Add CMake option on MSVC- STATIC_CRT

scripts/CMakeLists.txt

@@ -1,6 +1,20 @@
 project(pugixml)
 
 cmake_minimum_required(VERSION 2.6)
+IF (MSVC)
+
+	option(STATIC_CRT "Use static CRT libraries" ON)
+	
+	if(STATIC_CRT)
+		foreach(flag_var
+				CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
+				CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
+			if(${flag_var} MATCHES "/MD")
+				string(REGEX REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}")
+			endif(${flag_var} MATCHES "/MD")
+		endforeach(flag_var)
+	endif()
+ENDIF()
 
 option(BUILD_SHARED_LIBS "Build shared instead of static library" OFF)
 option(BUILD_TESTS "Build tests" OFF)