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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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120
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9 if(LLVM_LINK_LLVM_DYLIB AND LLVM_DYLIB_EXPORTED_SYMBOL_FILE)
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10 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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11 endif()
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83
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12
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147
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13 if(LLVM_BUILD_LLVM_DYLIB)
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14 if(MSVC)
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15 message(FATAL_ERROR "Generating libLLVM is not supported on MSVC")
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16 endif()
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17
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18 llvm_map_components_to_libnames(LIB_NAMES ${LLVM_DYLIB_COMPONENTS})
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19
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20 # libLLVM.so should not have any dependencies on any other LLVM
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21 # shared libraries. When using the "all" pseudo-component,
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22 # LLVM_AVAILABLE_LIBS is added to the dependencies, which may
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23 # contain shared libraries (e.g. libLTO).
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24 #
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25 # Also exclude libLLVMTableGen for the following reasons:
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26 # - it is only used by internal *-tblgen utilities;
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27 # - it pollutes the global options space.
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28 foreach(lib ${LIB_NAMES})
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29 get_target_property(t ${lib} TYPE)
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30 if("${lib}" STREQUAL "LLVMTableGen")
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31 elseif("x${t}" STREQUAL "xSTATIC_LIBRARY")
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32 list(APPEND FILTERED_LIB_NAMES ${lib})
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33 endif()
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34 endforeach()
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35 set(LIB_NAMES ${FILTERED_LIB_NAMES})
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36
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37 if(LLVM_DYLIB_EXPORTED_SYMBOL_FILE)
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38 set(LLVM_EXPORTED_SYMBOL_FILE ${LLVM_DYLIB_EXPORTED_SYMBOL_FILE})
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39 add_custom_target(libLLVMExports DEPENDS ${LLVM_EXPORTED_SYMBOL_FILE})
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40 endif()
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41
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42 if (LLVM_LINK_LLVM_DYLIB)
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43 set(INSTALL_WITH_TOOLCHAIN INSTALL_WITH_TOOLCHAIN)
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120
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44 endif()
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147
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45 add_llvm_library(LLVM SHARED DISABLE_LLVM_LINK_LLVM_DYLIB SONAME ${INSTALL_WITH_TOOLCHAIN} ${SOURCES})
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46
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47 list(REMOVE_DUPLICATES LIB_NAMES)
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48 if(("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux") OR (MINGW) OR (HAIKU)
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49 OR ("${CMAKE_SYSTEM_NAME}" STREQUAL "FreeBSD")
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50 OR ("${CMAKE_SYSTEM_NAME}" STREQUAL "GNU")
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51 OR ("${CMAKE_SYSTEM_NAME}" STREQUAL "OpenBSD")
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52 OR ("${CMAKE_SYSTEM_NAME}" STREQUAL "Fuchsia")
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53 OR ("${CMAKE_SYSTEM_NAME}" STREQUAL "DragonFly")
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54 OR ("${CMAKE_SYSTEM_NAME}" STREQUAL "SunOS")) # FIXME: It should be "GNU ld for elf"
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55 configure_file(
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56 ${CMAKE_CURRENT_SOURCE_DIR}/simple_version_script.map.in
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57 ${LLVM_LIBRARY_DIR}/tools/llvm-shlib/simple_version_script.map)
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95
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58
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147
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59 # GNU ld doesn't resolve symbols in the version script.
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60 set(LIB_NAMES -Wl,--whole-archive ${LIB_NAMES} -Wl,--no-whole-archive)
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61 if (NOT LLVM_LINKER_IS_SOLARISLD AND NOT MINGW)
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62 # Solaris ld does not accept global: *; so there is no way to version *all* global symbols
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63 set(LIB_NAMES -Wl,--version-script,${LLVM_LIBRARY_DIR}/tools/llvm-shlib/simple_version_script.map ${LIB_NAMES})
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64 endif()
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65 elseif("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin")
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66 set(LIB_NAMES -Wl,-all_load ${LIB_NAMES})
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67 endif()
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68
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69 target_link_libraries(LLVM PRIVATE ${LIB_NAMES})
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70
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71 if (APPLE)
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72 set_property(TARGET LLVM APPEND_STRING PROPERTY
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73 LINK_FLAGS
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74 " -compatibility_version 1 -current_version ${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}.${LLVM_VERSION_PATCH}")
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75 endif()
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76
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77 if(TARGET libLLVMExports)
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78 add_dependencies(LLVM libLLVMExports)
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79 endif()
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83
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80 endif()
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81
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147
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82 if(LLVM_BUILD_LLVM_C_DYLIB AND NOT MSVC)
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100
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83 if(NOT APPLE)
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84 message(FATAL_ERROR "Generating libLLVM-c is only supported on Darwin")
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85 endif()
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86
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147
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87 if(NOT LLVM_BUILD_LLVM_DYLIB)
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88 message(FATAL_ERROR "Generating libLLVM-c requires LLVM_BUILD_LLVM_C_DYLIB on Darwin")
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89 endif()
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90
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91 # To get the export list for a single llvm library:
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92 # nm ${LIB_PATH} | awk "/T _LLVM/ { print $3 }" | sort -u | sed -e "s/^_//g" > ${LIB_PATH}.exports
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93
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100
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94 set(LLVM_EXPORTED_SYMBOL_FILE ${CMAKE_BINARY_DIR}/libllvm-c.exports)
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95
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96 set(LIB_DIR ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/lib${LLVM_LIBDIR_SUFFIX})
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97 set(LIB_NAME ${LIB_DIR}/${CMAKE_SHARED_LIBRARY_PREFIX}LLVM)
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98 set(LIB_PATH ${LIB_NAME}${CMAKE_SHARED_LIBRARY_SUFFIX})
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99 set(LIB_EXPORTS_PATH ${LIB_NAME}.exports)
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100 list(APPEND LLVM_DYLIB_REQUIRED_EXPORTS ${LIB_EXPORTS_PATH})
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101
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102 add_custom_command(OUTPUT ${LLVM_EXPORTED_SYMBOL_FILE}
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103 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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104 WORKING_DIRECTORY ${LIB_DIR}
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105 DEPENDS LLVM
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106 COMMENT "Generating Export list for LLVM..."
