dnl CF_PROG_EGREP version: 2 updated: 2015/04/18 08:56:57
dnl -------------
dnl AC_PROG_EGREP was introduced in autoconf 2.53.
dnl This macro adds a check to ensure the script found something.
AC_DEFUN([CF_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=$ac_cv_prog_egrep
	AC_SUBST([EGREP])
	test -z "$EGREP" && AC_MSG_ERROR(No egrep program found)
])dnl
