[qt/clang/llvm-project]: Summary of bulk changes made

Git repository change summary for qt/clang/llvm-project
Pushed by mirror-service into branch 'upstream/release/23.x'.
Changed from fa70bdd819bbb0e2b22f20ad7e79edfcbfd4a0cd to 45a9d73790257968607978479cbc1d1956047522
Acknowledgement was received that this change introduces only existing code that has been pushed to another public open source repository.

This change contains the following new commits:

Git commit 1fee366f08583eb003345461cbdd8a09bc5d144f by Douglas Yung (on behalf of Haowei) on 05/08/2026 at 03:12..
Reapply "Skipping host target exports during cross-compilation" (#210… (#210496)

This reverts commit 42eb7db188f23625872b6f1d722979a3100d170e. This
reland 3fbb037d03e7ff1ef1cd9156363e895af7caaf98 (#209922).

Under CMake 4+, calling add_library(... SHARED IMPORTED) on a target
platform that lacks dynamic linking support triggers a fatal error. This
becomes an issue when building LLVM and runtimes for baremetal targets
like armv6m-none-eabi. This patch adds the option
"LLVM_OMIT_EXPORTS_FROM_CONFIG" in LLVM. When used in sub builds like
LLVM runtimes, it makes CMake to skip including the LLVM and Clang
exports. This mitigates the CMake 4 errors on baremetal runtimes.

42eb7db188f23625872b6f1d722979a3100d170e originally
apply this flag on all runtimes build and causing issues on runtimes
like intel-sycl-gpu, amdgpu-offload-ubuntu-22-cmake-build-only.
This PR only set this flag when the target platform lacks shared library
support.

(cherry picked from a04f87fdd9b59c6089bf731c669c6f149208363c and
91406e8dff2b1578ff4dd22593ea1a8039b074a4)
https://invent.kde.org/qt/clang/llvm-project/-/commit/1fee366f08583eb003345461cbdd8a09bc5d144f

Git commit 6a58ab22a4d41277277f50e16d3b235c9d9010a6 by Douglas Yung (on behalf of Paulius Velesko) on 05/08/2026 at 03:13..
[ExpandVariadics] Don't lower unmangled C printf on SPIR-V (#206998)

An unmangled C `printf` declaration demangles to bare `printf` (no
argument list), so `SPIRV::ignoreFunction`'s `printf(` prefix check
missed it and ExpandVariadics packed its arguments into a vararg buffer;
the SPIR-V backend then passed the buffer pointer as printf's first
variadic operand, so device printf printed pointer values instead of the
actual arguments. Match the bare name too so OpenCL/HIP printf (emitted
unmangled) is left as a variadic call for the backend's OpenCL.std
printf lowering.

(cherry picked from commit b1d21c6d3121898dc13c0df8cf9e4410bee75cfb)
https://invent.kde.org/qt/clang/llvm-project/-/commit/6a58ab22a4d41277277f50e16d3b235c9d9010a6

Git commit 45a9d73790257968607978479cbc1d1956047522 by Douglas Yung (on behalf of Tom Stellard) on 05/08/2026 at 03:14..
workflows/upload-release-artifact: Use new self-repository reference (#213366)

This is for composite actions.

https://github.blog/changelog/2026-07-30-reference-same-repository-actions-with-self-repository-syntax/
(cherry picked from commit 37f4eeee65940dcac53e816c4b324fb607328e0e)
https://invent.kde.org/qt/clang/llvm-project/-/commit/45a9d73790257968607978479cbc1d1956047522