tools/llvm-shlib/CMakeLists.txt

   1 # This tool creates a shared library from the LLVM libraries. Generating this
   2 # library is enabled by setting LLVM_BUILD_LLVM_DYLIB=yes on the CMake
   3 # commandline. By default the shared library only exports the LLVM C API.
   4
   5
   6 # You can configure which libraries from LLVM you want to include in the shared
   7 # library by setting LLVM_DYLIB_COMPONENTS to a semi-colon delimited list of
   8 # LLVM components. All compoenent names handled by llvm-config are valid.
   9
  10 if(NOT DEFINED LLVM_DYLIB_COMPONENTS)
  11   set(LLVM_DYLIB_COMPONENTS
  12     ${LLVM_TARGETS_TO_BUILD}
  13     Analysis
  14     BitReader
  15     BitWriter
  16     CodeGen
  17     Core
  18     DebugInfoDWARF
  19     DebugInfoPDB
  20     ExecutionEngine
  21     IPA
  22     IPO
  23     IRReader
  24     InstCombine
  25     Instrumentation
  26     Interpreter
  27     Linker
  28     MCDisassembler
  29     MCJIT
  30     ObjCARCOpts
  31     Object
  32     ScalarOpts
  33     Support
  34     Target
  35     TransformUtils
  36     Vectorize
  37     native
  38     )
  39 endif()
  40
  41 add_definitions( -DLLVM_VERSION_INFO=\"${PACKAGE_VERSION}\" )
  42
  43 set(SOURCES
  44   libllvm.cpp
  45   )
  46
  47 llvm_map_components_to_libnames(LIB_NAMES ${LLVM_DYLIB_COMPONENTS})
  48
  49 if(NOT DEFINED LLVM_DYLIB_EXPORTED_SYMBOL_FILE)
  50
  51   if( WIN32 AND NOT CYGWIN )
  52     message(FATAL_ERROR "Auto-generation not implemented for Win32 without GNU utils. Please specify LLVM_EXPORTED_SYMBOL_FILE.")
  53   endif()
  54
  55   # To get the export list for a single llvm library:
  56   # nm ${LIB_PATH} | awk "/T _LLVM/ { print $3 }" | sort -u | sed -e "s/^_//g" > ${LIB_PATH}.exports
  57
  58   set(LLVM_EXPORTED_SYMBOL_FILE ${CMAKE_BINARY_DIR}/libllvm.exports)
  59
  60   if (NOT LLVM_DYLIB_EXPORT_ALL)
  61     foreach (lib ${LIB_NAMES})
  62       set(LIB_DIR ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/lib${LLVM_LIBDIR_SUFFIX})
  63       set(LIB_NAME ${LIB_DIR}/${CMAKE_STATIC_LIBRARY_PREFIX}${lib})
  64       set(LIB_PATH ${LIB_NAME}${CMAKE_STATIC_LIBRARY_SUFFIX})
  65       set(LIB_EXPORTS_PATH ${LIB_NAME}.exports)
  66       list(APPEND LLVM_DYLIB_REQUIRED_EXPORTS ${LIB_EXPORTS_PATH})
  67
  68
  69       add_custom_command(OUTPUT ${LIB_EXPORTS_PATH}
  70         COMMAND nm ${LIB_PATH} | awk "/T _LLVM/ || /T LLVM/ { print $3 }" | sort -u | sed -e "s/^_//g" > ${LIB_EXPORTS_PATH}
  71         WORKING_DIRECTORY ${LIB_DIR}
  72         DEPENDS ${lib}
  73         COMMENT "Generating Export list for ${lib}..."
  74         VERBATIM )
  75     endforeach ()
  76   endif()
  77
  78   if (LLVM_DYLIB_EXPORT_ALL)
  79     add_custom_command(OUTPUT ${LLVM_EXPORTED_SYMBOL_FILE}
  80       COMMAND echo \"LLVM*\" > ${LLVM_EXPORTED_SYMBOL_FILE} && echo \"_Z*llvm*\" >> ${LLVM_EXPORTED_SYMBOL_FILE}
  81       WORKING_DIRECTORY ${LIB_DIR}
  82       DEPENDS ${LLVM_DYLIB_REQUIRED_EXPORTS}
  83       COMMENT "Generating combined export list...")
  84   else()
  85     add_custom_command(OUTPUT ${LLVM_EXPORTED_SYMBOL_FILE}
  86       COMMAND cat ${LLVM_DYLIB_REQUIRED_EXPORTS} > ${LLVM_EXPORTED_SYMBOL_FILE}
  87       WORKING_DIRECTORY ${LIB_DIR}
  88       DEPENDS ${LLVM_DYLIB_REQUIRED_EXPORTS}
  89       COMMENT "Generating combined export list...")
  90   endif()
  91
  92   add_custom_target(libLLVMExports DEPENDS ${LLVM_EXPORTED_SYMBOL_FILE})
  93 else()
  94   set(LLVM_EXPORTED_SYMBOL_FILE ${LLVM_DYLIB_EXPORTED_SYMBOL_FILE})
  95   add_custom_target(libLLVMExports DEPENDS ${LLVM_EXPORTED_SYMBOL_FILE})
  96 endif()
  97
  98 add_llvm_library(LLVM SHARED ${SOURCES})
  99
 100 list(REMOVE_DUPLICATES LIB_NAMES)
 101 if("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux") # FIXME: It should be "GNU ld for elf"
 102   # GNU ld doesn't resolve symbols in the version script.
 103   set(LIB_NAMES -Wl,--whole-archive ${LIB_NAMES} -Wl,--no-whole-archive)
 104 elseif("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin")
 105   set(LIB_NAMES -Wl,-all_load ${LIB_NAMES})
 106 endif()
 107
 108 target_link_libraries(LLVM PRIVATE ${LIB_NAMES})
 109
 110 add_dependencies(LLVM libLLVMExports)
 111
 112 if (APPLE)
 113   set_property(TARGET LLVM APPEND_STRING PROPERTY
 114               LINK_FLAGS
 115               " -compatibility_version ${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR} -current_version ${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}")
 116 endif()
 117