Issue 0014.01: Is setjmp a macro or a function?

This issue has been automatically converted from the original issue lists and some formatting may not have been preserved.

Authors: Max K. Goff, WG14
Date: 1992-12-10
Reference document: X3J11/90-049
Submitted against: C90
Status: Closed
Converted from: dr.htm, dr_014.html

X/Open Reference Number KRT3.159.1

There are conflicting descriptions of the setjmp() interface in ISO 9899:1990. In subclause 7.6 on page 118, line 8, it is stated that “It is unspecified whether setjmp is a macro or an identifier declared with external linkage.” Throughout the rest of the standard, however, it is referred to as “the setjmp macro”; in addition, the rationale document states that setjmp must be implemented as a macro. Please clarify whether setjmp must be implemented as a macro, or may be a function as well as a macro, or may just be a function.

Comment from WG14 on 1997-09-23:

Response

The standard states that setjmp can be either a macro or a function. It is referred to as “the setjmp macro” just to avoid longwindedness. The rationale document is incorrect in saying that it must be a macro.