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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 set(SOURCES
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6 libllvm.cpp
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7 )
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8
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95
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9 llvm_map_components_to_libnames(LIB_NAMES ${LLVM_DYLIB_COMPONENTS})
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83
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10
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120
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11 if(LLVM_LINK_LLVM_DYLIB AND LLVM_DYLIB_EXPORTED_SYMBOL_FILE)
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12 message(WARNING "Using LLVM_LINK_LLVM_DYLIB with LLVM_DYLIB_EXPORTED_SYMBOL_FILE may not work. Use at your own risk.")
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13 endif()
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83
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14
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120
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15 # libLLVM.so should not have any dependencies on any other LLVM
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16 # shared libraries. When using the "all" pseudo-component,
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17 # LLVM_AVAILABLE_LIBS is added to the dependencies, which may
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18 # contain shared libraries (e.g. libLTO).
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19 #
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20 # Also exclude libLLVMTableGen for the following reasons:
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21 # - it is only used by internal *-tblgen utilities;
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22 # - it pollutes the global options space.
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23 foreach(lib ${LIB_NAMES})
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24 get_target_property(t ${lib} TYPE)
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25 if("${lib}" STREQUAL "LLVMTableGen")
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26 elseif("x${t}" STREQUAL "xSTATIC_LIBRARY")
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27 list(APPEND FILTERED_LIB_NAMES ${lib})
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28 endif()
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29 endforeach()
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30 set(LIB_NAMES ${FILTERED_LIB_NAMES})
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95
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31
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100
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32 if(LLVM_DYLIB_EXPORTED_SYMBOL_FILE)
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95
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33 set(LLVM_EXPORTED_SYMBOL_FILE ${LLVM_DYLIB_EXPORTED_SYMBOL_FILE})
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34 add_custom_target(libLLVMExports DEPENDS ${LLVM_EXPORTED_SYMBOL_FILE})
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83
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35 endif()
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36
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100
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37 add_llvm_library(LLVM SHARED DISABLE_LLVM_LINK_LLVM_DYLIB SONAME ${SOURCES})
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83
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38
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95
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39 list(REMOVE_DUPLICATES LIB_NAMES)
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120
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40 if("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux" OR MINGW) # FIXME: It should be "GNU ld for elf"
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83
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41 # GNU ld doesn't resolve symbols in the version script.
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42 set(LIB_NAMES -Wl,--whole-archive ${LIB_NAMES} -Wl,--no-whole-archive)
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95
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43 elseif("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin")
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44 set(LIB_NAMES -Wl,-all_load ${LIB_NAMES})
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83
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45 endif()
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46
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95
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47 target_link_libraries(LLVM PRIVATE ${LIB_NAMES})
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83
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48
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100
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49 if (APPLE)
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50 set_property(TARGET LLVM APPEND_STRING PROPERTY
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51 LINK_FLAGS
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52 " -compatibility_version 1 -current_version ${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}.${LLVM_VERSION_PATCH}")
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53 endif()
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54
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95
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55 if(TARGET libLLVMExports)
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56 add_dependencies(LLVM libLLVMExports)
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57 endif()
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83
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58
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100
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59 if(LLVM_BUILD_LLVM_C_DYLIB)
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60 # To get the export list for a single llvm library:
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61 # nm ${LIB_PATH} | awk "/T _LLVM/ { print $3 }" | sort -u | sed -e "s/^_//g" > ${LIB_PATH}.exports
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62
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63 if(NOT APPLE)
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64 message(FATAL_ERROR "Generating libLLVM-c is only supported on Darwin")
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65 endif()
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66
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67 set(LLVM_EXPORTED_SYMBOL_FILE ${CMAKE_BINARY_DIR}/libllvm-c.exports)
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68
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69 set(LIB_DIR ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/lib${LLVM_LIBDIR_SUFFIX})
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70 set(LIB_NAME ${LIB_DIR}/${CMAKE_SHARED_LIBRARY_PREFIX}LLVM)
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71 set(LIB_PATH ${LIB_NAME}${CMAKE_SHARED_LIBRARY_SUFFIX})
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72 set(LIB_EXPORTS_PATH ${LIB_NAME}.exports)
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73 list(APPEND LLVM_DYLIB_REQUIRED_EXPORTS ${LIB_EXPORTS_PATH})
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74
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75 add_custom_command(OUTPUT ${LLVM_EXPORTED_SYMBOL_FILE}
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76 COMMAND nm ${LIB_PATH} | awk "/T _LLVM/ || /T LLVM/ { print $3 }" | sort -u | sed -e "s/^_//g" > ${LLVM_EXPORTED_SYMBOL_FILE}
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77 WORKING_DIRECTORY ${LIB_DIR}
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78 DEPENDS LLVM
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79 COMMENT "Generating Export list for LLVM..."
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80 VERBATIM )
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81
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82 add_custom_target(libLLVMCExports DEPENDS ${LLVM_EXPORTED_SYMBOL_FILE})
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83
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84 add_llvm_library(LLVM-C SHARED ${SOURCES})
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85
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86 target_link_libraries(LLVM-C PUBLIC LLVM)
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87 add_dependencies(LLVM-C libLLVMCExports)
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88
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89 set_property(TARGET LLVM-C APPEND_STRING PROPERTY
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83
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90 LINK_FLAGS
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100
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91 " -compatibility_version 1 -current_version ${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}.${LLVM_VERSION_PATCH} -Wl,-reexport_library ${LIB_PATH}")
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83
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92 endif()
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93
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