From 295b909c1ce55cb9e4c9e8b95c5c663e74ddd204 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20Vondru=C5=A1?= <mosra@centrum.cz>
Date: Sun, 17 May 2015 02:14:41 +0200
Subject: [PATCH] Print error if transform feedback header is used in OpenGL ES
 2.0 build.

---
 src/Magnum/Context.cpp                             | 2 ++
 src/Magnum/Implementation/TransformFeedbackState.h | 4 ++++
 src/Magnum/TransformFeedback.h                     | 2 ++
 3 files changed, 8 insertions(+)

diff --git a/src/Magnum/Context.cpp b/src/Magnum/Context.cpp
index af6b230e2..d773c2670 100644
--- a/src/Magnum/Context.cpp
+++ b/src/Magnum/Context.cpp
@@ -50,7 +50,9 @@
 #include "Implementation/MeshState.h"
 #include "Implementation/ShaderProgramState.h"
 #include "Implementation/TextureState.h"
+#ifndef MAGNUM_TARGET_GLES2
 #include "Implementation/TransformFeedbackState.h"
+#endif
 
 namespace Magnum {
 
diff --git a/src/Magnum/Implementation/TransformFeedbackState.h b/src/Magnum/Implementation/TransformFeedbackState.h
index 1ecfdfa06..9f406775c 100644
--- a/src/Magnum/Implementation/TransformFeedbackState.h
+++ b/src/Magnum/Implementation/TransformFeedbackState.h
@@ -27,6 +27,10 @@
 
 #include "Magnum/Context.h"
 
+#ifdef MAGNUM_TARGET_GLES2
+#error This header is not available in OpenGL ES 2.0 build.
+#endif
+
 namespace Magnum { namespace Implementation {
 
 struct TransformFeedbackState {
diff --git a/src/Magnum/TransformFeedback.h b/src/Magnum/TransformFeedback.h
index cb41b6d8a..6e4c02ac7 100644
--- a/src/Magnum/TransformFeedback.h
+++ b/src/Magnum/TransformFeedback.h
@@ -382,6 +382,8 @@ inline TransformFeedback& TransformFeedback::operator=(TransformFeedback&& other
 }
 
 }
+#else
+#error This header is not available in OpenGL ES 2.0 build.
 #endif
 
 #endif