1 # This tool creates a shared library from the LLVM libraries. Generating this 2 # library is enabled by setting LLVM_BUILD_LLVM_DYLIB=yes on the CMake 3 # commandline. By default the shared library only exports the LLVM C API. 4 5 set(SOURCES 6 libllvm.cpp 7 ) 8 9 llvm_map_components_to_libnames(LIB_NAMES ${LLVM_DYLIB_COMPONENTS}) 10 11 if(LLVM_LINK_LLVM_DYLIB AND LLVM_DYLIB_EXPORTED_SYMBOL_FILE) 12 message(WARNING "Using LLVM_LINK_LLVM_DYLIB with LLVM_DYLIB_EXPORTED_SYMBOL_FILE may not work. Use at your own risk.") 13 endif() 14 15 # libLLVM.so should not have any dependencies on any other LLVM 16 # shared libraries. When using the "all" pseudo-component, 17 # LLVM_AVAILABLE_LIBS is added to the dependencies, which may 18 # contain shared libraries (e.g. libLTO). 19 # 20 # Also exclude libLLVMTableGen for the following reasons: 21 # - it is only used by internal *-tblgen utilities; 22 # - it pollutes the global options space. 23 foreach(lib ${LIB_NAMES}) 24 get_target_property(t ${lib} TYPE) 25 if("${lib}" STREQUAL "LLVMTableGen") 26 elseif("x${t}" STREQUAL "xSTATIC_LIBRARY") 27 list(APPEND FILTERED_LIB_NAMES ${lib}) 28 endif() 29 endforeach() 30 set(LIB_NAMES ${FILTERED_LIB_NAMES}) 31 32 if(LLVM_DYLIB_EXPORTED_SYMBOL_FILE) 33 set(LLVM_EXPORTED_SYMBOL_FILE ${LLVM_DYLIB_EXPORTED_SYMBOL_FILE}) 34 add_custom_target(libLLVMExports DEPENDS ${LLVM_EXPORTED_SYMBOL_FILE}) 35 endif() 36 37 add_llvm_library(LLVM SHARED DISABLE_LLVM_LINK_LLVM_DYLIB SONAME ${SOURCES}) 38 39 list(REMOVE_DUPLICATES LIB_NAMES) 40 if(("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux") OR (MINGW) OR (HAIKU) 41 OR ("${CMAKE_SYSTEM_NAME}" STREQUAL "FreeBSD") 42 OR ("${CMAKE_SYSTEM_NAME}" STREQUAL "OpenBSD") 43 OR ("${CMAKE_SYSTEM_NAME}" STREQUAL "Fuchsia") 44 OR ("${CMAKE_SYSTEM_NAME}" STREQUAL "DragonFly") 45 OR ("${CMAKE_SYSTEM_NAME}" STREQUAL "SunOS")) # FIXME: It should be "GNU ld for elf" 46 configure_file( 47 ${CMAKE_CURRENT_SOURCE_DIR}/simple_version_script.map.in 48 ${LLVM_LIBRARY_DIR}/tools/llvm-shlib/simple_version_script.map) 49 50 # GNU ld doesn't resolve symbols in the version script. 51 set(LIB_NAMES -Wl,--whole-archive ${LIB_NAMES} -Wl,--no-whole-archive) 52 if (NOT LLVM_LINKER_IS_SOLARISLD) 53 # Solaris ld does not accept global: *; so there is no way to version *all* global symbols 54 set(LIB_NAMES -Wl,--version-script,${LLVM_LIBRARY_DIR}/tools/llvm-shlib/simple_version_script.map ${LIB_NAMES}) 55 endif() 56 elseif("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin") 57 set(LIB_NAMES -Wl,-all_load ${LIB_NAMES}) 58 endif() 59 60 target_link_libraries(LLVM PRIVATE ${LIB_NAMES}) 61 62 if (APPLE) 63 set_property(TARGET LLVM APPEND_STRING PROPERTY 64 LINK_FLAGS 65 " -compatibility_version 1 -current_version ${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}.${LLVM_VERSION_PATCH}") 66 endif() 67 68 if(TARGET libLLVMExports) 69 add_dependencies(LLVM libLLVMExports) 70 endif() 71 72 if(LLVM_BUILD_LLVM_C_DYLIB) 73 # To get the export list for a single llvm library: 74 # nm ${LIB_PATH} | awk "/T _LLVM/ { print $3 }" | sort -u | sed -e "s/^_//g" > ${LIB_PATH}.exports 75 76 if(NOT APPLE) 77 message(FATAL_ERROR "Generating libLLVM-c is only supported on Darwin") 78 endif() 79 80 set(LLVM_EXPORTED_SYMBOL_FILE ${CMAKE_BINARY_DIR}/libllvm-c.exports) 81 82 set(LIB_DIR ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/lib${LLVM_LIBDIR_SUFFIX}) 83 set(LIB_NAME ${LIB_DIR}/${CMAKE_SHARED_LIBRARY_PREFIX}LLVM) 84 set(LIB_PATH ${LIB_NAME}${CMAKE_SHARED_LIBRARY_SUFFIX}) 85 set(LIB_EXPORTS_PATH ${LIB_NAME}.exports) 86 list(APPEND LLVM_DYLIB_REQUIRED_EXPORTS ${LIB_EXPORTS_PATH}) 87 88 add_custom_command(OUTPUT ${LLVM_EXPORTED_SYMBOL_FILE} 89 COMMAND nm ${LIB_PATH} | awk "/T _LLVM/ || /T LLVM/ { print $3 }" | sort -u | sed -e "s/^_//g" > ${LLVM_EXPORTED_SYMBOL_FILE} 90 WORKING_DIRECTORY ${LIB_DIR} 91 DEPENDS LLVM 92 COMMENT "Generating Export list for LLVM..." 93 VERBATIM ) 94 95 add_custom_target(libLLVMCExports DEPENDS ${LLVM_EXPORTED_SYMBOL_FILE}) 96 97 add_llvm_library(LLVM-C SHARED ${SOURCES}) 98 99 target_link_libraries(LLVM-C PUBLIC LLVM) 100 add_dependencies(LLVM-C libLLVMCExports) 101 102 set_property(TARGET LLVM-C APPEND_STRING PROPERTY 103 LINK_FLAGS 104 " -compatibility_version 1 -current_version ${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}.${LLVM_VERSION_PATCH} -Wl,-reexport_library ${LIB_PATH}") 105 endif() 106 107
