96 lines
3.5 KiB
CMake
96 lines
3.5 KiB
CMake
# This tool creates a shared library from the LLVM libraries. Generating this
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# library is enabled by setting LLVM_BUILD_LLVM_DYLIB=yes on the CMake
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# commandline. By default the shared library only exports the LLVM C API.
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set(SOURCES
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libllvm.cpp
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)
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llvm_map_components_to_libnames(LIB_NAMES ${LLVM_DYLIB_COMPONENTS})
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if(LLVM_LINK_LLVM_DYLIB)
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if(LLVM_DYLIB_EXPORTED_SYMBOL_FILE)
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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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endif()
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# libLLVM.so should not have any dependencies on any other LLVM
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# shared libraries. When using the "all" pseudo-component,
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# LLVM_AVAILABLE_LIBS is added to the dependencies, which may
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# contain shared libraries (e.g. libLTO).
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#
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# Also exclude libLLVMTableGen for the following reasons:
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# - it is only used by internal *-tblgen utilities;
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# - it pollutes the global options space.
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foreach(lib ${LIB_NAMES})
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get_target_property(t ${lib} TYPE)
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if("${lib}" STREQUAL "LLVMTableGen")
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elseif("x${t}" STREQUAL "xSTATIC_LIBRARY")
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list(APPEND FILTERED_LIB_NAMES ${lib})
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endif()
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endforeach()
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set(LIB_NAMES ${FILTERED_LIB_NAMES})
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endif()
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if(LLVM_DYLIB_EXPORTED_SYMBOL_FILE)
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set(LLVM_EXPORTED_SYMBOL_FILE ${LLVM_DYLIB_EXPORTED_SYMBOL_FILE})
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add_custom_target(libLLVMExports DEPENDS ${LLVM_EXPORTED_SYMBOL_FILE})
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endif()
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add_llvm_library(LLVM SHARED DISABLE_LLVM_LINK_LLVM_DYLIB SONAME ${SOURCES})
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list(REMOVE_DUPLICATES LIB_NAMES)
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if("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux") # FIXME: It should be "GNU ld for elf"
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# GNU ld doesn't resolve symbols in the version script.
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set(LIB_NAMES -Wl,--whole-archive ${LIB_NAMES} -Wl,--no-whole-archive)
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elseif("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin")
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set(LIB_NAMES -Wl,-all_load ${LIB_NAMES})
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endif()
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target_link_libraries(LLVM PRIVATE ${LIB_NAMES})
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if (APPLE)
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set_property(TARGET LLVM APPEND_STRING PROPERTY
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LINK_FLAGS
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" -compatibility_version 1 -current_version ${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}.${LLVM_VERSION_PATCH}")
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endif()
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if(TARGET libLLVMExports)
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add_dependencies(LLVM libLLVMExports)
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endif()
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if(LLVM_BUILD_LLVM_C_DYLIB)
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# To get the export list for a single llvm library:
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# nm ${LIB_PATH} | awk "/T _LLVM/ { print $3 }" | sort -u | sed -e "s/^_//g" > ${LIB_PATH}.exports
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if(NOT APPLE)
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message(FATAL_ERROR "Generating libLLVM-c is only supported on Darwin")
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endif()
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set(LLVM_EXPORTED_SYMBOL_FILE ${CMAKE_BINARY_DIR}/libllvm-c.exports)
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set(LIB_DIR ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/lib${LLVM_LIBDIR_SUFFIX})
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set(LIB_NAME ${LIB_DIR}/${CMAKE_SHARED_LIBRARY_PREFIX}LLVM)
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set(LIB_PATH ${LIB_NAME}${CMAKE_SHARED_LIBRARY_SUFFIX})
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set(LIB_EXPORTS_PATH ${LIB_NAME}.exports)
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list(APPEND LLVM_DYLIB_REQUIRED_EXPORTS ${LIB_EXPORTS_PATH})
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add_custom_command(OUTPUT ${LLVM_EXPORTED_SYMBOL_FILE}
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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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WORKING_DIRECTORY ${LIB_DIR}
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DEPENDS LLVM
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COMMENT "Generating Export list for LLVM..."
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VERBATIM )
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add_custom_target(libLLVMCExports DEPENDS ${LLVM_EXPORTED_SYMBOL_FILE})
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add_llvm_library(LLVM-C SHARED ${SOURCES})
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target_link_libraries(LLVM-C PUBLIC LLVM)
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add_dependencies(LLVM-C libLLVMCExports)
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set_property(TARGET LLVM-C APPEND_STRING PROPERTY
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LINK_FLAGS
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" -compatibility_version 1 -current_version ${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}.${LLVM_VERSION_PATCH} -Wl,-reexport_library ${LIB_PATH}")
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endif()
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