Fix building with non-mega CMake

extra/cmake/FindOgg.cmake

@@ -0,0 +1,25 @@
+# Sets the following variables:
+#
+# OGG_FOUND
+# OGG_INCLUDE_DIR
+# OGG_LIBRARY
+
+set(OGG_SEARCH_PATHS
+	/usr/local
+	/usr
+	)
+
+find_path(OGG_INCLUDE_DIR
+	NAMES ogg/ogg.h
+	PATH_SUFFIXES include
+	PATHS ${OGG_SEARCH_PATHS})
+
+find_library(OGG_LIBRARY
+	NAMES ogg
+	PATH_SUFFIXES lib
+	PATHS ${OGG_SEARCH_PATHS})
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Ogg DEFAULT_MSG OGG_LIBRARY OGG_INCLUDE_DIR)
+
+mark_as_advanced(OGG_INCLUDE_DIR OGG_LIBRARY)

extra/cmake/FindOpenAL.cmake

@@ -0,0 +1,28 @@
+# FindOpenAL.cmake that comes with CMake expects "#include <al.h>" to be used
+# However, we use "#include <AL/al.h>"
+
+# Sets the following variables:
+#
+# OPENAL_FOUND
+# OPENAL_INCLUDE_DIR
+# OPENAL_LIBRARY
+
+set(OPENAL_SEARCH_PATHS
+	/usr/local
+	/usr
+	)
+
+find_path(OPENAL_INCLUDE_DIR
+	NAMES AL/al.h
+	PATH_SUFFIXES include
+	PATHS ${OPENAL_SEARCH_PATHS})
+
+find_library(OPENAL_LIBRARY
+	NAMES openal
+	PATH_SUFFIXES lib
+	PATHS ${OPENAL_SEARCH_PATHS})
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(OpenAL DEFAULT_MSG OPENAL_LIBRARY OPENAL_INCLUDE_DIR)
+
+mark_as_advanced(OPENAL_INCLUDE_DIR OPENAL_LIBRARY)