Auto merge of #120232 - c272:json-buildstd, r=Mark-Simulacrum

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Add support for custom JSON targets when using build-std.

Currently, when building with `build-std`, some library build scripts check properties of the target by inspecting the target triple at `env::TARGET`, which is simply set to the filename of the JSON file when using JSON target files.

This patch alters these build scripts to use `env::CARGO_CFG_*` to fetch target information instead, allowing JSON target files describing platforms without `restricted_std` to build correctly when using `-Z build-std`. There are some weak assertions here (for example, `nintendo && newlib`), however this seems at least a marginal improvement on the existing solution.

Fixes https://github.com/rust-lang/wg-cargo-std-aware/issues/60.

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bors 2024-02-11 02:10:17 +00:00

parent 5275802bd7 66be6c7490

commit 97741eb11d

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