move to new build system

cmake/libraries/vorbis.cmake

@@ -0,0 +1,33 @@
+if(PROJECT_ENABLE_VORBIS)
+  if(PROJECT_BUILD)
+    find_package(Vorbis ${VORBIS_VERSION} REQUIRED)
+
+    add_definitions(-DPROJECT_ENABLE_VORBIS)
+
+    include_directories(BEFORE SYSTEM
+      ${VORBIS_INCLUDE_DIRS}
+    )
+
+    link_libraries(
+      Vorbis::vorbis
+    )
+  elseif(NOT PROJECT_IS_MINGW OR CMAKE_HOST_WIN32)
+    ExternalProject_Add(vorbis_project
+      PREFIX external
+      URL ${PROJECT_3RD_PARTY_DIR}/vorbis-v${VORBIS_VERSION}.tar.gz
+      URL_HASH SHA256=270c76933d0934e42c5ee0a54a36280e2d87af1de3cc3e584806357e237afd13
+      PATCH_COMMAND ${PROJECT_3RD_PARTY_DIR}/vorbis_patch.sh ${PROJECT_3RD_PARTY_DIR} ${CMAKE_BINARY_DIR}/external/src/vorbis_project
+      LIST_SEPARATOR |
+      CMAKE_ARGS ${PROJECT_EXTERNAL_CMAKE_FLAGS}
+        -DBUILD_SHARED_LIBS=${PROJECT_BUILD_SHARED_LIBS}
+        -DBUILD_STATIC_LIBS=ON
+    )
+
+    set(PROJECT_DEPENDENCIES 
+      ${PROJECT_DEPENDENCIES}
+      vorbis_project
+    )
+
+    add_dependencies(vorbis_project ogg_project)
+  endif()
+endif()