cmake_modules/CheckHaskellPackageExists.cmake
author Wuzzy <Wuzzy2@mail.ru>
Sat, 06 Jun 2020 15:40:51 +0200
changeset 15620 6e72bd61002e
parent 13291 31615a2e0db1
child 15722 a3d2f69f3ac1
permissions -rw-r--r--
Disable gfMoreWind for land objects on turn end only after a fixed-time delay 15s sounds much, but it's the average amount for gfMineStrike mines to settle naturally. And it would be very confusing to see falling mines suddenly not caring about gfMoreWind for no apparent reason. Note this whole thing is a giant hack anyway, to prevent a turn being blocked by infinitely bouncing mines. The better solution would be to help gfMoreWind-affected land objects settle naturally more reliably even under extreme wind. But this commit is "good enough" for now. If you don't like the delay, you can always tweak the constant.

# Checks if a given Haskell package exists (using ghc-pkg)
# and fails if it's missing.
# Loosely 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_PACKAGE_EXISTS PACKAGE MODULE FUNCTION PARAMCOUNT)
# NOTE: MODULE, FUNCTION and PARAMCOUNT are curretly ignored.
# TODO: Either implement these or drop?

  set(VARIABLE "HS_PACKAGE_${PACKAGE}")
  if(NOT (${VARIABLE} EQUAL "1"))
    message(STATUS "Looking for Haskell package ${PACKAGE} ...")

    execute_process(COMMAND ${GHC_PKG_EXECUTABLE}
                    "latest"
                    ${PACKAGE}
                    "--simple-output"
                    RESULT_VARIABLE COMMAND_RESULT
                    ERROR_VARIABLE BUILD_ERROR
                    OUTPUT_STRIP_TRAILING_WHITESPACE
                    OUTPUT_QUIET
                    )

    if(${COMMAND_RESULT} EQUAL 0)
      message(STATUS "Looking for Haskell package ${PACKAGE} - found")
      set(${VARIABLE} "1" CACHE INTERNAL "Have package ${PACKAGE}")
      file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
        "Determining if the Haskell package ${PACKAGE} exists has passed\n\n")
    else()
      message(STATUS "Looking for Haskell package ${PACKAGE} - not found")
      set(${VARIABLE} "0" CACHE INTERNAL "Have package ${PACKAGE}")
      file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
        "Determining if the Haskell package ${PACKAGE} "
        "exists failed with the following output:\n"
        "${BUILD_ERROR}\n\n")
      message(FATAL_ERROR "Haskell package '${PACKAGE}' required")
    endif()
  endif()
endmacro()