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# The CompilerRT build system requires CMake version 2.8.8 or higher in order
# to use its support for building convenience "libraries" as a collection of
# .o files. This is particularly useful in producing larger, more complex
# runtime libraries.
include(CheckIncludeFile)
include(CheckCXXSourceCompiles)
check_include_file(unwind.h HAVE_UNWIND_H)
# Used by sanitizer_common and tests.
check_include_file(rpc/xdr.h HAVE_RPC_XDR_H)
if (NOT HAVE_RPC_XDR_H)
set(HAVE_RPC_XDR_H 0)
endif()
# Top level target used to build all compiler-rt libraries.
add_custom_target(compiler-rt ALL)
add_custom_target(install-compiler-rt)
add_custom_target(install-compiler-rt-stripped)
set_property(
TARGET
compiler-rt
install-compiler-rt
install-compiler-rt-stripped
PROPERTY
FOLDER "Compiler-RT Misc"
)
# Setting these variables from an LLVM build is sufficient that compiler-rt can
# construct the output paths, so it can behave as if it were in-tree here.
if (LLVM_LIBRARY_OUTPUT_INTDIR AND LLVM_RUNTIME_OUTPUT_INTDIR AND PACKAGE_VERSION)
set(LLVM_TREE_AVAILABLE On)
endif()
if (LLVM_TREE_AVAILABLE)
# Compute the Clang version from the LLVM version.
# FIXME: We should be able to reuse CLANG_VERSION variable calculated
# in Clang cmake files, instead of copying the rules here.
string(REGEX MATCH "[0-9]+\\.[0-9]+(\\.[0-9]+)?" CLANG_VERSION
${PACKAGE_VERSION})
# Setup the paths where compiler-rt runtimes and headers should be stored.
set(COMPILER_RT_OUTPUT_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}/clang/${CLANG_VERSION})
set(COMPILER_RT_EXEC_OUTPUT_DIR ${LLVM_RUNTIME_OUTPUT_INTDIR})
set(COMPILER_RT_INSTALL_PATH lib${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION})
option(COMPILER_RT_INCLUDE_TESTS "Generate and build compiler-rt unit tests."
${LLVM_INCLUDE_TESTS})
option(COMPILER_RT_ENABLE_WERROR "Fail and stop if warning is triggered"
${LLVM_ENABLE_WERROR})
# Use just-built Clang to compile/link tests on all platforms.
set(COMPILER_RT_TEST_COMPILER
${LLVM_RUNTIME_OUTPUT_INTDIR}/clang${CMAKE_EXECUTABLE_SUFFIX})
set(COMPILER_RT_TEST_CXX_COMPILER
${LLVM_RUNTIME_OUTPUT_INTDIR}/clang++${CMAKE_EXECUTABLE_SUFFIX})
else()
# Take output dir and install path from the user.
set(COMPILER_RT_OUTPUT_DIR ${CMAKE_CURRENT_BINARY_DIR} CACHE PATH
"Path where built compiler-rt libraries should be stored.")
set(COMPILER_RT_EXEC_OUTPUT_DIR ${CMAKE_CURRENT_BINARY_DIR}/bin CACHE PATH
"Path where built compiler-rt executables should be stored.")
set(COMPILER_RT_INSTALL_PATH ${CMAKE_INSTALL_PREFIX} CACHE PATH
"Path where built compiler-rt libraries should be installed.")
option(COMPILER_RT_INCLUDE_TESTS "Generate and build compiler-rt unit tests." OFF)
option(COMPILER_RT_ENABLE_WERROR "Fail and stop if warning is triggered" OFF)
