From 1bdf8e7e10d28b5f3ae18abc62fcf2837bc4ba62 Mon Sep 17 00:00:00 2001
From: Laurent Rineau <laurent.rineau@cgal.org>
Date: Wed, 14 May 2025 10:25:59 +0200
Subject: [PATCH] fix for clang

---
 .gitignore                        | 1 +
 STL_Extension/include/CGAL/tags.h | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/.gitignore b/.gitignore
index e23fc64ddc2..06cfbf3d2f8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1171,3 +1171,4 @@ log.txt
 patches_after_merge.ply
 CMakeUserPresets.json
 /.cache
+compile_commands.json
diff --git a/STL_Extension/include/CGAL/tags.h b/STL_Extension/include/CGAL/tags.h
index fd4ef451317..ce57be5e69e 100644
--- a/STL_Extension/include/CGAL/tags.h
+++ b/STL_Extension/include/CGAL/tags.h
@@ -97,7 +97,7 @@ struct Remove_needs_FT<Needs_FT<T> >
 
 } // namespace CGAL
 
-#ifdef CGAL_LINKED_WITH_TBB
+#if __cpp_lib_execution >= 201603L && defined(CGAL_LINKED_WITH_TBB)
 #  include <execution>
 
 namespace CGAL {