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CMake/Modules/CMakeTestSwiftCompiler.cmake

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Simplify CMake per-source license notices Per-source copyright/license notice headers that spell out copyright holder names and years are hard to maintain and often out-of-date or plain wrong. Precise contributor information is already maintained automatically by the version control tool. Ultimately it is the receiver of a file who is responsible for determining its licensing status, and per-source notices are merely a convenience. Therefore it is simpler and more accurate for each source to have a generic notice of the license name and references to more detailed information on copyright holders and full license terms. Our `Copyright.txt` file now contains a list of Contributors whose names appeared source-level copyright notices. It also references version control history for more precise information. Therefore we no longer need to spell out the list of Contributors in each source file notice. Replace CMake per-source copyright/license notice headers with a short description of the license and links to `Copyright.txt` and online information available from "https://cmake.org/licensing". The online URL also handles cases of modules being copied out of our source into other projects, so we can drop our notices about replacing links with full license text. Run the `Utilities/Scripts/filter-notices.bash` script to perform the majority of the replacements mechanically. Manually fix up shebang lines and trailing newlines in a few files. Manually update the notices in a few files that the script does not handle.
2016-09-27 22:01:08 +03:00
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
Add rudimentary support for the Apple Swift language with Xcode Allow the `Swift` language to be enabled with the Xcode generator for Xcode >= 6.1. Reject it on other generators and with older Xcode versions. Since Apple is the only vendor implementing the language right now, the compiler id can be just `Apple`.
2015-07-06 23:15:49 +03:00
Swift: Add proper Swift compiler test This catches for example the unavailability of Swift with Xcode Beta6 and macosx10.10 SDK.
2015-09-06 19:19:18 +03:00
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 that 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" "")
file(WRITE ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/main.swift
"import Foundation\n"
"print(\"CMake\")\n")
try_compile(CMAKE_Swift_COMPILER_WORKS ${CMAKE_BINARY_DIR}
${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/main.swift
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)
PrintTestCompilerStatus("Swift" " -- broken")
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
"Determining if the Swift compiler works failed with "
"the following output:\n${__CMAKE_Swift_COMPILER_OUTPUT}\n\n")
message(FATAL_ERROR "The Swift compiler \"${CMAKE_Swift_COMPILER}\" "
"is not able to compile a simple test program.\nIt fails "
"with the following output:\n ${__CMAKE_Swift_COMPILER_OUTPUT}\n\n"
"CMake will not be able to correctly generate this project.")
else()
if(Swift_TEST_WAS_RUN)
PrintTestCompilerStatus("Swift" " -- works")
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
"Determining if the Swift compiler works passed with "
"the following output:\n${__CMAKE_Swift_COMPILER_OUTPUT}\n\n")
endif()
endif()
unset(__CMAKE_Swift_COMPILER_OUTPUT)