_FLAGS -DDKS_OPENCL -DDKS_CUDA  -I${CUDA_INCLUDE_DIRS} -I${DKS_INCLUDE_DIR}) 
-  target_compile_options(PMusr PUBLIC ${DKS_CXX_FLAGS})
+  if (CUDA_FOUND)
+    set(DKS_CXX_FLAGS -DDKS_OPENCL -DDKS_CUDA  -I${CUDA_INCLUDE_DIRS} -I${DKS_INCLUDE_DIR}) 
+    target_compile_options(PMusr PUBLIC ${DKS_CXX_FLAGS})
+  endif (CUDA_FOUND)
 endif (DKS_FOUND)
 
 #--- add library dependencies -------------------------------------------------