CMakeLists.txt revision 4839ded3bdf83a47c581b818e295669533cc9a9b 
1set(LLVM_BINUTILS_INCDIR "/usr/include" CACHE PATH
2  "PATH to binutils/include containing plugin-api.h for gold plugin.")
3
4if( NOT EXISTS "${LLVM_BINUTILS_INCDIR}/plugin-api.h" )
5  message(STATUS "plugin-api.h not found. gold plugin excluded from the build.")
6else()
7  include_directories( ${LLVM_BINUTILS_INCDIR} )
8
9  # Because off_t is used in the public API, the largefile parts are required for
10  # ABI compatibility.
11  add_definitions( -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 )
12
13  set(LLVM_LINK_COMPONENTS support)
14
15  add_llvm_loadable_module(LLVMgold
16    gold-plugin.cpp
17    )
18
19  # Makefile.rules contains a special cases for OpenBSD, Darwin and
20  # Windows. We restrict ourselves to Linux for the time being.
21  set(srcexp ${CMAKE_CURRENT_SOURCE_DIR}/gold.exports)
22  add_custom_command(OUTPUT exportsfile
23    COMMAND echo "{" > exportsfile
24    COMMAND grep -q "\\<" ${srcexp} && echo "  global:" >> exportsfile || :
25    COMMAND sed -e "s/$/;/" -e "s/^/    /" < ${srcexp} >> exportsfile
26    COMMAND echo "  local: *;" >> exportsfile
27    COMMAND echo "};" >> exportsfile
28    DEPENDS ${srcexp}
29    VERBATIM
30    COMMENT "Creating export file for gold plugin")
31  add_custom_target(gold_exports DEPENDS exportsfile)
32  set_property(DIRECTORY APPEND
33    PROPERTY ADDITIONAL_MAKE_CLEAN_FILES exportsfile)
34
35  # Force re-linking when the exports file changes. Actually, it
36  # forces recompilation of gold-plugin.cpp. The LINK_DEPENDS target
37  # property only works for makefile-based generators.
38  set_property(SOURCE gold-plugin.cpp APPEND PROPERTY
39    OBJECT_DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/exportsfile)
40
41  target_link_libraries(LLVMgold LTO -Wl,--version-script,exportsfile)
42  add_dependencies(LLVMgold gold_exports)
43endif()
44