From 08dced51e9a688ec3e9c1b7c5f90c99f2b1cdca7 Mon Sep 17 00:00:00 2001
From: jzmaddock <john@johnmaddock.co.uk>
Date: Thu, 24 Feb 2022 11:38:17 +0000
Subject: [PATCH] Make checks for <version> C++ specific.

---
 include/boost/config/detail/suffix.hpp | 2 +-
 include/boost/config/stdlib/libcpp.hpp | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/boost/config/detail/suffix.hpp b/include/boost/config/detail/suffix.hpp
index b8b37d0b4..2423c35d6 100644
--- a/include/boost/config/detail/suffix.hpp
+++ b/include/boost/config/detail/suffix.hpp
@@ -1202,7 +1202,7 @@ namespace std{ using ::type_info; }
 #endif
 #endif
 
-#ifdef __has_include
+#if defined(__cplusplus) && defined(__has_include)
 #if !__has_include(<version>)
 #  define BOOST_NO_CXX20_HDR_VERSION
 #else
diff --git a/include/boost/config/stdlib/libcpp.hpp b/include/boost/config/stdlib/libcpp.hpp
index fc1d5bb4a..bc8536ead 100644
--- a/include/boost/config/stdlib/libcpp.hpp
+++ b/include/boost/config/stdlib/libcpp.hpp
@@ -104,7 +104,7 @@
 #  define BOOST_NO_CXX98_BINDERS
 #endif
 
-#ifdef __has_include
+#if defined(__cplusplus) && defined(__has_include)
 #if __has_include(<version>)
 #include <version>