Default to linking with /MT instead of /MD for VS.

CMake/CMakeMacros.cmake

@@ -82,3 +82,31 @@ macro(check_compile_features BIN_DIR SOURCE_FILE GREETER GREET_SUCCESS GREET_FAI
   endif()
 endmacro()
 
+# Borrowed from http://stackoverflow.com/q/10113017
+macro(configure_msvc_runtime)
+  if(MSVC)
+    # Get the compiler options generally used.
+    list(APPEND COMPILER_VARIABLES
+      CMAKE_C_FLAGS_DEBUG
+      CMAKE_C_FLAGS_MINSIZEREL
+      CMAKE_C_FLAGS_RELEASE
+      CMAKE_C_FLAGS_RELWITHDEBINFO
+      CMAKE_CXX_FLAGS_DEBUG
+      CMAKE_CXX_FLAGS_MINSIZEREL
+      CMAKE_CXX_FLAGS_RELEASE
+      CMAKE_CXX_FLAGS_RELWITHDEBINFO
+    )
+    if (WITH_STATIC_LINKING)
+      set(TO_REPLACE "/MD")
+      set(REPLACE_WITH "/MT")
+    else()
+      set(TO_REPLACE "/MT")
+      set(REPLACE_WITH "/MD")
+    endif()
+    foreach(COMPILER_VARIABLE ${COMPILER_VARIABLES})
+      if (${COMPILER_VARIABLE} MATCHES "${TO_REPLACE}")
+        string(REGEX REPLACE "${TO_REPLACE}" "${REPLACE_WITH}" ${COMPILER_VARIABLE} "${${COMPILER_VARIABLE}}")
+      endif()
+    endforeach()
+  endif()
+endmacro()

CMake/DefineOptions.cmake

@@ -46,6 +46,8 @@ if(NOT MSVC)
 else()
   # Turn this option on to enable using the Texture Font Generator.
   option(WITH_TEXTURE_GENERATOR "Build with the Texture Font Generator. Ensure the MFC library is installed." OFF)
+  # Turn this option off to use dynamic linking instead of static linking.
+  option(WITH_STATIC_LINKING "Build StepMania with static linking." ON)
 endif()
 
 if(WIN32)

StepmaniaCore.cmake

@@ -45,6 +45,9 @@ include("${SM_CMAKE_DIR}/SMDefs.cmake")
 # Put the predefined targets in separate groups.
 set_property(GLOBAL PROPERTY USE_FOLDERS ON)
 
+# Set up the linker flags for MSVC builds.
+configure_msvc_runtime()
+
 # Checks the standard include directories for c-style headers.
 # We may use C++ in this project, but the check works better with plain C headers.
 include(CheckIncludeFiles)