1set(LLVM_BINUTILS_INCDIR "" CACHE PATH
2  "PATH to binutils/include containing plugin-api.h for gold plugin.")
3
4if( NOT LLVM_BINUTILS_INCDIR )
5  # Nothing to say.
6elseif( NOT EXISTS "${LLVM_BINUTILS_INCDIR}/plugin-api.h" )
7  message(STATUS "plugin-api.h not found. gold plugin excluded from the build.")
8else()
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)
46endif()
47