?RCS: $Id: charsize.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: charsize.U,v $
?RCS: Revision 3.0.1.1  1994/10/29  16:07:13  ram
?RCS: patch36: added ?F: line for metalint file checking
?RCS:
?RCS: Revision 3.0  1993/08/18  12:05:34  ram
?RCS: Baseline for dist 3.0 netwide release.
?RCS:
?MAKE:charsize: Assert Myread cat rm +cc +ccflags echo n c
?MAKE:	-pick add $@ %<
?S:charsize:
?S:	This variable contains the value of the CHARSIZE symbol, which
?S:	indicates to the C program how many bytes there are in a character.
?S:.
?C:CHARSIZE:
?C:	This symbol contains the size of a char, so that the C preprocessor
?C:	can make decisions based on it.
?C:.
?H:#define CHARSIZE $charsize
?H:.
?T:size s
: check for length of character
echo " "
$echo $n "Checking to see how big your characters are...$c" >&4
for size in 1 2 4 8 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=1
	rp="What is the size of a character (in bytes)?"
	. ./myread
	charsize="$ans"
	;;
*)
	case "$size" in
	1) s='';;
	*) s='s';;
	esac
	echo " $size byte$s." >&4
	charsize=$size
	;;
esac
$rm -f try.*