From 81a72ff06b5ba1819169b35a1eaf9063ec1e8117 Mon Sep 17 00:00:00 2001
From: Aaron Franke <arnfranke@yahoo.com>
Date: Sun, 17 Dec 2023 11:45:31 -0600
Subject: [PATCH] Allow detecting when building as a GDExtension

(cherry picked from commit e17c7bf53060c7f1d34246af68b1d103dd8c01f7)
---
 tools/godotcpp.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/godotcpp.py b/tools/godotcpp.py
index e445cad3..0b02eea2 100644
--- a/tools/godotcpp.py
+++ b/tools/godotcpp.py
@@ -295,6 +295,9 @@ def generate(env):
     if env["precision"] == "double":
         env.Append(CPPDEFINES=["REAL_T_IS_DOUBLE"])
 
+    # Allow detecting when building as a GDExtension.
+    env.Append(CPPDEFINES=["GDEXTENSION"])
+
     # Suffix
     suffix = ".{}.{}".format(env["platform"], env["target"])
     if env.dev_build: