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cmake_minimum_required (VERSION 3.5)
project(CheckLanguage NONE)
include(CheckLanguage)
set(langs )
set(expect_C 1)
set(expect_CXX 1)
if(APPLE)
set(expect_OBJC 1)
set(expect_OBJCXX 1)
endif()
unset(expect_Fortran)
set(expect_NoSuchLanguage 0)
set(LANGUAGES C CXX Fortran CUDA NoSuchLanguage)
if(APPLE)
list(APPEND LANGUAGES OBJC OBJCXX)
endif()
foreach(test_lang ${LANGUAGES})
check_language(${test_lang})
if(NOT DEFINED CMAKE_${test_lang}_COMPILER)
message(FATAL_ERROR "check_language(${test_lang}) did not set result")
endif()
if(DEFINED expect_${test_lang})
if(expect_${test_lang} AND NOT CMAKE_${test_lang}_COMPILER)
message(FATAL_ERROR "check_language(${test_lang}) should not fail!")
elseif(NOT expect_${test_lang} AND CMAKE_${test_lang}_COMPILER)
message(FATAL_ERROR "check_language(${test_lang}) should not succeed!")
endif()
endif()
endforeach()
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