[RFC PATCH 0/6] Use Clang for compiling in the 64-bit MSYS2 job

[Thomas Huth <thuth@redhat.com>]

The 64-bit MSYS2 job often times out in our CI, though we already have
limited it to a very minimum by using --without-default-devices etc.
GCC is incredibly slow here. By using Clang instead of GCC, the job
is ca. 15 minutes faster - that's enough buffer to avoid the timeouts
here.

The caveat is that Clang does not support __attribute__((gcc_struct))
on Windows. So we have to make sure that our structs are still padded
right. By checking the build with "pahole", Daniel discovered that
there is still an issue in VTD_IR_TableEntry, so that's why this
struct gets changed in this patch series, too. All other structs did
not show a difference with "pahole", so building with Clang should
hopefully be fine after these modifications here.

Daniel P. Berrangé (1):
  gitlab: remove duplication between msys jobs

Marc-André Lureau (1):
  ui/dbus: fix clang compilation issue

Thomas Huth (4):
  util/oslib-win32: Fix compiling with Clang from MSYS2
  hw/i386/intel_iommu: Fix VTD_IR_TableEntry for ms_struct layout
  include/qemu/compiler: Fix problem with gcc_struct and Clang
  gitlab-ci.d/windows: Use Clang for compiling in the 64-bit MSYS2 job

 include/hw/i386/intel_iommu.h |  14 ++--
 include/qemu/compiler.h       |   2 +-
 hw/i386/intel_iommu.c         |   2 +-
 ui/dbus-listener.c            |   3 +-
 util/oslib-win32.c            |   4 +-
 .gitlab-ci.d/windows.yml      | 134 +++++++++++++---------------------
 6 files changed, 65 insertions(+), 94 deletions(-)

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2.39.3