struct regex *re = scalloc(1, sizeof(struct regex));
re->pattern = sstrdup(pattern);
int options = PCRE_UTF8;
-#ifdef PCRE_HAS_UCP
/* We use PCRE_UCP so that \B, \b, \D, \d, \S, \s, \W, \w and some POSIX
* character classes play nicely with Unicode */
options |= PCRE_UCP;
-#endif
while (!(re->regex = pcre_compile2(pattern, options, &errorcode, &error, &offset, NULL))) {
/* If the error is that PCRE was not compiled with UTF-8 support we
* disable it and try again */