cmake: force static runtime on Windows

CMakeLists.txt

@@ -38,6 +38,23 @@ if(MSVC) # Windows
 	# std::numeric_limits<...>::max()
 	# (http://stackoverflow.com/questions/1904635/warning-c4003-and-errors-c2589-and-c2059-on-x-stdnumeric-limitsintmax).
 	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /DNOMINMAX")
+
+	# Force static runtime
+	string(REPLACE "/MD" "/MT" CMAKE_CXX_FLAGS_RELEASE ${CMAKE_CXX_FLAGS_RELEASE})
+	string(REPLACE "/MD" "/MT" CMAKE_C_FLAGS_RELEASE ${CMAKE_C_FLAGS_RELEASE})
+	string(REPLACE "/MD" "/MT" CMAKE_CXX_FLAGS_RELWITHDEBINFO ${CMAKE_CXX_FLAGS_RELWITHDEBINFO})
+	string(REPLACE "/MD" "/MT" CMAKE_C_FLAGS_RELWITHDEBINFO ${CMAKE_C_FLAGS_RELWITHDEBINFO})
+	string(REPLACE "/MD" "/MT" CMAKE_CXX_FLAGS_MINSIZEREL ${CMAKE_CXX_FLAGS_MINSIZEREL})
+	string(REPLACE "/MD" "/MT" CMAKE_C_FLAGS_MINSIZEREL ${CMAKE_C_FLAGS_MINSIZEREL})
+	string(REPLACE "/MDd" "/MT" CMAKE_CXX_FLAGS_DEBUG ${CMAKE_CXX_FLAGS_DEBUG})
+	string(REPLACE "/MDd" "/MT" CMAKE_C_FLAGS_DEBUG ${CMAKE_C_FLAGS_DEBUG})
+	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /MT")
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MT")
+	set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /MT")
+	set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} /MT")
+	set(CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL} /MT")
+	set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /MT")
+	set(RETDEC_MSVC_STATIC_RUNTIME ON)
 elseif(UNIX) # Linux or macOS
 	# Common options.
 	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++17")