Define the implementaiton strings in each implementation header

CMakeLists.txt

@@ -8,10 +8,10 @@ set(gpu-stream_VERSION_MINOR 0)
 
 list(APPEND CMAKE_CXX_FLAGS --std=c++11)
 
+configure_file(src/common.h.in src/common.h)
+
 find_package(CUDA QUIET)
 if (${CUDA_FOUND})
-set(IMPLEMENTATION CUDA)
-configure_file(src/common.h.in src/common_cuda.h)
   cuda_add_executable(cuda.exe src/main.cpp src/CUDAStream.cu)
   target_compile_definitions(cuda.exe PUBLIC CUDA)
 else (${CUDA_FOUND})
@@ -20,8 +20,6 @@ endif (${CUDA_FOUND})
 
 find_package(OpenCL QUIET)
 if (${OpenCL_FOUND})
-set(gpu-stream_IMPLEMENTATION OpenCL)
-configure_file(src/common.h.in src/common_ocl.h)
   add_executable(ocl.exe src/main.cpp src/OCLStream.cpp)
   target_compile_definitions(ocl.exe PUBLIC OCL)
   target_link_libraries(ocl.exe ${OpenCL_LIBRARY})

src/CUDAStream.h

@@ -4,6 +4,8 @@
 
 #include "Stream.h"
 
+#define IMPLEMENTATION_STRING "CUDA"
+
 template <class T>
 class CUDAStream : public Stream<T>
 {

src/OCLStream.h

@@ -10,6 +10,8 @@
 
 #include "Stream.h"
 
+#define IMPLEMENTATION_STRING "OpenCL"
+
 template <class T>
 class OCLStream : public Stream<T>
 {

src/common.h.in

@@ -1,4 +1,3 @@
 
 #define VERSION_STRING "@gpu-stream_VERSION_MAJOR@.@gpu-stream_VERSION_MINOR@"
-#define IMPLEMENTATION_STRING "@gpu-stream_IMPLEMENTATION@"