GNU bug report logs - #13470
24.3.50; configure: Warn if runtime library is present, but headers are absent

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Jambunathan K <kjambunathan <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.3.50;
	configure: Warn if runtime library is present, but headers are absent
Date: Thu, 17 Jan 2013 10:46:11 +0530

[Message part 1 (text/plain, inline)]

See thread titled "Help with Tamil (Indic) font (Emacs from bzr)" on
emacs-devel.

Relevant posts from the above thread:

1. http://lists.gnu.org/archive/html/emacs-devel/2013-01/msg00375.html
2. http://lists.gnu.org/archive/html/emacs-devel/2013-01/msg00379.html

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[Message part 2 (text/plain, inline)]

From: "Stephen J. Turnbull" <stephen <at> xemacs.org>
Subject: Re: Help with Tamil (Indic) font (Emacs from bzr)
To: Jambunathan K <kjambunathan <at> gmail.com>
Cc: emacs-devel <at> gnu.org
Date: Thu, 17 Jan 2013 10:39:20 +0900 (3 hours, 32 minutes, 27 seconds ago)

Jambunathan K writes:

 > I am wondering whether `* Complex Text Layout support libraries'
 > section of INSTALL file should mention availability of both xft and
 > freetype headers.

No, IMO this is a generic bug in configure.  It should check for
libraries first, then headers.  If the library needed to provide a
requested feature is present, but not the headers, it should bitch.

NB In INSTALL, somewhere near the top, you'll probably find a warning
about the perverse behavior (from the free software point of view) of
free software distributions which provide libraries for running
software but not the headers needed to build software.

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In GNU Emacs 24.3.50.1 (i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2013-01-17 on debian-6.05
Bzr revision: 111538 eggert <at> cs.ucla.edu-20130116174539-ba1nafedm5ca4z4n
Windowing system distributor `The X.Org Foundation', version 11.0.10707000
System Description:	Debian GNU/Linux 6.0.5 (squeeze)

Message #8 received at 13470 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Jambunathan K <kjambunathan <at> gmail.com>
Cc: 13470 <at> debbugs.gnu.org
Subject: Re: bug#13470: 24.3.50;
	configure: Warn if runtime library is present, but headers are absent
Date: Thu, 17 Jan 2013 00:45:53 -0500

Jambunathan K wrote:

> No, IMO this is a generic bug in configure.  It should check for
> libraries first, then headers.  If the library needed to provide a
> requested feature is present, but not the headers, it should bitch.

Well IMO Emacs configure script is fine in this regard.
This is too vague to do anything useful with.

Message #13 received at 13470 <at> debbugs.gnu.org (full text, mbox):

From: Jambunathan K <kjambunathan <at> gmail.com>
To: Glenn Morris <rgm <at> gnu.org>
Cc: 13470 <at> debbugs.gnu.org
Subject: Re: bug#13470: 24.3.50;
	configure: Warn if runtime library is present, but headers are absent
Date: Thu, 17 Jan 2013 12:39:35 +0530

Glenn Morris <rgm <at> gnu.org> writes:

> Jambunathan K wrote:
>
>> No, IMO this is a generic bug in configure.  It should check for
>> libraries first, then headers.  If the library needed to provide a
>> requested feature is present, but not the headers, it should bitch.
>
> Well IMO Emacs configure script is fine in this regard.
> This is too vague to do anything useful with.

Bug has become a bit meta.  Nevertheless,

It suffices for my purpose if INSTALL file mentions dependence on xft
and freetype libraries/headers for CTL support.  Currently, the file
talks about only m17n and otf libraries.

If Debian (and possibly other package maintainers are reading this
report), they can consider including the above libraries as part of
Emacs build dependencies.  This way

      apt-get build-dep emacs

will DTRT as regards to CTL support.

Message #18 received at 13470-done <at> debbugs.gnu.org (full text, mbox):

From: Jambunathan K <kjambunathan <at> gmail.com>
To: 13470-done <at> debbugs.gnu.org
Subject: Re: bug#13470: 24.3.50;
 configure: Warn if runtime library is present, but headers are absent
Date: Fri, 15 Nov 2013 10:15:18 +0530

OP here. Closed.

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