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