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118 lines
4.8 KiB
CMake
118 lines
4.8 KiB
CMake
# OS X 10.11 El Capitan has just been released. One of the new features, System
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# Integrity Protection, prevents modifying the base OS install, even with sudo.
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# This prevents LLVM developers on OS X from being able to easily install new
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# system compilers. The feature can be disabled, but to make it easier for
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# developers to work without disabling SIP, this file can generate an Xcode
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# toolchain. Xcode toolchains are a mostly-undocumented feature that allows
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# multiple copies of low level tools to be installed to different locations, and
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# users can easily switch between them.
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# Setting an environment variable TOOLCHAINS to the toolchain's identifier will
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# result in /usr/bin/<tool> or xcrun <tool> to find the tool in the toolchain.
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# To make this work with Xcode 7.1 and later you can install the toolchain this
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# file generates anywhere on your system and set EXTERNAL_TOOLCHAINS_DIR to the
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# path specified by $CMAKE_INSTALL_PREFIX/Toolchains
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# This file generates a custom install-xcode-toolchain target which constructs
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# and installs a toolchain with the identifier in the pattern:
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# org.llvm.${PACKAGE_VERSION}. This toolchain can then be used to override the
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# system compiler by setting TOOLCHAINS=org.llvm.${PACKAGE_VERSION} in the
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# in the environment.
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# Example usage:
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# cmake -G Ninja -DLLVM_CREATE_XCODE_TOOLCHAIN=On
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# -DCMAKE_INSTALL_PREFIX=$PWD/install
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# ninja install-xcode-toolchain
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# export EXTERNAL_TOOLCHAINS_DIR=$PWD/install/Toolchains
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# export TOOLCHAINS=org.llvm.3.8.0svn
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# `xcrun -find clang` should return the installed clang, and `clang --version`
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# should show 3.8.0svn.
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if(NOT APPLE)
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return()
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endif()
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option(LLVM_CREATE_XCODE_TOOLCHAIN "Create a target to install LLVM into an Xcode toolchain" Off)
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if(NOT LLVM_CREATE_XCODE_TOOLCHAIN)
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return()
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endif()
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# XCODE_VERSION is set by CMake when using the Xcode generator, otherwise we need
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# to detect it manually here.
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if(NOT XCODE_VERSION)
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execute_process(
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COMMAND xcodebuild -version
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OUTPUT_VARIABLE xcodebuild_version
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OUTPUT_STRIP_TRAILING_WHITESPACE
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ERROR_FILE /dev/null
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)
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string(REGEX MATCH "Xcode ([0-9]([.][0-9])+)" version_match ${xcodebuild_version})
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if(version_match)
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message(STATUS "Identified Xcode Version: ${CMAKE_MATCH_1}")
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set(XCODE_VERSION ${CMAKE_MATCH_1})
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else()
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# If detecting Xcode version failed, set a crazy high version so we default
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# to the newest.
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set(XCODE_VERSION 99)
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message(WARNING "Failed to detect the version of an installed copy of Xcode, falling back to highest supported version. Set XCODE_VERSION to override.")
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endif()
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endif()
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# Xcode 8 requires CompatibilityVersion 2
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set(COMPAT_VERSION 2)
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if(XCODE_VERSION VERSION_LESS 8.0.0)
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# Xcode 7.3 (the first version supporting external toolchains) requires
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# CompatibilityVersion 1
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set(COMPAT_VERSION 1)
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endif()
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execute_process(
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COMMAND xcrun -find otool
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OUTPUT_VARIABLE clang_path
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OUTPUT_STRIP_TRAILING_WHITESPACE
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ERROR_FILE /dev/null
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)
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string(REGEX MATCH "(.*/Toolchains)/.*" toolchains_match ${clang_path})
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if(NOT toolchains_match)
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message(FATAL_ERROR "Could not identify toolchain dir")
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endif()
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set(toolchains_dir ${CMAKE_MATCH_1})
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set(LLVMToolchainDir "${CMAKE_INSTALL_PREFIX}/Toolchains/LLVM${PACKAGE_VERSION}.xctoolchain/")
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add_custom_command(OUTPUT ${LLVMToolchainDir}
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COMMAND ${CMAKE_COMMAND} -E make_directory ${LLVMToolchainDir})
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add_custom_command(OUTPUT ${LLVMToolchainDir}/Info.plist
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DEPENDS ${LLVMToolchainDir}
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COMMAND ${CMAKE_COMMAND} -E remove ${LLVMToolchainDir}/Info.plist
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COMMAND /usr/libexec/PlistBuddy -c "Add:CFBundleIdentifier string org.llvm.${PACKAGE_VERSION}" "${LLVMToolchainDir}/Info.plist"
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COMMAND /usr/libexec/PlistBuddy -c "Add:CompatibilityVersion integer ${COMPAT_VERSION}" "${LLVMToolchainDir}/Info.plist"
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)
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add_custom_target(build-xcode-toolchain
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COMMAND "${CMAKE_COMMAND}" --build ${CMAKE_BINARY_DIR} --target all)
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add_llvm_install_targets(install-xcode-toolchain
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DEPENDS ${LLVMToolchainDir}/Info.plist build-xcode-toolchain
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PREFIX ${LLVMToolchainDir}/usr/)
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if(LLVM_DISTRIBUTION_COMPONENTS)
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if(CMAKE_CONFIGURATION_TYPES)
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message(FATAL_ERROR "LLVM_DISTRIBUTION_COMPONENTS cannot be specified with multi-configuration generators (i.e. Xcode or Visual Studio)")
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endif()
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add_custom_target(install-distribution-toolchain
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DEPENDS ${LLVMToolchainDir}/Info.plist distribution)
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foreach(target ${LLVM_DISTRIBUTION_COMPONENTS})
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add_llvm_install_targets(install-distribution-${target}
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DEPENDS ${target}
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COMPONENT ${target}
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PREFIX ${LLVMToolchainDir}/usr/)
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add_dependencies(install-distribution-toolchain install-distribution-${target})
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endforeach()
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endif()
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