obs-studio/cmake/Modules/FindFreetype.cmake

# Once done these will be defined:
#
#  FREETYPE_FOUND
#  FREETYPE_INCLUDE_DIRS
#  FREETYPE_LIBRARIES
#

if(FREETYPE_INCLUDE_DIRS AND FREETYPE_LIBRARIES)
	set(FREETYPE_FOUND TRUE)
else()
	find_package(PkgConfig QUIET)
	if (PKG_CONFIG_FOUND)
		pkg_check_modules(_FREETYPE QUIET freetype2)
	endif()

	if(CMAKE_SIZEOF_VOID_P EQUAL 8)
		set(_lib_suffix 64)
	else()
		set(_lib_suffix 32)
	endif()

	find_path(FREETYPE_INCLUDE_DIR_ft2build
		NAMES
			ft2build.h
		HINTS
			${_FREETYPE_INCLUDE_DIRS}
			"${CMAKE_SOURCE_DIR}/additional_install_files/include"
			"$ENV{obsAdditionalInstallFiles}/include"
			ENV FreetypePath${_lib_suffix}
			ENV FreetypePath
			ENV FREETYPE_DIR
		PATHS
			/usr/include /usr/local/include /opt/local/include /sw/include
		PATH_SUFFIXES
			include/freetype2 include)

	find_path(FREETYPE_INCLUDE_DIR_freetype2
		NAMES
			freetype/config/ftheader.h
			config/ftheader.h
		HINTS
			${_FREETYPE_INCLUDE_DIRS}
			"${CMAKE_SOURCE_DIR}/additional_install_files/include"
			"$ENV{obsAdditionalInstallFiles}/include"
			ENV FreetypePath${_lib_suffix}
			ENV FreetypePath
			ENV FREETYPE_DIR
		PATHS
			/usr/include /usr/local/include /opt/local/include /sw/include
		PATH_SUFFIXES
			include/freetype2 include)

	find_library(FREETYPE_LIB
		NAMES ${_FREETYPE_LIBRARIES} freetype libfreetype
		HINTS
			${_FREETYPE_LIBRARY_DIRS}
			"${FREETYPE_INCLUDE_DIR_ft2build}/../lib"
			"${FREETYPE_INCLUDE_DIR_ft2build}/../lib${_lib_suffix}"
			"${FREETYPE_INCLUDE_DIR_ft2build}/../libs${_lib_suffix}"
			"${FREETYPE_INCLUDE_DIR_ft2build}/lib"
			"${FREETYPE_INCLUDE_DIR_ft2build}/lib${_lib_suffix}"
			ENV FREETYPE_DIR
		PATHS
			/usr/lib /usr/local/lib /opt/local/lib /sw/lib
		PATH_SUFFIXES
			lib${_lib_suffix} lib)

	if(FREETYPE_INCLUDE_DIR_ft2build AND FREETYPE_INCLUDE_DIR_freetype2)
		set(FREETYPE_INCLUDE_DIR "${FREETYPE_INCLUDE_DIR_ft2build};${FREETYPE_INCLUDE_DIR_freetype2}")
		list(REMOVE_DUPLICATES FREETYPE_INCLUDE_DIR)
	else()
		unset(FREETYPE_INCLUDE_DIR)
	endif()

	set(FREETYPE_INCLUDE_DIRS ${FREETYPE_INCLUDE_DIR} CACHE PATH "freetype include dirs")
	set(FREETYPE_LIBRARIES ${FREETYPE_LIB} CACHE STRING "freetype libraries")

	include(FindPackageHandleStandardArgs)
	find_package_handle_standard_args(Freetype DEFAULT_MSG FREETYPE_LIB FREETYPE_INCLUDE_DIR_ft2build FREETYPE_INCLUDE_DIR_freetype2)
	mark_as_advanced(FREETYPE_INCLUDE_DIR FREETYPE_INCLUDE_DIR_ft2build FREETYPE_INCLUDE_DIR_freetype2 FREETYPE_LIB)
endif()