graphics/k3d: Patch for gcc >= 7.x.

Move graphviz between the mandatory dependencies
or docs aren't built correctly (and compilation breaks)

Signed-off-by: Matteo Bernardini <ponce@slackbuilds.org>

graphics/k3d/README

@@ -7,7 +7,6 @@ patches, curves and animation.
 
 Optional dependencies:
 
-graphviz
 gtksourceview
 libgnome
 OpenCASCADE

graphics/k3d/gcc7.patch

@@ -0,0 +1,23 @@
+From d9786540a205bec0b381f339497d7c2cce00376b Mon Sep 17 00:00:00 2001
+From: Jonathan Wakely <jwakely@redhat.com>
+Date: Wed, 1 Feb 2017 02:07:28 +0000
+Subject: [PATCH] Add required header for ostream operations
+
+This file uses std::ostream::operator<<(double) without including
+<ostream> and so fails to compile using GCC 7.
+---
+ k3dsdk/measurement.h | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/k3dsdk/measurement.h b/k3dsdk/measurement.h
+index 9edf7aef..67df5aa0 100644
+--- a/k3dsdk/measurement.h
++++ b/k3dsdk/measurement.h
+@@ -27,6 +27,7 @@
+ 
+ #include <cassert>
+ #include <iosfwd>
++#include <ostream>
+ #include <map>
+ #include <string>
+ #include <typeinfo>

graphics/k3d/k3d.SlackBuild

@@ -73,6 +73,9 @@ find -L . \
  \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
   -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
 
+# From upstream
+patch -p1 < $CWD/gcc7.patch
+
 # Fix man install directory.
 sed -i "s|share/man|man|" share/man/CMakeLists.txt
 

graphics/k3d/k3d.info

@@ -5,6 +5,6 @@ DOWNLOAD="https://github.com/K-3D/k3d/archive/k3d-0.8.0.6/k3d-k3d-0.8.0.6.tar.gz
 MD5SUM="129e051a1e724c14139808c25cd170f0"
 DOWNLOAD_x86_64=""
 MD5SUM_x86_64=""
-REQUIRES="gtkglext ftgl"
+REQUIRES="graphviz gtkglext ftgl"
 MAINTAINER="David Spencer"
 EMAIL="baildon.research@googlemail.com"