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llvm/libunwind/CMakeLists.txt
Louis Dionne 3ee0cec88e [runtimes] Remove FOO_TARGET_TRIPLE, FOO_SYSROOT and FOO_GCC_TOOLCHAIN 
Instead, folks can use the equivalent variables provided by CMake
to set those. This removal aims to reduce complexity and potential
for confusion when setting the target triple for building the runtimes,
and make it correct when `CMAKE_OSX_ARCHITECTURES` is used (right now
both `-arch` and `--target=` will end up being passed, which is downright
incorrect).

Differential Revision: https://reviews.llvm.org/D112155
2022-03-01 08:39:42 -05:00

381 lines
15 KiB
CMake
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if (NOT IS_DIRECTORY "${CMAKE_CURRENT_LIST_DIR}/../libcxx")
message(FATAL_ERROR "libunwind requires being built in a monorepo layout with libcxx available")
endif()
#===============================================================================
# Setup Project
#===============================================================================
cmake_minimum_required(VERSION 3.13.4)
set(LLVM_COMMON_CMAKE_UTILS "${CMAKE_CURRENT_SOURCE_DIR}/../cmake")
# Add path for custom modules
list(INSERT CMAKE_MODULE_PATH 0
"${CMAKE_CURRENT_SOURCE_DIR}/cmake"
"${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules"
"${LLVM_COMMON_CMAKE_UTILS}"
"${LLVM_COMMON_CMAKE_UTILS}/Modules"
)
set(LIBUNWIND_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
set(LIBUNWIND_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})
set(LIBUNWIND_LIBCXX_PATH "${CMAKE_CURRENT_LIST_DIR}/../libcxx" CACHE PATH
"Specify path to libc++ source.")
if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR OR LIBUNWIND_STANDALONE_BUILD)
message(FATAL_ERROR "The Standalone build has been deprecated since LLVM 14, and it is not supported anymore. "
"Please use one of the ways described at https://libcxx.llvm.org/BuildingLibcxx.html for "
"building libunwind.")
# We may have an incomplete toolchain - do language support tests without
# linking.
include(EnableLanguageNolink)
project(libunwind LANGUAGES NONE)
set(PACKAGE_NAME libunwind)
set(PACKAGE_VERSION 15.0.0git)
set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}")
set(PACKAGE_BUGREPORT "llvm-bugs@lists.llvm.org")
set(LIBUNWIND_STANDALONE_BUILD TRUE)
endif()
# Must go below project(..)
include(GNUInstallDirs)
if(LIBUNWIND_STANDALONE_BUILD)
llvm_enable_language_nolink(C CXX ASM)
# Find the LLVM sources and simulate LLVM CMake options.
include(HandleOutOfTreeLLVM)
# In a standalone build, we don't have llvm to automatically generate the
# llvm-lit script for us. So we need to provide an explicit directory that
# the configurator should write the script into.
set(LLVM_LIT_OUTPUT_DIR "${LIBUNWIND_BINARY_DIR}/bin")
else()
set(LLVM_LIT "${CMAKE_SOURCE_DIR}/utils/lit/lit.py")
endif()
#===============================================================================
# Setup CMake Options
#===============================================================================
include(CMakeDependentOption)
include(HandleCompilerRT)
# Define options.
option(LIBUNWIND_BUILD_32_BITS "Build 32 bit multilib libunwind. This option is not supported anymore when building the runtimes. Please specify a full triple instead." ${LLVM_BUILD_32_BITS})
if (LIBUNWIND_BUILD_32_BITS)
message(FATAL_ERROR "LIBUNWIND_BUILD_32_BITS is not supported anymore when building the runtimes, please specify a full triple instead.")
