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94fc5a96f5
darling-libcxx/CMakeLists.txt
Petr Hosek 94fc5a96f5 [CMake][libcxx] Do not rely on the existence of c++abi or unwind targets 
There is no guaranteed order in which CMake files for individual
runtimes are invoked and therefore we cannot rely on existence of
targets defined in other runtimes. Use the new HAVE_<name> options
instead in those cases.

Differential Revision: https://reviews.llvm.org/D28391

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291632 91177308-0d34-0410-b5e6-96231b3b80d8
2017-01-11 00:56:10 +00:00

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# See www/CMake.html for instructions on how to build libcxx with CMake.
#===============================================================================
# Setup Project
#===============================================================================
cmake_minimum_required(VERSION 3.4.3)
if(POLICY CMP0042)
cmake_policy(SET CMP0042 NEW) # Set MACOSX_RPATH=YES by default
endif()
if(POLICY CMP0022)
cmake_policy(SET CMP0022 NEW) # Required when interacting with LLVM and Clang
endif()
# Add path for custom modules
set(CMAKE_MODULE_PATH
"${CMAKE_CURRENT_SOURCE_DIR}/cmake"
"${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules"
${CMAKE_MODULE_PATH}
)
if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
project(libcxx CXX C)
set(PACKAGE_NAME libcxx)
set(PACKAGE_VERSION 4.0.0svn)
set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}")
set(PACKAGE_BUGREPORT "llvm-bugs@lists.llvm.org")
# Find the LLVM sources and simulate LLVM CMake options.
include(HandleOutOfTreeLLVM)
endif()
if (LIBCXX_STANDALONE_BUILD)
include(FindPythonInterp)
if( NOT PYTHONINTERP_FOUND )
message(WARNING "Failed to find python interpreter. "
"The libc++ test suite will be disabled.")
set(LLVM_INCLUDE_TESTS OFF)
endif()
endif()
# Require out of source build.
include(MacroEnsureOutOfSourceBuild)
MACRO_ENSURE_OUT_OF_SOURCE_BUILD(
"${PROJECT_NAME} requires an out of source build. Please create a separate
build directory and run 'cmake /path/to/${PROJECT_NAME} [options]' there."
)
#===============================================================================
# Setup CMake Options
#===============================================================================
include(CMakeDependentOption)
# Basic options ---------------------------------------------------------------
option(LIBCXX_ENABLE_ASSERTIONS "Enable assertions independent of build mode." ON)
option(LIBCXX_ENABLE_SHARED "Build libc++ as a shared library." ON)
option(LIBCXX_ENABLE_STATIC "Build libc++ as a static library." ON)
option(LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY "Build libc++experimental.a" ON)
option(LIBCXX_ENABLE_FILESYSTEM
"Build filesystem as part of libc++experimental.a" ${LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY})
option(LIBCXX_INCLUDE_TESTS "Build the libc++ tests." ${LLVM_INCLUDE_TESTS})
# Benchmark options -----------------------------------------------------------
option(LIBCXX_INCLUDE_BENCHMARKS "Build the libc++ benchmarks and their dependancies" ON)
set(LIBCXX_BENCHMARK_NATIVE_STDLIB "" CACHE STRING
"Build the benchmarks against the specified native STL.
