include(AddSwift)

add_custom_target(SwiftUnitTests)

set_target_properties(SwiftUnitTests PROPERTIES FOLDER "Tests")

function(add_swift_unittest test_dirname)
  # *NOTE* Even though "add_unittest" does not have llvm in its name, it is a
  # function defined by AddLLVM.cmake.
  add_unittest(SwiftUnitTests ${test_dirname} ${ARGN})

  # TODO: _add_variant_c_compile_link_flags and these tests should share some
  # sort of logic.
  #
  # *NOTE* The unittests are never built for the target, so we always enable LTO
  # *if we are asked to.
  _compute_lto_flag("${SWIFT_TOOLS_ENABLE_LTO}" _lto_flag_out)
  if (_lto_flag_out)
    set_property(TARGET "${test_dirname}" APPEND_STRING PROPERTY COMPILE_FLAGS " ${_lto_flag_out} ")
    set_property(TARGET "${test_dirname}" APPEND_STRING PROPERTY LINK_FLAGS " ${_lto_flag_out} ")
  endif()

  if(SWIFT_BUILT_STANDALONE AND NOT "${CMAKE_CFG_INTDIR}" STREQUAL ".")
    # Replace target references with full paths, so that we use LLVM's
    # build configuration rather than Swift's.
    get_target_property(libnames ${test_dirname} LINK_LIBRARIES)

    set(new_libnames)
    foreach(dep ${libnames})
      if("${dep}" MATCHES "^(LLVM|Clang|gtest)" AND NOT "${CMAKE_SYSTEM_NAME}" STREQUAL "Windows")
        list(APPEND new_libnames "${LLVM_LIBRARY_OUTPUT_INTDIR}/lib${dep}.a")
      else()
        list(APPEND new_libnames "${dep}")
      endif()
    endforeach()

    set_property(TARGET ${test_dirname} PROPERTY LINK_LIBRARIES ${new_libnames})
    swift_common_llvm_config(${test_dirname} support)
  endif()

  if("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin")
    set_property(TARGET "${test_dirname}" APPEND_STRING PROPERTY
      LINK_FLAGS " -Xlinker -rpath -Xlinker ${SWIFT_LIBRARY_OUTPUT_INTDIR}/swift/macosx")
  elseif("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux")
    set_property(TARGET "${test_dirname}" APPEND_STRING PROPERTY
      LINK_FLAGS " -latomic")
  endif()

  find_program(LDLLD_PATH "ld.lld")
  # Strangely, macOS finds lld and then can't find it when using -fuse-ld=
  if(SWIFT_ENABLE_LLD_LINKER AND LDLLD_PATH AND NOT APPLE)
    set_property(TARGET "${test_dirname}" APPEND_STRING PROPERTY
      LINK_FLAGS " -fuse-ld=lld")
  elseif(SWIFT_ENABLE_GOLD_LINKER AND
     "${SWIFT_SDK_${SWIFT_HOST_VARIANT_SDK}_OBJECT_FORMAT}" STREQUAL "ELF")
    set_property(TARGET "${test_dirname}" APPEND_STRING PROPERTY
      LINK_FLAGS " -fuse-ld=gold")
  endif()

  if(SWIFT_ANALYZE_CODE_COVERAGE)
    set_property(TARGET "${test_dirname}" APPEND_STRING PROPERTY
      LINK_FLAGS " -fprofile-instr-generate -fcoverage-mapping")
  endif()

  if(SWIFT_RUNTIME_USE_SANITIZERS)
    if("Thread" IN_LIST SWIFT_RUNTIME_USE_SANITIZERS)
      set_property(TARGET "${test_dirname}" APPEND_STRING PROPERTY COMPILE_FLAGS
        " -fsanitize=thread")
      set_property(TARGET "${test_dirname}" APPEND_STRING PROPERTY
        LINK_FLAGS " -fsanitize=thread")
    endif()
  endif()
endfunction()