endif()
option(LIBUNWIND_ENABLE_CET "Build libunwind with CET enabled." OFF)
option(LIBUNWIND_ENABLE_ASSERTIONS "Enable assertions independent of build mode." ON)
option(LIBUNWIND_ENABLE_PEDANTIC "Compile with pedantic enabled." ON)
option(LIBUNWIND_ENABLE_WERROR "Fail and stop if a warning is triggered." OFF)
option(LIBUNWIND_ENABLE_SHARED "Build libunwind as a shared library." ON)
option(LIBUNWIND_ENABLE_STATIC "Build libunwind as a static library." ON)
option(LIBUNWIND_ENABLE_CROSS_UNWINDING "Enable cross-platform unwinding support." OFF)
option(LIBUNWIND_ENABLE_ARM_WMMX "Enable unwinding support for ARM WMMX registers." OFF)
option(LIBUNWIND_ENABLE_THREADS "Build libunwind with threading support." ON)
option(LIBUNWIND_WEAK_PTHREAD_LIB "Use weak references to refer to pthread functions." OFF)
option(LIBUNWIND_USE_COMPILER_RT "Use compiler-rt instead of libgcc" OFF)
option(LIBUNWIND_INCLUDE_DOCS "Build the libunwind documentation." ${LLVM_INCLUDE_DOCS})
option(LIBUNWIND_INCLUDE_TESTS "Build the libunwind tests." ${LLVM_INCLUDE_TESTS})
option(LIBUNWIND_IS_BAREMETAL "Build libunwind for baremetal targets." OFF)
option(LIBUNWIND_USE_FRAME_HEADER_CACHE "Cache frame headers for unwinding. Requires locking dl_iterate_phdr." OFF)
option(LIBUNWIND_REMEMBER_HEAP_ALLOC "Use heap instead of the stack for .cfi_remember_state." OFF)
option(LIBUNWIND_INSTALL_HEADERS "Install the libunwind headers." OFF)
set(LIBUNWIND_LIBDIR_SUFFIX "${LLVM_LIBDIR_SUFFIX}" CACHE STRING
"Define suffix of library directory name (32/64)")
option(LIBUNWIND_INSTALL_LIBRARY "Install the libunwind library." ON)
cmake_dependent_option(LIBUNWIND_INSTALL_STATIC_LIBRARY
"Install the static libunwind library." ON
"LIBUNWIND_ENABLE_STATIC;LIBUNWIND_INSTALL_LIBRARY" OFF)
cmake_dependent_option(LIBUNWIND_INSTALL_SHARED_LIBRARY
"Install the shared libunwind library." ON
"LIBUNWIND_ENABLE_SHARED;LIBUNWIND_INSTALL_LIBRARY" OFF)
set(LIBUNWIND_TEST_LINKER_FLAGS "" CACHE STRING
"Additional linker flags for test programs.")
set(LIBUNWIND_TEST_COMPILER_FLAGS "" CACHE STRING
"Additional compiler flags for test programs.")
# TODO: Remove this after branching for LLVM 15
if(LIBUNWIND_SYSROOT OR LIBUNWIND_TARGET_TRIPLE OR LIBUNWIND_GCC_TOOLCHAIN)
message(WARNING "LIBUNWIND_SYSROOT, LIBUNWIND_TARGET_TRIPLE and LIBUNWIND_GCC_TOOLCHAIN are not supported anymore, please use the native CMake equivalents instead")
endif()
if (LIBUNWIND_ENABLE_SHARED)
set(LIBUNWIND_DEFAULT_TEST_CONFIG "llvm-libunwind-shared.cfg.in")
else()
set(LIBUNWIND_DEFAULT_TEST_CONFIG "llvm-libunwind-static.cfg.in")
endif()
set(LIBUNWIND_TEST_CONFIG "${LIBUNWIND_DEFAULT_TEST_CONFIG}" CACHE STRING
"The path to the Lit testing configuration to use when running the tests.
