Compilation failure regression on x86_64-fortanix-unknown-sgx target

[kostko]

With tokio 1.20.1 it was possible to build for the x86_64-fortanix-unknown-sgx target when not using the net feature since the socket2 dependency was optional and only enabled when net was enabled. With tokio 1.21.0 compilation now fails due to socket2 being required and built with the all feature flag which is not supported on the x86_64-fortanix-unknown-sgx target.

Could socket2 be removed as a dependency on x86_64-fortanix-unknown-sgx similar to how it is now on wasm* targets or if there is another course of action that would be more suitable to ensure compilation on x86_64-fortanix-unknown-sgx?

[carllerche]

Is there a way to add a cross-compilation check for this platform in CI? @kostko is that something you could submit a PR for?

[kostko]

Sure, just opened #5001 (need to test if it works on CI after the workflow gets approved). The test is just a simple build test as actually running some unit tests requires SGX hardware (and therefore some custom GitHub runners).

[kostko]

And thanks for the quick reply and fix!