X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=simgear%2Fscreen%2Fextensions.hxx;h=d7999bc62cc0d1d0627dd47e8811b467e2405071;hb=d8d1064e05af5fa8ffcc35cb7874088a60b99c80;hp=aa5dd3c7626c6472c34a6e4222bf559d69a4cfc4;hpb=6b68d9d90b6141bc0374cfd39d8a0127d7c90013;p=simgear.git

diff --git a/simgear/screen/extensions.hxx b/simgear/screen/extensions.hxx
index aa5dd3c7..d7999bc6 100644
--- a/simgear/screen/extensions.hxx
+++ b/simgear/screen/extensions.hxx
@@ -24,22 +24,17 @@
 #ifndef __SG_EXTENSIONS_HXX
 #define __SG_EXTENSIONS_HXX 1
 
-#if defined(__CYGWIN__) && !defined(WIN32) /* && !defined(USING_X) */
-#define WIN32
-#endif
-
-#if defined(WIN32)  /* MINGW and MSC predefine WIN32 */
+#ifdef WIN32
 # include <windows.h>
 #endif
 
-#if !defined(WIN32)
-# include <dlfcn.h>
-#endif
-
 #include <simgear/compiler.h>
 
-#include SG_GL_H
+#include <osg/GL>
 
+#if !defined(__APPLE__) && !defined(WIN32)
+#  include <GL/glx.h>
+#endif
 
 #if defined(__cplusplus)
 extern "C" {
@@ -50,7 +45,7 @@ extern "C" {
 #endif
 
 bool SGSearchExtensionsString(const char *extString, const char *extName);
-bool SGIsOpenGLExtensionSupported(char *extName);
+bool SGIsOpenGLExtensionSupported(const char *extName);
 
 #ifdef __APPLE__
   // don't use an inline function for symbol lookup, since it is too big
@@ -70,8 +65,7 @@ inline void (*SGLookupFunction(const char *func))()
 #elif defined( __APPLE__ )
     return (void (*)()) macosxGetGLProcAddress(func);
 
-#else // UNIX
-
+#else // UNIX, default
     return (void (*)()) SGGetGLProcAddress(func);
 #endif
 }