Index: build/premake/premake5.lua
===================================================================
--- build/premake/premake5.lua
+++ build/premake/premake5.lua
@@ -745,6 +745,7 @@
 
 
 	source_dirs = {
+		"third_party/ogre3d_preprocessor",
 		"tools/atlas/GameInterface",
 		"tools/atlas/GameInterface/Handlers"
 	}
Index: source/graphics/MaterialManager.cpp
===================================================================
--- source/graphics/MaterialManager.cpp
+++ source/graphics/MaterialManager.cpp
@@ -19,13 +19,13 @@
 
 #include "MaterialManager.h"
 
+#include "graphics/PreprocessorWrapper.h"
 #include "lib/ogl.h"
 #include "maths/MathUtil.h"
 #include "maths/Vector4D.h"
 #include "ps/CLogger.h"
 #include "ps/ConfigDB.h"
 #include "ps/Filesystem.h"
-#include "ps/PreprocessorWrapper.h"
 #include "ps/XML/Xeromyces.h"
 #include "renderer/RenderingOptions.h"
 
Index: source/graphics/PreprocessorWrapper.h
===================================================================
--- source/graphics/PreprocessorWrapper.h
+++ source/graphics/PreprocessorWrapper.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2012 Wildfire Games.
+/* Copyright (C) 2019 Wildfire Games.
  * This file is part of 0 A.D.
  *
  * 0 A.D. is free software: you can redistribute it and/or modify
@@ -15,10 +15,10 @@
  * along with 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef INCLUDED_PREPROCESSORWRAPPER
-#define INCLUDED_PREPROCESSORWRAPPER
+#ifndef INCLUDED_OGREGLSLPREPROCESSORWRAPPER
+#define INCLUDED_OGREGLSLPREPROCESSORWRAPPER
 
-#include "ps/Preprocessor.h"
+#include "third_party/ogre3d_preprocessor/OgreGLSLPreprocessor.h"
 #include "ps/CStr.h"
 
 class CShaderDefines;
@@ -29,6 +29,8 @@
 class CPreprocessorWrapper
 {
 public:
+	CPreprocessorWrapper();
+
 	void AddDefine(const char* name, const char* value);
 
 	void AddDefines(const CShaderDefines& defines);
@@ -37,8 +39,10 @@
 
 	CStr Preprocess(const CStr& input);
 
+	static void PyrogenesisShaderError(void* UNUSED(iData), int iLine, const char* iError, const char* iToken, size_t iTokenLen);
+
 private:
 	CPreprocessor m_Preprocessor;
 };
 
-#endif // INCLUDED_PREPROCESSORWRAPPER
+#endif // INCLUDED_OGREGLSLPREPROCESSORWRAPPER
Index: source/graphics/PreprocessorWrapper.cpp
===================================================================
--- source/graphics/PreprocessorWrapper.cpp
+++ source/graphics/PreprocessorWrapper.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2012 Wildfire Games.
+/* Copyright (C) 2019 Wildfire Games.
  * This file is part of 0 A.D.
  *
  * 0 A.D. is free software: you can redistribute it and/or modify
@@ -22,6 +22,19 @@
 #include "graphics/ShaderDefines.h"
 #include "ps/CLogger.h"
 
+void CPreprocessorWrapper::PyrogenesisShaderError(void* UNUSED(iData), int iLine, const char* iError, const char* iToken, size_t iTokenLen)
+{
+    if (iToken)
+        LOGERROR("Preprocessor error: line %d: %s: '%s'\n", iLine, iError, std::string(iToken, iTokenLen).c_str());
+    else
+        LOGERROR("Preprocessor error: line %d: %s\n", iLine, iError);
+}
+
+CPreprocessorWrapper::CPreprocessorWrapper()
+{
+	CPreprocessor::ErrorHandler = CPreprocessorWrapper::PyrogenesisShaderError;
+}
+
 void CPreprocessorWrapper::AddDefine(const char* name, const char* value)
 {
 	m_Preprocessor.Define(name, value);
Index: source/graphics/ShaderManager.cpp
===================================================================
--- source/graphics/ShaderManager.cpp
+++ source/graphics/ShaderManager.cpp
@@ -19,6 +19,7 @@
 
 #include "ShaderManager.h"
 
+#include "graphics/PreprocessorWrapper.h"
 #include "graphics/ShaderTechnique.h"
 #include "lib/config2.h"
 #include "lib/timer.h"
@@ -26,7 +27,6 @@
 #include "ps/CLogger.h"
 #include "ps/CStrIntern.h"
 #include "ps/Filesystem.h"
-#include "ps/PreprocessorWrapper.h"
 #include "ps/Profile.h"
 #if USE_SHADER_XML_VALIDATION
 # include "ps/XML/RelaxNG.h"
Index: source/graphics/ShaderProgram.cpp
===================================================================
--- source/graphics/ShaderProgram.cpp
+++ source/graphics/ShaderProgram.cpp
@@ -20,6 +20,7 @@
 #include "ShaderProgram.h"
 
 #include "graphics/Color.h"
+#include "graphics/PreprocessorWrapper.h"
 #include "graphics/ShaderManager.h"
 #include "graphics/TextureManager.h"
 #include "lib/res/graphics/ogl_tex.h"
@@ -27,7 +28,6 @@
 #include "maths/Vector3D.h"
 #include "ps/CLogger.h"
 #include "ps/Filesystem.h"
-#include "ps/PreprocessorWrapper.h"
 
 #if !CONFIG2_GLES
 
Index: source/third_party/ogre3d_preprocessor/OgreGLSLPreprocessor.cpp
===================================================================
--- source/third_party/ogre3d_preprocessor/OgreGLSLPreprocessor.cpp
+++ source/third_party/ogre3d_preprocessor/OgreGLSLPreprocessor.cpp
@@ -34,9 +34,7 @@
 
 #include "precompiled.h"
 
-#include "Preprocessor.h"
-
-#include "ps/CLogger.h"
+#include "OgreGLSLPreprocessor.h"
 
 // Limit max number of macro arguments to this
 #define MAX_MACRO_ARGS 16
@@ -230,11 +228,12 @@
                           const char *iToken, size_t iTokenLen)
 {
     (void)iData;
+    char line [1000];
     if (iToken)
-        LOGERROR("Preprocessor error: line %d: %s: '%s'\n",
-                  iLine, iError, std::string (iToken, iTokenLen));
+        snprintf (line, sizeof (line), "line %d: %s: `%.*s'\n",
+                    iLine, iError, int (iTokenLen), iToken);
     else
-        LOGERROR("Preprocessor error: line %d: %s\n", iLine, iError);
+        snprintf (line, sizeof (line), "line %d: %s\n", iLine, iError);
 }
 
 //---------------------------------------------------------------------------//
Index: source/third_party/ogre3d_preprocessor/tests/test_Preprocessor.h
===================================================================
--- source/third_party/ogre3d_preprocessor/tests/test_Preprocessor.h
+++ source/third_party/ogre3d_preprocessor/tests/test_Preprocessor.h
@@ -17,11 +17,17 @@
 
 #include "lib/self_test.h"
 
-#include "ps/Preprocessor.h"
+#include "graphics/PreprocessorWrapper.h"
+#include "third_party/ogre3d_preprocessor/OgreGLSLPreprocessor.h"
 
 class TestPreprocessor : public CxxTest::TestSuite
 {
 public:
+	void setUp()
+	{
+		CPreprocessor::ErrorHandler = CPreprocessorWrapper::PyrogenesisShaderError;
+	}
+
 	void test_basic()
 	{
 		CPreprocessor preproc;