From 51ae3da5ec6a575c8d7b003f62e72af65a03949a Mon Sep 17 00:00:00 2001
From: jl777 <jameslee777@yahoo.com>
Date: Thu, 21 Feb 2019 02:38:45 -1100
Subject: [PATCH] #ifdef __cplusplus

---
 src/secp256k1/src/ecmult.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/secp256k1/src/ecmult.h b/src/secp256k1/src/ecmult.h
index fbcf6a445..3ed2e435a 100644
--- a/src/secp256k1/src/ecmult.h
+++ b/src/secp256k1/src/ecmult.h
@@ -78,6 +78,10 @@ typedef int (secp256k1_ecmult_multi_callback)(secp256k1_scalar *sc, secp256k1_ge
  *          0 if there is not enough scratch space for a single point or
  *          callback returns 0
  */
+
+#ifdef __cplusplus
+extern "C"
+#endif
 int secp256k1_ecmult_multi_var(const secp256k1_ecmult_context *ctx, secp256k1_scratch *scratch, secp256k1_gej *r, const secp256k1_scalar *inp_g_sc, secp256k1_ecmult_multi_callback cb, void *cbdata, size_t n);
 
 #endif /* SECP256K1_ECMULT_H */