Use GL_VERSION_x_y to guard the enums for promoted extensions

The core names for enums are used in headers, and older systems might
have the extension present but too old core version.

diff --git a/scripts/extgen.py b/scripts/extgen.py
index 7ab8abc3fc83ad8efebe031dc859866d98d6dda0..7a1b18629cafa4b2e5a116b316a2b9beb8e63346 100755 (executable)
--- a/scripts/extgen.py
+++ b/scripts/extgen.py
@@ -263,7 +263,10 @@ if funcs or enums:
                out.write("#endif\n\n")
 
        if enums:
-               out.write("#ifndef GL_%s\n"%ext)
+               if ver:
+                       out.write("#ifndef GL_VERSION_%s\n"%"_".join(map(str, ver)))
+               else:
+                       out.write("#ifndef GL_%s\n"%ext)
                for e in enums:
                        out.write("#define %s 0x%04X\n"%(e.name, e.value))
                out.write("#endif\n\n")