?RCS: $Id: d_perror.U 167 2013-05-08 17:58:00Z rmanfredi $
?RCS:
?RCS: Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi
?RCS: 
?RCS: You may redistribute only under the terms of the Artistic License,
?RCS: as specified in the README file that comes with the distribution.
?RCS: You may reuse parts of this distribution only within the terms of
?RCS: that same Artistic License; a copy of which may be found at the root
?RCS: of the source tree for dist 4.0.
?RCS:
?RCS: $Log: d_perror.U,v $
?RCS: Revision 3.0.1.1  1994/08/29  16:11:38  ram
?RCS: patch32: always define HAS_PERROR even when not used in C code
?RCS:
?RCS: Revision 3.0  1993/08/18  12:06:45  ram
?RCS: Baseline for dist 3.0 netwide release.
?RCS:
?MAKE:d_perror: Trylink cat
?MAKE:	-pick add $@ %<
?S:d_perror:
?S:	This variable conditionally remaps perror to a null action and
?S:	defines the symbol HAS_PERROR, which indicates to the C program
?S:	that the perror() routine is not available to print system
?S:	error messages.
?S:.
?C:HAS_PERROR ~ %<:
?C:	This symbol, if defined, indicates that the perror() routine is
?C:	available to print system error messages. If not defined, you should
?C:	use your own diagnostic routine...
?C:.
?C:perror ~ %<:
?C:	This symbol is maped to null if the  perror() routine is not
?C:	available to print system error messages.
?C:.
?H:?%<:#$d_perror HAS_PERROR	/**/
?H:?%<:#ifndef HAS_PERROR
?H:?%<:#define perror(s)	;		/* mapped to a null statement */
?H:?%<:#endif
?H:.
?LINT:set d_perror
: see if perror exists
$cat >try.c <<EOC
#include <stdio.h>
int main(void)
{
	perror("error");
	return 0;
}
EOC
cyn=perror
set d_perror
eval $trylink