The value must be one of libc++/libstdc++")
set(LIBCXX_BENCHMARK_NATIVE_GCC_TOOLCHAIN "" CACHE STRING
"Use alternate GCC toolchain when building the native benchmarks")
if (LIBCXX_BENCHMARK_NATIVE_STDLIB)
if (NOT (LIBCXX_BENCHMARK_NATIVE_STDLIB STREQUAL "libc++"
OR LIBCXX_BENCHMARK_NATIVE_STDLIB STREQUAL "libstdc++"))
message(FATAL_ERROR "Invalid value for LIBCXX_BENCHMARK_NATIVE_STDLIB: "
"'${LIBCXX_BENCHMARK_NATIVE_STDLIB}'")
endif()
endif()
option(LIBCXX_INCLUDE_DOCS "Build the libc++ documentation." ${LLVM_INCLUDE_DOCS})
set(LIBCXX_LIBDIR_SUFFIX "${LLVM_LIBDIR_SUFFIX}" CACHE STRING
"Define suffix of library directory name (32/64)")
option(LIBCXX_INSTALL_HEADERS "Install the libc++ headers." ON)
option(LIBCXX_INSTALL_LIBRARY "Install the libc++ library." ON)
option(LIBCXX_INSTALL_SUPPORT_HEADERS "Install libc++ support headers." ON)
cmake_dependent_option(LIBCXX_INSTALL_EXPERIMENTAL_LIBRARY
"Install libc++experimental.a" ON
"LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY;LIBCXX_INSTALL_LIBRARY" OFF)
set(LIBCXX_ABI_VERSION 1 CACHE STRING "ABI version of libc++.")
option(LIBCXX_ABI_UNSTABLE "Unstable ABI of libc++." OFF)
option(LIBCXX_USE_COMPILER_RT "Use compiler-rt instead of libgcc" OFF)
if (NOT LIBCXX_ENABLE_SHARED AND NOT LIBCXX_ENABLE_STATIC)
message(FATAL_ERROR "libc++ must be built as either a shared or static library.")
endif()
# ABI Library options ---------------------------------------------------------
set(LIBCXX_CXX_ABI "default" CACHE STRING
"Specify C++ ABI library to use.")
set(CXXABIS none default libcxxabi libcxxrt libstdc++ libsupc++)
set_property(CACHE LIBCXX_CXX_ABI PROPERTY STRINGS ;${CXXABIS})
# FIXME: This is a temporary hack to force LLVM buildbots to store
# the fixed cache entry instead of the previous cache entry. This is needed
# because some LLVM buildbots don't clear their cache. It will be removed
# once all LLVM bots have been run.
if (LIBCXX_CXX_ABI STREQUAL "")
set(LIBCXX_CXX_ABI "default" CACHE STRING
"Specify the C++ ABI library to use." FORCE)
endif()
# Setup the default options if LIBCXX_CXX_ABI is not specified.
if (LIBCXX_CXX_ABI STREQUAL "default")
find_path(
LIBCXX_LIBCXXABI_INCLUDES_INTERNAL
cxxabi.h
PATHS ${LLVM_MAIN_SRC_DIR}/projects/libcxxabi/include
${LLVM_MAIN_SRC_DIR}/runtimes/libcxxabi/include
NO_DEFAULT_PATH
)
if (IS_DIRECTORY "${LIBCXX_LIBCXXABI_INCLUDES_INTERNAL}")
set(LIBCXX_CXX_ABI_LIBNAME "libcxxabi")
set(LIBCXX_CXX_ABI_INCLUDE_PATHS "${LIBCXX_LIBCXXABI_INCLUDES_INTERNAL}")
set(LIBCXX_CXX_ABI_INTREE 1)
else()
if (WIN32 AND NOT MINGW)
# FIXME: Figure out how to configure the ABI library on Windows.
set(LIBCXX_CXX_ABI_LIBNAME "none")
else()
set(LIBCXX_CXX_ABI_LIBNAME "default")
endif()
endif()
else()
set(LIBCXX_CXX_ABI_LIBNAME "${LIBCXX_CXX_ABI}")
endif()
# Use a static copy of the ABI library when linking libc++. This option
# cannot be used with LIBCXX_ENABLE_ABI_LINKER_SCRIPT.
option(LIBCXX_ENABLE_STATIC_ABI_LIBRARY "Statically link the ABI library" OFF)
