1 # See www/CMake.html for instructions on how to build libcxx with CMake. 2 3 #=============================================================================== 4 # Setup Project 5 #=============================================================================== 6 7 project(libcxx CXX C) 8 cmake_minimum_required(VERSION 2.8) 9 10 set(PACKAGE_NAME libcxx) 11 set(PACKAGE_VERSION trunk-svn) 12 set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}") 13 set(PACKAGE_BUGREPORT "llvmbugs (a] cs.uiuc.edu") 14 15 # Add path for custom modules 16 set(CMAKE_MODULE_PATH 17 "${CMAKE_CURRENT_SOURCE_DIR}/cmake" 18 "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules" 19 ${CMAKE_MODULE_PATH} 20 ) 21 22 # Require out of source build. 23 include(MacroEnsureOutOfSourceBuild) 24 MACRO_ENSURE_OUT_OF_SOURCE_BUILD( 25 "${PROJECT_NAME} requires an out of source build. Please create a separate 26 build directory and run 'cmake /path/to/${PROJECT_NAME} [options]' there." 27 ) 28 29 if(CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR) 30 set(LIBCXX_BUILT_STANDALONE 1) 31 endif() 32 33 #=============================================================================== 34 # Setup CMake Options 35 #=============================================================================== 36 37 # Define options. 38 option(LIBCXX_ENABLE_EXCEPTIONS "Use exceptions." ON) 39 option(LIBCXX_ENABLE_RTTI "Use run time type information." ON) 40 option(LIBCXX_ENABLE_ASSERTIONS "Enable assertions independent of build mode." ON) 41 option(LIBCXX_ENABLE_PEDANTIC "Compile with pedantic enabled." ON) 42 option(LIBCXX_ENABLE_WERROR "Fail and stop if a warning is triggered." OFF) 43 option(LIBCXX_ENABLE_CXX0X "Enable -std=c++0x and use of c++0x language features if the compiler supports it." ON) 44 option(LIBCXX_ENABLE_SHARED "Build libc++ as a shared library." ON) 45 option(LIBCXX_INSTALL_SUPPORT_HEADERS "Install libc++ support headers." ON) 46 47 set(CXXABIS none libcxxabi libcxxrt libstdc++ libsupc++) 48 if (NOT DEFINED LIBCXX_CXX_ABI) 49 set(LIBCXX_CXX_ABI "none") 50 endif() 51 set(LIBCXX_CXX_ABI "${LIBCXX_CXX_ABI}" CACHE STRING 52 "Specify C++ ABI library to use." FORCE) 53 set_property(CACHE LIBCXX_CXX_ABI PROPERTY STRINGS ;${CXXABIS}) 54 55 #=============================================================================== 56 # Configure System 57 #=============================================================================== 58 59 # Get triples. 60 include(GetTriple) 61 get_host_triple(LIBCXX_HOST_TRIPLE 62 LIBCXX_HOST_ARCH 63 LIBCXX_HOST_VENDOR 64 LIBCXX_HOST_OS 65 ) 66 set(LIBCXX_HOST_TRIPLE ${LIBCXX_HOST_TRIPLE} CACHE STRING "Host triple.") 67 get_target_triple(LIBCXX_TARGET_TRIPLE 68 LIBCXX_TARGET_ARCH 69 LIBCXX_TARGET_VENDOR 70 LIBCXX_TARGET_OS 71 ) 72 set(LIBCXX_TARGET_TRIPLE ${LIBCXX_TARGET_TRIPLE} CACHE STRING "Target triple.") 73 74 #=============================================================================== 75 # Add an ABI library if appropriate 76 #=============================================================================== 77 78 # 79 # _setup_abi: Set up the build to use an ABI library 80 # 81 # Parameters: 82 # abidefines: A list of defines needed to compile libc++ with the ABI library 83 # abilibs : A list of libraries to link against 84 # abifiles : A list of files (which may be relative paths) to copy into the 85 # libc++ build tree for the build. These files will also be 86 # installed alongside the libc++ headers. 87 # abidirs : A list of relative paths to create under an include directory 88 # in the libc++ build directory. 89 # 90 macro(setup_abi_lib abipathvar abidefines abilibs abifiles abidirs) 91 list(APPEND LIBCXX_CXX_FEATURE_FLAGS ${abidefines}) 92 set(${abipathvar} "${${abipathvar}}" 93 CACHE STRINGS 94 "Paths to ABI include directories separate by ';'." 