1 # Distributed under the OSI-approved BSD 3-Clause License. See accompanying
2 # file Copyright.txt or https://cmake.org/licensing for details.
4 if(CMAKE_Swift_COMPILER_FORCED)
5 # The compiler configuration was forced by the user.
6 # Assume the user has configured all compiler information.
7 set(CMAKE_Swift_COMPILER_WORKS TRUE)
11 include(CMakeTestCompilerCommon)
13 # Remove any cached result from an older CMake version.
14 # We now store this in CMakeSwiftCompiler.cmake.
15 unset(CMAKE_Swift_COMPILER_WORKS CACHE)
17 # This file is used by EnableLanguage in cmGlobalGenerator to
18 # determine that the selected C++ compiler can actually compile
19 # and link the most basic of programs. If not, a fatal error
20 # is set and cmake stops processing commands and will not generate
21 # any makefiles or projects.
22 if(NOT CMAKE_Swift_COMPILER_WORKS)
23 PrintTestCompilerStatus("Swift")
24 file(WRITE ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/main.swift
26 # Clear result from normal variable.
27 unset(CMAKE_Swift_COMPILER_WORKS)
28 # Puts test result in cache variable.
29 try_compile(CMAKE_Swift_COMPILER_WORKS ${CMAKE_BINARY_DIR}
30 ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/main.swift
31 OUTPUT_VARIABLE __CMAKE_Swift_COMPILER_OUTPUT)
32 # Move result from cache to normal variable.
33 set(CMAKE_Swift_COMPILER_WORKS ${CMAKE_Swift_COMPILER_WORKS})
34 unset(CMAKE_Swift_COMPILER_WORKS CACHE)
35 set(Swift_TEST_WAS_RUN 1)
38 if(NOT CMAKE_Swift_COMPILER_WORKS)
39 PrintTestCompilerResult(CHECK_FAIL "broken")
40 file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
41 "Determining if the Swift compiler works failed with "
42 "the following output:\n${__CMAKE_Swift_COMPILER_OUTPUT}\n\n")
43 string(REPLACE "\n" "\n " _output "${__CMAKE_Swift_COMPILER_OUTPUT}")
44 message(FATAL_ERROR "The Swift compiler\n \"${CMAKE_Swift_COMPILER}\"\n"
45 "is not able to compile a simple test program.\nIt fails "
46 "with the following output:\n ${_output}\n\n"
47 "CMake will not be able to correctly generate this project.")
49 if(Swift_TEST_WAS_RUN)
50 PrintTestCompilerResult(CHECK_PASS "works")
51 file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
52 "Determining if the Swift compiler works passed with "
53 "the following output:\n${__CMAKE_Swift_COMPILER_OUTPUT}\n\n")
56 # Unlike C and CXX we do not yet detect any information about the Swift ABI.
57 # However, one of the steps done for C and CXX as part of that detection is
58 # to initialize the implicit include directories. That is relevant here.
59 set(CMAKE_Swift_IMPLICIT_INCLUDE_DIRECTORIES "${_CMAKE_Swift_IMPLICIT_INCLUDE_DIRECTORIES_INIT}")
61 # Re-configure to save learned information.
62 configure_file(${CMAKE_ROOT}/Modules/CMakeSwiftCompiler.cmake.in
63 ${CMAKE_PLATFORM_INFO_DIR}/CMakeSwiftCompiler.cmake @ONLY)
64 include(${CMAKE_PLATFORM_INFO_DIR}/CMakeSwiftCompiler.cmake)
67 unset(__CMAKE_Swift_COMPILER_OUTPUT)