Re: [Bug-gnulib] strncasecmp and AIX

[Paul Eggert]

>> I always feel much better about such things to use the system
>> declaration if present.
>
> Agreed. But if the declaration is in a stone-age file like <strings.h>,
> and only on one system (AIX), I feel safe also without this declaration.

It wouldn't be only on one system, as <strings.h> and strcasecmp are
part of the XSI extension to POSIX 1003.1-2001.  See:

http://www.opengroup.org/onlinepubs/007904975/functions/strcasecmp.html

There used to be hosts whose standard headers defined "strcasecmp"
with a different signature than the now-standard one, and I assume
that use of "strcase.h" would cause trouble on such hosts.  Examples
include SunOS 4.1.x and CONVEX OS 9.1.  See:

http://groups.google.com/groups?selm=matt.767985934%40koala.x.org
http://groups.google.com/groups?selm=199405091610.MAA14752%40gemini.larc.nasa.gov

(dated about 10 years ago, in both cases).  I doubt whether this would
come up in any modern host, though, and I'd let sleeping dogs lie
unless they bark.