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# See www/CMake.html for instructions on how to build libcxx with CMake.
#===============================================================================
# Setup Project
#===============================================================================
project(libcxx CXX C)
cmake_minimum_required(VERSION 2.8)
set(PACKAGE_NAME libcxx)
set(PACKAGE_VERSION trunk-svn)
set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}")
set(PACKAGE_BUGREPORT "llvmbugs@cs.uiuc.edu")
# Add path for custom modules
set(CMAKE_MODULE_PATH
${CMAKE_MODULE_PATH}
"${CMAKE_CURRENT_SOURCE_DIR}/cmake"
"${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules"
)
# Require out of source build.
include(MacroEnsureOutOfSourceBuild)
MACRO_ENSURE_OUT_OF_SOURCE_BUILD(
"${PROJECT_NAME} requires an out of source build. Please create a separate
build directory and run 'cmake /path/to/${PROJECT_NAME} [options]' there."
)
#===============================================================================
# Setup CMake Options
#===============================================================================
# Define options.
option(LIBCXX_ENABLE_EXCEPTIONS "Use exceptions." ON)
option(LIBCXX_ENABLE_RTTI "Use run time type information." ON)
option(LIBCXX_ENABLE_ASSERTIONS "Enable assertions independent of build mode." ON)
option(LIBCXX_ENABLE_PEDANTIC "Compile with pedantic enabled." ON)
option(LIBCXX_ENABLE_WERROR "Fail and stop if a warning is triggered." OFF)
option(LIBCXX_ENABLE_CXX0X "Enable -std=c++0x and use of c++0x language features if the compiler supports it." ON)
option(LIBCXX_ENABLE_SHARED "Build libc++ as a shared library." ON)
set(CXXABIS none libcxxabi libcxxrt libsupc++)
if (NOT DEFINED LIBCXX_CXX_ABI)
set(LIBCXX_CXX_ABI "none")
endif()
set(LIBCXX_CXX_ABI "${LIBCXX_CXX_ABI}" CACHE STRING
"Specify C++ ABI library to use." FORCE)
set_property(CACHE LIBCXX_CXX_ABI PROPERTY STRINGS "";${CXXABIS})
#===============================================================================
# Configure System
#===============================================================================
# Get triples.
include(GetTriple)
get_host_triple(LIBCXX_HOST_TRIPLE
LIBCXX_HOST_ARCH
LIBCXX_HOST_VENDOR
LIBCXX_HOST_OS
)
set(LIBCXX_HOST_TRIPLE ${LIBCXX_HOST_TRIPLE} CACHE STRING "Host triple.")
get_target_triple(LIBCXX_TARGET_TRIPLE
LIBCXX_TARGET_ARCH
LIBCXX_TARGET_VENDOR
LIBCXX_TARGET_OS
)
set(LIBCXX_TARGET_TRIPLE ${LIBCXX_TARGET_TRIPLE} CACHE STRING "Target triple.")
if ("${LIBCXX_CXX_ABI}" STREQUAL "libsupc++")
Howard Hinnant
committed
add_definitions(-D__GLIBCXX__)
set(LIBCXX_LIBSUPCXX_INCLUDE_PATHS "${LIBCXX_LIBSUPCXX_INCLUDE_PATHS}"
CACHE STRINGS
"Paths to libsupc++ include directories separate by ';'.")
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committed
set(LIBCXX_CXX_ABI_LIBRARIES supc++)
set(LIBCXX_LIBSUPCXX_FILES
cxxabi.h
bits/c++config.h
bits/os_defines.h
bits/cpu_defines.h
bits/cxxabi_tweaks.h
bits/cxxabi_forced.h
)
# Create include directories.
file(MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/include")
file(MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/include/bits")
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set(LIBCXX_LIBSUPCXX_FILE_PATHS)
foreach(path ${LIBCXX_LIBSUPCXX_FILES})
set(found FALSE)
foreach(incpath ${LIBCXX_LIBSUPCXX_INCLUDE_PATHS})
if (EXISTS "${incpath}/${path}")
set(found TRUE)
get_filename_component(dstdir ${path} PATH)
get_filename_component(file ${path} NAME)
add_custom_command(
OUTPUT "${CMAKE_BINARY_DIR}/include/${dstdir}/${file}"
COMMAND ${CMAKE_COMMAND} -E copy_if_different
"${incpath}/${path}"
"${CMAKE_BINARY_DIR}/include/${dstdir}"
MAIN_DEPENDENCY "${incpath}/${path}"
)
list(APPEND LIBCXX_CXX_ABI_DEPS
"${CMAKE_BINARY_DIR}/include/${dstdir}/${file}")
endif()
endforeach()
if (NOT found)
message(FATAL_ERROR "Failed to find ${path}")
endif()
endforeach()
add_custom_target(supcxx_headers DEPENDS ${LIBCXX_CXX_ABI_DEPS})
set(LIBCXX_CXX_ABI_DEPS supcxx_headers)
include_directories("${CMAKE_BINARY_DIR}/include")
install(DIRECTORY "${CMAKE_BINARY_DIR}/include/"
DESTINATION include/c++/v1
FILES_MATCHING
PATTERN "*"
)
elseif (NOT "${LIBCXX_CXX_ABI}" STREQUAL "none")
message(FATAL_ERROR
"Currently only none and libsupc++ are supported for c++ abi.")
