Cannot pass flags to rustc from cargo build.

[xldenis]

I can't seem to pass flags down to rustc when running cargo-build. Specifically the command would be:

/usr/local/lib/cargo/cargo-build --target i686-unknown-linux-gnu --emit=obj --opt-level=3 -Z lto -Z no-landing-pads  --verbose --release
Unknown flag: '--emit'
Usage:
    cargo-build [options]
make: *** [build/x86/main.o] Error 1

[alexchandel]

In particular, from IRC, you're saying that --emit, --opt-level, -Z lto, -Z no-landing-pads, and --release don't work?

[alexcrichton]

Closing as a dupe of #313

[alexcrichton]

#60 that is.