[Bug] Cross-compile fails with mingw-w64 for Windows GNU target

[samcarey]

Describe the bug

Cross compiling for the windows-gnu toolchain fails for the currently locked version of librocksdb-sys = "=0.17.1".

It fails on both my development Mac and on my Debian CI container.

On my Mac, I patched it to librocksdb-sys = "=0.17.3" in zenoh-backend-rocksdb and zenoh-pinned-deps-1-75 and then it compiled fine.

It would be really awesome to get this fixed because this is the only reason I have to run my CI builds for Windows on a Windows server (for the MSVC toolchain) instead of just doing a GNU build in a Linux container.

To reproduce

On MacOS (M2):

brew install mingw-w64
rustup target add x86_64-pc-windows-gnu
cargo build --target=x86_64-pc-windows-gnu

System info

Apple M2, MacOS 15.7

[oteffahi]

Hello @samcarey,
At the moment we unfortunately cannot bump librocksdb-sys to 0.17.3, since they bumped the MSRV to 1.85 on that release. Zenoh needs to compile on 1.75 due to requirements from rmw_zenoh and the ROS2 ecosystem, and due to how our plugins work, plugin compatibility requires (AFAIK) compiling with the same version of rustc.

[samcarey]

Thanks for the reply!
Looks like it might be a long time before upgrade is possible (next Ubuntu LTS release?)
I wonder if there's a way to make this limitation optional for those of us that don't use ROS2.
I guess I'll just fork everything until then.
Thanks again!