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83
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1 # This tool creates a shared library from the LLVM libraries. Generating this
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2 # library is enabled by setting LLVM_BUILD_LLVM_DYLIB=yes on the CMake
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3 # commandline. By default the shared library only exports the LLVM C API.
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4
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5 add_definitions( -DLLVM_VERSION_INFO=\"${PACKAGE_VERSION}\" )
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6
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7 set(SOURCES
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8 libllvm.cpp
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9 )
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10
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95
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11 llvm_map_components_to_libnames(LIB_NAMES ${LLVM_DYLIB_COMPONENTS})
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83
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12
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95
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13 if(LLVM_LINK_LLVM_DYLIB)
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14 if(NOT LLVM_DYLIB_EXPORT_ALL)
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15 message(FATAL_ERROR "LLVM_DYLIB_EXPORT_ALL must be ON when LLVM_LINK_LLVM_DYLIB is ON")
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83
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16 endif()
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17
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95
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18 # libLLVM.so should not have any dependencies on any other LLVM
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19 # shared libraries. When using the "all" pseudo-component,
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20 # LLVM_AVAILABLE_LIBS is added to the dependencies, which may
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21 # contain shared libraries (e.g. libLTO).
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22 #
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23 # Also exclude libLLVMTableGen for the following reasons:
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24 # - it is only used by internal *-tblgen utilities;
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25 # - it pollutes the global options space.
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26 foreach(lib ${LIB_NAMES})
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27 get_target_property(t ${lib} TYPE)
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28 if("${lib}" STREQUAL "LLVMTableGen")
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29 elseif("x${t}" STREQUAL "xSTATIC_LIBRARY")
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30 list(APPEND FILTERED_LIB_NAMES ${lib})
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31 endif()
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32 endforeach()
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33 set(LIB_NAMES ${FILTERED_LIB_NAMES})
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34 endif()
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35
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36 if(NOT DEFINED LLVM_DYLIB_EXPORTED_SYMBOL_FILE)
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83
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37 # To get the export list for a single llvm library:
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38 # nm ${LIB_PATH} | awk "/T _LLVM/ { print $3 }" | sort -u | sed -e "s/^_//g" > ${LIB_PATH}.exports
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39
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95
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40 if (NOT LLVM_DYLIB_EXPORT_ALL)
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41 if( WIN32 AND NOT CYGWIN )
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42 message(FATAL_ERROR "Auto-generation not implemented for Win32 without GNU utils. Please specify LLVM_EXPORTED_SYMBOL_FILE.")
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43 endif()
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83
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44
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95
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45 set(LLVM_EXPORTED_SYMBOL_FILE ${CMAKE_BINARY_DIR}/libllvm.exports)
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83
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46
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95
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47 foreach (lib ${LIB_NAMES})
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48 set(LIB_DIR ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/lib${LLVM_LIBDIR_SUFFIX})
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49 set(LIB_NAME ${LIB_DIR}/${CMAKE_STATIC_LIBRARY_PREFIX}${lib})
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50 set(LIB_PATH ${LIB_NAME}${CMAKE_STATIC_LIBRARY_SUFFIX})
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51 set(LIB_EXPORTS_PATH ${LIB_NAME}.exports)
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52 list(APPEND LLVM_DYLIB_REQUIRED_EXPORTS ${LIB_EXPORTS_PATH})
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83
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53
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95
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54
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55 add_custom_command(OUTPUT ${LIB_EXPORTS_PATH}
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56 COMMAND nm ${LIB_PATH} | awk "/T _LLVM/ || /T LLVM/ { print $3 }" | sort -u | sed -e "s/^_//g" > ${LIB_EXPORTS_PATH}
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57 WORKING_DIRECTORY ${LIB_DIR}
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58 DEPENDS ${lib}
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59 COMMENT "Generating Export list for ${lib}..."
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60 VERBATIM )
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61 endforeach ()
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62
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63 add_custom_command(OUTPUT ${LLVM_EXPORTED_SYMBOL_FILE}
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64 COMMAND cat ${LLVM_DYLIB_REQUIRED_EXPORTS} > ${LLVM_EXPORTED_SYMBOL_FILE}
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83
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65 WORKING_DIRECTORY ${LIB_DIR}
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95
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66 DEPENDS ${LLVM_DYLIB_REQUIRED_EXPORTS}
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67 COMMENT "Generating combined export list...")
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68 add_custom_target(libLLVMExports DEPENDS ${LLVM_EXPORTED_SYMBOL_FILE})
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69 endif()
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70 else()
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71 set(LLVM_EXPORTED_SYMBOL_FILE ${LLVM_DYLIB_EXPORTED_SYMBOL_FILE})
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72 add_custom_target(libLLVMExports DEPENDS ${LLVM_EXPORTED_SYMBOL_FILE})
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83
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73 endif()
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74
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95
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75 add_llvm_library(LLVM SHARED DISABLE_LLVM_LINK_LLVM_DYLIB ${SOURCES})
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83
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76
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95
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77 list(REMOVE_DUPLICATES LIB_NAMES)
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83
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78 if("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux") # FIXME: It should be "GNU ld for elf"
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79 # GNU ld doesn't resolve symbols in the version script.
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80 set(LIB_NAMES -Wl,--whole-archive ${LIB_NAMES} -Wl,--no-whole-archive)
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95
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81 elseif("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin")
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82 set(LIB_NAMES -Wl,-all_load ${LIB_NAMES})
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83
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83 endif()
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84
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95
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85 target_link_libraries(LLVM PRIVATE ${LIB_NAMES})
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83
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86
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95
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87 if(TARGET libLLVMExports)
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88 add_dependencies(LLVM libLLVMExports)
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89 endif()
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83
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90
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91 if (APPLE)
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92 set_property(TARGET LLVM APPEND_STRING PROPERTY
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93 LINK_FLAGS
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94 " -compatibility_version ${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR} -current_version ${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}")
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95 endif()
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96
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