restructured build system support

cmake/BuildType.cmake

@@ -0,0 +1,45 @@
+function(set_build_type)
+
+message(STATUS "Used build generator: ${CMAKE_GENERATOR}")
+
+# Set a default build type if none was specified
+set(DEFAULT_BUILD_TYPE "RelWithDebInfo")
+if(EXISTS "${CMAKE_SOURCE_DIR}/.git")
+	set(DEFAULT_BUILD_TYPE "Debug")
+endif()
+
+if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+	message(STATUS 
+		"Setting build type to '${DEFAULT_BUILD_TYPE}' as none was specified."
+	)
+	set(CMAKE_BUILD_TYPE "${DEFAULT_BUILD_TYPE}" CACHE
+		STRING "Choose the type of build." FORCE
+	)
+	# Set the possible values of build type for cmake-gui
+	set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS
+		"Debug" "Release" "MinSizeRel" "RelWithDebInfo"
+	)
+endif()
+
+if(${CMAKE_BUILD_TYPE} MATCHES "Debug")
+	message(STATUS 
+		"Building Debug application with flags: ${CMAKE_C_FLAGS_DEBUG}"
+	)
+elseif(${CMAKE_BUILD_TYPE} MATCHES "RelWithDebInfo")
+	message(STATUS 
+		"Building Release (Debug) application with "
+		"flags: ${CMAKE_C_FLAGS_RELWITHDEBINFO}"
+	)
+elseif(${CMAKE_BUILD_TYPE} MATCHES "MinSizeRel")
+	message(STATUS 
+		"Building Release (Size) application with "
+		"flags: ${CMAKE_C_FLAGS_MINSIZEREL}"
+	)
+else()
+	message(STATUS 
+		"Building Release (Speed) application with "
+		"flags: ${CMAKE_C_FLAGS_RELEASE}"
+	)
+endif()
+
+endfunction()