If a relative path is provided, it is assumed to be relative to '<monorepo>/libunwind/test/configs'.")
if (NOT IS_ABSOLUTE "${LIBUNWIND_TEST_CONFIG}")
set(LIBUNWIND_TEST_CONFIG "${CMAKE_CURRENT_SOURCE_DIR}/test/configs/${LIBUNWIND_TEST_CONFIG}")
endif()
set(LIBUNWIND_TEST_PARAMS "" CACHE STRING
"A list of parameters to run the Lit test suite with.")
if (NOT LIBUNWIND_ENABLE_SHARED AND NOT LIBUNWIND_ENABLE_STATIC)
message(FATAL_ERROR "libunwind must be built as either a shared or static library.")
endif()
if (LIBUNWIND_ENABLE_CET AND MSVC)
message(FATAL_ERROR "libunwind CET support is not available for MSVC!")
endif()
option(LIBUNWIND_HIDE_SYMBOLS
"Do not export any symbols from the static library." OFF)
#===============================================================================
# Configure System
#===============================================================================
# Add path for custom modules
set(CMAKE_MODULE_PATH
"${CMAKE_CURRENT_SOURCE_DIR}/cmake"
${CMAKE_MODULE_PATH})
set(LIBUNWIND_INSTALL_INCLUDE_DIR "${CMAKE_INSTALL_INCLUDEDIR}" CACHE PATH
"Path where built libunwind headers should be installed.")
set(LIBUNWIND_INSTALL_RUNTIME_DIR "${CMAKE_INSTALL_BINDIR}" CACHE PATH
"Path where built libunwind runtime libraries should be installed.")
if(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE)
set(LIBUNWIND_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}/${LLVM_DEFAULT_TARGET_TRIPLE})
set(LIBUNWIND_INSTALL_LIBRARY_DIR lib${LLVM_LIBDIR_SUFFIX}/${LLVM_DEFAULT_TARGET_TRIPLE} CACHE PATH
"Path where built libunwind libraries should be installed.")
if(LIBCXX_LIBDIR_SUBDIR)
string(APPEND LIBUNWIND_LIBRARY_DIR /${LIBUNWIND_LIBDIR_SUBDIR})
string(APPEND LIBUNWIND_INSTALL_LIBRARY_DIR /${LIBUNWIND_LIBDIR_SUBDIR})
endif()
else()
if(LLVM_LIBRARY_OUTPUT_INTDIR)
set(LIBUNWIND_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR})
else()
set(LIBUNWIND_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBUNWIND_LIBDIR_SUFFIX})
endif()
set(LIBUNWIND_INSTALL_LIBRARY_DIR lib${LIBUNWIND_LIBDIR_SUFFIX} CACHE PATH
"Path where built libunwind libraries should be installed.")
endif()
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${LIBUNWIND_LIBRARY_DIR})
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${LIBUNWIND_LIBRARY_DIR})
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${LIBUNWIND_LIBRARY_DIR})
set(LIBUNWIND_C_FLAGS "")
set(LIBUNWIND_CXX_FLAGS "")
set(LIBUNWIND_COMPILE_FLAGS "")
set(LIBUNWIND_LINK_FLAGS "")
# Include macros for adding and removing libunwind flags.
include(HandleLibunwindFlags)
#===============================================================================
# Setup Compiler Flags
#===============================================================================
# Compiler tests may be failing if the compiler implicitly links in libunwind,
# which doesn't exist yet. This gets waived by --unwindlib=none
# later in config-ix below, but the tests for --target etc before that may
# be failing due to it. Only test compilation, not linking, for these
# tests here now.
set(CMAKE_TRY_COMPILE_TARGET_TYPE_ORIG ${CMAKE_TRY_COMPILE_TARGET_TYPE})
set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
set(CMAKE_TRY_COMPILE_TARGET_TYPE ${CMAKE_TRY_COMPILE_TARGET_TYPE_ORIG})