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107 VERBATIM )
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108
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109 add_custom_target(libLLVMCExports DEPENDS ${LLVM_EXPORTED_SYMBOL_FILE})
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110
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147
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111 add_llvm_library(LLVM-C SHARED ${SOURCES} INSTALL_WITH_TOOLCHAIN)
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100
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112
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113 target_link_libraries(LLVM-C PUBLIC LLVM)
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114 add_dependencies(LLVM-C libLLVMCExports)
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115
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116 set_property(TARGET LLVM-C APPEND_STRING PROPERTY
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83
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117 LINK_FLAGS
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100
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118 " -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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119 endif()
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120
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147
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121 if(MSVC)
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122 # Build the LLVM-C.dll library that exports the C API.
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123
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124 set(LLVM_LINK_COMPONENTS
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125 ${LLVM_DYLIB_COMPONENTS}
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126 )
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127
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128 llvm_map_components_to_libnames(LIB_NAMES ${LLVM_DYLIB_COMPONENTS})
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129 list(REMOVE_DUPLICATES LIB_NAMES)
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130
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131 # The python script needs to know whether symbols are prefixed with underscores or not.
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132 if(LLVM_HOST_TRIPLE STREQUAL "i686-pc-win32")
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133 set(GEN_UNDERSCORE "--underscore")
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134 else()
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135 set(GEN_UNDERSCORE "")
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136 endif()
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137
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138 # Set this name here, not used in multi conf loop,
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139 # but add script will pick the right one.
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140 set(LIBSFILE ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/libllvm-c.args)
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141
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142 # Get the full name to the libs so the python script understands them.
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143 foreach(lib ${LIB_NAMES})
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144 list(APPEND FULL_LIB_NAMES ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/lib/${lib}.lib)
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145 endforeach()
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146
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147 # Need to seperate lib names with newlines.
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148 string(REPLACE ";" "\n" FILE_CONTENT "${FULL_LIB_NAMES}")
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149
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150 if(NOT "${CMAKE_CFG_INTDIR}" STREQUAL ".")
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151 foreach(BUILD_MODE ${CMAKE_CONFIGURATION_TYPES})
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152 # Replace the special string with a per config directory.
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153 string(REPLACE ${CMAKE_CFG_INTDIR} ${BUILD_MODE} PER_CONF_CONTENT "${FILE_CONTENT}")
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154
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155 # Write out the full lib names into file to be read by the python script.
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156 # One libsfile per build, the add_custom_command should expand
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157 # ${CMAKE_CFG_INTDIR} correctly and select the right one.
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158 file(WRITE ${CMAKE_BINARY_DIR}/${BUILD_MODE}/libllvm-c.args "${PER_CONF_CONTENT}")
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159 endforeach()
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160 else()
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161 # Write out the full lib names into file to be read by the python script.
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162 file(WRITE ${LIBSFILE} "${FILE_CONTENT}")
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163 endif()
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164
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165 # Generate the exports file dynamically.
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166 set(GEN_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/gen-msvc-exports.py)
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167
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168 set(LLVM_EXPORTED_SYMBOL_FILE ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/libllvm-c.exports)
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169
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170 if(CMAKE_CROSSCOMPILING)
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171 build_native_tool(llvm-nm llvm_nm)
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172 set(llvm_nm_target "${llvm_nm}")
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173 else()
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174 set(llvm_nm $<TARGET_FILE:llvm-nm>)
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175 set(llvm_nm_target llvm-nm)
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176 endif()
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177
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178 add_custom_command(OUTPUT ${LLVM_EXPORTED_SYMBOL_FILE}
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179 COMMAND ${PYTHON_EXECUTABLE} ${GEN_SCRIPT} --libsfile ${LIBSFILE} ${GEN_UNDERSCORE} --nm "${llvm_nm}" -o ${LLVM_EXPORTED_SYMBOL_FILE}
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180 DEPENDS ${LIB_NAMES} ${llvm_nm_target}
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181 COMMENT "Generating export list for LLVM-C"
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182 VERBATIM )
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183
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184 # Finally link the target.
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185 add_llvm_library(LLVM-C SHARED ${SOURCES} DEPENDS intrinsics_gen)
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186
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187 endif()
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