working (#423)

CMakeLists.txt

@@ -78,9 +78,6 @@ set(NGRAPH_INSTALL_DOC "${CMAKE_INSTALL_PREFIX}/doc")
 # Compiler-specific logic...
 #-----------------------------------------------------------------------------------------------
 
-# Default values...
-set(NGRAPH_CXX_WARNING_FLAGS "")
-
 # Compiler-specific logic...
 if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "^(Apple)?Clang$")
     message( STATUS "Setting clang flags...")
@@ -107,10 +104,12 @@ endif()
 # GPU support
 #-----------------------------------------------------------------------------------------------
 # Setup CUDA and cuDNN if NGRAPH_GPU_ENABLE=TRUE
-if(NGRAPH_GPU_ENABLE)
-  find_package(CUDA 8 REQUIRED)
+find_package(CUDA 8 QUIET)
+if(CUDA_FOUND AND (NOT DEFINED NGRAPH_GPU_ENABLE OR NGRAPH_GPU_ENABLE))
+    message(STATUS "GPU Backend Enabled")
+    set(NGRAPH_GPU_ENABLE TRUE)
     find_package(CUDNN 5 QUIET REQUIRED)
-  include_directories(${CUDA_INCLUDE_DIRS} ${CUDNN_INCLUDE_DIR} ${LLVM_INCLUDE_DIR})
+    include_directories(SYSTEM ${CUDA_INCLUDE_DIRS} ${CUDNN_INCLUDE_DIR} ${LLVM_INCLUDE_DIR})
     if (CMAKE_C_COMPILER_ID STREQUAL "GNU" AND
         NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 6.0 AND
         CUDA_HOST_COMPILER STREQUAL CMAKE_C_COMPILER)
@@ -119,6 +118,8 @@ if(NGRAPH_GPU_ENABLE)
         "Please select a correct compiler version\n"
         )
     endif()
+elseif(NGRAPH_GPU_ENABLE)
+    message(FATAL_ERROR "GPU was required but CUDA library was not found")
 endif()
 
 #-----------------------------------------------------------------------------------------------

src/ngraph/CMakeLists.txt

@@ -128,14 +128,8 @@ if(NGRAPH_ADDRESS_SANITIZER)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g -fsanitize=address -fno-omit-frame-pointer")
 endif()
 
-include_directories(
-    "${NGRAPH_INCLUDE_PATH}"
-    )
-
-include_directories(
-    SYSTEM
-    "${EIGEN_INCLUDE_DIR}"
-    )
+include_directories("${NGRAPH_INCLUDE_PATH}")
+include_directories(SYSTEM "${EIGEN_INCLUDE_DIR}")
 
 if (NGRAPH_CPU_ENABLE AND LLVM_INCLUDE_DIR AND
     MKLDNN_INCLUDE_DIR)