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Expose elf abi on ppc64 targets Fixes https://github.com/rust-lang/rust/issues/60617 (after MCP https://github.com/rust-lang/compiler-team/issues/885 is accepted) by exposing the abi information on ppc64 targets. Conditional compilation can now use `cfg(target_abi = "elfv1")` or `cfg(target_abi = "elfv2")` to determine the abi in use. Technical details are included in the other PR https://github.com/rust-lang/rust/pull/142598
rustc_target contains some very low-level details that are
specific to different compilation targets and so forth.
For more information about how rustc works, see the rustc dev guide.