Add Wii CMake (#26)

platforms/NintendoWii.cmake

@@ -0,0 +1,57 @@
+find_package(PkgConfig REQUIRED)
+
+add_executable(RetroEngine ${RETRO_FILES})
+
+set(RETRO_SUBSYSTEM "GX" CACHE STRING "The subsystem to use")
+if(NOT (RETRO_SUBSYSTEM STREQUAL "GX"))
+    message(FATAL_ERROR "RETRO_SUBSYSTEM must be set to GX")
+endif()
+if(NOT GAME_STATIC) 
+    message(FATAL_ERROR "GAME_STATIC must be on")
+endif()
+
+# pkg_check_modules(OGG ogg)
+# 
+# if(NOT OGG_FOUND)
+#     set(COMPILE_OGG TRUE)
+#     message(NOTICE "libogg not found, attempting to build from source")
+# else()
+#     message("found libogg")
+#     target_link_libraries(RetroEngine ${OGG_STATIC_LIBRARIES})
+#     target_link_options(RetroEngine PRIVATE ${OGG_STATIC_LDLIBS_OTHER})
+#     target_compile_options(RetroEngine PRIVATE ${OGG_STATIC_CFLAGS})
+# endif()
+# 
+# pkg_check_modules(THEORA theora theoradec)
+# 
+# if(NOT THEORA_FOUND)
+#     message("could not find libtheora, attempting to build manually")
+#     set(COMPILE_THEORA TRUE)
+# else()
+#     message("found libtheora")
+#     target_link_libraries(RetroEngine ${THEORA_STATIC_LIBRARIES})
+#     target_link_options(RetroEngine PRIVATE ${THEORA_STATIC_LDLIBS_OTHER})
+#     target_compile_options(RetroEngine PRIVATE ${THEORA_STATIC_CFLAGS})
+# endif()
+
+set(SHARED_COMPILE
+    $<$<COMPILE_LANGUAGE:CXX>:-fno-rtti -fno-threadsafe-statics> 
+    -Os -fomit-frame-pointer -ffunction-sections -fdata-sections -fno-asynchronous-unwind-tables -fmerge-all-constants
+)
+
+set (SHARED_LINK
+    -Wl,-gc-sections -Wl,--strip-all -Wl,--orphan-handling=discard -Wl,-Map,.map
+)
+
+target_compile_options(RetroEngine PRIVATE ${SHARED_COMPILE})
+target_compile_definitions(RetroEngine PRIVATE BASE_PATH="/RSDKv5/" RETRO_DISABLE_LOG=1)
+target_link_options(RetroEngine PRIVATE ${SHARED_LINK})
+target_link_libraries(RetroEngine fat aesnd)
+
+target_compile_options(${GAME_NAME} PRIVATE ${SHARED_COMPILE})
+target_compile_definitions(${GAME_NAME} PRIVATE RETRO_INCLUDE_EDITOR=0)
+target_link_options(${GAME_NAME} PRIVATE ${SHARED_LINK})
+
+set(PLATFORM Wii)
+
+ogc_create_dol(RetroEngine)