ref: 1fe2c325416d8affab446a50397da8b43f1a57c6
dir: /sys/src/ape/lib/regexp/regerror.c/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "regexp.h"
void
regerror(char *s)
{
char buf[132];
strcpy(buf, "regerror: ");
strcat(buf, s);
strcat(buf, "\n");
fwrite(buf, 1, strlen(buf), stderr);
exit(1);
}