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diff --git a/libotr/libgpg-error-1.42/src/posix-lock-obj.h b/libotr/libgpg-error-1.42/src/posix-lock-obj.h
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+++ b/libotr/libgpg-error-1.42/src/posix-lock-obj.h
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+/* posic-lock-obj.h - Declaration of the POSIX lock object
+   Copyright (C) 2014 g10 Code GmbH
+
+   This file is part of libgpg-error.
+
+   libgpg-error is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public License
+   as published by the Free Software Foundation; either version 2.1 of
+   the License, or (at your option) any later version.
+
+   libgpg-error is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this program; if not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef POSIX_LOCK_OBJ_H
+#define POSIX_LOCK_OBJ_H
+
+#define LOCK_ABI_NOT_AVAILABLE (-1)
+#if USE_POSIX_THREADS
+# define LOCK_ABI_VERSION 1
+#else
+# define LOCK_ABI_VERSION LOCK_ABI_NOT_AVAILABLE
+#endif
+
+typedef struct
+{
+  long vers;
+#if USE_POSIX_THREADS
+  union {
+    pthread_mutex_t mtx;
+    long *dummy;
+  } u;
+#endif
+} _gpgrt_lock_t;
+
+
+#endif /*POSIX_LOCK_OBJ_H*/