# enable pthread APIs disabled by our _POSIX_SOURCE definitions
--- openssl-source/crypto/threads_pthread.c.orig
+++ openssl-source/crypto/threads_pthread.c
@@ -6,6 +6,8 @@
  * in the file LICENSE in the source distribution or at
  * https://www.openssl.org/source/license.html
  */
+#undef _POSIX_C_SOURCE
+#undef _POSIX_SOURCE

 #include <openssl/crypto.h>
 #include "internal/cryptlib.h"