From 22b0454b811d14ad8960c59dc9f155e302a6e833 Mon Sep 17 00:00:00 2001
From: Alex <viciousvex@users.noreply.github.com>
Date: Sat, 7 Aug 2021 21:42:51 +0200
Subject: [PATCH] Added compatibility with GNU GCC 11 Toolchain (#811)

This fixes compilation issues when using GNU GCC >=11 where parameter -std=gnu++17 is used by default. Resolves #802
---
 src/Makefile | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/Makefile b/src/Makefile
index c49471f7..4f9796b6 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -174,6 +174,15 @@ ifeq "$(shell uname -s)" "Linux"
 
 	PLATFORM := Linux
 	C_CXX_FLAGS += -DTC_UNIX -DTC_LINUX
+
+	# GNU GCC version 11 and higher compile with -std=gnu++17 by default
+        # which breaks "byte" definitions in Crypto++ library. So set 
+        # -std=gnu++14 instead.
+        GCC11PLUS := $(shell expr `$(CC) -dumpversion | cut -f1 -d.` \>= 11)
+        ifeq "$(GCC11PLUS)" "1"
+                CXXFLAGS += -std=gnu++14
+        endif
+
 	
 	ifeq "$(SIMD_SUPPORTED)" "1"
 		CFLAGS += -msse2