1 2#=============================================================================== 3# Add an ABI library if appropriate 4#=============================================================================== 5 6# 7# _setup_abi: Set up the build to use an ABI library 8# 9# Parameters: 10# abidefines: A list of defines needed to compile libc++ with the ABI library 11# abishared : The shared ABI library to link against. 12# abistatic : The static ABI library to link against. 13# abifiles : A list of files (which may be relative paths) to copy into the 14# libc++ build tree for the build. These files will be copied 15# twice: once into include/, so the libc++ build itself can find 16# them, and once into include/c++/v1, so that a clang built into 17# the same build area will find them. These files will also be 18# installed alongside the libc++ headers. 19# abidirs : A list of relative paths to create under an include directory 20# in the libc++ build directory. 21# 22 23macro(setup_abi_lib abidefines abishared abistatic abifiles abidirs) 24 list(APPEND LIBCXX_COMPILE_FLAGS ${abidefines}) 25 set(LIBCXX_CXX_ABI_INCLUDE_PATHS "${LIBCXX_CXX_ABI_INCLUDE_PATHS}" 26 CACHE PATH 27 "Paths to C++ ABI header directories separated by ';'." FORCE 28 ) 29 set(LIBCXX_CXX_ABI_LIBRARY_PATH "${LIBCXX_CXX_ABI_LIBRARY_PATH}" 30 CACHE PATH 31 "Paths to C++ ABI library directory" 32 ) 33 set(LIBCXX_CXX_SHARED_ABI_LIBRARY ${abishared}) 34 set(LIBCXX_CXX_STATIC_ABI_LIBRARY ${abistatic}) 35 set(LIBCXX_ABILIB_FILES ${abifiles}) 36 37 foreach(fpath ${LIBCXX_ABILIB_FILES}) 38 set(found FALSE) 39 foreach(incpath ${LIBCXX_CXX_ABI_INCLUDE_PATHS}) 40 message(STATUS "Looking for ${fpath} in ${incpath}") 41 if (EXISTS "${incpath}/${fpath}") 42 set(found TRUE) 43 message(STATUS "Looking for ${fpath} in ${incpath} - found") 44 get_filename_component(dstdir ${fpath} PATH) 45 get_filename_component(ifile ${fpath} NAME) 46 set(src ${incpath}/${fpath}) 47 48 set(dst ${LIBCXX_BINARY_INCLUDE_DIR}/${dstdir}/${ifile}) 49 add_custom_command(OUTPUT ${dst} 50 DEPENDS ${src} 51 COMMAND ${CMAKE_COMMAND} -E copy_if_different ${src} ${dst} 52 COMMENT "Copying C++ ABI header ${fpath}...") 53 list(APPEND abilib_headers "${dst}") 54 55 if (LIBCXX_HEADER_DIR) 56 set(dst "${LIBCXX_HEADER_DIR}/include/c++/v1/${dstdir}/${fpath}") 57 add_custom_command(OUTPUT ${dst} 58 DEPENDS ${src} 59 COMMAND ${CMAKE_COMMAND} -E copy_if_different ${src} ${dst} 60 COMMENT "Copying C++ ABI header ${fpath}...") 61 list(APPEND abilib_headers "${dst}") 62 endif() 63 64 if (LIBCXX_INSTALL_HEADERS) 65 install(FILES "${LIBCXX_BINARY_INCLUDE_DIR}/${fpath}" 66 DESTINATION ${LIBCXX_INSTALL_HEADER_PREFIX}include/c++/v1/${dstdir} 67 COMPONENT cxx-headers 68 PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ 69 ) 70 endif() 71 else() 72 message(STATUS "Looking for ${fpath} in ${incpath} - not found") 73 endif() 74 endforeach() 75 if (NOT found) 76 message(WARNING "Failed to find ${fpath} in ${LIBCXX_CXX_ABI_INCLUDE_PATHS}") 77 endif() 78 endforeach() 79 80 include_directories("${LIBCXX_BINARY_INCLUDE_DIR}") 81 add_custom_target(cxx_abi_headers ALL DEPENDS ${abilib_headers}) 82 set(LIBCXX_CXX_ABI_HEADER_TARGET "cxx_abi_headers") 83endmacro() 84 85 86# Configure based on the selected ABI library. 87if ("${LIBCXX_CXX_ABI_LIBNAME}" STREQUAL "libstdc++" OR 88 "${LIBCXX_CXX_ABI_LIBNAME}" STREQUAL "libsupc++") 89 set(_LIBSUPCXX_INCLUDE_FILES 90 cxxabi.h bits/c++config.h bits/os_defines.h bits/cpu_defines.h 91 bits/cxxabi_tweaks.h bits/cxxabi_forced.h 92 ) 93 if ("${LIBCXX_CXX_ABI_LIBNAME}" STREQUAL "libstdc++") 94 set(_LIBSUPCXX_DEFINES "-DLIBSTDCXX") 95 set(_LIBSUPCXX_LIBNAME stdc++) 96 else() 97 set(_LIBSUPCXX_DEFINES "") 98 set(_LIBSUPCXX_LIBNAME supc++) 99 endif() 100 setup_abi_lib( 101 "-D__GLIBCXX__ ${_LIBSUPCXX_DEFINES}" 102 "${_LIBSUPCXX_LIBNAME}" "${_LIBSUPCXX_LIBNAME}" "${_LIBSUPCXX_INCLUDE_FILES}" "bits" 103 ) 104elseif ("${LIBCXX_CXX_ABI_LIBNAME}" STREQUAL "libcxxabi") 105 if(NOT LIBCXX_CXX_ABI_INCLUDE_PATHS) 106 set(LIBCXX_CXX_ABI_INCLUDE_PATHS "${LIBCXX_SOURCE_DIR}/../libcxxabi/include") 107 endif() 108 109 if(LIBCXX_STANDALONE_BUILD AND NOT (LIBCXX_CXX_ABI_INTREE OR HAVE_LIBCXXABI)) 110 set(shared c++abi) 111 set(static c++abi) 112 else() 113 set(shared cxxabi_shared) 114 set(static cxxabi_static) 115 endif() 116 117 setup_abi_lib( 118 "-DLIBCXX_BUILDING_LIBCXXABI" 119 "${shared}" "${static}" "cxxabi.h;__cxxabi_config.h" "") 120elseif ("${LIBCXX_CXX_ABI_LIBNAME}" STREQUAL "libcxxrt") 121 if(NOT LIBCXX_CXX_ABI_INCLUDE_PATHS) 122 set(LIBCXX_CXX_ABI_INCLUDE_PATHS "/usr/include/c++/v1") 123 endif() 124 setup_abi_lib( 125 "-DLIBCXXRT" 126 "cxxrt" "cxxrt" "cxxabi.h;unwind.h;unwind-arm.h;unwind-itanium.h" "" 127 ) 128elseif ("${LIBCXX_CXX_ABI_LIBNAME}" STREQUAL "vcruntime") 129 # Nothing to do 130elseif ("${LIBCXX_CXX_ABI_LIBNAME}" STREQUAL "none") 131 list(APPEND LIBCXX_COMPILE_FLAGS "-D_LIBCPP_BUILDING_HAS_NO_ABI_LIBRARY") 132elseif ("${LIBCXX_CXX_ABI_LIBNAME}" STREQUAL "default") 133 # Nothing to do 134else() 135 message(FATAL_ERROR 136 "Unsupported c++ abi: '${LIBCXX_CXX_ABI_LIBNAME}'. \ 137 Currently libstdc++, libsupc++, libcxxabi, libcxxrt, default and none are 138 supported for c++ abi." 139 ) 140endif () 141