From a4821fac21abc1273b442628c8315b75d6d06da1 Mon Sep 17 00:00:00 2001
From: Marius Vikhammer <marius.vikhammer@espressif.com>
Date: Mon, 25 Oct 2021 13:48:33 +0800
Subject: [PATCH] docs: define __DOXYGEN__ for doxygen builds

Some docs depended on __DOXYGEN__ but this was never defined anywhere.
---
 docs/doxygen/Doxyfile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/docs/doxygen/Doxyfile b/docs/doxygen/Doxyfile
index 4a62be15f6..a76548f5f9 100644
--- a/docs/doxygen/Doxyfile
+++ b/docs/doxygen/Doxyfile
@@ -241,6 +241,7 @@ MACRO_EXPANSION        = YES
 EXPAND_ONLY_PREDEF     = YES
 PREDEFINED             = \
     $(ENV_DOXYGEN_DEFINES) \
+    __DOXYGEN__=1 \
     __attribute__(x)= \
 	_Static_assert()= \
     IDF_DEPRECATED(X)= \