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# 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
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