Add meson properties field, and specificy needs_exe_wrapper depending…

[avetiso]

… on cross conditions.

Changelog: Feature: Add detection in meson toolchain for cross conditions and requirement of needs_exe_wrapper. Users may specify the exe wrapper in their meson.build now.
Docs: omit

Issue: #10796

Not sure if docs are required, as this is probably expected behavior of the generator for someone who understands what meson is looking for. Happy to write some docs, though.

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[eli-schwartz]

Users may specify the exe wrapper in their meson.build now.

Err... I assume you mean something other than the meson.build file which is read by meson setup?

[avetiso]

Users may specify the exe wrapper in their meson.build now.

Err... I assume you mean something other than the meson.build file which is read by meson setup?

Maybe? That's where I've seen most examples of exe_wrappers being set. Feel free to correct me here.

[avetiso]

Users may specify the exe wrapper in their meson.build now.

Err... I assume you mean something other than the meson.build file which is read by meson setup?

Also, for the case of (arch_build != arch_host), do you think it makes sense to be explicit here re: needs_exe_wrapper when meson probably guess this correctly?

[memsharded]

Some tests that covers this would be necessary. I'd recommend an integration test, doesn't need to actually build anything, just check the generated file contents under several conditions.

[avetiso]

Test for presence of fields in Android and iOS cross builds, and test for lack of presence in a native build. @memsharded let me know what you think. Seemed to make more sense to put the tests there rather in anything under integration/.

[avetiso]

@memsharded any update feedback?

[memsharded]

Merged for 1.47, thanks!