Extract cmake logic to it's own file

CMakeLists.txt

@@ -127,40 +127,8 @@ if(NOT QT_MKSPEC MATCHES "winrt")
 	)
 endif()
 
-if(${CMAKE_BUILD_TYPE} MATCHES "Debug")
-	include(CTest)
-	enable_testing()
-	add_definitions(-DUNITTEST_BUILD)
-endif()
-
-if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
-	# clang and AppleClang
-	add_compile_options(
-		-Wall
-		-Wextra
-
-		-Wno-address-of-packed-member # ignore for mavlink
-	)
-
-elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
-	# GCC
-	if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 4.9)
-		add_compile_options(-fdiagnostics-color=always)
-	endif()
-
-	add_compile_options(
-		-Wall
-		-Wextra
-	)
-	
-elseif (WIN32)
-
-	add_definitions(-D_USE_MATH_DEFINES)
-	add_compile_options(
-		/wd4244 # warning C4244: '=': conversion from 'double' to 'float', possible loss of data
-		)
-
-endif()
+# Sets the default flags for compilation and linking.
+include(CompileOptions)
 
 # TODO: get qtquick compiler working
 #qtquick_compiler_add_resources(QGC_RESOURCES ${QGC_RESOURCES}

cmake/CompileOptions.cmake

+
+if(${CMAKE_BUILD_TYPE} MATCHES "Debug")
+	include(CTest)
+	enable_testing()
+	add_definitions(-DUNITTEST_BUILD)
+endif()
+
+if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+	# clang and AppleClang
+	add_compile_options(
+		-Wall
+		-Wextra
+		-Wno-address-of-packed-member # ignore for mavlink
+	)
+elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+	# GCC
+	if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 4.9)
+		add_compile_options(-fdiagnostics-color=always)
+	endif()
+
+	add_compile_options(
+		-Wall
+		-Wextra
+	)
+elseif (WIN32)
+	add_definitions(-D_USE_MATH_DEFINES)
+	add_compile_options(
+		/wd4244 # warning C4244: '=': conversion from 'double' to 'float', possible loss of data
+    )
+endif()