Go-OpenGL GetErrorString

diff --git a/gl10/gl.go b/gl10/gl.go
index 6f33f6a..42c6cf6 100644
--- a/gl10/gl.go
+++ b/gl10/gl.go
@@ -1,8 +1,10 @@
 package gl
 
 // #ifdef __Darwin
+// # include <OpenGL/glew.h>
 // # include <OpenGL/gl.h>
 // #else
+// # include <GL/glew.h>
 // # include <GL/gl.h>
 // #endif
 //
@@ -541,6 +543,11 @@ func GetError() GLenum {
 	return GLenum(C.glGetError())
 }
 
+func GetErrorString(error GLenum) string {
+  raw := (*C.char)(unsafe.Pointer(C.glewGetErrorString(C.GLenum(error))))
+  return C.GoString(raw)
+}
+
 //void glGetFloatv (GLenum pname, GLfloat *params)
 func GetFloatv(pname GLenum, params *GLfloat) {
 	C.glGetFloatv(C.GLenum(pname), (*C.GLfloat)(params))
@@ -1716,8 +1723,8 @@ type GLintptrARB C.GLintptrARB
 type GLsizeiptrARB C.GLsizeiptrARB
 type GLcharARB C.GLcharARB
 type GLhandleARB C.GLhandleARB
-type GLhalfARB C.GLhalfARB
-type GLhalfNV C.GLhalfNV
+// type GLhalfARB C.GLhalfARB
+// type GLhalfNV C.GLhalfNV
 type GLint64EXT C.GLint64EXT
 type GLuint64EXT C.GLuint64EXT