find_first_existing_vc_file("${LLVM_MAIN_SRC_DIR}" llvm_vc)
find_first_existing_vc_file("${FLANG_SOURCE_DIR}" flang_vc)

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

set(generate_vcs_version_script "${LLVM_CMAKE_DIR}/GenerateVersionFromVCS.cmake")

if(llvm_vc AND LLVM_APPEND_VC_REV)
  set(llvm_source_dir ${LLVM_MAIN_SRC_DIR})
endif()
if(flang_vc AND LLVM_APPEND_VC_REV)
  set(flang_source_dir ${FLANG_SOURCE_DIR})
endif()
 
# Create custom target to generate the VC revision include.
add_custom_command(OUTPUT "${version_inc}"
  DEPENDS "${llvm_vc}" "${flang_vc}" "${generate_vcs_version_script}"
  COMMAND ${CMAKE_COMMAND} "-DNAMES=\"LLVM;FLANG\""
                           "-DLLVM_SOURCE_DIR=${llvm_source_dir}"
                           "-DFLANG_SOURCE_DIR=${flang_source_dir}"
                           "-DHEADER_FILE=${version_inc}"
                           "-DLLVM_FORCE_VC_REVISION=${LLVM_FORCE_VC_REVISION}"
                           "-DLLVM_FORCE_VC_REPOSITORY=${LLVM_FORCE_VC_REPOSITORY}"
                           -P "${generate_vcs_version_script}")

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

if(FLANG_VENDOR)
  set_source_files_properties(Version.cpp
    PROPERTIES COMPILE_DEFINITIONS "FLANG_VENDOR=\"${FLANG_VENDOR} \"")
endif()


add_flang_library(FortranCommon
  Fortran.cpp
  Fortran-features.cpp
  default-kinds.cpp
  idioms.cpp
  Version.cpp
  ${version_inc}

  LINK_COMPONENTS
  Support
)