windows: always use RtlGenRandom on pre-1.78 Rust versions
#610
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newpavlov
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Mar 17, 2025
### Added - `efi_rng` opt-in backend [#570] - `linux_raw` opt-in backend [#572] - `.cargo/config.toml` example in the crate-level docs [#591] - `getrandom_test_linux_without_fallback` configuration flag to test that file fallback is not triggered in the `linux_android_with_fallback` backend [#605] - Built-in support for `*-linux-none` targets [#618] - Cygwin support [#626] ### Changed - Update `wasi` dependency to v0.14 [#594] - Add `#[inline]` attribute to the inner functions [#596] - Update WASI and Emscripten links in the crate-level docs [#597] - Do not use `dlsym` on MUSL targets in the `linux_android_with_fallback` backend [#602] - Remove `linux_android.rs` and use `getrandom.rs` instead [#603] - Always use `RtlGenRandom` on Windows targets when compiling with pre-1.78 Rust [#610] - Internal representation of the `Error` type [#614] - Remove `windows-targets` dependency and use [`raw-dylib`] directly [#627] ### Removed - `Error::INTERNAL_START` and `Error::CUSTOM_START` associated constants [#614] [#570]: #570 [#572]: #572 [#591]: #591 [#594]: #594 [#596]: #596 [#597]: #597 [#602]: #602 [#603]: #603 [#605]: #605 [#610]: #610 [#614]: #614 [#618]: #618 [#626]: #626 [#627]: #627 [`raw-dylib`]: https://doc.rust-lang.org/reference/items/external-blocks.html?highlight=link#dylib-versus-raw-dylib
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This PR adds detection of Rust compiler version in the build script while compiling the crate for Windows targets.
If the version is smaller than 1.78, then we switch to the
windows7backend for all Windows targets. This is necessary because on those older versions we can not disambiguate between win7 and win10 based on target triplet.Close #608