From 339b1580ea6f82d0f05e2e1efd5410b21aff7430 Mon Sep 17 00:00:00 2001
From: Luca Bacci <luca.bacci982@gmail.com>
Date: Fri, 27 Mar 2026 14:34:12 +0100
Subject: [PATCH] Meson: Fix compilation with CLangCL

Support for __uint128_t in CLangCL is currently broken [1].
Avoid using that type for now.

As of today MSVC doesn't support 128-bit integral types;
with this change we get feature-parity between MSVC and
CLangCL, so this shouldn't be a problem.

References:

 * Clang-cl generates a call to an undefined symbol __udivti3
   https://github.com/llvm/llvm-project/issues/25679
---
 meson.build | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/meson.build b/meson.build
index 11525ea84..48fd6bb13 100644
--- a/meson.build
+++ b/meson.build
@@ -148,9 +148,13 @@ check_headers = [
 check_types = [
   ['uint64_t', {'headers': ['stdint.h']}],
   ['uint128_t', {'headers': ['stdint.h']}],
-  ['__uint128_t']
 ]
 
+# https://github.com/llvm/llvm-project/issues/25679
+if cc.get_id() != 'clang-cl'
+  check_types += [ ['__uint128_t'] ]
+endif
+
 check_funcs = [
   'alarm',
   'ctime_r',