From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: [PATCH] Add Blender
Date: Sat, 26 Sep 2015 14:47:37 +0200
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	<20150921184539.2cddac04@openmailbox.org> <87k2rhpraz.fsf@elephly.net>
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In-Reply-To: <87k2rhpraz.fsf@elephly.net> (Ricardo Wurmus's message of "Wed,
	23 Sep 2015 08:45:24 +0200")
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To: Ricardo Wurmus <rekado@elephly.net>
Cc: guix-devel <guix-devel@gnu.org>

Ricardo Wurmus <rekado@elephly.net> skribis:

> Eric Bavier <ericbavier@openmailbox.org> writes:

[...]

>>> * gnu/packages/graphics.scm (blender): New variable.
>
> [...]
>
>>> +         (add-after 'set-paths 'add-ilmbase-include-path
>>> +          (lambda* (#:key inputs #:allow-other-keys)
>>> +            ;; OpenEXR propagates ilmbase, but its include files do no=
t appear
>>> +            ;; in the CPATH, so we need to add "$ilmbase/include/OpenE=
XR/" to
>>> +            ;; the CPATH to satisfy the dependency on "half.h".
>>> +            (setenv "CPATH"
>>> +                    (string-append (assoc-ref inputs "ilmbase")
>>> +                                   "/include/OpenEXR"
>>> +                                   ":" (getenv "CPATH")))
>>
>> Is the "half.h" header in OpenEXR, or in blender?  If the latter, would
>> it make more sense to instead patch the include directive to include
>> the OpenEXR path?
>
> =E2=80=9Chalf.h=E2=80=9D is provided by =E2=80=9Cilmbase=E2=80=9D.  The i=
nclude is in Blender, in this
> file:
>
>     blender-2.75a/source/blender/imbuf/intern/openexr/openexr_api.cpp
>
> I could patch this instead, replacing
>
>     #include <half.h>
>
> with
>
>     #include <OpenEXR/half.h>

Normally =E2=80=98OpenEXR.pc=E2=80=99 provides the right -I flags:

  https://lists.gnu.org/archive/html/guix-devel/2015-09/msg00160.html

Could it be that the .pc is ignored or something?

Ludo=E2=80=99.