1#define	MASK ((1 << __CHAR_BIT__) - 1)
2
3void foo(void)
4{
5	_Static_assert((char) -1 == (-1 & MASK), "plain char is not unsigned");
6}
7
8/*
9 * check-name: funsigned-char
10 * check-command: sparse -funsigned-char -Wno-decl $file
11 */
12