https://github.com/tpm2-software/tpm2-tools/commit/c2b2c4e5cdc5bbc61779eb4271d5c317efb8c067

From c2b2c4e5cdc5bbc61779eb4271d5c317efb8c067 Mon Sep 17 00:00:00 2001
From: Bernd Kuhls <bernd@kuhls.net>
Date: Sat, 12 Sep 2026 13:22:13 +0200
Subject: [PATCH] lib/object.h: include openssl/err.h

Fixes build error with OpenSSL 4.1.0-alpha1:

lib/object.c: In function 'PEM_read_bio_TSSPRIVKEY_OBJ':
lib/object.c:28:1: error: implicit declaration of function 'ERR_raise' [-Wimplicit-function-declaration]
   28 | IMPLEMENT_PEM_read_bio(TSSPRIVKEY_OBJ, TSSPRIVKEY_OBJ, TSSPRIVKEY_OBJ_PEM_STRING,

lib/object.c:28:1: error: 'ERR_LIB_PEM' undeclared (first use in this function)
   28 | IMPLEMENT_PEM_read_bio(TSSPRIVKEY_OBJ, TSSPRIVKEY_OBJ, TSSPRIVKEY_OBJ_PEM_STRING,

lib/object.c:28:1: error: 'ERR_R_ASN1_LIB' undeclared (first use in this function)
   28 | IMPLEMENT_PEM_read_bio(TSSPRIVKEY_OBJ, TSSPRIVKEY_OBJ, TSSPRIVKEY_OBJ_PEM_STRING,

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
--- a/lib/object.h
+++ b/lib/object.h
@@ -6,6 +6,7 @@
 #include "tpm2_util.h"
 
 #include <openssl/pem.h>
+#include <openssl/err.h>
 #include <openssl/bio.h>
 #include <openssl/asn1.h>
 #include <openssl/asn1t.h>