clang build fails with "invalid version 'softfloat'" on aarch64-unknown-none-softfloat target with cc crate 1.2.17 #1441
Description
When building a Rust project that uses the cc crate (version 1.2.17) for the aarch64-unknown-none-softfloat target, the build fails if clang is used as the C compiler.
The error message from clang is:
clang: error: version 'softfloat' in target triple 'aarch64-unknown-none-softfloat' is invalid
The cc crate appears to be invoking clang with the full target triple --target=aarch64-unknown-none-softfloat. It seems that some versions of clang do not accept the softfloat version string within the target triple for this architecture.
Steps to Reproduce (based on our experience):
Use a build.rs script that utilizes the cc crate (version 1.2.17).
Set the build target to aarch64-unknown-none-softfloat (either through environment variables like TARGET or by calling build.target() in the build script).
Ensure clang is selected as the C compiler (e.g., env::set_var("CC", "clang"); in build.rs or via environment variable).
Run cargo build --target aarch64-unknown-none-softfloat.