# Generate and install a linker script inplace of libc++.so. The linker script
# will link libc++ to the correct ABI library. This option is on by default
# On UNIX platforms other than Apple unless 'LIBCXX_ENABLE_STATIC_ABI_LIBRARY'
# is on. This option is also disabled when the ABI library is not specified
# or is specified to be "none".
set(ENABLE_LINKER_SCRIPT_DEFAULT_VALUE OFF)
if (LLVM_HAVE_LINK_VERSION_SCRIPT AND NOT LIBCXX_ENABLE_STATIC_ABI_LIBRARY
AND NOT LIBCXX_CXX_ABI_LIBNAME STREQUAL "none"
AND NOT LIBCXX_CXX_ABI_LIBNAME STREQUAL "default"
AND PYTHONINTERP_FOUND
AND LIBCXX_ENABLE_SHARED)
set(ENABLE_LINKER_SCRIPT_DEFAULT_VALUE ON)
endif()
option(LIBCXX_ENABLE_ABI_LINKER_SCRIPT
"Use and install a linker script for the given ABI library"
${ENABLE_LINKER_SCRIPT_DEFAULT_VALUE})
# Build libc++abi with libunwind. We need this option to determine whether to
# link with libunwind or libgcc_s while running the test cases.
option(LIBCXXABI_USE_LLVM_UNWINDER "Build and use the LLVM unwinder." OFF)
# Target options --------------------------------------------------------------
option(LIBCXX_BUILD_32_BITS "Build 32 bit libc++." ${LLVM_BUILD_32_BITS})
set(LIBCXX_SYSROOT "" CACHE STRING "Use alternate sysroot.")
set(LIBCXX_GCC_TOOLCHAIN "" CACHE STRING "Use alternate GCC toolchain.")
# Feature options -------------------------------------------------------------
option(LIBCXX_ENABLE_EXCEPTIONS "Use exceptions." ON)
option(LIBCXX_ENABLE_RTTI "Use run time type information." ON)
option(LIBCXX_ENABLE_GLOBAL_FILESYSTEM_NAMESPACE "Build libc++ with support for the global filesystem namespace." ON)
option(LIBCXX_ENABLE_STDIN "Build libc++ with support for stdin/std::cin." ON)
option(LIBCXX_ENABLE_STDOUT "Build libc++ with support for stdout/std::cout." ON)
option(LIBCXX_ENABLE_THREADS "Build libc++ with support for threads." ON)
option(LIBCXX_ENABLE_THREAD_UNSAFE_C_FUNCTIONS "Build libc++ with support for thread-unsafe C functions" ON)
option(LIBCXX_ENABLE_MONOTONIC_CLOCK
"Build libc++ with support for a monotonic clock.
This option may only be set to OFF when LIBCXX_ENABLE_THREADS=OFF." ON)
option(LIBCXX_HAS_MUSL_LIBC "Build libc++ with support for the Musl C library" OFF)
option(LIBCXX_HAS_PTHREAD_API "Ignore auto-detection and force use of pthread API" OFF)
option(LIBCXX_HAS_EXTERNAL_THREAD_API
"Build libc++ with an externalized threading API.
This option may only be set to ON when LIBCXX_ENABLE_THREADS=ON." OFF)
option(LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY
"Build libc++ with an externalized threading library.
This option may only be set to ON when LIBCXX_ENABLE_THREADS=ON" OFF)
# Misc options ----------------------------------------------------------------
# FIXME: Turn -pedantic back ON. It is currently off because it warns
# about #include_next which is used everywhere.
option(LIBCXX_ENABLE_PEDANTIC "Compile with pedantic enabled." OFF)
option(LIBCXX_ENABLE_WERROR "Fail and stop if a warning is triggered." OFF)
option(LIBCXX_DISABLE_MACRO_CONFLICT_WARNINGS "Disable #warnings about conflicting macros." OFF)
option(LIBCXX_GENERATE_COVERAGE "Enable generating code coverage." OFF)
set(LIBCXX_COVERAGE_LIBRARY "" CACHE STRING
"The Profile-rt library used to build with code coverage")
# Don't allow a user to accidentally overwrite the system libc++ installation on Darwin.
# If the user specifies -DCMAKE_INSTALL_PREFIX=/usr the install rules for libc++
# will not be generated and a warning will be issued.
option(LIBCXX_OVERRIDE_DARWIN_INSTALL "Enable overwriting darwins libc++ installation." OFF)
mark_as_advanced(LIBCXX_OVERRIDE_DARWIN_INSTALL) # Don't show this option by default.
