FindTPLCGNS.cmake

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#            TriBITS: Tribal Build, Integrate, and Test System
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# Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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# @HEADER

set(CNGS_ALLOW_MODERN FALSE CACHE BOOL "Allow finding CGNS as a modern CMake config file with exported targets (and only this way)")

if ((CGNS_ALLOW_MODERN AND HDF5_FOUND_MODERN_CONFIG_FILE) OR CGNS_FORCE_MODERN)

  set(minimum_modern_CGNS_version 3.9)
  print_var(CGNS_ALLOW_MODERN)
  print_var(CGNS_FORCE_MODERN)
  message("-- Using find_package(CGNS ${minimum_modern_CGNS_version} CONFIG) ...")
  find_package(CGNS ${minimum_modern_CGNS_version} CONFIG NAMES cgns)
  if (CGNS_FOUND)
    message("-- Found CGNS_CONFIG=${CGNS_CONFIG}")
    message("-- Generating CGNS::all_libs and CGNSConfig.cmake")
    set(CGNS_TARGET CGNS::cgns_shared)
    if(NOT TARGET CGNS::cgns_shared)
      set(CGNS_TARGET CGNS::cgns_static)
    endif()
    tribits_extpkg_create_imported_all_libs_target_and_config_file(
      CGNS
      INNER_FIND_PACKAGE_NAME  CGNS
      IMPORTED_TARGETS_FOR_ALL_LIBS  ${CGNS_TARGET})
    set(TPL_CGNS_NOT_FOUND FALSE)
  endif()

endif()

if (NOT TARGET  CGNS::all_libs)

#
# First, set up the variables for the (backward-compatible) TriBITS way of
# finding CGNS.  These are used in case find_package(CGNS ...) is not
# called or does not find CGNS.  Also, these variables need to be non-null
# in order to trigger the right behavior in the function
# tribits_tpl_find_include_dirs_and_libraries().
#
if (${CMAKE_VERSION} GREATER "3.13")
     cmake_policy(SET CMP0074 NEW)
endif()

set(REQUIRED_HEADERS cgnslib.h)
set(REQUIRED_LIBS_NAMES cgns)

#
# Second, search for CGNS components (if allowed) using the standard
# find_package(CGNS ...).
#
tribits_tpl_allow_pre_find_package(CGNS  CGNS_ALLOW_PREFIND)
if (CGNS_ALLOW_PREFIND)

  message("-- Using find_package(CGNS ...) ...")

  set(CMAKE_MODULE_PATH
    "${CMAKE_MODULE_PATH}"
    "${CMAKE_CURRENT_LIST_DIR}/find_modules"
    "${CMAKE_CURRENT_LIST_DIR}/utils"
     )
  
  find_package(CGNS)

  if (CGNS_FOUND)
    set(TPL_CGNS_LIBRARIES ${CGNS_LIBRARIES} CACHE PATH
      "List of semi-colon separated (full) paths to the CGNS libraries")
    set(TPL_CGNS_INCLUDE_DIRS ${CGNS_INCLUDE_DIRS} CACHE PATH
      "List of semi-colon separated list of directories containing CGNS header files")
  endif()

endif()

#
# Third, call tribits_tpl_find_include_dirs_and_libraries()
#
tribits_tpl_find_include_dirs_and_libraries( CGNS
  REQUIRED_HEADERS ${REQUIRED_HEADERS}
  REQUIRED_LIBS_NAMES ${REQUIRED_LIBS_NAMES})

endif()