Compiling to an output file with the same name as a native function hits LLVM assert

[brson]

Compile the following with rustc unsupervise.rs -o unsupervise

native mod rustrt {
    fn unsupervise();
}

fn main() { }

rustc: /home/brian/Dev/rust/src/llvm/lib/MC/MCAssembler.cpp:132: uint64_t llvm::MCAsmLayout::getSymbolOffset(const llvm::MCSymbolData*) const: Assertion `SD->getFragment() && "Invalid getOffset() on undefined symbol!"' failed.
Stack dump:
0.      Running pass 'Function Pass Manager' on module 'unsupervise'.
Aborted

Only happens on Linux (Ubuntu 10.10 here). Thanks araujo.

[lht]

This is most likely a bug in LLVM MC. It only happens on Linux because currently MCStreamer::EmitFileDirective is only implemented by MCELFStreamer, neither by MCMachOStreamer nor MCWinCOFFStreamer.

I will try investigate more and report to upstream.

[lht]

Okay, apparently only ELF supports the ".file" directive, that's why this only effects Linux.

I think a sensible fix is adding ".rc" to module identifiers generated by Rust, because function names could not have a "dot" in their names.

[brson]

Can you add a comment explaining why you're adding the .rc? This will be not at all obvious to the next person who sees it.

[lht]

How about 5318098? Better? :-)

[lht]

Oh, you meant comment, not commit msg. Will update.

[brson]

Thanks. Merged.