How to setup ICC and Bazel on Windows

Hi, I setup my bazel environment on Windows, which uses clang by default. I found that `CROSSTOOL` allows me to set a compiler, but the documentation is very poor on this. Is there any resource available that explains how I can change the default compiler of Bazel to ICC on Windows?

The most promising solution I found is simply setting `CC` but `CC=icc.exe` doesn't invoke the compiler as expected and still uses clang. Any help is highly appreciated!

Review the Bazel documentation around CROSSTOOL and Windows toolchain selection, then compare it with the reported CC=icc.exe behavior. Done means a documented, reproducible way to select ICC on Windows, or a clear statement of support and limitations.

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