Reject -L "", -L native=, and other empty search paths. #23358
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LLVM_LIBDIR_<triple> is only defined for host triples, not target triples. FWIW, the same is true for LLVM_STDCPP_RUSTFLAGS_<triple>, where we explicitly define it as empty when --enable-llvm-static-stdcpp is not specified, but it's still undefined for cross-compiled triples.
It wasn't clear to me that early_error was correct here, but it seems to
work. This code is reachable from `rustdoc`, which is problematic, because
early_error panics. rustc handles the panics gracefully (without ICEing or
crashing), but rustdoc does not. It's not the first such rustdoc problem,
though:
$ rustdoc hello.rs --extern std=bad-std
error: extern location for std does not exist: bad-std
hello.rs:1:1: 1:1 error: can't find crate for `std`
hello.rs:1
^
error: aborting due to 2 previous errors
thread '<unnamed>' panicked at 'Box<Any>', /home/rustbuild/src/rust-buildbot/slave/nightly-dist-rustc-linux/build/src/libsyntax/diagnostic.rs:151
thread '<unnamed>' panicked at 'called `Result::unwrap()` on an `Err` value: "rustc failed"', /home/rustbuild/src/rust-buildbot/slave/nightly-dist-rustc-linux/build/src/libcore/result.rs:744
thread '<main>' panicked at 'child thread None panicked', /home/rustbuild/src/rust-buildbot/slave/nightly-dist-rustc-linux/build/src/libstd/thread.rs:661
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r? @eddyb (rust_highfive has picked a reviewer for you, use r? to override) |
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Mar 15, 2015
…chton This change closes rust-lang#23303 by rejecting an empty search path.
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This change closes #23303 by rejecting an empty search path.