#========================================================================================
# FindDebuginfod
# -----------
#
# Find debuginfod library and headers
#
# The module defines the following variables:
#
# This module reads hints about search locations from variables::
#
#       LibDebuginfod_ROOT_DIR         - Base directory the of libdebuginfod installation
#       LibDebuginfod_INCLUDEDIR       - Hint directory that contains the libdebuginfod headers files
#       LibDebuginfod_LIBRARYDIR       - Hint directory that contains the libdebuginfod library files
#
# and saves search results persistently in CMake cache entries::
#
#       LibDebuginfod_FOUND            - True if headers and requested libraries were found
#       LibDebuginfod_INCLUDE_DIRS     - libdebuginfod include directories
#       LibDebuginfod_LIBRARY_DIRS     - Link directories for libdebuginfod libraries
#       LibDebuginfod_LIBRARIES        - libdebuginfod library files
#
# Utilize package config (e.g. /usr/lib64/pkgconfig/libdebuginfod.pc) to fetch
# version information.
#
#========================================================================================

find_package(PkgConfig QUIET)
pkg_check_modules(PC_Debuginfod QUIET REQUIRED libdebuginfod>=${ElfUtils_MIN_VERSION})
set(LibDebuginfod_VERSION "${PC_Debuginfod_VERSION}")

find_path(LibDebuginfod_INCLUDE_DIRS
          NAMES
            debuginfod.h
          HINTS
            ${PC_Debuginfod_INCLUDEDIR}
            ${PC_Debuginfod_INCLUDE_DIRS}
            ${LibDebuginfod_ROOT_DIR}/include
            ${LibDebuginfod_ROOT_DIR}
            ${LibDebuginfod_INCLUDEDIR}
          PATHS
            ${DYNINST_SYSTEM_INCLUDE_PATHS}
          PATH_SUFFIXES
            ${_path_suffixes}
          DOC
            "libdebuginfod include directories")

find_library(LibDebuginfod_LIBRARIES
             NAMES
               libdebuginfod.so.1 libdebuginfod.so
             HINTS
               ${PC_Debuginfod_LIBDIR}
               ${PC_Debuginfod_LIBRARY_DIRS}
               ${LibDebuginfod_ROOT_DIR}/lib
               ${LibDebuginfod_ROOT_DIR}
               ${LibDebuginfod_LIBRARYDIR}
             PATHS
               ${DYNINST_SYSTEM_LIBRARY_PATHS}
             PATH_SUFFIXES
               ${_path_suffixes})

include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(LibDebuginfod
                                  FOUND_VAR
                                    LibDebuginfod_FOUND
                                  REQUIRED_VARS
                                    LibDebuginfod_INCLUDE_DIRS
                                    LibDebuginfod_LIBRARIES
                                  VERSION_VAR
                                    LibDebuginfod_VERSION)

if(LibDebuginfod_FOUND)
  set(LibDebuginfod_INCLUDE_DIRS ${LibDebuginfod_INCLUDE_DIRS})
  set(LibDebuginfod_LIBRARIES ${LibDebuginfod_LIBRARIES})
  get_filename_component(_debuginfod_dir ${LibDebuginfod_LIBRARIES} DIRECTORY)
  set(LibDebuginfod_LIBRARY_DIRS ${_debuginfod_dir} "${_debuginfod_dir}/elfutils")
endif()