From a45ac3eb694f5f8b4acdd270efb57f9ba54686c9 Mon Sep 17 00:00:00 2001
From: Laurent Rineau <laurent.rineau@cgal.org>
Date: Wed, 29 Jan 2025 16:28:48 +0100
Subject: [PATCH] fix the detection of <format> and std::format

---
 Installation/include/CGAL/config.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Installation/include/CGAL/config.h b/Installation/include/CGAL/config.h
index a154b5caad8..a9e215f26e2 100644
--- a/Installation/include/CGAL/config.h
+++ b/Installation/include/CGAL/config.h
@@ -461,6 +461,11 @@ namespace CGAL {
   using cpp11::copy_n;
 } // end of the temporary compatibility with CGAL-4.14
 #endif // CGAL_NO_DEPRECATED_CODE
+
+#if __has_include(<version>)
+#  include <version>
+#endif
+
 namespace CGAL {
 
 // Typedef for the type of nullptr.
@@ -501,7 +506,7 @@ namespace cpp11{
 #  define CGAL_FALLTHROUGH while(false){}
 #endif
 
-#if __cpp_lib_format >= 201907L || (__has_include(<format>) && (__cplusplus >= 202000L || _MSVC_LANG >= 202000L))
+#if __cpp_lib_format >= 201907L
 #  define CGAL_CAN_USE_CXX20_FORMAT 1
 #endif