From e81f078bfd867413b3500ba5d815837995f6d56a Mon Sep 17 00:00:00 2001
From: Marcel Holtmann <marcel@holtmann.org>
Date: Tue, 10 Feb 2026 16:40:41 +0100
Subject: [PATCH] eap-mschapv2: Fix build issue with missing _GNU_SOURCE
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  CC       src/eap-mschapv2.o
src/eap-mschapv2.c: In function ‘eap_mschapv2_state_free’:
src/eap-mschapv2.c:202:9: error: implicit declaration of function ‘explicit_bzero’ [-Wimplicit-function-declaration]
  202 |         explicit_bzero(state->password_hash, sizeof(state->password_hash));
      |         ^~~~~~~~~~~~~~
---
 src/eap-mschapv2.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/eap-mschapv2.c b/src/eap-mschapv2.c
index 00976d73..cfe4593b 100644
--- a/src/eap-mschapv2.c
+++ b/src/eap-mschapv2.c
@@ -24,9 +24,11 @@
 #include <config.h>
 #endif
 
+#define _GNU_SOURCE
 #include <ctype.h>
 #include <stdio.h>
 #include <errno.h>
+#include <string.h>
 #include <ell/ell.h>
 
 #include "src/missing.h"