Make MSVC static linkage optional

CMakeLists.txt

@@ -279,7 +279,7 @@ endif()
 
 if (MSVC)
 	if (STATIC)
-		message(WARNING "Static builds are not available for MSVC")
+		message(STATUS "MSVC static builds only embed the C runtime library: SDL2 and FreeType are still dynamically linked")
 	endif()
 
 	# Find dependencies
@@ -296,6 +296,7 @@ if (MSVC)
 		set(FREETYPE_LIBRARIES "${CMAKE_CURRENT_SOURCE_DIR}/msvc/freetype/win32/freetype.lib")
 	endif()
 
+	if(STATIC)
 		# Static-link the CRT, so we don't need to lug around 10 different DLLs
 		foreach(FLAG_VAR
 				CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
@@ -304,6 +305,7 @@ if (MSVC)
 				string(REGEX REPLACE "/MD" "/MT" ${FLAG_VAR} "${${FLAG_VAR}}")
 			endif()
 		endforeach()
+	endif()
 
 	# Work around MSVC2003's lack of stdint.h
 	include(CheckIncludeFiles)