From 2f4680d14308e02bd52abbb81b6c9ae68febe818 Mon Sep 17 00:00:00 2001
From: Johannes Grunenberg <nerixdev@outlook.de>
Date: Thu, 5 Sep 2024 23:45:37 +0200
Subject: [PATCH] Disable q(u)int128 for Clang with MSVC's STL

Clang supports q(u)int128, however, MSVC's STL doesn't have support for
it in <type_traits> and <limits>. MSVC's STL is used by Clangd on
Windows.

Fixes: QTBUG-128675
Change-Id: Ic0be6b9d2659477829c7b369385ef885dee8d355
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
(cherry picked from commit 1f9a660eb2d5c6e3cb9c80dc292f3ec355296515)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 src/corelib/global/qtypes.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/corelib/global/qtypes.h b/src/corelib/global/qtypes.h
index 65bf01fac14..82de5176c1b 100644
--- a/src/corelib/global/qtypes.h
+++ b/src/corelib/global/qtypes.h
@@ -72,6 +72,9 @@ typedef quint64 qulonglong;
 #  if defined(__GLIBCXX__) && defined(__STRICT_ANSI__) // -ansi/-std=c++NN instead of gnu++NN
 #    undef QT_SUPPORTS_INT128                          // breaks <type_traits> on libstdc++
 #  endif
+#  if defined(__clang__) && defined(_MSVC_STL_VERSION) // Clang with MSVC's STL
+#    undef QT_SUPPORTS_INT128                          // MSVC's STL doesn't support int128
+#  endif
 #else
 #  undef QT_SUPPORTS_INT128
 #endif