cmake_modules/FindGHC.cmake
author Wuzzy <Wuzzy2@mail.ru>
Wed, 07 Mar 2018 15:09:31 +0100
changeset 13089 c9cdbf630447
parent 10109 91d126fbd7bd
child 13291 31615a2e0db1
permissions -rw-r--r--
Stop SplitByChar also lowercasing the entire string. Fixes bug #581. It's weird that a function with this name would lowercase the whole string. Nemo and I have checked the history and code for any justifications of the lowercasing but we found none. I have checked in the code if anything actually depends on SplitByChar also lowercasing the string but I found nothing. It would surprise me since it's not obvious from the name IMO is bad coding practice anyway. Bug 581 is fixed by this because cLocale was (incorrectly) lowercased, which broke locale names like pt_BR to pt_br.

# - Try to find the Glasgow Haskell Compiler executable
# Once done this will define
#
#  GHC_FOUND       - system has GHC
#  GHC_VERSION     - GHC version
#  GHC_EXECUTABLE  - GHC executable
#
# Copyright (c) 2013, Vittorio Giovara <vittorio.giovara@gmail.com>
#
# Redistribution and use is allowed according to the terms of the BSD license.
# For details see the accompanying COPYING-CMAKE-SCRIPTS file.


find_program(GHC_EXECUTABLE
    NAMES ghc
    PATHS /opt/local/bin /usr/local/bin /usr/bin
    )

if (GHC_EXECUTABLE)
    # check ghc version
    execute_process(COMMAND ${GHC_EXECUTABLE} -V
                    OUTPUT_VARIABLE GHC_VERSION_OUTPUT
                    ERROR_VARIABLE GHC_VERSION_ERROR
                    RESULT_VARIABLE GHC_VERSION_RESULT
                    OUTPUT_STRIP_TRAILING_WHITESPACE
                    )

    if(${GHC_VERSION_RESULT} EQUAL 0)
        string(REGEX MATCH "([0-9]+)" GHC_VERSION ${GHC_VERSION_OUTPUT})
    else()
        message(SEND_ERROR "Command \"${GHC_EXECUTABLE} -V\" failed with output: ${GHC_VERSION_ERROR}")
    endif()
endif()

include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(GHC DEFAULT_MSG GHC_EXECUTABLE GHC_VERSION)
mark_as_advanced(GHC_VERSION)