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