vgmstream/cmake/FindVorbis.cmake

# - Find vorbisenc
# Find the native vorbisenc includes and libraries
#
#  VORBIS_INCLUDE_DIRS - where to find vorbis.h, etc.
#  VORBIS_LIBRARIES    - List of libraries when using vorbis.
#  VORBIS_FOUND        - True if vorbis found.

# Comes from https://github.com/erikd/libsndfile/blob/master/cmake/FindVorbis.cmake

if(VORBIS_INCLUDE_DIR)
	# Already in cache, be silent
	set(VORBIS_FIND_QUIETLY TRUE)
endif()

find_package(Ogg QUIET)

find_package(PkgConfig QUIET)
pkg_check_modules(PC_VORBIS QUIET vorbis)

set(VORBIS_VERSION ${PC_VORBIS_VERSION})

find_path(VORBIS_INCLUDE_DIR vorbis/codec.h
	HINTS
		${PC_VORBIS_INCLUDEDIR}
		${PC_VORBIS_INCLUDE_DIRS}
		${VORBIS_ROOT}
	)

find_library(VORBIS_LIBRARY
	NAMES
		vorbis
		vorbis_static
		libvorbis
		libvorbis_static
	HINTS
		${PC_VORBIS_LIBDIR}
		${PC_VORBIS_LIBRARY_DIRS}
		${VORBIS_ROOT}
	)

# Handle the QUIETLY and REQUIRED arguments and set VORBIS_FOUND
# to TRUE if all listed variables are TRUE.
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(Vorbis
	REQUIRED_VARS
		VORBIS_LIBRARY
		VORBIS_INCLUDE_DIR
		OGG_FOUND
	VERSION_VAR
		VORBIS_VERSION
	)

if(VORBIS_FOUND)
	set(VORBIS_INCLUDE_DIRS ${VORBIS_INCLUDE_DIR})
	set(VORBIS_LIBRARIES ${VORBIS_LIBRARY} ${OGG_LIBRARIES})
	if(NOT TARGET Vorbis::Vorbis)
		add_library(Vorbis::Vorbis UNKNOWN IMPORTED)
		set_target_properties(Vorbis::Vorbis PROPERTIES
			INTERFACE_INCLUDE_DIRECTORIES "${VORBIS_INCLUDE_DIR}"
			IMPORTED_LOCATION "${VORBIS_LIBRARY}"
			INTERFACE_LINK_LIBRARIES Ogg::Ogg
		)
	endif()
endif()

mark_as_advanced(VORBIS_INCLUDE_DIR VORBIS_LIBRARY)