tree 71c7c08608bdd26a997a794e594e6dc4f105f8c9
parent eb0bee078ef266a0dc986ee3045ce54ffeeb83df
author linesight <ted.lin0000@gmail.com> 1783442659 -0700
committer swiftshader-scoped@luci-project-accounts.iam.gserviceaccount.com <swiftshader-scoped@luci-project-accounts.iam.gserviceaccount.com> 1783461363 -0700

Vulkan: Build Wayland WSI against libwayland older than 1.20

The Wayland WSI marshalled requests via wl_proxy_marshal_flags and used
WL_MARSHAL_FLAG_DESTROY, both introduced in libwayland 1.20 (1.19.91).
SwiftShader's bundled headers are 1.21 so the standalone build compiled,
but embedded builds that use the host's Wayland headers fail where those
are older: rolling into Dawn on Debian 11 (Bullseye, Wayland 1.18) broke
with "error: use of undeclared identifier 'WL_MARSHAL_FLAG_DESTROY'".

Marshal requests through the older wl_proxy_marshal /
wl_proxy_marshal_constructor / wl_proxy_marshal_constructor_versioned
primitives instead. These have existed since libwayland 1.2 and are
exactly what the generated static-inline wrappers used prior to 1.20, so
this needs neither the 1.20-only wl_proxy_marshal_flags symbol at runtime
nor the WL_MARSHAL_FLAG_DESTROY macro at compile time, and introduces no
new minimum libwayland version.

Change-Id: I965424d33c9420a8d6832009099190e1174c46cb
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/77608
Tested-by: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@google.com>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>