bug#36977: Add OpenSubdiv library, and add as Blender dependency

[Carlo Zancanaro <carlo@zancanaro.id.au>]

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On Sun, Aug 11 2019, Carlo Zancanaro wrote:
> ... adding it to the Blender inputs didn't cause the subdivision 
> modifier to work. ...

Well, it turns out I just had to add the -DWITH_OPENSUBDIV=ON 
configure flag. Here's a new patch to do that!


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From 231763df5b336118dae973da9dbde362dd1c1465 Mon Sep 17 00:00:00 2001
From: Carlo Zancanaro <carlo@zancanaro.id.au>
Date: Mon, 12 Aug 2019 20:15:11 +1000
Subject: [PATCH] gnu: blender: Add opensubdiv as an input

* gnu/packages/graphics.scm (blender)[inputs]: Add opensubdiv.
[arguments]: Add "-DWITH_OPENSUBDIV=ON" to #:configure-flags.
---
 gnu/packages/graphics.scm | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gnu/packages/graphics.scm b/gnu/packages/graphics.scm
index 11ea550039..b9207f284d 100644
--- a/gnu/packages/graphics.scm
+++ b/gnu/packages/graphics.scm
@@ -147,6 +147,7 @@ architectures.")
                "-DWITH_INSTALL_PORTABLE=OFF"
                "-DWITH_JACK=ON"
                "-DWITH_MOD_OCEANSIM=ON"
+               "-DWITH_OPENSUBDIV=ON"
                "-DWITH_PYTHON_INSTALL=OFF"
                (string-append "-DPYTHON_LIBRARY=python" ,python-version "m")
                (string-append "-DPYTHON_LIBPATH=" (assoc-ref %build-inputs "python")
@@ -182,6 +183,7 @@ architectures.")
        ("libx11" ,libx11)
        ("openimageio" ,openimageio)
        ("openexr" ,openexr)
+       ("opensubdiv" ,opensubdiv)
        ("ilmbase" ,ilmbase)
        ("openjpeg" ,openjpeg)
        ("libjpeg" ,libjpeg)
-- 
2.22.0