settings.gni

if (is_clang) {
  import("//build/toolchain/clang.gni")
}

declare_args() {
  # Desired version of Visual Studio.
  # If visual_studio_path is set, this must be
  # the version of the VS installation at the visual_studio_path.
  #
  # Use "2013" for Visual Studio 2013 or "latest" for automatically
  # choosing the highest version (visual_studio_path must be unset in
  # this case).
  visual_studio_version = "latest"

  # The path of your MSVC installation.
  #
  # If this is set you must set visual_studio_version as well.
  # Autodetected based on visual_studio_version.
  visual_studio_path = ""

  # Windows SDK version to use.
  # Can either be a full Windows 10 SDK number (e.g. 10.0.10240.0),
  # "8.1" for the Windows 8.1 SDK or "default" to use the VS default version.
  windows_sdk_version = "default"

  # Microsoft compiler version number clang-cl will report in _MSC_VER
  # (Defaults to the default version associated with the chosen VS version.)
  clang_msc_ver = 0

  # Allows us to avoid multiple toolchain.py invocations for multi-toolchain builds.
  cached_toolchain_data = ""
}

assert(visual_studio_version != "", "visual_studio_version must be non-empty")
assert(visual_studio_path == "" || visual_studio_version != "latest",
       "You must set visual_studio_version if you set visual_studio_path")

if (is_clang) {
  sys_include_prefix = "-imsvc"
  _clang_base_path_arg = clang_base_path
  _clang_msc_ver = "" + clang_msc_ver
} else {
  # MSVC doesn't have the concept of system headers.
  sys_include_prefix = "/I"
  _clang_base_path_arg = ""
  _clang_msc_ver = ""
}

if (host_os == "win") {
  clang_cl = "clang-cl.exe"
} else {
  clang_cl = "clang-cl"
}

if (visual_studio_path == "") {
  # can't pass empty args
  visual_studio_path = "default"
}

if (cached_toolchain_data != "") {
  toolchain_data = cached_toolchain_data
} else {
  toolchain_data = exec_script("toolchain.py",
                               [
                                 "setup_toolchain",
                                 visual_studio_version,
                                 visual_studio_path,
                                 sys_include_prefix,
                                 windows_sdk_version,

                                 # Don't use clang_base_path directly, so we can
                                 # skip clang detection if not needed
                                 # (i.e. !is_clang).
                                 _clang_base_path_arg,
                                 _clang_msc_ver,
                               ],
                               "scope")
}

visual_studio_version = toolchain_data.visual_studio_version
visual_studio_path = toolchain_data.visual_studio_path

# Full path to the Windows SDK, not including a backslash at the end.
windows_sdk_path = toolchain_data.windows_sdk_path

# Value of the _MSC_VER variable.
# see: https://msdn.microsoft.com/en-us/library/b0084kay.aspx
msc_ver = toolchain_data.msc_ver

# Value of the _MSC_FULL_VER variable.
# see: https://msdn.microsoft.com/en-us/library/b0084kay.aspx
msc_full_ver = toolchain_data.msc_full_ver

if (is_clang) {
  win_clang_version = toolchain_data.clang_version
}

# current_toolchain_data: Settings specific to current_os/current_cpu
if (current_os == "win") {
  if (current_cpu == "x86") {
    assert(defined(toolchain_data.x86))
    current_toolchain_data = toolchain_data.x86
  } else if (current_cpu == "x64") {
    assert(defined(toolchain_data.x64))
    current_toolchain_data = toolchain_data.x64
  } else if (current_cpu == "arm") {
    assert(defined(toolchain_data.arm))
    current_toolchain_data = toolchain_data.arm
  } else if (current_cpu == "arm64") {
    assert(defined(toolchain_data.arm64))
    current_toolchain_data = toolchain_data.arm64
  }
} else if (current_os == "winuwp") {
  if (current_cpu == "x86") {
    assert(defined(toolchain_data.x86_uwp))
    current_toolchain_data = toolchain_data.x86_uwp
  } else if (current_cpu == "x64") {
    assert(defined(toolchain_data.x64_uwp))
    current_toolchain_data = toolchain_data.x64_uwp
  } else if (current_cpu == "arm") {
    assert(defined(toolchain_data.arm_uwp))
    current_toolchain_data = toolchain_data.arm_uwp
  } else if (current_cpu == "arm64") {
    assert(defined(toolchain_data.arm64_uwp))
    current_toolchain_data = toolchain_data.arm64_uwp
  }
}