# Use a host compiler to compile/link tests.
set(COMPILER_RT_TEST_COMPILER ${CMAKE_C_COMPILER} CACHE PATH "Compiler to use for testing")
set(COMPILER_RT_TEST_CXX_COMPILER ${CMAKE_CXX_COMPILER} CACHE PATH "C++ Compiler to use for testing")
endif()
if("${COMPILER_RT_TEST_COMPILER}" MATCHES "clang[+]*$")
set(COMPILER_RT_TEST_COMPILER_ID Clang)
elseif("${COMPILER_RT_TEST_COMPILER}" MATCHES "clang.*.exe$")
set(COMPILER_RT_TEST_COMPILER_ID Clang)
else()
set(COMPILER_RT_TEST_COMPILER_ID GNU)
endif()
if(NOT DEFINED COMPILER_RT_OS_DIR)
string(TOLOWER ${CMAKE_SYSTEM_NAME} COMPILER_RT_OS_DIR)
endif()
if(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE)
set(COMPILER_RT_LIBRARY_OUTPUT_DIR
${COMPILER_RT_OUTPUT_DIR})
set(COMPILER_RT_LIBRARY_INSTALL_DIR
${COMPILER_RT_INSTALL_PATH})
else(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR)
set(COMPILER_RT_LIBRARY_OUTPUT_DIR
${COMPILER_RT_OUTPUT_DIR}/lib/${COMPILER_RT_OS_DIR})
set(COMPILER_RT_LIBRARY_INSTALL_DIR
${COMPILER_RT_INSTALL_PATH}/lib/${COMPILER_RT_OS_DIR})
endif()
if(APPLE)
# On Darwin if /usr/include/c++ doesn't exist, the user probably has Xcode but
# not the command line tools (or is using macOS 10.14 or newer). If this is
# the case, we need to find the OS X sysroot to pass to clang.
if(NOT EXISTS /usr/include/c++)
execute_process(COMMAND xcrun -sdk macosx --show-sdk-path
OUTPUT_VARIABLE OSX_SYSROOT
ERROR_QUIET
OUTPUT_STRIP_TRAILING_WHITESPACE)
if (NOT OSX_SYSROOT OR NOT EXISTS ${OSX_SYSROOT})
message(WARNING "Detected OSX_SYSROOT ${OSX_SYSROOT} does not exist")
else()
message(STATUS "Found OSX_SYSROOT: ${OSX_SYSROOT}")
set(OSX_SYSROOT_FLAG "-isysroot${OSX_SYSROOT}")
endif()
else()
set(OSX_SYSROOT_FLAG "")
endif()
option(COMPILER_RT_ENABLE_IOS "Enable building for iOS" On)
option(COMPILER_RT_ENABLE_WATCHOS "Enable building for watchOS - Experimental" Off)
option(COMPILER_RT_ENABLE_TVOS "Enable building for tvOS - Experimental" Off)
else()
option(COMPILER_RT_DEFAULT_TARGET_ONLY "Build builtins only for the default target" Off)
endif()
if(WIN32 AND NOT MINGW AND NOT CYGWIN)
set(CMAKE_SHARED_LIBRARY_PREFIX_C "")
set(CMAKE_SHARED_LIBRARY_PREFIX_CXX "")
set(CMAKE_STATIC_LIBRARY_PREFIX_C "")
set(CMAKE_STATIC_LIBRARY_PREFIX_CXX "")
set(CMAKE_STATIC_LIBRARY_SUFFIX_C ".lib")
set(CMAKE_STATIC_LIBRARY_SUFFIX_CXX ".lib")
endif()
macro(test_targets)
# Find and run MSVC (not clang-cl) and get its version. This will tell clang-cl
# what version of MSVC to pretend to be so that the STL works.
set(MSVC_VERSION_FLAG "")
if (MSVC)
execute_process(COMMAND "$ENV{VSINSTALLDIR}/VC/bin/cl.exe"
OUTPUT_QUIET
ERROR_VARIABLE MSVC_COMPAT_VERSION
)
string(REGEX REPLACE "^.*Compiler Version ([0-9.]+) for .*$" "\\1"
MSVC_COMPAT_VERSION "${MSVC_COMPAT_VERSION}")
if (MSVC_COMPAT_VERSION MATCHES "^[0-9].+$")
set(MSVC_VERSION_FLAG "-fms-compatibility-version=${MSVC_COMPAT_VERSION}")
