be35d37d8b
Currently we whether or not to build and test `f16` and `f128` support
mostly based on the target triple. This isn't always accurate, however,
since support also varies by backend and the backend version.
Since recently, `rustc` is aware of this with the unstable config option
`target_has_reliable_{f16,f128}`, which better represents when the types
are actually expected to be available and usable. Switch our
compiler-builtins and libm configuration to use this by probing `rustc`
for the target's settings.
A few small `cfg` fixes are needed with this.
libm
A Rust implementations of the C math library.
Usage
libm provides fallback implementations for Rust's float math functions in
core, and the core_float_math feature. If what is available suits your
needs, there is no need to add libm as a dependency.
If more functionality is needed, this crate can also be used directly:
[dependencies]
libm = "0.2.11"
Contributing
Please check CONTRIBUTING.md
Minimum Rust version policy
This crate supports rustc 1.63 and newer.
License
Usage is under the MIT license, available at https://opensource.org/license/mit.
Contribution
Contributions are licensed under both the MIT license and the Apache License, Version 2.0, available at https://www.apache.org/licenses/LICENSE-2.0. Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as mentioned, without any additional terms or conditions.
See LICENSE.txt for full details.