declare_args() {
  # Whether to build with debug information.
  is_debug = false

  # Whether to build with tsan.
  use_tsan = false

  # Whether to build with ubsan.
  use_ubsan = false

  # Whether to build with asan.
  use_asan = false

  # Whether to enable assertions.
  llvm_enable_assertions = true

  # Whether to enable expensive checks.
  llvm_enable_expensive_checks = false

  # Whether to build with ThinLTO.
  use_thinlto = false

  # Max jobs per ThinLTO link.
  max_jobs_per_lto_link = 8
}

# args that depend on other args must live in a later declare_args() block.
declare_args() {
  # Whether to build with optimizations.
  is_optimized = !is_debug
}