?RCS: $Id: i_net_errno.U,v $
?RCS:
?RCS: You may redistribute only under the terms of the Artistic Licence,
?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 Licence; a copy of which may be found at the root
?RCS: of the source tree for dist 3.0.
?RCS:
?RCS: $Log: i_net_errno.U,v $
?RCS:
?MAKE:i_neterrno: Inhdr cc ccflags rm
?MAKE:	-pick add $@ %<
?S:i_neterrno:
?S:	This variable conditionally defines the I_NET_ERRNO symbol, which
?S:	indicates to the C program that <net/errno.h> exists and should
?S:	be included.
?S:.
?C:I_NET_ERRNO:
?C:	This symbol, if defined, indicates that <net/errno.h> exists and 
?C:	should be included.
?C:.
?H:#$i_neterrno I_NET_ERRNO		/**/
?H:.
?LINT:set i_neterrno
: see if net/errno.h is available
set net/errno.h i_neterrno
eval $inhdr
: Unfortunately, it causes problems on some systems.  Arrgh.
case '$i_neterrno' in
'define') echo "<net/errno.h> found."
    cat > try.c <<'EOM'
#include <stdio.h>
#include <errno.h>
#include <net/errno.h>
int func()
{
int x;
x = ENOTSOCK;
return x;
}
EOM
    if $cc $ccflags -c try.c >/dev/null 2>&1; then
	i_neterrno="$define"
    else
	echo "But it causes problems, so we won't include it"
	i_neterrno="$undef"
    fi
    $rm -f try.* try
    ;;
esac