Michael J. Spencer | 626916f | 2010-12-10 19:47:54 +0000 | [diff] [blame] | 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@cs.uiuc.edu") |
| 14 | |
| 15 | # Add path for custom modules |
| 16 | set(CMAKE_MODULE_PATH |
| 17 | ${CMAKE_MODULE_PATH} |
| 18 | "${CMAKE_CURRENT_SOURCE_DIR}/cmake" |
| 19 | "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules" |
| 20 | ) |
| 21 | |
| 22 | # Require out of source build. |
| 23 | include(MacroEnsureOutOfSourceBuild) |
| 24 | MACRO_ENSURE_OUT_OF_SOURCE_BUILD( |
| 25 | "${PROJECT_NAME} requires an out of source build. Please create a separate |
| 26 | build directory and run 'cmake /path/to/${PROJECT_NAME} [options]' there." |
| 27 | ) |
| 28 | |
| 29 | #=============================================================================== |
| 30 | # Setup CMake Options |
| 31 | #=============================================================================== |
| 32 | |
| 33 | # Define options. |
| 34 | option(LIBCXX_ENABLE_EXCEPTIONS "Use exceptions." ON) |
| 35 | option(LIBCXX_ENABLE_RTTI "Use run time type information." ON) |
| 36 | option(LIBCXX_ENABLE_ASSERTIONS "Enable assertions independent of build mode." ON) |
| 37 | option(LIBCXX_ENABLE_PEDANTIC "Compile with pedantic enabled." ON) |
| 38 | option(LIBCXX_ENABLE_WERROR "Fail and stop if a warning is triggered." OFF) |
| 39 | option(LIBCXX_ENABLE_CXX0X "Enable -std=c++0x and use of c++0x language features if the compiler supports it." ON) |
| 40 | option(LIBCXX_ENABLE_SHARED "Build libc++ as a shared library." ON) |
| 41 | |
Michael J. Spencer | a358fbe | 2012-11-30 21:02:29 +0000 | [diff] [blame] | 42 | set(CXXABIS none libcxxabi libcxxrt libsupc++) |
Michael J. Spencer | db8a030 | 2012-12-31 19:34:21 +0000 | [diff] [blame^] | 43 | if (NOT DEFINED LIBCXX_CXX_ABI) |
| 44 | set(LIBCXX_CXX_ABI "none") |
| 45 | endif() |
Michael J. Spencer | a358fbe | 2012-11-30 21:02:29 +0000 | [diff] [blame] | 46 | set(LIBCXX_CXX_ABI "${LIBCXX_CXX_ABI}" CACHE STRING |
| 47 | "Specify C++ ABI library to use." FORCE) |
| 48 | set_property(CACHE LIBCXX_CXX_ABI PROPERTY STRINGS "";${CXXABIS}) |
| 49 | |
Michael J. Spencer | 626916f | 2010-12-10 19:47:54 +0000 | [diff] [blame] | 50 | #=============================================================================== |
| 51 | # Configure System |
| 52 | #=============================================================================== |
| 53 | |
| 54 | # Get triples. |
| 55 | include(GetTriple) |
| 56 | get_host_triple(LIBCXX_HOST_TRIPLE |
| 57 | LIBCXX_HOST_ARCH |
| 58 | LIBCXX_HOST_VENDOR |
| 59 | LIBCXX_HOST_OS |
| 60 | ) |
| 61 | set(LIBCXX_HOST_TRIPLE ${LIBCXX_HOST_TRIPLE} CACHE STRING "Host triple.") |
| 62 | get_target_triple(LIBCXX_TARGET_TRIPLE |
| 63 | LIBCXX_TARGET_ARCH |
| 64 | LIBCXX_TARGET_VENDOR |
| 65 | LIBCXX_TARGET_OS |
| 66 | ) |
| 67 | set(LIBCXX_TARGET_TRIPLE ${LIBCXX_TARGET_TRIPLE} CACHE STRING "Target triple.") |
| 68 | |
Michael J. Spencer | db8a030 | 2012-12-31 19:34:21 +0000 | [diff] [blame^] | 69 | if ("${LIBCXX_CXX_ABI}" STREQUAL "libsupc++") |
| 70 | set(LIBCXX_LIBSUPCXX_INCLUDE_PATHS "${LIBCXX_LIBSUPCXX_INCLUDE_PATHS}" |
| 71 | CACHE STRINGS |
| 72 | "Paths to libsupc++ include directories separate by ';'.") |
Michael J. Spencer | a358fbe | 2012-11-30 21:02:29 +0000 | [diff] [blame] | 73 | set(LIBCXX_CXX_ABI_LIBRARIES stdc++) |
| 74 | set(LIBCXX_LIBSUPCXX_FILES |
| 75 | cxxabi.h |
| 76 | bits/c++config.h |
| 77 | bits/os_defines.h |
| 78 | bits/cpu_defines.h |
| 79 | bits/cxxabi_tweaks.h |
| 80 | bits/cxxabi_forced.h |
| 81 | ) |