# Add this flag into the host build if this is clang-cl.
if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
append("${MSVC_VERSION_FLAG}" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
elseif (COMPILER_RT_TEST_COMPILER_ID MATCHES "Clang")
# Add this flag to test compiles to suppress clang's auto-detection
# logic.
append("${MSVC_VERSION_FLAG}" COMPILER_RT_TEST_COMPILER_CFLAGS)
endif()
endif()
endif()
# Generate the COMPILER_RT_SUPPORTED_ARCH list.
if(ANDROID)
# Examine compiler output to determine target architecture.
detect_target_arch()
set(COMPILER_RT_OS_SUFFIX "-android")
elseif(NOT APPLE) # Supported archs for Apple platforms are generated later
if(COMPILER_RT_DEFAULT_TARGET_ONLY)
add_default_target_arch(${COMPILER_RT_DEFAULT_TARGET_ARCH})
elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "i[2-6]86|x86|amd64")
if(NOT MSVC)
if(CMAKE_SYSTEM_NAME MATCHES "OpenBSD")
if (CMAKE_SIZEOF_VOID_P EQUAL 4)
test_target_arch(i386 __i386__ "-m32")
else()
test_target_arch(x86_64 "" "-m64")
endif()
else()
test_target_arch(x86_64 "" "-m64")
test_target_arch(i386 __i386__ "-m32")
endif()
else()
if (CMAKE_SIZEOF_VOID_P EQUAL 4)
test_target_arch(i386 "" "")
else()
test_target_arch(x86_64 "" "")
endif()
endif()
elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "powerpc")
# Strip out -nodefaultlibs when calling TEST_BIG_ENDIAN. Configuration
# will fail with this option when building with a sanitizer.
cmake_push_check_state()
string(REPLACE "-nodefaultlibs" "" CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
TEST_BIG_ENDIAN(HOST_IS_BIG_ENDIAN)
cmake_pop_check_state()
if(HOST_IS_BIG_ENDIAN)
test_target_arch(powerpc64 "" "-m64")
else()
test_target_arch(powerpc64le "" "-m64")
endif()
elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "s390x")
test_target_arch(s390x "" "")
elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "sparc")
test_target_arch(sparc "" "-m32")
test_target_arch(sparcv9 "" "-m64")
elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "mipsel|mips64el")
# Gcc doesn't accept -m32/-m64 so we do the next best thing and use
# -mips32r2/-mips64r2. We don't use -mips1/-mips3 because we want to match
# clang's default CPU's. In the 64-bit case, we must also specify the ABI
# since the default ABI differs between gcc and clang.
# FIXME: Ideally, we would build the N32 library too.
test_target_arch(mipsel "" "-mips32r2" "-mabi=32" "-D_LARGEFILE_SOURCE" "-D_FILE_OFFSET_BITS=64")
test_target_arch(mips64el "" "-mips64r2" "-mabi=64")
elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "mips")
test_target_arch(mips "" "-mips32r2" "-mabi=32" "-D_LARGEFILE_SOURCE" "-D_FILE_OFFSET_BITS=64")
test_target_arch(mips64 "" "-mips64r2" "-mabi=64")
elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "arm")
if(WIN32)
test_target_arch(arm "" "" "")
else()
test_target_arch(arm "" "-march=armv7-a" "-mfloat-abi=soft")
test_target_arch(armhf "" "-march=armv7-a" "-mfloat-abi=hard")
test_target_arch(armv6m "" "-march=armv6m" "-mfloat-abi=soft")
endif()
elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "aarch32")
test_target_arch(aarch32 "" "-march=armv8-a")
elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "aarch64")
test_target_arch(aarch64 "" "-march=armv8-a")
elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "riscv32")
test_target_arch(riscv32 "" "")
elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "riscv64")
test_target_arch(riscv64 "" "")
elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "wasm32")
test_target_arch(wasm32 "" "--target=wasm32-unknown-unknown")
elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "wasm64")
test_target_arch(wasm64 "" "--target=wasm64-unknown-unknown")
endif()
set(COMPILER_RT_OS_SUFFIX "")
endif()
endmacro()
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