Recognize mlibc
environment
#1488
Merged
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This PR serves to upstream the mlibc environment so that the
x86_64-unknown-managarm-mlibc
target can be upstreamed into rustc (see rust-lang/rust#123319) after this PR appears in a tagged release (and rustc bumps its cc-rs version for bootstrap).This is the triple upstreamed into LLVM (as of commit llvm/llvm-project@0f302f3), so no further changed are needed. Running the
rustc_target_test
with a rustc with this and the rustc PR applied succeeds, as do all other tests.