Michael J. Spencer | db8a030 | 2012-12-31 19:34:21 +0000 | [diff] [blame^] | 82 | # Create include directories. |
| 83 | file(MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/include") |
| 84 | file(MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/include/bits") |
Michael J. Spencer | a358fbe | 2012-11-30 21:02:29 +0000 | [diff] [blame] | 85 | set(LIBCXX_LIBSUPCXX_FILE_PATHS) |
| 86 | foreach(path ${LIBCXX_LIBSUPCXX_FILES}) |
| 87 | set(found FALSE) |
| 88 | foreach(incpath ${LIBCXX_LIBSUPCXX_INCLUDE_PATHS}) |
| 89 | if (EXISTS "${incpath}/${path}") |
| 90 | set(found TRUE) |
| 91 | get_filename_component(dstdir ${path} PATH) |
| 92 | get_filename_component(file ${path} NAME) |
| 93 | add_custom_command( |
| 94 | OUTPUT "${CMAKE_BINARY_DIR}/include/${dstdir}/${file}" |
| 95 | COMMAND ${CMAKE_COMMAND} -E copy_if_different |
| 96 | "${incpath}/${path}" |
| 97 | "${CMAKE_BINARY_DIR}/include/${dstdir}" |
| 98 | MAIN_DEPENDENCY "${incpath}/${path}" |
| 99 | ) |
| 100 | list(APPEND LIBCXX_CXX_ABI_DEPS |
| 101 | "${CMAKE_BINARY_DIR}/include/${dstdir}/${file}") |
| 102 | endif() |
| 103 | endforeach() |
| 104 | if (NOT found) |
| 105 | message(FATAL_ERROR "Failed to find ${path}") |
| 106 | endif() |
| 107 | endforeach() |
| 108 | add_custom_target(supcxx_headers DEPENDS ${LIBCXX_CXX_ABI_DEPS}) |
| 109 | set(LIBCXX_CXX_ABI_DEPS supcxx_headers) |
| 110 | include_directories("${CMAKE_BINARY_DIR}/include") |
| 111 | install(DIRECTORY "${CMAKE_BINARY_DIR}/include/" |
| 112 | DESTINATION include/c++/v1 |
| 113 | FILES_MATCHING |
| 114 | PATTERN "*" |
| 115 | ) |
Michael J. Spencer | db8a030 | 2012-12-31 19:34:21 +0000 | [diff] [blame^] | 116 | elseif (NOT "${LIBCXX_CXX_ABI}" STREQUAL "none") |
Michael J. Spencer | a358fbe | 2012-11-30 21:02:29 +0000 | [diff] [blame] | 117 | message(FATAL_ERROR |
| 118 | "Currently only none and libsupc++ are supported for c++ abi.") |
| 119 | endif () |
| 120 | |
Michael J. Spencer | 626916f | 2010-12-10 19:47:54 +0000 | [diff] [blame] | 121 | # Configure compiler. |
| 122 | include(config-ix) |
| 123 | |
| 124 | #=============================================================================== |
| 125 | # Setup Compiler Flags |
| 126 | #=============================================================================== |
| 127 | |
| 128 | # Get required flags. |
| 129 | # On all systems the system c++ standard library headers need to be excluded. |
| 130 | if (MSVC) |
| 131 | # MSVC only has -X, which disables all default includes; including the crt. |
| 132 | # Thus, we do nothing and hope we don't accidentally include any of the C++ |
| 133 | # headers. |
| 134 | else() |
| 135 | if (LIBCXX_HAS_NOSTDINCXX_FLAG) |
| 136 | set(LIBCXX_CXX_REQUIRED_FLAGS -nostdinc++) |
| 137 | endif() |
| 138 | if (LIBCXX_ENABLE_CXX0X AND LIBCXX_HAS_STDCXX0X_FLAG) |
| 139 | list(APPEND LIBCXX_CXX_REQUIRED_FLAGS -std=c++0x) |
| 140 | endif() |
| 141 | endif() |
| 142 | |
| 143 | macro(append_if list condition var) |
| 144 | if (${condition}) |
| 145 | list(APPEND ${list} ${var}) |
| 146 | endif() |
| 147 | endmacro() |
| 148 | |
| 149 | # Get warning flags |
Douglas Gregor | f9b6e7e | 2012-06-07 22:26:00 +0000 | [diff] [blame] | 150 | append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WALL_FLAG -Wall) |
| 151 | append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_W_FLAG -W) |
| 152 | append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WNO_UNUSED_PARAMETER_FLAG -Wno-unused-parameter) |
| 153 | append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WWRITE_STRINGS_FLAG -Wwrite-strings) |