if (${CMAKE_SYSTEM_NAME} MATCHES "Darwin" AND NOT LIBCXX_OVERRIDE_DARWIN_INSTALL)
if ("${CMAKE_INSTALL_PREFIX}" STREQUAL "/usr")
message(WARNING "Disabling libc++ install rules because installation would "
"overwrite the systems installation. Configure with "
"-DLIBCXX_OVERRIDE_DARWIN_INSTALL=ON to suppress this behaviour.")
mark_as_advanced(CLEAR LIBCXX_OVERRIDE_DARWIN_INSTALL) # Show the override option.
set(LIBCXX_INSTALL_HEADERS OFF)
set(LIBCXX_INSTALL_LIBRARY OFF)
endif()
endif()
set(LIBCXX_CONFIGURE_IDE_DEFAULT OFF)
if (XCODE OR MSVC_IDE)
set(LIBCXX_CONFIGURE_IDE_DEFAULT ON)
endif()
option(LIBCXX_CONFIGURE_IDE "Configure libcxx for use within an IDE"
${LIBCXX_CONFIGURE_IDE_DEFAULT})
#===============================================================================
# Check option configurations
#===============================================================================
if (LIBCXX_ENABLE_FILESYSTEM AND NOT LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY)
message(FATAL_ERROR
"LIBCXX_ENABLE_FILESYSTEM cannot be turned on when LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY=OFF")
endif()
# Ensure LIBCXX_ENABLE_MONOTONIC_CLOCK is set to ON only when
# LIBCXX_ENABLE_THREADS is on.
if(LIBCXX_ENABLE_THREADS AND NOT LIBCXX_ENABLE_MONOTONIC_CLOCK)
message(FATAL_ERROR "LIBCXX_ENABLE_MONOTONIC_CLOCK can only be set to OFF"
" when LIBCXX_ENABLE_THREADS is also set to OFF.")
endif()
if(NOT LIBCXX_ENABLE_THREADS)
if(LIBCXX_HAS_PTHREAD_API)
message(FATAL_ERROR "LIBCXX_HAS_PTHREAD_API can only be set to ON"
" when LIBCXX_ENABLE_THREADS is also set to ON.")
endif()
if(LIBCXX_HAS_EXTERNAL_THREAD_API)
message(FATAL_ERROR "LIBCXX_HAS_EXTERNAL_THREAD_API can only be set to ON"
" when LIBCXX_ENABLE_THREADS is also set to ON.")
endif()
if (LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY)
message(FATAL_ERROR "LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY can only be set "
"to ON when LIBCXX_ENABLE_THREADS is also set to ON.")
endif()
endif()
if (LIBCXX_HAS_EXTERNAL_THREAD_API)
if (LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY)
message(FATAL_ERROR "The options LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY and "
"LIBCXX_HAS_EXTERNAL_THREAD_API cannot both be ON at "
"the same time")
endif()
if (LIBCXX_HAS_PTHREAD_API)
message(FATAL_ERROR "The options LIBCXX_HAS_EXTERNAL_THREAD_API"
"and LIBCXX_HAS_PTHREAD_API cannot be both"
"set to ON at the same time.")
