wayland: Switch to MesonToolchain generator to allow cross-compiling

[jwillikers]

Specify library name and version: wayland

Fixes issue #11332 and issue #11362. See issue #11579 for an explanation of why the package requires itself as a tool_requires.

Let me know if this PR should be a draft until MesonToolchain is supported and I will mark it as such.

---

• I've read the guidelines for contributing.
• I've followed the PEP8 style guides for Python code in the recipes.
• I've used the latest Conan client version.
• I've tried at least one configuration locally with the conan-center hook activated.

[github-actions]

Hooks produced the following warnings for commit 9ef8b87

wayland/1.21.0

post_package(): WARN: [MISSING SYSTEM LIBS (KB-H043)] Library './lib/libwayland-client.so' links to system library 'rt' but it is not in cpp_info.system_libs.
post_package(): WARN: [MISSING SYSTEM LIBS (KB-H043)] Library './lib/libwayland-server.so' links to system library 'rt' but it is not in cpp_info.system_libs.

[uilianries]

LGTM

[conan-center-bot]

All green in build 15 (30e49a06b4e29076891fd0a8d86f152869ef4920):

• wayland/1.21.0@:
  All packages built successfully! (All logs)

  🔸 Informative: This recipe is not ready for Conan v2

  _{We have started the migration process to Conan v2 and exporting recipes successfully will be required in the future.
  This is just an informative note to gain awareness about the process, no need to take any action. The plan is to enforce smaller steps that are easier to fix and, eventually, this conan export step will work.
  See the recipe migration guide to know more about the changes required.}

  wayland/1.21.0: Exporting package recipe
  wayland/1.21.0 exports: File 'conandata.yml' found. Exporting it...
  wayland/1.21.0: Copied 1 '.yml' file: conandata.yml
  wayland/1.21.0 exports: Copied 1 '.yml' file: conandata.yml
  ERROR: [HOOK - hook_reduce_conandata.py] post_export(): post_export() missing 3 required positional arguments: 'conanfile', 'conanfile_path', and 'reference'
  

• wayland/1.19.0@:
  All packages built successfully! (All logs)

  🔸 Informative: This recipe is not ready for Conan v2

  _{We have started the migration process to Conan v2 and exporting recipes successfully will be required in the future.
  This is just an informative note to gain awareness about the process, no need to take any action. The plan is to enforce smaller steps that are easier to fix and, eventually, this conan export step will work.
  See the recipe migration guide to know more about the changes required.}

  wayland/1.19.0: Exporting package recipe
  wayland/1.19.0 exports: File 'conandata.yml' found. Exporting it...
  wayland/1.19.0: Copied 1 '.yml' file: conandata.yml
  wayland/1.19.0 exports: Copied 1 '.yml' file: conandata.yml
  ERROR: [HOOK - hook_reduce_conandata.py] post_export(): post_export() missing 3 required positional arguments: 'conanfile', 'conanfile_path', and 'reference'
  

• wayland/1.18.0@:
  All packages built successfully! (All logs)

  🔸 Informative: This recipe is not ready for Conan v2

  _{We have started the migration process to Conan v2 and exporting recipes successfully will be required in the future.
  This is just an informative note to gain awareness about the process, no need to take any action. The plan is to enforce smaller steps that are easier to fix and, eventually, this conan export step will work.
  See the recipe migration guide to know more about the changes required.}

  wayland/1.18.0: Exporting package recipe
  wayland/1.18.0 exports: File 'conandata.yml' found. Exporting it...
  wayland/1.18.0: Copied 1 '.yml' file: conandata.yml
  wayland/1.18.0 exports: Copied 1 '.yml' file: conandata.yml
  ERROR: [HOOK - hook_reduce_conandata.py] post_export(): post_export() missing 3 required positional arguments: 'conanfile', 'conanfile_path', and 'reference'
  

• wayland/1.20.0@:
  All packages built successfully! (All logs)

  🔸 Informative: This recipe is not ready for Conan v2

  _{We have started the migration process to Conan v2 and exporting recipes successfully will be required in the future.
  This is just an informative note to gain awareness about the process, no need to take any action. The plan is to enforce smaller steps that are easier to fix and, eventually, this conan export step will work.
  See the recipe migration guide to know more about the changes required.}

  wayland/1.20.0: Exporting package recipe
  wayland/1.20.0 exports: File 'conandata.yml' found. Exporting it...
  wayland/1.20.0: Copied 1 '.yml' file: conandata.yml
  wayland/1.20.0 exports: Copied 1 '.yml' file: conandata.yml
  ERROR: [HOOK - hook_reduce_conandata.py] post_export(): post_export() missing 3 required positional arguments: 'conanfile', 'conanfile_path', and 'reference'
  

[jwillikers]

@SSE4 PTAL

[jwillikers]

@uilianries Can you re-review for me? Thanks.

[SSE4]

@uilianries Can you re-review for me? Thanks.

I regret to inform you, but unfortunately @uilianries is on vacation and cannot review PRs. sorry about that.

[prince-chrismc]

Seems like a significant enough improvement to merge in. I am not 100% sure I understood the problem that was linked against in the description but this looks to match.

[ericLemanissier]

@jwillikers The usage of get_pc_files_and_content now breaks on recent versions of conan : ModuleNotFoundError: No module named 'conan.tools.gnu.pkgconfigdeps.pc_files_creator'; 'conan.tools.gnu.pkgconfigdeps' is not a package
Do you have another suggestion of implementation, which does not rely on non-documented features ?

EDIT: this is already being discussed in #12722, and should be fixed with conan-io/conan#11710

[jwillikers]

@ericLemanissier Yes, sorry about that. I will respond to that issue.