This issue has been automatically converted from the original issue lists and some formatting may not have been preserved.
Authors: Clive Feather, WG14
Date: 1993-12-03
Submitted against: C90
Status: Fixed
Fixed in: C90 TC2
Converted from: dr.htm, dr_093.html
Item 30 - reservation of identifiers
Can a conforming freestanding implementation reserve identifiers? Subclause
5.1.2.1 states that only one identifier (the equivalent of main) is reserved
in a freestanding implementation. Subclause 7.1.3 states that certain
identifiers are reserved, even when the corresponding headers are not included.
This is a direct contradiction.
Comment from WG14 on 1997-09-23:
The Committee observes that conforming freestanding implementations tend to vary widely in the library facilities provided, and that the simple binary choice implied by the above text is really a continuum. It also notes that it is difficult to provide a C implementation with no reserved names (not even those beginning with two underscores). It is therefore felt to be unreasonable to restrict the names available to implementors of freestanding implementations compared with hosted implementations.
The Committee notes that certain freestanding programs (such as UNIX kernels)
have tended to use names such as exit, but agrees that existing practice
dictates that the authors of such programs must already be prepared to change
such names when using certain compilers.
In subclause 5.1.2.1, page 6, delete:
There are otherwise no reserved external identifiers.