From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Andy Moreton Newsgroups: gmane.emacs.devel Subject: Re: What's the right way to detect libxml2? Date: Tue, 24 Oct 2017 18:46:07 +0100 Message-ID: References: <7f80cde1944261b7ee29020ff953f14c.squirrel@cloud103.planethippo.com> <36e54d52-99b2-ae53-2b36-99d06eb53d15@gmail.com> <877evkfpe1.fsf@gmail.com> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: blaine.gmane.org 1508867206 29188 195.159.176.226 (24 Oct 2017 17:46:46 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 24 Oct 2017 17:46:46 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (windows-nt) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Tue Oct 24 19:46:41 2017 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1e73Hg-0006cj-Ai for ged-emacs-devel@m.gmane.org; Tue, 24 Oct 2017 19:46:36 +0200 Original-Received: from localhost ([::1]:44976 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1e73Hn-0003qf-K5 for ged-emacs-devel@m.gmane.org; Tue, 24 Oct 2017 13:46:43 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:41362) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1e73Hc-0003q9-V6 for emacs-devel@gnu.org; Tue, 24 Oct 2017 13:46:33 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1e73HZ-0007Yl-N1 for emacs-devel@gnu.org; Tue, 24 Oct 2017 13:46:33 -0400 Original-Received: from [195.159.176.226] (port=37443 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1e73HZ-0007Xp-G5 for emacs-devel@gnu.org; Tue, 24 Oct 2017 13:46:29 -0400 Original-Received: from list by blaine.gmane.org with local (Exim 4.84_2) (envelope-from ) id 1e73HO-0004gK-55 for emacs-devel@gnu.org; Tue, 24 Oct 2017 19:46:18 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 36 Original-X-Complaints-To: usenet@blaine.gmane.org Cancel-Lock: sha1:ytRowetQlPTglY08Q8Eu/a167LE= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 195.159.176.226 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:219725 Archived-At: On Tue 24 Oct 2017, Robert Pluim wrote: > Andy Moreton writes: > >> On Tue 24 Oct 2017, Clément Pit-Claudel wrote: >> >>> On 2017-10-24 09:38, Andy Moreton wrote: >>>> For libxml2, try using (shr-render-buffer) on an HTML/XML buffer to get >>>> the library loaded. >>> >>> Is that better than just calling libxml-parse-xml-region and checking for a >>> nil return value? It sounds like shr-render-buffer would do a lot more — do we >>> need that? >> >> No, it was just an example of doing something to force the library to be >> loaded. Your version is simpler, and having (libxml-available-p) would >> be even better. >> >> AndyM > > Like thus? Very lightly tested on GNU/Linux only. Might need a NEWS > entry. > Works for me on a 64bit MinGW64/MSYS2 build of emacs-26 on Windows 10. I don't think you need to remove the HAVE_LIBXML2 conditionals, as lisp code can check (fboundp 'libxml-available-p) before calling it, and it may break builds without libxml2 support. Also, the libxml-available-p doc string claims it returns a list of capabilities (which is true for gnutls-available-p), but it only returns nil or t. Thanks for working on this, AndyM