Fail to build for target Windows (on Mac)

[wchuan11]

Error message:

ERROR: While resolving toolchains for target @prysm//third_party/kafka:librdkafka: no matching toolchains found for types @bazel_tools//tools/cpp:toolchain_type
ERROR: Analysis of target '//beacon-chain:beacon-chain' failed; build aborted: no matching toolchains found for types @bazel_tools//tools/cpp:toolchain_type
INFO: Elapsed time: 0.416s.

Requires c++ toolchain to get it to work.

[prestonvanloon]

Related cross compile issues: #2849 #2974

[mtbitcoin]

Just to add more info to the above, the compilation for windows binaries on a Mac used too work before and only broke recently..

[wchuan11]

@nisdas If you manage to look into this, will test it out

[nisdas]

Hey @wchuan11 , I haven't been able to solve this so far. Unfortunately I am still blocked on this

[rauljordan]

Resolved by @SuburbanDad and @prestonvanloon

[wchuan11]

@SuburbanDad @prestonvanloon Is there any instructions or documentation to test on this?
Tested using bazel build --define=ssz=minimal --platforms=@io_bazel_rules_go//go/toolchain:windows_amd64 //beacon-chain does not work on Mac still.

[prestonvanloon]

Please see https://github.com/prysmaticlabs/prysm/blob/master/tools/cross-toolchain/README.md

The README needs to be updated since #5008 has been resolved. Try using the docker sandbox approach.

bazel build --config=windows_amd64_docker //beacon-chain