| # AC_PROG_EGREP | |
| # ------------- | |
| # This is predefined starting with Autoconf 2.54, so this conditional | |
| # definition can be removed once we require Autoconf 2.54 or later. | |
| m4_ifndef([AC_PROG_EGREP], [AC_DEFUN([AC_PROG_EGREP], | |
| [AC_CACHE_CHECK([for egrep], [ac_cv_prog_egrep], | |
| [if echo a | (grep -E '(a|b)') >/dev/null 2>&1 | |
| then ac_cv_prog_egrep='grep -E' | |
| else ac_cv_prog_egrep='egrep' | |
| fi]) | |
| EGREP=$ac_cv_prog_egrep | |
| AC_SUBST([EGREP]) | |
| ])]) |