cmake_modules/CheckHaskellPackageExists.cmake
author Wuzzy <Wuzzy2@mail.ru>
Mon, 17 Sep 2018 22:37:47 +0200
changeset 13785 4ed202f0428e
parent 13291 31615a2e0db1
child 15700 a3d2f69f3ac1
permissions -rw-r--r--
Easier back jumps in Basic Movement Training (fixes bug #692) The explanation of Back Jumping (2/2) has been simplified and the "hard" part has been made easier by lowering the girders. The original idea was that I wanted to force players to learn how to jump higher by delaying the 2nd backspace keypress. But this turned out that this section was too unfair and we have lost at least one player due to rage-quitting, according to feedback.
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# Checks if a given Haskell package exists (using ghc-pkg)
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# and fails if it's missing.
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# Loosely based on CheckLibraryExists.cmake from CMake.
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#=============================================================================
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# Copyright 2002-2009 Kitware, Inc.
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#
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# Distributed under the OSI-approved BSD License
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#
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# This software is distributed WITHOUT ANY WARRANTY; without even the
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# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# See the License for more information.
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#=============================================================================
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macro(CHECK_HASKELL_PACKAGE_EXISTS PACKAGE MODULE FUNCTION PARAMCOUNT)
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# NOTE: MODULE, FUNCTION and PARAMCOUNT are curretly ignored.
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# TODO: Either implement these or drop?
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  set(VARIABLE "HS_PACKAGE_${PACKAGE}")
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  if(NOT (${VARIABLE} EQUAL "1"))
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    message(STATUS "Looking for Haskell package ${PACKAGE} ...")
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    execute_process(COMMAND ${GHC_PKG_EXECUTABLE}
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                    "latest"
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                    ${PACKAGE}
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                    "--simple-output"
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                    RESULT_VARIABLE COMMAND_RESULT
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                    ERROR_VARIABLE BUILD_ERROR
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                    OUTPUT_STRIP_TRAILING_WHITESPACE
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                    OUTPUT_QUIET
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                    )
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    if(${COMMAND_RESULT} EQUAL 0)
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      message(STATUS "Looking for Haskell package ${PACKAGE} - found")
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      set(${VARIABLE} "1" CACHE INTERNAL "Have package ${PACKAGE}")
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      file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
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        "Determining if the Haskell package ${PACKAGE} exists has passed\n\n")
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    else()
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      message(STATUS "Looking for Haskell package ${PACKAGE} - not found")
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      set(${VARIABLE} "0" CACHE INTERNAL "Have package ${PACKAGE}")
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      file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
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        "Determining if the Haskell package ${PACKAGE} "
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        "exists failed with the following output:\n"
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        "${BUILD_ERROR}\n\n")
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      message(FATAL_ERROR "Haskell package '${PACKAGE}' required")
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    endif()
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  endif()
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endmacro()