build test binary with cargo rustc

[danburkert]

It's currently not possible to package a test binary using cargo rustc, which can be useful when cross compiling a test binary.

[alexcrichton]

Does passing --test to rustc work?

[danburkert]

No, or at least I don't think so. --test takes a test target, but I don't know how to specify the target as the libraries in-source tests.

[alexcrichton]

Ah I meant along the lines of:

cargo rustc --lib -- --test

(e.g. passing --test to rustc, not cargo)

[danburkert]

I tried that, but it fails at that point to link dev dependencies. Perhaps
there's a workaround to force cargo to link in the dev dependencies with
cargo rustc?

On Fri, Nov 6, 2015 at 11:35 AM, Alex Crichton notifications@github.com
wrote:

Ah I meant along the lines of:

cargo rustc --lib -- --test

(e.g. passing --test to rustc, not cargo)

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[alexcrichton]

Ah, right yes of course! Currently there's no way to work around that, but I have also wanted this in the past!