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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: emacs26, ucs-normalize.el, =?utf-8?Q?Symbol=E2=80=99s?=
	function definition is void: regexp-opt-charset
Date: Mon, 11 Feb 2019 18:39:08 +0200
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To: hx <silent2600@gmail.com>
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> From: hx <silent2600@gmail.com>
> Date: Mon, 11 Feb 2019 09:21:20 +0800
> 
> can't compile emacs26 today after git pull,
> CentOS7 X64:
> 
> make[2]: Entering directory `/emacs-26-src/lisp'
>   ELC      ../lisp/international/ucs-normalize.elc
> 
> In toplevel form:
> international/ucs-normalize.el:266:56:Error: Symbol’s function definition is void: regexp-opt-charset
> make[2]: *** [../lisp/international/ucs-normalize.elc] Error 1

I think I understand why, but just so I'm sure: can you tell how you
configured this build?  What was the command line with which you
invoked the 'configure' script?