rust - How can I build just the core libraries (libstd, libcore, ...) from source, without building the whole compiler toolchain? -

my current work flow requires me rebuild rust compiler every day "standard crates" libstd target platform (arm-unknown-linux-gnueabihf).

this not ideal. use nightly compiler, able target arm platform, not include standard libraries arm, host machines platform.

how can build libraries source, without building whole compiler toolchain 3 compiler stages, llvm, jemalloc, etc...?

can't i'm 100% sure, might work.

run:

rustc -v --version

make note of commit-hash, navigate rust src folder , run:

git checkout *your commit-hash*

finally compile with:

rustc -o --target=arm-unknown-linux-gnueabihf rust/src/libstd/lib.rs

this should compile library current working directory.

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