?RCS: $Id$
?RCS:
?RCS: Copyright (c) 1991-1997, 2004-2006, 2012 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:
?MAKE:ptrsize: Assert Myread cat rm_try +cc +ccflags echo n c
?MAKE:	-pick add $@ %<
?S:ptrsize:
?S:	This variable contains the value of the PTRSIZE symbol, which
?S:	indicates to the C program how many bytes there are in a pointer.
?S:.
?C:PTRSIZE:
?C:	This symbol contains the size of a pointer, so that the C preprocessor
?C:	can make decisions based on it.
?C:.
?H:#define PTRSIZE $ptrsize
?H:.
?T:size
: check for length of pointer
echo " "
$echo $n "Checking to see how big your pointers are...$c" >&4
for size in 2 4 8 16 error; do
	$cat >try.c <<EOCP
#include "static_assert.h"
char *foo;
int main()
{
	STATIC_ASSERT($size == sizeof(foo));
	return 0;
}
EOCP
	if $cc -c $ccflags try.c >/dev/null 2>&1; then break; fi
done
case "$size" in
error)
	echo " cannot compute it." >&4
	dflt=4
	rp="What is the size of a pointer type (in bytes)?"
	. ./myread
	ptrsize="$ans"
	;;
*)
	echo " $size bytes." >&4
	ptrsize=$size
	;;
esac
$rm_try