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47 lines
1.8 KiB
CMake
47 lines
1.8 KiB
CMake
set(LLVM_BINUTILS_INCDIR "" CACHE PATH
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"PATH to binutils/include containing plugin-api.h for gold plugin.")
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if( NOT LLVM_BINUTILS_INCDIR )
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# Nothing to say.
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elseif( NOT EXISTS "${LLVM_BINUTILS_INCDIR}/plugin-api.h" )
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message(STATUS "plugin-api.h not found. gold plugin excluded from the build.")
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else()
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include_directories( ${LLVM_BINUTILS_INCDIR} )
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# Because off_t is used in the public API, the largefile parts are required for
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# ABI compatibility.
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add_definitions( -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 )
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set(LLVM_LINK_COMPONENTS support)
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add_llvm_loadable_module(LLVMgold
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gold-plugin.cpp
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)
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# Makefile.rules contains a special cases for OpenBSD, Darwin and
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# Windows. We restrict ourselves to Linux for the time being.
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set(srcexp ${CMAKE_CURRENT_SOURCE_DIR}/gold.exports)
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add_custom_command(OUTPUT exportsfile
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COMMAND echo "{" > exportsfile
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COMMAND grep -q "\\<" ${srcexp} && echo " global:" >> exportsfile || :
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COMMAND sed -e "s/$/;/" -e "s/^/ /" < ${srcexp} >> exportsfile
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COMMAND echo " local: *;" >> exportsfile
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COMMAND echo "};" >> exportsfile
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DEPENDS ${srcexp}
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VERBATIM
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COMMENT "Creating export file for gold plugin")
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add_custom_target(gold_exports DEPENDS exportsfile)
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set_property(DIRECTORY APPEND
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PROPERTY ADDITIONAL_MAKE_CLEAN_FILES exportsfile)
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# Force re-linking when the exports file changes. Actually, it
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# forces recompilation of gold-plugin.cpp. The LINK_DEPENDS target
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# property only works for makefile-based generators.
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set_property(SOURCE gold-plugin.cpp APPEND PROPERTY
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OBJECT_DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/exportsfile)
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target_link_libraries(LLVMgold LTO
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-Wl,--version-script,${CMAKE_CURRENT_BINARY_DIR}/exportsfile)
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add_dependencies(LLVMgold gold_exports)
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endif()
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