From: Jochen Sprickerhof <jspricke@debian.org>
Date: Mon, 29 Mar 2021 19:48:13 +0200
Subject: Fix definition of GLsizeiptr

---
 j3d-core/src/native/ogl/glext.h | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/j3d-core/src/native/ogl/glext.h b/j3d-core/src/native/ogl/glext.h
index 2519a6c..71ff798 100644
--- a/j3d-core/src/native/ogl/glext.h
+++ b/j3d-core/src/native/ogl/glext.h
@@ -43,6 +43,8 @@ extern "C" {
 #define GLAPI extern
 #endif
 
+#include <KHR/khrplatform.h>
+
 /*************************************************************/
 
 /* Header file version number, required by OpenGL ABI for Linux */
@@ -3390,14 +3392,14 @@ typedef char GLchar;			/* native character */
 
 #ifndef GL_VERSION_1_5
 /* GL types for handling large vertex buffer objects */
-typedef ptrdiff_t GLintptr;
-typedef ptrdiff_t GLsizeiptr;
+typedef khronos_intptr_t GLintptr;
+typedef khronos_ssize_t GLsizeiptr;
 #endif
 
 #ifndef GL_ARB_vertex_buffer_object
 /* GL types for handling large vertex buffer objects */
-typedef ptrdiff_t GLintptrARB;
-typedef ptrdiff_t GLsizeiptrARB;
+typedef khronos_intptr_t GLintptrARB;
+typedef khronos_ssize_t GLsizeiptrARB;
 #endif
 
 #ifndef GL_ARB_shader_objects