endif()
endif()
# Ensure LLVM_USE_SANITIZER is not specified when LIBCXX_GENERATE_COVERAGE
# is ON.
if (LLVM_USE_SANITIZER AND LIBCXX_GENERATE_COVERAGE)
message(FATAL_ERROR "LLVM_USE_SANITIZER cannot be used with LIBCXX_GENERATE_COVERAGE")
endif()
# Set LIBCXX_BUILD_32_BITS to (LIBCXX_BUILD_32_BITS OR LLVM_BUILD_32_BITS)
# and check that we can build with 32 bits if requested.
if (CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32)
if (LIBCXX_BUILD_32_BITS AND NOT LLVM_BUILD_32_BITS) # Don't duplicate the output from LLVM
message(STATUS "Building 32 bits executables and libraries.")
endif()
elseif(LIBCXX_BUILD_32_BITS)
message(FATAL_ERROR "LIBCXX_BUILD_32_BITS=ON is not supported on this platform.")
endif()
# Check that this option is not enabled on Apple and emit a usage warning.
if (LIBCXX_ENABLE_STATIC_ABI_LIBRARY)
if (APPLE)
message(FATAL_ERROR "LIBCXX_ENABLE_STATIC_ABI_LIBRARY is not supported on OS X")
else()
message(WARNING "LIBCXX_ENABLE_STATIC_ABI_LIBRARY is an experimental option")
endif()
if (LIBCXX_ENABLE_STATIC AND NOT PYTHONINTERP_FOUND)
message(FATAL_ERROR "LIBCXX_ENABLE_STATIC_ABI_LIBRARY requires python but it was not found.")
endif()
endif()
if (LIBCXX_ENABLE_ABI_LINKER_SCRIPT)
if (APPLE)
message(FATAL_ERROR "LIBCXX_ENABLE_ABI_LINKER_SCRIPT cannot be used on APPLE targets")
endif()
if (NOT PYTHONINTERP_FOUND)
message(FATAL_ERROR "LIBCXX_ENABLE_ABI_LINKER_SCRIPT requires python but it was not found.")
endif()
if (NOT LIBCXX_ENABLE_SHARED)
message(FATAL_ERROR "LIBCXX_ENABLE_ABI_LINKER_SCRIPT is only available for shared library builds.")
endif()
endif()
if (LIBCXX_ENABLE_STATIC_ABI_LIBRARY AND LIBCXX_ENABLE_ABI_LINKER_SCRIPT)
message(FATAL_ERROR "Conflicting options given.
LIBCXX_ENABLE_STATIC_ABI_LIBRARY cannot be specified with
LIBCXX_ENABLE_ABI_LINKER_SCRIPT")
endif()
if (LIBCXX_HAS_MUSL_LIBC AND NOT LIBCXX_INSTALL_SUPPORT_HEADERS)
message(FATAL_ERROR "LIBCXX_INSTALL_SUPPORT_HEADERS can not be turned off"
"when building for Musl with LIBCXX_HAS_MUSL_LIBC.")
endif()
#===============================================================================
# Configure System
#===============================================================================
set(LIBCXX_COMPILER ${CMAKE_CXX_COMPILER})
set(LIBCXX_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
set(LIBCXX_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})
set(LIBCXX_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBCXX_LIBDIR_SUFFIX})
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${LIBCXX_LIBRARY_DIR})
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${LIBCXX_LIBRARY_DIR})
