From 6bb937fa5f2a34a5b8515e94cad9ed8268a75e11 Mon Sep 17 00:00:00 2001
From: Andrey Semashev <andrey.semashev@gmail.com>
Date: Thu, 7 May 2020 14:35:47 +0300
Subject: [PATCH] Fixed compilation of gcd in C++20 mode with clang 10.

Due to the new overload resolution rules for comparison operators in C++20,
the comparison became ambiguous.
---
 include/boost/integer/common_factor_rt.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/boost/integer/common_factor_rt.hpp b/include/boost/integer/common_factor_rt.hpp
index 65f18d2..f9f26d3 100644
--- a/include/boost/integer/common_factor_rt.hpp
+++ b/include/boost/integer/common_factor_rt.hpp
@@ -129,7 +129,7 @@ namespace boost {
          BOOST_FORCEINLINE static BOOST_CXX14_CONSTEXPR unsigned make_odd(T& val) BOOST_GCD_NOEXCEPT(T)
          {
             unsigned r = 0;
-            while(0 == (val & 1u))
+            while (T(0) == (val & 1u))
             {
 #ifdef _MSC_VER  // VC++ can't handle operator >>= in constexpr code for some reason
                val = val >> 1;