From b0ac9bf669d20ae211cc3e004060c1d7fa1e4f37 Mon Sep 17 00:00:00 2001
From: "Christoph M. Becker" <cmbecker69@gmx.de>
Date: Thu, 15 Aug 2024 14:30:23 +0200
Subject: [PATCH] Explicitly drop support for old clang versions on Windows
 (GH-15415)

* Explicitly drop support for old clang versions on Windows

This ensures compatibility with the typedef redefinitions we use, and
makes it clear during the `configure` stage that old compiler versions
are not supported.

See <https://releases.llvm.org/> regarding the release history of clang.

We also remove support for two number versions of clang, since as of
LLVM 4.0.0 the project uses a three number versioning scheme; see
<https://blog.llvm.org/2016/12/llvms-new-versioning-scheme.html>.
---
 win32/build/confutils.js | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/win32/build/confutils.js b/win32/build/confutils.js
index b72950954c0..78d4291f2fe 100644
--- a/win32/build/confutils.js
+++ b/win32/build/confutils.js
@@ -3073,8 +3073,9 @@ function toolset_get_compiler_version()
 		if (full.match(/clang version ([\d\.]+)/)) {
 			version = RegExp.$1;
 			version = version.replace(/\./g, '');
-			version = version/100 < 1 ? version*10 : version;
-
+			if (version < 400) {
+				ERROR("Building with clang " + version + " is no longer supported");
+			}
 			return version;
 		}
 	} else if (ICC_TOOLSET) {