# Declare libc++ configuration variables.
# They are intended for use as follows:
# LIBCXX_CXX_FLAGS: General flags for both the compiler and linker.
# LIBCXX_COMPILE_FLAGS: Compile only flags.
# LIBCXX_LINK_FLAGS: Linker only flags.
# LIBCXX_LIBRARIES: libraries libc++ is linked to.
# LIBCXX_INTERFACE_LIBRARIES: Libraries that must be linked when using libc++
# These libraries are exposed in the linker script.
set(LIBCXX_COMPILE_FLAGS "")
set(LIBCXX_LINK_FLAGS "")
set(LIBCXX_LIBRARIES "")
set(LIBCXX_INTERFACE_LIBRARIES "")
# Include macros for adding and removing libc++ flags.
include(HandleLibcxxFlags)
# Target flags ================================================================
# These flags get added to CMAKE_CXX_FLAGS and CMAKE_C_FLAGS so that
# 'config-ix' use them during feature checks. It also adds them to both
# 'LIBCXX_COMPILE_FLAGS' and 'LIBCXX_LINK_FLAGS'
add_target_flags_if(LIBCXX_BUILD_32_BITS "-m32")
add_target_flags_if(LIBCXX_TARGET_TRIPLE "-target ${LIBCXX_TARGET_TRIPLE}")
add_target_flags_if(LIBCXX_SYSROOT "--sysroot=${LIBCXX_SYSROOT}")
add_target_flags_if(LIBCXX_GCC_TOOLCHAIN "-gcc-toolchain ${LIBCXX_GCC_TOOLCHAIN}")
if (LIBCXX_TARGET_TRIPLE)
set(TARGET_TRIPLE "${LIBCXX_TARGET_TRIPLE}")
endif()
# Configure compiler.
include(config-ix)
if (LIBCXX_USE_COMPILER_RT)
list(APPEND LIBCXX_LINK_FLAGS "-rtlib=compiler-rt")
endif()
# Configure coverage options.
if (LIBCXX_GENERATE_COVERAGE)
include(CodeCoverage)
set(CMAKE_BUILD_TYPE "COVERAGE" CACHE STRING "" FORCE)
endif()
string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)
#===============================================================================
# Setup Compiler Flags
#===============================================================================
include(HandleLibCXXABI) # Setup the ABI library flags
if (NOT LIBCXX_STANDALONE_BUILD)
# Remove flags that may have snuck in.
remove_flags(-DNDEBUG -UNDEBUG -D_DEBUG
-lc++abi -m32)
endif()
remove_flags(-stdlib=libc++ -stdlib=libstdc++)
# FIXME(EricWF): See the FIXME on LIBCXX_ENABLE_PEDANTIC.
# Remove the -pedantic flag and -Wno-pedantic and -pedantic-errors
# so they don't get transformed into -Wno and -errors respectivly.
remove_flags(-Wno-pedantic -pedantic-errors -pedantic)
# Required flags ==============================================================
set(LIBCXX_STANDARD_VER c++11 CACHE INTERNAL "internal option to change build dialect")
if (LIBCXX_HAS_MUSL_LIBC)
# musl's pthread implementations uses volatile types in their structs which is
# not a constexpr in C++11 but is in C++14, so we use C++14 with musl.
set(LIBCXX_STANDARD_VER c++14 CACHE INTERNAL "internal option to change build dialect")
endif()
add_compile_flags_if_supported(-std=${LIBCXX_STANDARD_VER})
mangle_name("LIBCXX_SUPPORTS_STD_EQ_${LIBCXX_STANDARD_VER}_FLAG" SUPPORTS_DIALECT_NAME)
if(NOT ${SUPPORTS_DIALECT_NAME})
if(NOT "${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC" AND NOT "${CMAKE_CXX_SIMULATE_ID}" STREQUAL "MSVC")
message(FATAL_ERROR "C++11 or greater is required but the compiler does not support ${LIBCXX_STANDARD_VER}")
endif()
endif()
# On all systems the system c++ standard library headers need to be excluded.
# MSVC only has -X, which disables all default includes; including the crt.
# Thus, we do nothing and hope we don't accidentally include any of the C++
# headers
add_compile_flags_if_supported(-nostdinc++)
# Hide all inline function definitions which have not explicitly been marked
# visible. This prevents new definitions for inline functions from appearing in
# the dylib when get ODR used by another function.
add_compile_flags_if_supported(-fvisibility-inlines-hidden)
