From 35ab16d38f66aa2083a74e1d8dedea7cb21953a4 Mon Sep 17 00:00:00 2001
From: Sam Edwards <CFSworks@gmail.com>
Date: Thu, 24 May 2018 14:57:09 -0600
Subject: [PATCH] makepanda: Update checkPandaVersion.h

This makes it possible to include it multiple times in a single
translation unit, and/or multiple times in a single dynamic
library (and without excess code bloat, too).
---
 makepanda/makepanda.py | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/makepanda/makepanda.py b/makepanda/makepanda.py
index 9f0f1d928e..ef37ac1964 100755
--- a/makepanda/makepanda.py
+++ b/makepanda/makepanda.py
@@ -2606,18 +2606,21 @@ PANDAVERSION_H_RUNTIME="""
 
 CHECKPANDAVERSION_CXX="""
 # include "dtoolbase.h"
-EXPCL_DTOOL_DTOOLUTIL int panda_version_$VERSION1_$VERSION2 = 0;
+EXPCL_DTOOL_DTOOLBASE int panda_version_$VERSION1_$VERSION2 = 0;
 """
 
 CHECKPANDAVERSION_H="""
+# ifndef CHECKPANDAVERSION_H
+# define CHECKPANDAVERSION_H
 # include "dtoolbase.h"
-extern EXPCL_DTOOL_DTOOLUTIL int panda_version_$VERSION1_$VERSION2;
-# ifndef WIN32
-/* For Windows, exporting the symbol from the DLL is sufficient; the
-      DLL will not load unless all expected public symbols are defined.
-      Other systems may not mind if the symbol is absent unless we
-      explictly write code that references it. */
-static int check_panda_version = panda_version_$VERSION1_$VERSION2;
+extern EXPCL_DTOOL_DTOOLBASE int panda_version_$VERSION1_$VERSION2;
+// Hack to forcibly depend on the check
+template<typename T>
+class CheckPandaVersion {
+public:
+  int check() { return panda_version_$VERSION1_$VERSION2; }
+};
+template class CheckPandaVersion<void>;
 # endif
 """