[bug#57430] [PATCH] gnu: wayland-protocols: Fix cross-compilation

[Tobias Kortkamp <tobias.kortkamp@gmail.com>]

On Fri, Aug 26, 2022 at 08:58:51PM +0200, Maxime Devos wrote:
> Tobias, does unconditionally moving wayland from 'inputs' to 'native-inputs'
> (and unconditionally using pkg-config-for-build) work? Potential problem:
> lots of dependents according to "guix refresh -l", making it unconditional
> would need to be done on core-updates or staging.

You mean change the patch like this?

-    (inputs
-     (list wayland))
-    (native-inputs (cons* pkg-config python
-                          (if (%current-target-system)
-                              (list pkg-config-for-build
-                                    wayland) ; for wayland-scanner
-                              '())))
+    (native-inputs (list pkg-config pkg-config-for-build wayland python))

No, it doesn't work:

Run-time dependency wayland-client found: NO (tried pkgconfig)

../wayland-protocols-1.23/tests/meson.build:4:0: ERROR: Dependency "wayland-client" not found, tried pkgconfig

What would work is:

+    (arguments `(#:configure-flags (list "-Dtests=false")))
+    (native-inputs (list pkg-config-for-build wayland))

But this turns off the tests. Even then it still looks for
wayland-scanner for some reason.