# AST_PROG_EGREP # ------------- m4_ifndef([AST_PROG_EGREP], [AC_DEFUN([AST_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]) ])]) # AST_PROG_EGREP