95 ) 96 set(LIBCXX_CXX_ABI_LIBRARIES ${abilibs}) 97 set(LIBCXX_ABILIB_FILES ${abifiles}) 98 file(MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/include") 99 foreach(_d ${abidirs}) 100 file(MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/include/${_d}") 101 endforeach() 102 set(LIBCXX_ABILIB_FILE_PATHS) 103 foreach(fpath ${LIBCXX_ABILIB_FILES}) 104 set(found FALSE) 105 foreach(incpath ${${abipathvar}}) 106 if (EXISTS "${incpath}/${fpath}") 107 set(found TRUE) 108 get_filename_component(dstdir ${fpath} PATH) 109 get_filename_component(ifile ${fpath} NAME) 110 add_custom_command( 111 OUTPUT "${CMAKE_BINARY_DIR}/include/${dstdir}/${ifile}" 112 COMMAND ${CMAKE_COMMAND} -E copy_if_different 113 "${incpath}/${fpath}" 114 "${CMAKE_BINARY_DIR}/include/${dstdir}" 115 MAIN_DEPENDENCY "${incpath}/${fpath}" 116 ) 117 list(APPEND LIBCXX_CXX_ABI_DEPS 118 "${CMAKE_BINARY_DIR}/include/${dstdir}/${ifile}" 119 ) 120 endif() 121 endforeach() 122 if (NOT found) 123 message(FATAL_ERROR "Failed to find ${fpath}") 124 endif() 125 endforeach() 126 add_custom_target(abilib_headers DEPENDS ${LIBCXX_CXX_ABI_DEPS}) 127 set(LIBCXX_CXX_ABI_DEPS abilib_headers) 128 include_directories("${CMAKE_BINARY_DIR}/include") 129 install(DIRECTORY "${CMAKE_BINARY_DIR}/include/" 130 DESTINATION include/c++/v1 131 FILES_MATCHING 132 PATTERN "*" 133 ) 134 endmacro() 135 136 if ("${LIBCXX_CXX_ABI}" STREQUAL "libstdc++" OR 137 "${LIBCXX_CXX_ABI}" STREQUAL "libsupc++") 138 set(_LIBSUPCXX_INCLUDE_FILES 139 cxxabi.h bits/c++config.h bits/os_defines.h bits/cpu_defines.h 140 bits/cxxabi_tweaks.h bits/cxxabi_forced.h 141 ) 142 if ("${LIBCXX_CXX_ABI}" STREQUAL "libstdc++") 143 set(_LIBSUPCXX_DEFINES "-DLIBSTDCXX") 144 set(_LIBSUPCXX_LIBNAME stdc++) 145 else() 146 set(_LIBSUPCXX_DEFINES "") 147 set(_LIBSUPCXX_LIBNAME supc++) 148 endif() 149 setup_abi_lib("LIBCXX_LIBSUPCXX_INCLUDE_PATHS" 150 "-D__GLIBCXX__ ${_LIBSUPCXX_DEFINES}" 151 "${_LIBSUPCXX_LIBNAME}" "${_LIBSUPCXX_INCLUDE_FILES}" "bits" 152 ) 153 elseif ("${LIBCXX_CXX_ABI}" STREQUAL "libcxxabi") 154 setup_abi_lib("LIBCXX_LIBCXXABI_INCLUDE_PATHS" "" 155 "c++abi" "cxxabi.h" "" 156 ) 157 elseif ("${LIBCXX_CXX_ABI}" STREQUAL "libcxxrt") 158 setup_abi_lib("LIBCXX_LIBCXXRT_INCLUDE_PATHS" "-DLIBCXXRT" 159 "cxxrt" "cxxabi.h;unwind.h;unwind-arm.h;unwind-itanium.h" "" 160 ) 161 elseif (NOT "${LIBCXX_CXX_ABI}" STREQUAL "none") 162 message(FATAL_ERROR 163 "Currently libstdc++, libsupc++, libcxxabi, libcxxrt and none are " 164 "supported for c++ abi." 165 ) 166 endif () 167 168 # Configure compiler. 169 include(config-ix) 170 171 #=============================================================================== 172 # Setup Compiler Flags 173 #=============================================================================== 174 175 # Get required flags. 176 # On all systems the system c++ standard library headers need to be excluded. 177 if (MSVC) 178 # MSVC only has -X, which disables all default includes; including the crt. 179 # Thus, we do nothing and hope we don't accidentally include any of the C++ 180 # headers. 181 else() 182 if (LIBCXX_HAS_NOSTDINCXX_FLAG) 183 list(APPEND LIBCXX_CXX_REQUIRED_FLAGS -nostdinc++) 184 endif() 185 if (LIBCXX_ENABLE_CXX0X AND LIBCXX_HAS_STDCXX0X_FLAG) 186 list(APPEND LIBCXX_CXX_REQUIRED_FLAGS -std=c++0x) 187 endif() 188 endif() 189 190 macro(append_if list condition var) 191 if (${condition}) 192 list(APPEND ${list} ${var}) 193 endif() 194 endmacro() 195 196 # Get warning flags 197 if (NOT MSVC) 198 append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WALL_FLAG -Wall) 199 list(APPEND LIBCXX_CXX_REQUIRED_FLAGS -Werror=return-type) 200 endif() 201 202 append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_W_FLAG -W) 203 append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WNO_UNUSED_PARAMETER_FLAG -Wno-unused-parameter) 204 append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WWRITE_STRINGS_FLAG -Wwrite-strings) 205 append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WNO_LONG_LONG_FLAG -Wno-long-long) 206 if (LIBCXX_ENABLE_WERROR) 207 append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WERROR_FLAG -Werror) 208 append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WX_FLAG -WX) 209 else() 210 append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WNO_ERROR_FLAG -Wno-error) 211 append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_NO_WX_FLAG -WX-) 212 endif() 213 if (LIBCXX_ENABLE_PEDANTIC) 214 append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_PEDANTIC_FLAG -pedantic) 215 endif() 216 217 # Get feature flags. 218 # Exceptions 219 if (LIBCXX_ENABLE_EXCEPTIONS) 220 # Catches C++ exceptions only and tells the compiler to assume that extern C 221 # functions never throw a C++ exception. 222 append_if(LIBCXX_CXX_FEATURE_FLAGS LIBCXX_HAS_EHSC_FLAG -EHsc) 223 else() 224 list(APPEND LIBCXX_CXX_FEATURE_FLAGS -D_LIBCPP_NO_EXCEPTIONS) 225 append_if(LIBCXX_CXX_FEATURE_FLAGS LIBCXX_HAS_NO_EHS_FLAG -EHs-) 226 append_if(LIBCXX_CXX_FEATURE_FLAGS LIBCXX_HAS_NO_EHA_FLAG -EHa-) 227 append_if(LIBCXX_CXX_FEATURE_FLAGS LIBCXX_HAS_FNO_EXCEPTIONS_FLAG -fno-exceptions) 228 endif() 229 # RTTI 230 if (NOT LIBCXX_ENABLE_RTTI) 231 list(APPEND LIBCXX_CXX_FEATURE_FLAGS -D_LIBCPP_NO_RTTI) 232 append_if(LIBCXX_CXX_FEATURE_FLAGS LIBCXX_HAS_NO_GR_FLAG -GR-) 233 append_if(LIBCXX_CXX_FEATURE_FLAGS LIBCXX_HAS_FNO_RTTI_FLAG -fno-rtti) 234 endif() 235 # Assert 236 string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE) 237 if (LIBCXX_ENABLE_ASSERTIONS) 238 # MSVC doesn't like _DEBUG on release builds. See PR 4379. 239 if (NOT MSVC) 240 list(APPEND LIBCXX_CXX_FEATURE_FLAGS -D_DEBUG) 241 endif() 242 # On Release builds cmake automatically defines NDEBUG, so we 243 # explicitly undefine it: 244 if (uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE") 245 list(APPEND LIBCXX_CXX_FEATURE_FLAGS -UNDEBUG) 246 endif() 247 else() 248 if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE") 249 list(APPEND LIBCXX_CXX_FEATURE_FLAGS -DNDEBUG) 250 endif() 251 endif() 252 # Static library 253 if (NOT LIBCXX_ENABLE_SHARED) 254 list(APPEND LIBCXX_CXX_FEATURE_FLAGS -D_LIBCPP_BUILD_STATIC) 255 endif() 256 257 # This is the _ONLY_ place where add_definitions is called. 258 if (MSVC) 259 add_definitions(-D_CRT_SECURE_NO_WARNINGS) 260 endif() 261 262 string(REPLACE ";" " " LIBCXX_CXX_REQUIRED_FLAGS "${LIBCXX_CXX_REQUIRED_FLAGS}") 263 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${LIBCXX_CXX_REQUIRED_FLAGS}") 264 265 string(REPLACE ";" " " LIBCXX_CXX_WARNING_FLAGS "${LIBCXX_CXX_WARNING_FLAGS}") 266 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${LIBCXX_CXX_WARNING_FLAGS}") 267 268 string(REPLACE ";" " " LIBCXX_CXX_FEATURE_FLAGS "${LIBCXX_CXX_FEATURE_FLAGS}") 269 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${LIBCXX_CXX_FEATURE_FLAGS}") 270 271 #=============================================================================== 272 # Setup Source Code 273 #=============================================================================== 274 275 include_directories(include) 276 add_subdirectory(include) 277 278 # Add source code. This also contains all of the logic for deciding linker flags 279 # soname, etc... 280 add_subdirectory(lib) 281 282 #=============================================================================== 283 # Setup Tests 284 #=============================================================================== 285 286 add_subdirectory(test) 287