endif ()
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# Configure compiler.
include(config-ix)
#===============================================================================
# Setup Compiler Flags
#===============================================================================
# Get required flags.
# On all systems the system c++ standard library headers need to be excluded.
if (MSVC)
# 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.
else()
if (LIBCXX_HAS_NOSTDINCXX_FLAG)
set(LIBCXX_CXX_REQUIRED_FLAGS -nostdinc++)
endif()
if (LIBCXX_ENABLE_CXX0X AND LIBCXX_HAS_STDCXX0X_FLAG)
list(APPEND LIBCXX_CXX_REQUIRED_FLAGS -std=c++0x)
endif()
endif()
macro(append_if list condition var)
if (${condition})
list(APPEND ${list} ${var})
endif()
endmacro()
# Get warning flags
append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WALL_FLAG -Wall)
append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_W_FLAG -W)
append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WNO_UNUSED_PARAMETER_FLAG -Wno-unused-parameter)
append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WWRITE_STRINGS_FLAG -Wwrite-strings)
append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WNO_LONG_LONG_FLAG -Wno-long-long)
if (LIBCXX_ENABLE_WERROR)
append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WERROR_FLAG -Werror)
append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WX_FLAG -WX)
endif()
if (LIBCXX_ENABLE_PEDANTIC)
append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_PEDANTIC_FLAG -pedantic)
endif()
# Get feature flags.
# Exceptions
if (LIBCXX_ENABLE_EXCEPTIONS)
# Catches C++ exceptions only and tells the compiler to assume that extern C
# functions never throw a C++ exception.
append_if(LIBCXX_CXX_FEATURE_FLAGS LIBCXX_HAS_EHSC_FLAG -EHsc)
else()
list(APPEND LIBCXX_CXX_FEATURE_FLAGS -D_LIBCPP_NO_EXCEPTIONS)
append_if(LIBCXX_CXX_FEATURE_FLAGS LIBCXX_HAS_NO_EHS_FLAG -EHs-)
append_if(LIBCXX_CXX_FEATURE_FLAGS LIBCXX_HAS_NO_EHA_FLAG -EHa-)
append_if(LIBCXX_CXX_FEATURE_FLAGS LIBCXX_HAS_FNO_EXCEPTIONS_FLAG -fno-exceptions)
endif()
# RTTI
if (NOT LIBCXX_ENABLE_RTTI)
list(APPEND LIBCXX_CXX_FEATURE_FLAGS -D_LIBCPP_NO_RTTI)
append_if(LIBCXX_CXX_FEATURE_FLAGS LIBCXX_HAS_NO_GR_FLAG -GR-)
append_if(LIBCXX_CXX_FEATURE_FLAGS LIBCXX_HAS_FNO_RTTI_FLAG -fno-rtti)
endif()
# Assert
Howard Hinnant
committed
string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)
if (LIBCXX_ENABLE_ASSERTIONS)
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# MSVC doesn't like _DEBUG on release builds. See PR 4379.
if (NOT MSVC)
list(APPEND LIBCXX_CXX_FEATURE_FLAGS -D_DEBUG)
endif()
# On Release builds cmake automatically defines NDEBUG, so we
# explicitly undefine it:
if (uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE")
list(APPEND LIBCXX_CXX_FEATURE_FLAGS -UNDEBUG)
endif()
else()
if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE")
list(APPEND LIBCXX_CXX_FEATURE_FLAGS -DNDEBUG)
endif()
endif()
# This is the _ONLY_ place where add_definitions is called.
add_definitions(
${LIBCXX_CXX_REQUIRED_FLAGS}
${LIBCXX_CXX_WARNING_FLAGS}
${LIBCXX_CXX_FEATURE_FLAGS}
)
#===============================================================================
# Setup Source Code
#===============================================================================
include_directories(include)
# Add source code. This also contains all of the logic for deciding linker flags
# soname, etc...
add_subdirectory(lib)
#===============================================================================
# Setup Tests
#===============================================================================
add_subdirectory(test)