define: DUK_USE_SETJMP
feature_enables: DUK_OPT_SETJMP
feature_no_default: true  # provided by platform unless forced
introduced: 1.1.0
removed: 1.5.0
default: true
tags:
  - portability
description: >
  Use setjmp/longjmp for long control transfers.  This is the most portable
  option for long control transfers.

  The downside of setjmp/longjmp is that signal mask saving behavior is not
  specified and varies between platforms.  Signal mask saving may have a
  significant performance impact so you may want to force a specific provider
  if performance matters for your application.  (This is the case for OSX,
  for instance.)

  Removed in Duktape 1.5.0: edit duk_config.h directly.