define: DUK_USE_REPL_SIGNBIT
introduced: 1.0.0
default: false
tags:
  - portability
description: >
  Provide a built-in replacement for signbit(), duk_repl_signbit.

  When enabled, define DUK_SIGNBIT as duk_repl_signbit.

# XXX: the dependency between DUK_USE_REPL_SIGNBIT and DUK_SIGNBIT
# is a bit awkward.