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 ${LIBCXX_CXX_ABI_INCLUDE_PATHS}) 40 if (EXISTS "${incpath}/${fpath}") 41 set(found TRUE) 42 get_filename_component(dstdir ${fpath} PATH) 43 get_filename_component(ifile ${fpath} NAME) 44 set(src ${incpath}/${fpath}) 45 46 set(dst ${LIBCXX_BINARY_INCLUDE_DIR}/${dstdir}/${ifile}) 47 add_custom_command(OUTPUT ${dst} 48 DEPENDS ${src} 49 COMMAND ${CMAKE_COMMAND} -E copy_if_different ${src} ${dst} 50 COMMENT "Copying C++ ABI header ${fpath}...") 51 list(APPEND abilib_headers "${dst}") 52 53 if (NOT LIBCXX_USING_INSTALLED_LLVM AND LIBCXX_HEADER_DIR) 54 set(dst "${LIBCXX_HEADER_DIR}/include/c++/v1/${dstdir}/${fpath}") 55 add_custom_command(OUTPUT ${dst} 56 DEPENDS ${src} 57 COMMAND ${CMAKE_COMMAND} -E copy_if_different ${src} ${dst} 58 COMMENT "Copying C++ ABI header ${fpath}...") 59 list(APPEND abilib_headers "${dst}") 60 endif() 61 62 if (LIBCXX_INSTALL_HEADERS) 63 install(FILES "${LIBCXX_BINARY_INCLUDE_DIR}/${fpath}" 64 DESTINATION ${LIBCXX_INSTALL_HEADER_PREFIX}include/c++/v1/${dstdir} 65 COMPONENT cxx-headers 66 PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ 67 ) 68 endif() 69 endif() 70 endforeach() 71 if (NOT found) 72 message(WARNING "Failed to find ${fpath}") 73 endif() 74 endforeach() 75 76 include_directories("${LIBCXX_BINARY_INCLUDE_DIR}") 77 add_custom_target(cxx_abi_headers ALL DEPENDS ${abilib_headers}) 78 set(LIBCXX_CXX_ABI_HEADER_TARGET "cxx_abi_headers") 79endmacro() 80 81 82# Configure based on the selected ABI library. 83if ("${LIBCXX_CXX_ABI_LIBNAME}" STREQUAL "libstdc++" OR 84 "${LIBCXX_CXX_ABI_LIBNAME}" STREQUAL "libsupc++") 85 set(_LIBSUPCXX_INCLUDE_FILES 86 cxxabi.h bits/c++config.h bits/os_defines.h bits/cpu_defines.h 87 bits/cxxabi_tweaks.h bits/cxxabi_forced.h 88 ) 89 if ("${LIBCXX_CXX_ABI_LIBNAME}" STREQUAL "libstdc++") 90 set(_LIBSUPCXX_DEFINES "-DLIBSTDCXX") 91 set(_LIBSUPCXX_LIBNAME stdc++) 92 else() 93 set(_LIBSUPCXX_DEFINES "") 94 set(_LIBSUPCXX_LIBNAME supc++) 95 endif() 96 setup_abi_lib( 97 "-D__GLIBCXX__ ${_LIBSUPCXX_DEFINES}" 98 "${_LIBSUPCXX_LIBNAME}" "${_LIBSUPCXX_LIBNAME}" "${_LIBSUPCXX_INCLUDE_FILES}" "bits" 99 ) 100elseif ("${LIBCXX_CXX_ABI_LIBNAME}" STREQUAL "libcxxabi") 101 if (LIBCXX_CXX_ABI_INTREE) 102 # Link against just-built "cxxabi" target. 103 set(CXXABI_SHARED_LIBNAME cxxabi_shared) 104 set(CXXABI_STATIC_LIBNAME cxxabi_static) 105 else() 106 # Assume c++abi is installed in the system, rely on -lc++abi link flag. 107 set(CXXABI_SHARED_LIBNAME "c++abi") 108 set(CXXABI_STATIC_LIBNAME "c++abi") 109 endif() 110 if (LIBCXX_CXX_ABI_SYSTEM) 111 set(HEADERS "") 112 else() 113 set(HEADERS "cxxabi.h;__cxxabi_config.h") 114 endif() 115 setup_abi_lib( 116 "-DLIBCXX_BUILDING_LIBCXXABI" 117 "${CXXABI_SHARED_LIBNAME}" "${CXXABI_STATIC_LIBNAME}" "${HEADERS}" "") 118elseif ("${LIBCXX_CXX_ABI_LIBNAME}" STREQUAL "libcxxrt") 119 setup_abi_lib( 120 "-DLIBCXXRT" 121 "cxxrt" "cxxrt" "cxxabi.h;unwind.h;unwind-arm.h;unwind-itanium.h" "" 122 ) 123elseif ("${LIBCXX_CXX_ABI_LIBNAME}" STREQUAL "vcruntime") 124 # Nothing TODO 125elseif ("${LIBCXX_CXX_ABI_LIBNAME}" STREQUAL "none") 126 list(APPEND LIBCXX_COMPILE_FLAGS "-D_LIBCPP_BUILDING_HAS_NO_ABI_LIBRARY") 127elseif ("${LIBCXX_CXX_ABI_LIBNAME}" STREQUAL "default") 128 # Nothing TODO 129else() 130 message(FATAL_ERROR 131 "Unsupported c++ abi: '${LIBCXX_CXX_ABI_LIBNAME}'. \ 132 Currently libstdc++, libsupc++, libcxxabi, libcxxrt, default and none are 133 supported for c++ abi." 134 ) 135endif () 136