Feature detection

[kylemayes]

Feature detection

[KyleMayes]

No. There isn't a reliable way to parse clang --version as it differs from platform to platform, so I didn't even try.

However, now that I think about it, there may be a better way. You get linking errors if you attempt to call a clang 3.9 function but have linked to an earlier version of clang, so I might be able to detect the version of clang in use by attempting to compile a program using non-3.5 features in build.rs, I'll look into it soon.

[Yamakaky]

I also think that would be more reliable (it compiles or not ^^).

[KyleMayes]

I've actually gone an implemented this, but now that I've thought about it more I don't think it adds much. You will find out if your version of clang is insufficient when to attempt to use a function that your version of clang does not support by way of a link error. This would cause the failure to be one step earlier, but at the cost of added complexity and the risk of false positives.

[Yamakaky]

That was mostly to add better error messages.