Made headers compatible with C++.

inc/bearssl_block.h

@@ -28,6 +28,10 @@
 #include <stddef.h>
 #include <stdint.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /** \file bearssl_block.h
  *
  * # Block Ciphers and Symmetric Ciphers
@@ -1802,4 +1806,8 @@ void br_poly1305_ctmulq_run(const void *key, const void *iv,
  */
 br_poly1305_run br_poly1305_ctmulq_get(void);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif