# Based on CheckLibraryExists.cmake from CMake#=============================================================================# Copyright 2002-2009 Kitware, Inc.## Distributed under the OSI-approved BSD License## This software is distributed WITHOUT ANY WARRANTY; without even the# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.# See the License for more information.#=============================================================================macro(CHECK_HASKELL_MODULE_EXISTS MODULE FUNCTION PARAMCOUNT LIBRARY) set(VARIABLE "HS_MODULE_${LIBRARY}_${FUNCTION}") if("${VARIABLE}" MATCHES "^${VARIABLE}$") message(STATUS "Looking for ${FUNCTION} in ${MODULE}") set(PARAMETERS "") if(PARAMCOUNT GREATER 0) foreach(__TRASH__ RANGE 1 ${PARAMCOUNT}) set(PARAMETERS "${PARAMETERS} undefined") endforeach() endif() set(PARAMETERS "") execute_process(COMMAND ${GHC_EXECUTABLE} "-DMODULE=${MODULE}" "-DFUNCTION=${FUNCTION}" "-DPARAMETERS=${PARAMETERS}" -cpp -c "${CMAKE_MODULE_PATH}/checkModule.hs" RESULT_VARIABLE COMMAND_RESULT ERROR_VARIABLE BUILD_ERROR OUTPUT_STRIP_TRAILING_WHITESPACE ) if(${COMMAND_RESULT} EQUAL 0) message(STATUS "Looking for ${FUNCTION} in ${MODULE} - found") set(${VARIABLE} 1 CACHE INTERNAL "Have module ${MODULE}") file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log "Determining if the function ${FUNCTION} exists in the ${MODULE} passed\n\n") else() message(STATUS "Looking for ${FUNCTION} in ${MODULE} - not found") set(${VARIABLE} "" CACHE INTERNAL "Have module ${MODULE}") file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log "Determining if the function ${FUNCTION} exists in the ${MODULE} " "failed with the following output:\n" "${BUILD_ERROR}\n\n") message(FATAL_ERROR "Haskell library '${LIBRARY}' required") endif() endif()endmacro()