From 34e7a57673c9730ee5d1f7ebb07e152567bd8e0b Mon Sep 17 00:00:00 2001
From: Jessica Clarke <jrtc27@FreeBSD.org>
Date: Wed, 22 Oct 2025 21:06:02 +0100
Subject: [PATCH] krb5: Include <features.h> on Linux so __GLIBC__ can be
 checked

__GLIBC__ is not pre-defined by the toolchain, it comes from features.h,
so we need to make sure that's included by this point.

Fixes:	4dd2b869cd07 ("krb5: Fix -Wint-conversion when bootstrapping on GNU/Linux")
---
 krb5/include/autoconf.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/krb5/include/autoconf.h b/krb5/include/autoconf.h
index f1cf42d8f90..760aca79176 100644
--- a/krb5/include/autoconf.h
+++ b/krb5/include/autoconf.h
@@ -691,6 +691,9 @@
 #define STDC_HEADERS 1
 
 /* Define to 1 if strerror_r returns char *. */
+#ifdef __linux__
+#include <features.h>
+#endif
 #ifdef __GLIBC__
 /* Bootstrapping on GNU/Linux */
 #define STRERROR_R_CHAR_P 1