@section @code{putchar}
@findex putchar
-POSIX specification: @url{http://www.opengroup.org/onlinepubs/9699919799/functions/putchar.html}
+POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/putchar.html}
Gnulib module: stdio, sigpipe