| 154 | append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WNO_LONG_LONG_FLAG -Wno-long-long) |
Michael J. Spencer | 626916f | 2010-12-10 19:47:54 +0000 | [diff] [blame] | 155 | if (LIBCXX_ENABLE_WERROR) |
Douglas Gregor | f9b6e7e | 2012-06-07 22:26:00 +0000 | [diff] [blame] | 156 | append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WERROR_FLAG -Werror) |
| 157 | append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WX_FLAG -WX) |
Michael J. Spencer | 626916f | 2010-12-10 19:47:54 +0000 | [diff] [blame] | 158 | endif() |
| 159 | if (LIBCXX_ENABLE_PEDANTIC) |
Douglas Gregor | f9b6e7e | 2012-06-07 22:26:00 +0000 | [diff] [blame] | 160 | append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_PEDANTIC_FLAG -pedantic) |
Michael J. Spencer | 626916f | 2010-12-10 19:47:54 +0000 | [diff] [blame] | 161 | endif() |
| 162 | |
| 163 | # Get feature flags. |
| 164 | # Exceptions |
| 165 | if (LIBCXX_ENABLE_EXCEPTIONS) |
| 166 | # Catches C++ exceptions only and tells the compiler to assume that extern C |
| 167 | # functions never throw a C++ exception. |
| 168 | append_if(LIBCXX_CXX_FEATURE_FLAGS LIBCXX_HAS_EHSC_FLAG -EHsc) |
| 169 | else() |
| 170 | list(APPEND LIBCXX_CXX_FEATURE_FLAGS -D_LIBCPP_NO_EXCEPTIONS) |
| 171 | append_if(LIBCXX_CXX_FEATURE_FLAGS LIBCXX_HAS_NO_EHS_FLAG -EHs-) |
| 172 | append_if(LIBCXX_CXX_FEATURE_FLAGS LIBCXX_HAS_NO_EHA_FLAG -EHa-) |
| 173 | append_if(LIBCXX_CXX_FEATURE_FLAGS LIBCXX_HAS_FNO_EXCEPTIONS_FLAG -fno-exceptions) |
| 174 | endif() |
| 175 | # RTTI |
| 176 | if (NOT LIBCXX_ENABLE_RTTI) |
| 177 | list(APPEND LIBCXX_CXX_FEATURE_FLAGS -D_LIBCPP_NO_RTTI) |
| 178 | append_if(LIBCXX_CXX_FEATURE_FLAGS LIBCXX_HAS_NO_GR_FLAG -GR-) |
| 179 | append_if(LIBCXX_CXX_FEATURE_FLAGS LIBCXX_HAS_FNO_RTTI_FLAG -fno-rtti) |
| 180 | endif() |
| 181 | # Assert |
Howard Hinnant | e103a3d | 2012-08-05 17:37:39 +0000 | [diff] [blame] | 182 | string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE) |
| 183 | if (LIBCXX_ENABLE_ASSERTIONS) |
Michael J. Spencer | 626916f | 2010-12-10 19:47:54 +0000 | [diff] [blame] | 184 | # MSVC doesn't like _DEBUG on release builds. See PR 4379. |
| 185 | if (NOT MSVC) |
| 186 | list(APPEND LIBCXX_CXX_FEATURE_FLAGS -D_DEBUG) |
| 187 | endif() |
| 188 | # On Release builds cmake automatically defines NDEBUG, so we |
| 189 | # explicitly undefine it: |
| 190 | if (uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE") |
| 191 | list(APPEND LIBCXX_CXX_FEATURE_FLAGS -UNDEBUG) |
| 192 | endif() |
| 193 | else() |
| 194 | if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE") |
| 195 | list(APPEND LIBCXX_CXX_FEATURE_FLAGS -DNDEBUG) |
| 196 | endif() |
| 197 | endif() |
| 198 | |
| 199 | # This is the _ONLY_ place where add_definitions is called. |
| 200 | add_definitions( |
| 201 | ${LIBCXX_CXX_REQUIRED_FLAGS} |
| 202 | ${LIBCXX_CXX_WARNING_FLAGS} |
| 203 | ${LIBCXX_CXX_FEATURE_FLAGS} |
| 204 | ) |
| 205 | |
| 206 | #=============================================================================== |
| 207 | # Setup Source Code |
| 208 | #=============================================================================== |
| 209 | |
| 210 | include_directories(include) |
| 211 | |
| 212 | # Add source code. This also contains all of the logic for deciding linker flags |
| 213 | # soname, etc... |
| 214 | add_subdirectory(lib) |
| 215 | |
| 216 | #=============================================================================== |
| 217 | # Setup Tests |
| 218 | #=============================================================================== |
| 219 | |
| 220 | add_subdirectory(test) |