fix compilation for old but not so old versions of glew

Eigen/src/Core/util/Macros.h

@@ -26,8 +26,8 @@
 #ifndef EIGEN_MACROS_H
 #define EIGEN_MACROS_H
 
-#define EIGEN_WORLD_VERSION 2
-#define EIGEN_MAJOR_VERSION 95
+#define EIGEN_WORLD_VERSION 3
+#define EIGEN_MAJOR_VERSION 0
 #define EIGEN_MINOR_VERSION 0
 
 #define EIGEN_VERSION_AT_LEAST(x,y,z) (EIGEN_WORLD_VERSION>x || (EIGEN_WORLD_VERSION>=x && \

unsupported/test/openglsupport.cpp

@@ -320,6 +320,7 @@ void test_openglsupport()
     else
       std::cerr << "Warning: opengl 3.0 was not tested\n";
     
+    #ifdef GLEW_ARB_gpu_shader_fp64
     if(GLEW_ARB_gpu_shader_fp64)
     {
       #ifdef GL_ARB_gpu_shader_fp64
@@ -343,6 +344,9 @@ void test_openglsupport()
     }
     else
       std::cerr << "Warning: GLEW_ARB_gpu_shader_fp64 was not tested\n";
+    #else
+      std::cerr << "Warning: GLEW_ARB_gpu_shader_fp64 was not tested\n";
+    #endif
   }
   
 }