Source/cmake/FindLibDRM.cmake

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#[=======================================================================[.rst:
FindLibDRM
----------

Find libdrm headers and libraries.

Imported Targets
^^^^^^^^^^^^^^^^

``LibDRM::LibDRM``
  The libdrm library, if found.

Result Variables
^^^^^^^^^^^^^^^^

This will define the following variables in your project:

``LibDRM_FOUND``
  true if (the requested version of) libdrm is available.
``LibDRM_VERSION``
  the libdrm version.
``LibDRM_LIBRARIES``
  the libraries to link against to use libdrm.
``LibDRM_INCLUDE_DIRS``
  where to find the libdrm headers.
``LibDRM_COMPILE_OPTIONS``
  this should be passed to target_compile_options(), if the
  target is not used for linking

#]=======================================================================]

find_package(PkgConfig QUIET)
pkg_check_modules(PC_LIBDRM QUIET libdrm)
set(LibDRM_COMPILE_OPTIONS ${PC_LIBDRM_COMPILE_OPTIONS})
set(LibDRM_VERSION ${PC_LIBDRM_VERSION})

find_path(LibDRM_INCLUDE_DIR
    NAMES drm.h
    HINTS ${PC_LIBDRM_INCLUDEDIR}
          ${PC_LIBDRM_INCLUDE_DIRS}
    PATH_SUFFIXES libdrm
)

find_library(LibDRM_LIBRARY
    NAMES drm
    HINTS ${PC_LIBDRM_LIBDIR}
          ${PC_LIBDRM_LIBRARY_DIRS}
)

include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(LibDRM
    FOUND_VAR LibDRM_FOUND
    REQUIRED_VARS LibDRM_INCLUDE_DIR LibDRM_LIBRARY
    VERSION_VAR LibDRM_VERSION
)

if (LibDRM_LIBRARY AND NOT TARGET LibDRM::LibDRM)
    add_library(LibDRM::LibDRM UNKNOWN IMPORTED GLOBAL)
    set_target_properties(LibDRM::LibDRM PROPERTIES
        IMPORTED_LOCATION "${LibDRM_LIBRARY}"
        INTERFACE_COMPILE_OPTIONS "${LibDRM_COMPILE_OPTIONS}"
        INTERFACE_INCLUDE_DIRECTORIES "${LibDRM_INCLUDE_DIR}"
    )
endif ()

mark_as_advanced(
    LibDRM_INCLUDE_DIR
    LibDRM_LIBRARY
)

if (LibDRM_FOUND)
    set(LibDRM_LIBRARIES ${LibDRM_LIBRARY})
    set(LibDRM_INCLUDE_DIRS ${LibDRM_INCLUDE_DIR})
endif ()