73 lines
3.2 KiB
CMake
73 lines
3.2 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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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 ${CMAKE_MATCH_1})
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set(XcodeDefaultInfo "${toolchains_dir}/XcodeDefault.xctoolchain/ToolchainInfo.plist")
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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}/ToolchainInfo.plist
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DEPENDS ${LLVMToolchainDir}
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COMMAND ${CMAKE_COMMAND} -E copy "${XcodeDefaultInfo}" "${LLVMToolchainDir}/ToolchainInfo.plist"
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COMMAND /usr/libexec/PlistBuddy -c "Set:Identifier org.llvm.${PACKAGE_VERSION}" "${LLVMToolchainDir}/ToolchainInfo.plist")
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add_custom_target(install-xcode-toolchain
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DEPENDS ${LLVMToolchainDir}/ToolchainInfo.plist
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COMMAND "${CMAKE_COMMAND}" --build ${CMAKE_BINARY_DIR} --target all
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COMMAND "${CMAKE_COMMAND}"
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-DCMAKE_INSTALL_PREFIX=${LLVMToolchainDir}/usr/
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-P "${CMAKE_BINARY_DIR}/cmake_install.cmake"
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${cmake_3_2_USES_TERMINAL})
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