swift

1d8a95fa - [build] Make the new `--cross-compile-build-swift-tools` flag public

[build] Make the new `--cross-compile-build-swift-tools` flag public This new flag makes it easy to build Swift cross-compilation toolchains, by disabling cross-compilation of all host tools, like the Swift compiler and various macros, building on prior pulls #38441 and #82163. Also, add two class methods to the Testing macros product so it works with #83260.