kde4: fix cantor build

pkgs/desktops/kde-4.14/kdeedu/cantor.nix

@@ -7,6 +7,8 @@ kde {
 
   nativeBuildInputs = [ pkgconfig ];
 
+  patches = [ ./commit-846cf02 ];
+
   meta = {
     description = "KDE Frontend to Mathematical Software";
   };

pkgs/desktops/kde-4.14/kdeedu/commit-846cf02

@@ -0,0 +1,42 @@
+diff --git a/src/backends/R/rserver/rcallbacks.h b/src/backends/R/rserver/rcallbacks.h
+index 8f4752c..6d0e9a2 100644
+--- a/src/backends/R/rserver/rcallbacks.h
++++ b/src/backends/R/rserver/rcallbacks.h
+@@ -30,7 +30,6 @@ class Expression;
+ #include <Rversion.h>
+ #include <Rdefines.h>
+ #define R_INTERFACE_PTRS
+-#include <Rinterface.h>
+ #include <R_ext/Parse.h>
+ 
+ //This File implements the necessary callbacks for R
+commit 846cf02ab1618b9322b83eafc18dff3264988b72
+Author: Raymond Wooninck <tittiatcoke@gmail.com>
+Date:   Mon Apr 27 16:08:51 2015 +0200
+
+    Also build against R >= 3.2.
+
+diff --git a/src/backends/R/rserver/rcallbacks.cpp b/src/backends/R/rserver/rcallbacks.cpp
+index 2c86531..492f270 100644
+--- a/src/backends/R/rserver/rcallbacks.cpp
++++ b/src/backends/R/rserver/rcallbacks.cpp
+@@ -26,6 +26,7 @@
+ #include <QStringList>
+ 
+ #include <stdio.h>
++#include <Rinterface.h>
+ 
+ RServer* server;
+ Expression* currentExpression;
+diff --git a/src/backends/R/rserver/rserver.cpp b/src/backends/R/rserver/rserver.cpp
+index 30cdb70..f689f42 100644
+--- a/src/backends/R/rserver/rserver.cpp
++++ b/src/backends/R/rserver/rserver.cpp
+@@ -42,7 +42,6 @@
+ #include <Rversion.h>
+ #include <Rdefines.h>
+ #define R_INTERFACE_PTRS
+-#include <Rinterface.h>
+ #include <R_ext/Parse.h>
+ 
+ // Not making a member to prevent pulling R headers into rserver.h