# Configure compiler.
include(config-ix)
if (LIBUNWIND_USE_COMPILER_RT AND NOT LIBUNWIND_HAS_NODEFAULTLIBS_FLAG)
list(APPEND LIBUNWIND_LINK_FLAGS "-rtlib=compiler-rt")
endif()
add_compile_flags_if_supported(-Werror=return-type)
if (LIBUNWIND_ENABLE_CET)
add_compile_flags_if_supported(-fcf-protection=full)
add_compile_flags_if_supported(-mshstk)
if (NOT LIBUNWIND_SUPPORTS_FCF_PROTECTION_EQ_FULL_FLAG)
message(SEND_ERROR "Compiler doesn't support CET -fcf-protection option!")
endif()
if (NOT LIBUNWIND_SUPPORTS_MSHSTK_FLAG)
message(SEND_ERROR "Compiler doesn't support CET -mshstk option!")
endif()
endif()
# Get warning flags
add_compile_flags_if_supported(-W)
add_compile_flags_if_supported(-Wall)
add_compile_flags_if_supported(-Wchar-subscripts)
add_compile_flags_if_supported(-Wconversion)
add_compile_flags_if_supported(-Wmismatched-tags)
add_compile_flags_if_supported(-Wmissing-braces)
add_compile_flags_if_supported(-Wnewline-eof)
add_compile_flags_if_supported(-Wno-unused-function)
add_compile_flags_if_supported(-Wshadow)
add_compile_flags_if_supported(-Wshorten-64-to-32)
add_compile_flags_if_supported(-Wsign-compare)
add_compile_flags_if_supported(-Wsign-conversion)
add_compile_flags_if_supported(-Wstrict-aliasing=2)
add_compile_flags_if_supported(-Wstrict-overflow=4)
add_compile_flags_if_supported(-Wunused-parameter)
add_compile_flags_if_supported(-Wunused-variable)
add_compile_flags_if_supported(-Wwrite-strings)
add_compile_flags_if_supported(-Wundef)
add_compile_flags_if_supported(-Wno-suggest-override)
if (WIN32)
# The headers lack matching dllexport attributes (_LIBUNWIND_EXPORT);
# silence the warning instead of cluttering the headers (which aren't
# necessarily the ones that the callers will use anyway) with the
# attributes.
add_compile_flags_if_supported(-Wno-dll-attribute-on-redeclaration)
endif()
if (LIBUNWIND_ENABLE_WERROR)
add_compile_flags_if_supported(-Werror)
add_compile_flags_if_supported(-WX)
else()
add_compile_flags_if_supported(-Wno-error)
add_compile_flags_if_supported(-WX-)
endif()
if (LIBUNWIND_ENABLE_PEDANTIC)
add_compile_flags_if_supported(-pedantic)
endif()
# Get feature flags.
# Exceptions
# Catches C++ exceptions only and tells the compiler to assume that extern C
# functions never throw a C++ exception.
add_cxx_compile_flags_if_supported(-fstrict-aliasing)
add_cxx_compile_flags_if_supported(-EHsc)
