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170 lines
8.0 KiB
170 lines
8.0 KiB
# The CompilerRT build system requires CMake version 2.8.8 or higher in order
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# to use its support for building convenience "libraries" as a collection of
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# .o files. This is particularly useful in producing larger, more complex
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# runtime libraries.
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include(CheckIncludeFile)
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check_include_file(unwind.h HAVE_UNWIND_H)
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# Top level target used to build all compiler-rt libraries.
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add_custom_target(compiler-rt ALL)
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set_target_properties(compiler-rt PROPERTIES FOLDER "Compiler-RT Misc")
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# Setting these variables from an LLVM build is sufficient that compiler-rt can
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# construct the output paths, so it can behave as if it were in-tree here.
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if (LLVM_LIBRARY_OUTPUT_INTDIR AND LLVM_RUNTIME_OUTPUT_INTDIR AND PACKAGE_VERSION)
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set(LLVM_TREE_AVAILABLE On)
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endif()
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if (LLVM_TREE_AVAILABLE)
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# Compute the Clang version from the LLVM version.
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# FIXME: We should be able to reuse CLANG_VERSION variable calculated
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# in Clang cmake files, instead of copying the rules here.
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string(REGEX MATCH "[0-9]+\\.[0-9]+(\\.[0-9]+)?" CLANG_VERSION
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${PACKAGE_VERSION})
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# Setup the paths where compiler-rt runtimes and headers should be stored.
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set(COMPILER_RT_OUTPUT_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}/clang/${CLANG_VERSION})
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set(COMPILER_RT_EXEC_OUTPUT_DIR ${LLVM_RUNTIME_OUTPUT_INTDIR})
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set(COMPILER_RT_INSTALL_PATH lib${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION})
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option(COMPILER_RT_INCLUDE_TESTS "Generate and build compiler-rt unit tests."
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${LLVM_INCLUDE_TESTS})
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option(COMPILER_RT_ENABLE_WERROR "Fail and stop if warning is triggered"
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${LLVM_ENABLE_WERROR})
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# Use just-built Clang to compile/link tests on all platforms, except for
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# Windows where we need to use clang-cl instead.
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if(NOT MSVC)
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set(COMPILER_RT_TEST_COMPILER ${LLVM_RUNTIME_OUTPUT_INTDIR}/clang)
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set(COMPILER_RT_TEST_CXX_COMPILER ${LLVM_RUNTIME_OUTPUT_INTDIR}/clang++)
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else()
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set(COMPILER_RT_TEST_COMPILER ${LLVM_RUNTIME_OUTPUT_INTDIR}/clang.exe)
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set(COMPILER_RT_TEST_CXX_COMPILER ${LLVM_RUNTIME_OUTPUT_INTDIR}/clang++.exe)
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endif()
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else()
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# Take output dir and install path from the user.
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set(COMPILER_RT_OUTPUT_DIR ${CMAKE_CURRENT_BINARY_DIR} CACHE PATH
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"Path where built compiler-rt libraries should be stored.")
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set(COMPILER_RT_EXEC_OUTPUT_DIR ${CMAKE_CURRENT_BINARY_DIR}/bin CACHE PATH
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"Path where built compiler-rt executables should be stored.")
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set(COMPILER_RT_INSTALL_PATH ${CMAKE_INSTALL_PREFIX} CACHE PATH
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"Path where built compiler-rt libraries should be installed.")
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option(COMPILER_RT_INCLUDE_TESTS "Generate and build compiler-rt unit tests." OFF)
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option(COMPILER_RT_ENABLE_WERROR "Fail and stop if warning is triggered" OFF)
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# Use a host compiler to compile/link tests.
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set(COMPILER_RT_TEST_COMPILER ${CMAKE_C_COMPILER} CACHE PATH "Compiler to use for testing")
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set(COMPILER_RT_TEST_CXX_COMPILER ${CMAKE_CXX_COMPILER} CACHE PATH "C++ Compiler to use for testing")
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endif()
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if("${COMPILER_RT_TEST_COMPILER}" MATCHES "clang[+]*$")
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set(COMPILER_RT_TEST_COMPILER_ID Clang)
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elseif("${COMPILER_RT_TEST_COMPILER}" MATCHES "clang.*.exe$")
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set(COMPILER_RT_TEST_COMPILER_ID Clang)
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else()
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set(COMPILER_RT_TEST_COMPILER_ID GNU)
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endif()
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string(TOLOWER ${CMAKE_SYSTEM_NAME} COMPILER_RT_OS_DIR)
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set(COMPILER_RT_LIBRARY_OUTPUT_DIR
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${COMPILER_RT_OUTPUT_DIR}/lib/${COMPILER_RT_OS_DIR})
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set(COMPILER_RT_LIBRARY_INSTALL_DIR
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${COMPILER_RT_INSTALL_PATH}/lib/${COMPILER_RT_OS_DIR})
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if(APPLE)
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# On Darwin if /usr/include doesn't exist, the user probably has Xcode but not
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# the command line tools. If this is the case, we need to find the OS X
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# sysroot to pass to clang.