# Let the library headers know they are currently being used to build the
# library.
add_definitions(-D_LIBCPP_BUILDING_LIBRARY)
# Warning flags ===============================================================
add_definitions(-D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
add_compile_flags_if_supported(
-Wall -Wextra -W -Wwrite-strings
-Wno-unused-parameter -Wno-long-long
-Werror=return-type)
if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
add_compile_flags_if_supported(
-Wno-user-defined-literals
-Wno-covered-switch-default)
elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU")
add_compile_flags_if_supported(
-Wno-literal-suffix
-Wno-c++14-compat)
endif()
if (LIBCXX_ENABLE_WERROR)
add_compile_flags_if_supported(-Werror)
add_compile_flags_if_supported(-WX)
else()
# TODO(EricWF) Remove this. We shouldn't be suppressing errors when -Werror is
# added elsewhere.
add_compile_flags_if_supported(-Wno-error)
endif()
if (LIBCXX_ENABLE_PEDANTIC)
add_compile_flags_if_supported(-pedantic)
endif()
if (LIBCXX_DISABLE_MACRO_CONFLICT_WARNINGS)
add_definitions(-D_LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS)
endif()
# Exception flags =============================================================
if (LIBCXX_ENABLE_EXCEPTIONS)
# Catches C++ exceptions only and tells the compiler to assume that extern C
# functions never throw a C++ exception.
add_compile_flags_if_supported(-EHsc)
else()
add_definitions(-D_LIBCPP_NO_EXCEPTIONS)
add_compile_flags_if_supported(-EHs- -EHa-)
add_compile_flags_if_supported(-fno-exceptions)
endif()
# RTTI flags ==================================================================
if (NOT LIBCXX_ENABLE_RTTI)
add_definitions(-D_LIBCPP_NO_RTTI)
add_compile_flags_if_supported(-GR-)
add_compile_flags_if_supported(-fno-rtti)
endif()
# Threading flags =============================================================
if (LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY AND LIBCXX_ENABLE_SHARED)
# Need to allow unresolved symbols if this is to work with shared library builds
if (APPLE)
add_link_flags("-undefined dynamic_lookup")
else()
# Relax this restriction from HandleLLVMOptions
string(REPLACE "-Wl,-z,defs" "" CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS}")
endif()
endif()
# Assertion flags =============================================================
define_if(LIBCXX_ENABLE_ASSERTIONS -UNDEBUG)
define_if_not(LIBCXX_ENABLE_ASSERTIONS -DNDEBUG)
if (LIBCXX_ENABLE_ASSERTIONS)
# MSVC doesn't like _DEBUG on release builds. See PR 4379.
define_if_not(MSVC -D_DEBUG)
endif()
# Modules flags ===============================================================
# FIXME The libc++ sources are fundamentally non-modular. They need special
# versions of the headers in order to provide C++03 and legacy ABI definitions.
# NOTE: The public headers can be used with modules in all other contexts.
if (LLVM_ENABLE_MODULES)
# Ignore that the rest of the modules flags are now unused.
add_compile_flags_if_supported(-Wno-unused-command-line-argument)
add_compile_flags(-fno-modules)
endif()
# Sanitizer flags =============================================================
# Configure for sanitizers. If LIBCXX_STANDALONE_BUILD then we have to do
# the flag translation ourselves. Othewise LLVM's CMakeList.txt will handle it.
if (LIBCXX_STANDALONE_BUILD)
set(LLVM_USE_SANITIZER "" CACHE STRING
"Define the sanitizer used to build the library and tests")
# NOTE: LLVM_USE_SANITIZER checks for a UNIX like system instead of MSVC.
# But we don't have LLVM_ON_UNIX so checking for MSVC is the best we can do.
if (LLVM_USE_SANITIZER AND NOT MSVC)
add_flags_if_supported("-fno-omit-frame-pointer")
add_flags_if_supported("-gline-tables-only")
if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" AND
NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELWITHDEBINFO")
add_flags_if_supported("-gline-tables-only")
endif()
if (LLVM_USE_SANITIZER STREQUAL "Address")
add_flags("-fsanitize=address")
elseif (LLVM_USE_SANITIZER MATCHES "Memory(WithOrigins)?")