# Don't run the linker in this CMake check.
#
# The reason why this was added is that when building libunwind for
# ARM Linux, we need to pass the -funwind-tables flag in order for it to
# work properly with ARM EHABI.
#
# However, when performing CMake checks, adding this flag causes the check
# to produce a false negative, because the compiler generates calls
# to __aeabi_unwind_cpp_pr0, which is defined in libunwind itself,
# which isn't built yet, so the linker complains about undefined symbols.
#
# This leads to libunwind not being built with this flag, which makes
# libunwind quite useless in this setup.
set(_previous_CMAKE_TRY_COMPILE_TARGET_TYPE ${CMAKE_TRY_COMPILE_TARGET_TYPE})
set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
add_compile_flags_if_supported(-funwind-tables)
set(CMAKE_TRY_COMPILE_TARGET_TYPE ${_previous_CMAKE_TRY_COMPILE_TARGET_TYPE})
if (LIBUNWIND_USES_ARM_EHABI AND NOT LIBUNWIND_SUPPORTS_FUNWIND_TABLES_FLAG)
message(SEND_ERROR "The -funwind-tables flag must be supported "
"because this target uses ARM Exception Handling ABI")
endif()
add_cxx_compile_flags_if_supported(-fno-exceptions)
add_cxx_compile_flags_if_supported(-fno-rtti)
# Ensure that we don't depend on C++ standard library.
if (LIBUNWIND_HAS_NOSTDINCXX_FLAG)
list(APPEND LIBUNWIND_COMPILE_FLAGS -nostdinc++)
# Remove -stdlib flags to prevent them from causing an unused flag warning.
string(REPLACE "--stdlib=libc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
string(REPLACE "--stdlib=libstdc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
string(REPLACE "-stdlib=libc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
string(REPLACE "-stdlib=libstdc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
endif()
# Assert
string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)
if (LIBUNWIND_ENABLE_ASSERTIONS)
# MSVC doesn't like _DEBUG on release builds. See PR 4379.
if (NOT MSVC)
add_compile_flags(-D_DEBUG)
endif()
# On Release builds cmake automatically defines NDEBUG, so we
# explicitly undefine it:
if (uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE")
add_compile_flags(-UNDEBUG)
endif()
else()
if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE")
add_compile_flags(-DNDEBUG)
endif()
endif()
# Cross-unwinding
if (NOT LIBUNWIND_ENABLE_CROSS_UNWINDING)
add_compile_flags(-D_LIBUNWIND_IS_NATIVE_ONLY)
endif()
# Threading-support
if (NOT LIBUNWIND_ENABLE_THREADS)
add_compile_flags(-D_LIBUNWIND_HAS_NO_THREADS)
endif()
# ARM WMMX register support
if (LIBUNWIND_ENABLE_ARM_WMMX)
# __ARM_WMMX is a compiler pre-define (as per the ACLE 2.0). Clang does not
# define this macro for any supported target at present. Therefore, here we
# provide the option to explicitly enable support for WMMX registers in the
# unwinder.
add_compile_flags(-D__ARM_WMMX)
endif()
if(LIBUNWIND_IS_BAREMETAL)
add_compile_definitions(_LIBUNWIND_IS_BAREMETAL)
endif()
if(LIBUNWIND_USE_FRAME_HEADER_CACHE)
add_compile_definitions(_LIBUNWIND_USE_FRAME_HEADER_CACHE)
endif()
if(LIBUNWIND_REMEMBER_HEAP_ALLOC)
add_compile_definitions(_LIBUNWIND_REMEMBER_HEAP_ALLOC)
endif()
# This is the _ONLY_ place where add_definitions is called.
if (MSVC)
add_definitions(-D_CRT_SECURE_NO_WARNINGS)
endif()
# Disable DLL annotations on Windows for static builds.
if (WIN32 AND LIBUNWIND_ENABLE_STATIC AND NOT LIBUNWIND_ENABLE_SHARED)
add_definitions(-D_LIBUNWIND_HIDE_SYMBOLS)
endif()
if (LIBUNWIND_HAS_COMMENT_LIB_PRAGMA)
if (LIBUNWIND_HAS_DL_LIB)
add_definitions(-D_LIBUNWIND_LINK_DL_LIB)
endif()
if (LIBUNWIND_HAS_PTHREAD_LIB)
add_definitions(-D_LIBUNWIND_LINK_PTHREAD_LIB)
endif()
endif()
#===============================================================================
# Setup Source Code
#===============================================================================
add_subdirectory(include)
add_subdirectory(src)
if (LIBUNWIND_INCLUDE_DOCS)
add_subdirectory(docs)
endif()
if (LIBUNWIND_INCLUDE_TESTS AND EXISTS ${LLVM_CMAKE_DIR})
add_subdirectory(test)
endif()
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