# Try to find the Gloo library and headers.
#  Gloo_FOUND        - system has Gloo lib
#  Gloo_INCLUDE_DIRS - the Gloo include directory
#  Gloo_LIBRARY/Gloo_NATIVE_LIBRARY    - libraries needed to use Gloo

find_path(Gloo_INCLUDE_DIR
  NAMES gloo/common/common.h
  DOC "The directory where Gloo includes reside"
)

find_library(Gloo_NATIVE_LIBRARY
  NAMES gloo
  DOC "The Gloo library (without CUDA)"
)

find_library(Gloo_CUDA_LIBRARY
  NAMES gloo_cuda
  DOC "The Gloo library (with CUDA)"
)

set(Gloo_INCLUDE_DIRS ${Gloo_INCLUDE_DIR})

# use the CUDA library depending on the Gloo_USE_CUDA variable
if (DEFINED Gloo_USE_CUDA)
  if (${Gloo_USE_CUDA})
    set(Gloo_LIBRARY ${Gloo_CUDA_LIBRARY})
    set(Gloo_NATIVE_LIBRARY ${Gloo_NATIVE_LIBRARY})
  else()
    set(Gloo_LIBRARY ${Gloo_NATIVE_LIBRARY})
    set(Gloo_NATIVE_LIBRARY ${Gloo_NATIVE_LIBRARY})
  endif()
else()
  # else try to use the CUDA library if found
  if (${Gloo_CUDA_LIBRARY} STREQUAL "Gloo_CUDA_LIBRARY-NOTFOUND")
    set(Gloo_LIBRARY ${Gloo_NATIVE_LIBRARY})
    set(Gloo_NATIVE_LIBRARY ${Gloo_NATIVE_LIBRARY})
  else()
    set(Gloo_LIBRARY ${Gloo_CUDA_LIBRARY})
    set(Gloo_NATIVE_LIBRARY ${Gloo_NATIVE_LIBRARY})
  endif()
endif()

include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(Gloo
  FOUND_VAR Gloo_FOUND
  REQUIRED_VARS Gloo_INCLUDE_DIR Gloo_LIBRARY
)

mark_as_advanced(Gloo_FOUND)