Re: Compiling lposix.c (patch)

[David Jones <drj@...>]

On 5 Oct 2006, at 01:02, Glenn Maynard wrote:

> On Wed, Oct 04, 2006 at 04:29:15PM -0700, Sam Roberts wrote:

> > % grep CLK_TCK /usr/include/bits/time.h
> > #   define CLK_TCK ((__clock_t) __sysconf (2))  /* 2 is  
> > _SC_CLK_TCK */
> >
> > CLK_TCK has been around a while, I don't think linux is going to  
> > break
> > all that old software even if it isn't pedantically correct.
>
> Looks like a simple hack, but one that should be phased out in newer
> software.  It seems like using the sysconf interface really is the
> right thing to be doing, in any actively-maintained code--not  
> critical,
> but not an update I'd I'd expect to see much friction against.


Indeed.  It would seem, from a bit of googling, that CLK_TCK went  
(from the standards) a long time ago.  sysconf is a crucial  
cornerstone of POSIX, not an arcane interface.  Well, I suppose it  
might be both. :)

It was my understanding that most installations of GCC / glibc  
allowed posix programs to compiler using -pedantic as long as the  
posix programs were pedantically correct.  That is, they had a:

#define _POSIX_C_SOURCE 199209

declaration (or similar).  lposix.c should probably have one.  Good  
luck choosing the right one.

drj