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if(NOT EXISTS /usr/include)
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execute_process(COMMAND xcodebuild -version -sdk macosx Path
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OUTPUT_VARIABLE OSX_SYSROOT
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ERROR_QUIET
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OUTPUT_STRIP_TRAILING_WHITESPACE)
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set(OSX_SYSROOT_FLAG "-isysroot${OSX_SYSROOT}")
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endif()
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option(COMPILER_RT_ENABLE_IOS "Enable building for iOS" Off)
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option(COMPILER_RT_ENABLE_WATCHOS "Enable building for watchOS - Experimental" Off)
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option(COMPILER_RT_ENABLE_TVOS "Enable building for tvOS - Experimental" Off)
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endif()
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macro(test_targets)
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# Find and run MSVC (not clang-cl) and get its version. This will tell clang-cl
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# what version of MSVC to pretend to be so that the STL works.
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set(MSVC_VERSION_FLAG "")
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if (MSVC)
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# Find and run MSVC (not clang-cl) and get its version. This will tell
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# clang-cl what version of MSVC to pretend to be so that the STL works.
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execute_process(COMMAND "$ENV{VSINSTALLDIR}/VC/bin/cl.exe"
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OUTPUT_QUIET
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ERROR_VARIABLE MSVC_COMPAT_VERSION
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)
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string(REGEX REPLACE "^.*Compiler Version ([0-9.]+) for .*$" "\\1"
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MSVC_COMPAT_VERSION "${MSVC_COMPAT_VERSION}")
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if (MSVC_COMPAT_VERSION MATCHES "^[0-9].+$")
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set(MSVC_VERSION_FLAG "-fms-compatibility-version=${MSVC_COMPAT_VERSION}")
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# Add this flag into the host build if this is clang-cl.
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if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
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append("${MSVC_VERSION_FLAG}" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
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elseif (COMPILER_RT_TEST_COMPILER_ID MATCHES "Clang")
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# Add this flag to test compiles to suppress clang's auto-detection
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# logic.
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append("${MSVC_VERSION_FLAG}" COMPILER_RT_TEST_COMPILER_CFLAGS)
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endif()
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endif()
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endif()
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# Generate the COMPILER_RT_SUPPORTED_ARCH list.
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if(ANDROID)
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# Examine compiler output to determine target architecture.
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detect_target_arch()
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set(COMPILER_RT_OS_SUFFIX "-android")
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elseif(NOT APPLE) # Supported archs for Apple platforms are generated later
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if("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "i[2-6]86|x86|amd64")
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if(NOT MSVC)
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test_target_arch(x86_64 "" "-m64")
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# FIXME: We build runtimes for both i686 and i386, as "clang -m32" may
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# target different variant than "$CMAKE_C_COMPILER -m32". This part should
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# be gone after we resolve PR14109.
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test_target_arch(i686 __i686__ "-m32")
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test_target_arch(i386 __i386__ "-m32")
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else()
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if (CMAKE_SIZEOF_VOID_P EQUAL 4)
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test_target_arch(i386 "" "")
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else()
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test_target_arch(x86_64 "" "")
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endif()
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endif()
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elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "powerpc")
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TEST_BIG_ENDIAN(HOST_IS_BIG_ENDIAN)
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if(HOST_IS_BIG_ENDIAN)
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test_target_arch(powerpc64 "" "-m64")
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else()
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test_target_arch(powerpc64le "" "-m64")
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endif()
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elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "s390x")
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test_target_arch(s390x "" "")
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elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "mipsel|mips64el")
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# Gcc doesn't accept -m32/-m64 so we do the next best thing and use
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# -mips32r2/-mips64r2. We don't use -mips1/-mips3 because we want to match
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# clang's default CPU's. In the 64-bit case, we must also specify the ABI
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# since the default ABI differs between gcc and clang.
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# FIXME: Ideally, we would build the N32 library too.
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test_target_arch(mipsel "" "-mips32r2" "--target=mipsel-linux-gnu")
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test_target_arch(mips64el "" "-mips64r2" "--target=mips64el-linux-gnu" "-mabi=n64")
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elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "mips")
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test_target_arch(mips "" "-mips32r2" "--target=mips-linux-gnu")
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test_target_arch(mips64 "" "-mips64r2" "--target=mips64-linux-gnu" "-mabi=n64")
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elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "arm")
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test_target_arch(arm "" "-march=armv7-a" "-mfloat-abi=soft")
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test_target_arch(armhf "" "-march=armv7-a" "-mfloat-abi=hard")
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elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "aarch32")
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test_target_arch(aarch32 "" "-march=armv8-a")
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elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "aarch64")
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test_target_arch(aarch64 "" "-march=armv8-a")
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elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "wasm32")
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test_target_arch(wasm32 "" "--target=wasm32-unknown-unknown")
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elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "wasm64")
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test_target_arch(wasm64 "" "--target=wasm64-unknown-unknown")
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endif()
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set(COMPILER_RT_OS_SUFFIX "")
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endif()
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endmacro()
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