From 92b2c38a2c51a1942a380c7ee08147f7b1ca6845 Mon Sep 17 00:00:00 2001

From: Luca Boccassi <bluca@debian.org>

Date: Sun, 13 Jun 2021 16:21:07 +0100

Subject: [PATCH] Problem: build with curve fails on GCC 11

Solution: ignore false positives due to compiler bug:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99578

Fixes https://github.com/zeromq/libzmq/issues/4206

---

 src/curve_client_tools.hpp | 10 ++++++++++

 1 file changed, 10 insertions(+)

diff --git a/src/curve_client_tools.hpp b/src/curve_client_tools.hpp

index 3c098ba937..7e0d25b3a4 100644

--- a/src/curve_client_tools.hpp

+++ b/src/curve_client_tools.hpp

@@ -180,6 +180,12 @@ struct curve_client_tools_t

         //  Create Box [C + vouch + metadata](C'->S')

         std::fill (initiate_plaintext.begin (),

                    initiate_plaintext.begin () + crypto_box_ZEROBYTES, 0);

+

+        //  False positives due to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99578

+#if __GNUC__ >= 11

+#pragma GCC diagnostic ignored "-Warray-bounds"

+#pragma GCC diagnostic ignored "-Wstringop-overflow="

+#endif

         memcpy (&initiate_plaintext[crypto_box_ZEROBYTES], public_key_, 32);

         memcpy (&initiate_plaintext[crypto_box_ZEROBYTES + 32], vouch_nonce + 8,

                 16);

@@ -189,6 +195,10 @@ struct curve_client_tools_t

             memcpy (&initiate_plaintext[crypto_box_ZEROBYTES + 48 + 80],

                     metadata_plaintext_, metadata_length_);

         }

+#if __GNUC__ >= 11

+#pragma GCC diagnostic pop

+#pragma GCC diagnostic pop

+#endif

         memcpy (initiate_nonce, "CurveZMQINITIATE", 16);

         put_uint64 (initiate_nonce + 16, cn_nonce_);