mirror of
https://github.com/c64scene-ar/llvm-6502.git
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5f3f254ed1
FIXME: It should work on not only Linux but elf-targeting gnu ld.
For example if LLVM_DYLIB_COMPONENTS is "BitWriter Support", CMake emits the command line like;
-Wl,--whole-archive
lib/libLLVMBitWriter.a
lib/libLLVMSupport.a *1
-Wl,--no-whole-archive
lib/libLLVMCore.a
lib/libLLVMSupport.a *2
-lrt -ldl -ltinfo -lpthread -lm
It works since symbols in LLVMCore is resolved with not *2 but *1.
Unfortunately, --gc-sections is not powerful in this case to prune unused "visibility(default)" entries.
I am still experimenting other way not to rely on --whole-archive.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221591 91177308-0d34-0410-b5e6-96231b3b80d8
104 lines
3.0 KiB
CMake
104 lines
3.0 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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# You can configure which libraries from LLVM you want to include in the shared
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# library by setting LLVM_DYLIB_COMPONENTS to a semi-colon delimited list of
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# LLVM components. All compoenent names handled by llvm-config are valid.
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if(NOT DEFINED LLVM_DYLIB_COMPONENTS)
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set(LLVM_DYLIB_COMPONENTS
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${LLVM_TARGETS_TO_BUILD}
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Analysis
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AsmPrinter
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BitReader
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BitWriter
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CodeGen
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Core
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ExecutionEngine
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IPA
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IPO
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IRReader
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InstCombine
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Instrumentation
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Interpreter
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Linker
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MC
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MCDisassembler
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MCJIT
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ObjCARCOpts
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Object
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ScalarOpts
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SelectionDAG
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Support
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Target
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TransformUtils
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Vectorize
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native
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)
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endif()
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add_definitions( -DLLVM_VERSION_INFO=\"${PACKAGE_VERSION}\" )
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set(SOURCES
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libllvm.cpp
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)
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if(NOT DEFINED LLVM_EXPORTED_SYMBOL_FILE)
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if( WIN32 AND NOT CYGWIN )
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message(FATAL_ERROR "Auto-generation not implemented for Win32 without GNU utils. Please specify LLVM_EXPORTED_SYMBOL_FILE.")
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endif()
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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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set(LLVM_EXPORTED_SYMBOL_FILE ${CMAKE_BINARY_DIR}/libllvm.exports)
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llvm_map_components_to_libnames(LIB_NAMES ${LLVM_DYLIB_COMPONENTS})
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foreach (lib ${LIB_NAMES})
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set(LIB_DIR ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/lib)
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set(LIB_NAME ${LIB_DIR}/${CMAKE_STATIC_LIBRARY_PREFIX}${lib})
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set(LIB_PATH ${LIB_NAME}${CMAKE_STATIC_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 ${LIB_EXPORTS_PATH}
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COMMAND nm ${LIB_PATH} | awk "/T _LLVM/ || /T LLVM/ { print $3 }" | sort -u | sed -e "s/^_//g" > ${LIB_EXPORTS_PATH}
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WORKING_DIRECTORY ${LIB_DIR}
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DEPENDS ${lib}
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COMMENT "Generating Export list for ${lib}..."
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VERBATIM )
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endforeach ()
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add_custom_command(OUTPUT ${LLVM_EXPORTED_SYMBOL_FILE}
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COMMAND cat ${LLVM_DYLIB_REQUIRED_EXPORTS} > ${LLVM_EXPORTED_SYMBOL_FILE}
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WORKING_DIRECTORY ${LIB_DIR}
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DEPENDS ${LLVM_DYLIB_REQUIRED_EXPORTS}
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COMMENT "Generating combined export list...")
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endif()
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add_llvm_library(LLVM SHARED ${SOURCES})
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if("${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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list(REMOVE_DUPLICATES LIB_NAMES)
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set(LIB_NAMES -Wl,--whole-archive ${LIB_NAMES} -Wl,--no-whole-archive)
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endif()
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target_link_libraries(LLVM ${cmake_2_8_12_PRIVATE} ${LIB_NAMES})
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add_dependencies(LLVM ${LLVM_EXPORTED_SYMBOL_FILE})
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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 ${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR} -current_version ${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}")
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endif()
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