In article <87r74km6hc.fsf@freemail.hu>,
Magnus Henoch  <mange@freemail.hu> wrote:
>Compiling the following program with compiler switches -Wall
>-Werror fails with "warning: subscript has type `char'" for the
>isspace macro expansion.
>
>#include <stdio.h>
>#include <ctype.h>
>
>int main(void)
>{
>  int c;
>  char d;
>
>  c = getchar();
>  if (c != EOF) {
>    d = c;
>    if (isspace(d))
>      printf("'%c' is whitespace\n", d);
>    else
>      printf("'%c' is not whitespace\n", d);
>  }
>  return 0;
>}
>
>The workarounds are obvious, but is this a bug or a feature?  I ran
>into this while compiling linphone 1.3.3; should linphone or NetBSD be
>changed?

It is a feature. Linphone should be fixed to read isspace((unsigned char)d).

christos