obs-studio/cmake/Modules/FindLibVLC.cmake

# Once done these will be defined:
#
# LIBVLC_FOUND LIBVLC_INCLUDE_DIRS LIBVLC_LIBRARIES
#

find_package(PkgConfig QUIET)
if(PKG_CONFIG_FOUND)
  pkg_check_modules(_VLC QUIET libvlc)
endif()

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

find_path(
  VLC_INCLUDE_DIR
  NAMES libvlc.h
  HINTS ENV VLC_PATH ${VLC_PATH} ${CMAKE_SOURCE_DIR}/${VLC_PATH} ${_VLC_INCLUDE_DIRS}
  PATHS /usr/include /usr/local/include /opt/local/include /sw/include
  PATH_SUFFIXES vlc include/vlc include)

find_library(
  VLC_LIB
  NAMES ${_VLC_LIBRARIES} VLC libVLC
  HINTS ENV VLC_PATH ${VLC_PATH} ${CMAKE_SOURCE_DIR}/${VLC_PATH} ${_VLC_LIBRARY_DIRS}
  PATHS /usr/lib /usr/local/lib /opt/local/lib /sw/lib
  PATH_SUFFIXES
    lib${_lib_suffix}
    lib
    libs${_lib_suffix}
    libs
    bin${_lib_suffix}
    bin
    ../lib${_lib_suffix}
    ../lib
    ../libs${_lib_suffix}
    ../libs
    ../bin${_lib_suffix}
    ../bin)

include(FindPackageHandleStandardArgs)
# OBS doesnt depend on linking, so we dont include VLC_LIB here as required.
find_package_handle_standard_args(LibVLC DEFAULT_MSG VLC_INCLUDE_DIR)
mark_as_advanced(VLC_INCLUDE_DIR VLC_LIB)

if(LIBVLC_FOUND)
  set(LIBVLC_LIBRARIES ${VLC_LIB})
  set(LIBVLC_INCLUDE_DIRS ${VLC_INCLUDE_DIR})

  if(NOT TARGET VLC::LibVLC)
    add_library(VLC::LibVLC INTERFACE IMPORTED)
    set_target_properties(VLC::LibVLC PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${LIBVLC_INCLUDE_DIRS}")
  endif()
endif()