1 set(LLVM_BINUTILS_INCDIR "" CACHE PATH 2 "PATH to binutils/include containing plugin-api.h for gold plugin.") 3 4 if( NOT LLVM_BINUTILS_INCDIR ) 5 # Nothing to say. 6 elseif( NOT EXISTS "${LLVM_BINUTILS_INCDIR}/plugin-api.h" ) 7 message(STATUS "plugin-api.h not found. gold plugin excluded from the build.") 8 else() 9 include_directories( ${LLVM_BINUTILS_INCDIR} ) 10 11 # Because off_t is used in the public API, the largefile parts are required for 12 # ABI compatibility. 13 add_definitions( -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 ) 14 15 set(LLVM_LINK_COMPONENTS support) 16 17 add_llvm_loadable_module(LLVMgold 18 gold-plugin.cpp 19 ) 20 21 # Makefile.rules contains a special cases for OpenBSD, Darwin and 22 # Windows. We restrict ourselves to Linux for the time being. 23 set(srcexp ${CMAKE_CURRENT_SOURCE_DIR}/gold.exports) 24 add_custom_command(OUTPUT exportsfile 25 COMMAND echo "{" > exportsfile 26 COMMAND grep -q "\\<" ${srcexp} && echo " global:" >> exportsfile || : 27 COMMAND sed -e "s/$/;/" -e "s/^/ /" < ${srcexp} >> exportsfile 28 COMMAND echo " local: *;" >> exportsfile 29 COMMAND echo "};" >> exportsfile 30 DEPENDS ${srcexp} 31 VERBATIM 32 COMMENT "Creating export file for gold plugin") 33 add_custom_target(gold_exports DEPENDS exportsfile) 34 set_property(DIRECTORY APPEND 35 PROPERTY ADDITIONAL_MAKE_CLEAN_FILES exportsfile) 36 37 # Force re-linking when the exports file changes. Actually, it 38 # forces recompilation of gold-plugin.cpp. The LINK_DEPENDS target 39 # property only works for makefile-based generators. 40 set_property(SOURCE gold-plugin.cpp APPEND PROPERTY 41 OBJECT_DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/exportsfile) 42 43 target_link_libraries(LLVMgold LTO 44 -Wl,--version-script,${CMAKE_CURRENT_BINARY_DIR}/exportsfile) 45 add_dependencies(LLVMgold gold_exports) 46 endif() 47
