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define: DUK_OPT_UNDERSCORE_SETJMP
introduced: 1.1.0
removed: 1.5.0
tags:
- portability
description: >
Force _setjmp/_longjmp for long control transfers. This ensures signal
mask is not saved which can be a lot faster if setjmp/longjmp saves the
signal mask (this varies between platforms). See comments in
DUK_OPT_SETJMP.