add_flags(-fsanitize=memory)
if (LLVM_USE_SANITIZER STREQUAL "MemoryWithOrigins")
add_flags("-fsanitize-memory-track-origins")
endif()
elseif (LLVM_USE_SANITIZER STREQUAL "Undefined")
add_flags("-fsanitize=undefined -fno-sanitize=vptr,function -fno-sanitize-recover=all")
elseif (LLVM_USE_SANITIZER STREQUAL "Thread")
add_flags(-fsanitize=thread)
else()
message(WARNING "Unsupported value of LLVM_USE_SANITIZER: ${LLVM_USE_SANITIZER}")
endif()
elseif(LLVM_USE_SANITIZER AND MSVC)
message(WARNING "LLVM_USE_SANITIZER is not supported on this platform.")
endif()
endif()
# Configuration file flags =====================================================
if (NOT LIBCXX_ABI_VERSION EQUAL "1")
config_define(${LIBCXX_ABI_VERSION} _LIBCPP_ABI_VERSION)
endif()
config_define_if(LIBCXX_ABI_UNSTABLE _LIBCPP_ABI_UNSTABLE)
config_define_if_not(LIBCXX_ENABLE_GLOBAL_FILESYSTEM_NAMESPACE _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE)
config_define_if_not(LIBCXX_ENABLE_STDIN _LIBCPP_HAS_NO_STDIN)
config_define_if_not(LIBCXX_ENABLE_STDOUT _LIBCPP_HAS_NO_STDOUT)
config_define_if_not(LIBCXX_ENABLE_THREADS _LIBCPP_HAS_NO_THREADS)
config_define_if_not(LIBCXX_ENABLE_MONOTONIC_CLOCK _LIBCPP_HAS_NO_MONOTONIC_CLOCK)
config_define_if_not(LIBCXX_ENABLE_THREAD_UNSAFE_C_FUNCTIONS _LIBCPP_HAS_NO_THREAD_UNSAFE_C_FUNCTIONS)
config_define_if(LIBCXX_HAS_PTHREAD_API _LIBCPP_HAS_THREAD_API_PTHREAD)
config_define_if(LIBCXX_HAS_EXTERNAL_THREAD_API _LIBCPP_HAS_THREAD_API_EXTERNAL)
config_define_if(LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY _LIBCPP_HAS_THREAD_LIBRARY_EXTERNAL)
config_define_if(LIBCXX_HAS_MUSL_LIBC _LIBCPP_HAS_MUSL_LIBC)
# By default libc++ on Windows expects to use a shared library, which requires
# the headers to use DLL import/export semantics. However when building a
# static library only we modify the headers to disable DLL import/export.
if (DEFINED WIN32 AND LIBCXX_ENABLE_STATIC AND NOT LIBCXX_ENABLE_SHARED)
message(STATUS "Generating custom __config for non-DLL Windows build")
config_define(ON _LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
endif()
if (LIBCXX_NEEDS_SITE_CONFIG)
configure_file("include/__config_site.in"
"${LIBCXX_BINARY_DIR}/__config_site"
@ONLY)
# Provide the config definitions by included the generated __config_site
# file at compile time.
if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC" OR "${CMAKE_CXX_SIMULATE_ID}" STREQUAL "MSVC")
add_compile_flags("/FI\"${LIBCXX_BINARY_DIR}/__config_site\"")
else()
add_compile_flags("-include ${LIBCXX_BINARY_DIR}/__config_site")
endif()
endif()
#===============================================================================
# Setup Source Code And Tests
#===============================================================================
include_directories(include)
add_subdirectory(include)
add_subdirectory(lib)
if (LIBCXX_INCLUDE_BENCHMARKS)
add_subdirectory(benchmarks)
endif()
if (LIBCXX_INCLUDE_TESTS)
add_subdirectory(test)
add_subdirectory(lib/abi)
endif()
if (LIBCXX_INCLUDE_DOCS)
add_subdirectory(docs)
endif()
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