REG_BASIC
if ((rc = regcomp(&rp, re, REG_BASIC)) != 0) {
{ p6, REG_BASIC },
flags = REG_BASIC;
if ((status = regcomp(&preg, expect, REG_BASIC)) != 0) {
if (regcomp(&cre, re, REG_BASIC|REG_NOSUB) != 0)
int regcomp_flags = REG_BASIC; /* regex compilation flags */
regcomp(&cre, nl_langinfo(YESEXPR), REG_BASIC) != 0) {