This is a fast and dirty solution for testing a fix

Signed-off-by: Leonardo Carreras <leonardo.carreras@eonerc.rwth-aachen.de>

Author: leonardocarreras

fpga/gpu/CMakeLists.txt

@@ -6,6 +6,19 @@
 
 add_subdirectory(thirdparty/gdrcopy)
 
+# Patch gdrcopy wrong source file treatment
+if (TARGET basic)
+    set_source_files_properties(${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/gdrcopy/basic.cpp PROPERTIES LANGUAGE CXX)
+endif()
+
+if (TARGET validate)
+    set_source_files_properties(${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/gdrcopy/validate.cpp PROPERTIES LANGUAGE CXX)
+endif()
+
+if (TARGET copybw)
+    set_source_files_properties(${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/gdrcopy/copybw.cpp PROPERTIES LANGUAGE CXX)
+endif()
+
 add_library(villas-gpu
     SHARED
         src/gpu.cpp