lib/Basic/CMakeLists.txt

set(LLVM_LINK_COMPONENTS
  Core
  MC
  Support
  )

# Figure out if we can track VC revisions.
function(find_first_existing_file out_var)
  foreach(file ${ARGN})
    if(EXISTS "${file}")
      set(${out_var} "${file}" PARENT_SCOPE)
      return()
    endif()
  endforeach()
endfunction()

macro(find_first_existing_vc_file out_var path)
  set(git_path "${path}/.git")

  # Normally '.git' is a directory that contains a 'logs/HEAD' file that
  # is updated as modifications are made to the repository. In case the
  # repository is a Git submodule, '.git' is a file that contains text that
  # indicates where the repository's Git directory exists.
  if (EXISTS "${git_path}" AND NOT IS_DIRECTORY "${git_path}")
    FILE(READ "${git_path}" file_contents)
    if("${file_contents}" MATCHES "^gitdir: ([^\n]+)")
      # '.git' is indeed a link to the submodule's Git directory.
      # Use the path to that Git directory.
      set(git_path "${path}/${CMAKE_MATCH_1}")
    endif()
  endif()

  find_first_existing_file(${out_var}
    "${git_path}/logs/HEAD"  # Git or Git submodule
    "${path}/.svn/wc.db"     # SVN 1.7
    "${path}/.svn/entries"   # SVN 1.6
    )
endmacro()

find_first_existing_vc_file(llvm_vc "${LLVM_MAIN_SRC_DIR}")
find_first_existing_vc_file(clang_vc "${CLANG_SOURCE_DIR}")

# The VC revision include that we want to generate.
set(version_inc "${CMAKE_CURRENT_BINARY_DIR}/SVNVersion.inc")

set(get_svn_script "${LLVM_CMAKE_PATH}/GetSVN.cmake")

if(DEFINED llvm_vc AND DEFINED clang_vc)
  # Create custom target to generate the VC revision include.
  add_custom_command(OUTPUT "${version_inc}"
    DEPENDS "${llvm_vc}" "${clang_vc}" "${get_svn_script}"
    COMMAND
    ${CMAKE_COMMAND} "-DFIRST_SOURCE_DIR=${LLVM_MAIN_SRC_DIR}"
                     "-DFIRST_NAME=LLVM"
                     "-DSECOND_SOURCE_DIR=${CLANG_SOURCE_DIR}"
                     "-DSECOND_NAME=SVN"
                     "-DHEADER_FILE=${version_inc}"
                     -P "${get_svn_script}")

  # Mark the generated header as being generated.
  set_source_files_properties("${version_inc}"
    PROPERTIES GENERATED TRUE
               HEADER_FILE_ONLY TRUE)

  # Tell Version.cpp that it needs to build with -DHAVE_SVN_VERSION_INC.
  set_source_files_properties(Version.cpp
    PROPERTIES COMPILE_DEFINITIONS "HAVE_SVN_VERSION_INC")
else()
  # Not producing a VC revision include.
  set(version_inc)

  # Being able to force-set the SVN revision in cases where it isn't available
  # is useful for performance tracking, and matches compatibility from autoconf.
  if(SVN_REVISION)
    set_source_files_properties(Version.cpp
      PROPERTIES COMPILE_DEFINITIONS "SVN_REVISION=\"${SVN_REVISION}\"")
  endif()
endif()

add_clang_library(clangBasic
  Attributes.cpp
  Builtins.cpp
  CharInfo.cpp
  Cuda.cpp
  Diagnostic.cpp
  DiagnosticIDs.cpp
  DiagnosticOptions.cpp
  FileManager.cpp
  FileSystemStatCache.cpp
  IdentifierTable.cpp
  LangOptions.cpp
  MemoryBufferCache.cpp
  Module.cpp
  ObjCRuntime.cpp
  OpenMPKinds.cpp
  OperatorPrecedence.cpp
  SanitizerBlacklist.cpp
  SanitizerSpecialCaseList.cpp
  Sanitizers.cpp
  SourceLocation.cpp
  SourceManager.cpp
  SourceMgrAdapter.cpp
  TargetInfo.cpp
  Targets.cpp
  TokenKinds.cpp
  Version.cpp
  VersionTuple.cpp
  VirtualFileSystem.cpp
  Warnings.cpp
  XRayLists.cpp
  ${version_inc}
  )