Re: [Buildroot] [PATCH] package/qt6: fix c++ static_assert issue

[Thomas Perale via buildroot <buildroot@buildroot.org>]

In reply of:
> Since the last qt6 version bump to 6.11.1 [1], the TestQuazipQt6 fail to
> build due to a c++ static_assert issue.
> 
> Backport a patch from v6.11.2 release.
> 
> Fixes:
> https://gitlab.com/buildroot.org/buildroot/-/jobs/16060153667 (TestQuazipQt6)
> 
> [1] https://github.com/qt/qtbase/commit/2983318421d623c6c9feff95ff947ca489f4313d
> 
> Signed-off-by: Romain Naour <romain.naour@smile.fr>

Applied to 2026.05.x. Thanks

> ---
>  ...e.cpp-remove-is_always_lock_free-sta.patch | 41 +++++++++++++++++++
>  1 file changed, 41 insertions(+)
>  create mode 100644 package/qt6/qt6base/0001-qtestsupport_core.cpp-remove-is_always_lock_free-sta.patch
> 
> diff --git a/package/qt6/qt6base/0001-qtestsupport_core.cpp-remove-is_always_lock_free-sta.patch b/package/qt6/qt6base/0001-qtestsupport_core.cpp-remove-is_always_lock_free-sta.patch
> new file mode 100644
> index 0000000000..3347caa8da
> --- /dev/null
> +++ b/package/qt6/qt6base/0001-qtestsupport_core.cpp-remove-is_always_lock_free-sta.patch
> @@ -0,0 +1,41 @@
> +From 2983318421d623c6c9feff95ff947ca489f4313d Mon Sep 17 00:00:00 2001
> +From: Mitch Curtis <mitch.curtis@qt.io>
> +Date: Mon, 11 May 2026 08:41:08 +0800
> +Subject: [PATCH] qtestsupport_core.cpp: remove is_always_lock_free
> + static_assert
> +
> +This causes a build failure when cross-compiling Qt for MIPS32 targets
> +(e.g. `mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`).
> +
> +Amends 9b938823776865837901f29082301f5624ac2b04.
> +
> +Fixes: QTBUG-146670
> +Change-Id: I170bd9f93c1ef809f56e5b36835e457bbbe8e16c
> +Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
> +Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
> +
> +Upstream: https://github.com/qt/qtbase/commit/2983318421d623c6c9feff95ff947ca489f4313d
> +[Romain: backport to 6.11.1]
> +Signed-off-by: Romain Naour <romain.naour@smile.fr>
> +---
> + src/corelib/kernel/qtestsupport_core.cpp | 4 ----
> + 1 file changed, 4 deletions(-)
> +
> +diff --git a/src/corelib/kernel/qtestsupport_core.cpp b/src/corelib/kernel/qtestsupport_core.cpp
> +index 9bbe1c18e84..5f28cedec68 100644
> +--- a/src/corelib/kernel/qtestsupport_core.cpp
> ++++ b/src/corelib/kernel/qtestsupport_core.cpp
> +@@ -8,10 +8,6 @@
> + 
> + using namespace std::chrono_literals;
> + 
> +-// Assert that this instantiation of std::atomic is always lock-free so we
> +-// know that no code will execute on destruction.
> +-static_assert(std::atomic<std::chrono::milliseconds>::is_always_lock_free);
> +-
> + QT_BEGIN_NAMESPACE
> + 
> + // ### Qt 7: reduce the default: QTBUG-138160
> +-- 
> +2.55.0
> +
> -- 
> 2.55.0
> 
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