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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
if(CMAKE_Swift_COMPILER_FORCED)
# The compiler configuration was forced by the user.
# Assume the user has configured all compiler information.
set(CMAKE_Swift_COMPILER_WORKS TRUE)
return()
endif()
include(CMakeTestCompilerCommon)
# Remove any cached result from an older CMake version.
# We now store this in CMakeSwiftCompiler.cmake.
unset(CMAKE_Swift_COMPILER_WORKS CACHE)
# This file is used by EnableLanguage in cmGlobalGenerator to
# determine that the selected C++ compiler can actually compile
# and link the most basic of programs. If not, a fatal error
# is set and cmake stops processing commands and will not generate
# any makefiles or projects.
if(NOT CMAKE_Swift_COMPILER_WORKS)
PrintTestCompilerStatus("Swift")
# Clear result from normal variable.
unset(CMAKE_Swift_COMPILER_WORKS)
# Puts test result in cache variable.
set(__CMAKE_Swift_TEST_SOURCE "print(\"CMake\")\n")
try_compile(CMAKE_Swift_COMPILER_WORKS
SOURCE_FROM_VAR main.swift __CMAKE_Swift_TEST_SOURCE
OUTPUT_VARIABLE __CMAKE_Swift_COMPILER_OUTPUT)
# Move result from cache to normal variable.
set(CMAKE_Swift_COMPILER_WORKS ${CMAKE_Swift_COMPILER_WORKS})
unset(CMAKE_Swift_COMPILER_WORKS CACHE)
set(Swift_TEST_WAS_RUN 1)
endif()
if(NOT CMAKE_Swift_COMPILER_WORKS)
PrintTestCompilerResult(CHECK_FAIL "broken")
string(REPLACE "\n" "\n " _output "${__CMAKE_Swift_COMPILER_OUTPUT}")
message(FATAL_ERROR "The Swift compiler\n \"${CMAKE_Swift_COMPILER}\"\n"
"is not able to compile a simple test program.\nIt fails "
"with the following output:\n ${_output}\n\n"
"CMake will not be able to correctly generate this project.")
else()
if(Swift_TEST_WAS_RUN)
PrintTestCompilerResult(CHECK_PASS "works")
endif()
# Unlike C and CXX we do not yet detect any information about the Swift ABI.
# However, one of the steps done for C and CXX as part of that detection is
# to initialize the implicit include directories. That is relevant here.
set(CMAKE_Swift_IMPLICIT_INCLUDE_DIRECTORIES "${_CMAKE_Swift_IMPLICIT_INCLUDE_DIRECTORIES_INIT}")
# Re-configure to save learned information.
configure_file(${CMAKE_ROOT}/Modules/CMakeSwiftCompiler.cmake.in
${CMAKE_PLATFORM_INFO_DIR}/CMakeSwiftCompiler.cmake @ONLY)
include(${CMAKE_PLATFORM_INFO_DIR}/CMakeSwiftCompiler.cmake)
endif()
unset(__CMAKE_Swift_TEST_SOURCE)
unset(__CMAKE_Swift_COMPILER_OUTPUT)
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