# ~~~
# - Try to find libbpf
#
# Once done this will define
#
#  BPF_FOUND        - System has libbpf
#  BPF_INCLUDE_DIRS - The libbpf include directories
#  BPF_LIBRARIES    - The libraries needed to use libbpf
# ~~~

find_package(PkgConfig QUIET)
pkg_check_modules(PC_LIBBPF libbpf)

find_path(BPF_INCLUDE_DIRS NAMES bpf/bpf.h HINTS ${PC_LIBBPF_INCLUDE_DIRS})

find_library(BPF_LIBRARIES NAMES bpf HINTS ${PC_LIBBPF_LIBRARY_DIRS})

include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(
  BPF
  REQUIRED_VARS BPF_LIBRARIES BPF_INCLUDE_DIRS
  VERSION_VAR BPF_VERSION
  FAIL_MESSAGE "libbpf not found!"
)

if(BPF_FOUND AND NOT TARGET BPF::BPF)
  add_library(BPF::BPF INTERFACE IMPORTED)
  set_target_properties(
    BPF::BPF
    PROPERTIES INTERFACE_LINK_LIBRARIES "${BPF_LIBRARIES}" INTERFACE_INCLUDE_DIRECTORIES "${BPF_INCLUDE_DIRS}"
  )
endif()