Pass compiler onto YAML

CMakeLists.txt

 	UPDATE_COMMAND ""
 	PATCH_COMMAND ""
     PREFIX ${CMAKE_CURRENT_BINARY_DIR}/external/yaml-cpp
-    CMAKE_ARGS -DCMAKE_INSTALL_PREFIX:PATH=${CMAKE_INSTALL_PREFIX} -DBUILD_SHARED_LIBS=ON -DBUILD_SHARED_LIBS=${BUILD_SHARED_LIBS}
+    CMAKE_ARGS -DCMAKE_INSTALL_PREFIX:PATH=${CMAKE_INSTALL_PREFIX} -DBUILD_SHARED_LIBS=ON -DBUILD_SHARED_LIBS=${BUILD_SHARED_LIBS} /
+		-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
 )
 add_compile_options(-DHAVE_YAMLCPP)