Hi Dave, On Mon, 28 Sep 2020 at 16:15, Dave Martin <Dave.Martin@xxxxxxx> wrote: > > On Mon, Sep 28, 2020 at 11:55:08PM +1000, G. Branden Robinson wrote: > > Hi, Alex! > > > > At 2020-09-28T15:48:14+0200, Alejandro Colomar wrote: > > > > Where does this arbitrary-looking list of headers come from? > > > > > > There are two parts: left to the ';', and right to the ';'. > > > > > > Left: The canonical C standard header, and the canonical POSIX header, > > > in alphabetical order. > > > > > > Right: All other headers that shall define the header, according to > > > either the C or the POSIX standards, in alphabetical order. > > To clarify, does POSIX _guarantee_ that all of those headers define this > type? (I admit I'm too lazy to search through the POSIX standard for an > answer to this). > > If not, this list would serve only to legitimise bad habits and it may > be better to leave it out. As I think Alex has clarified, the info about headers is being taken from POSIX. > > That's not a bad scheme but it is not inferable from the current man > > page text; I almost commented on the inconsistency in one of my earlier > > messages but deemed it out of scope. Please document it, perhaps in an > > introductory paragraph at the top of the Description section. > > Ack, I think it would be better to state this explicity rather than > having some terse syntax that people need to understand. Yes, I think some more explanatory text is probably needed. This page is still very much a work in progress. > IIUC, a program intended to be fully portable between C implementations > must include <stddef.h>, not rely on one of the others. Just to note a point here: my main concern is portability across POSIX systems. Thanks, Michael -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/
