10. Armv7E-M bare-metal (soft-float) (coming soon)¶

Note

Currently the baseline target is qualified, without any specific -Ctarget-cpu or -Ctarget-feature flags mentioned in the rustc book.

Please contact support if your use case demands fully optimized builds for a specific CPU configuration.

The thumbv7em-none-eabi Ferrocene target provides support for bare-metal ARMv7E-M processors with the T32 ISA, using the soft-float ABI.

On this target, functions accepting f32 or f64 will have those arguments packed into integer registers. For more information on the differences between the hard-float and soft-float ABIs, see the rustc book.

For the hard-float ABI, Armv7E-M bare-metal (hard-float) (coming soon) is also available.

10.1. Prerequisites¶

This target has no pre-requisites.

10.2. Archives to install¶

The following archives are needed when installing this target as a cross-compilation target:

rust-std-thumbv7em-none-eabi

10.3. Required compiler flags¶

To use the target, the following additional flags must be provided to rustc:

--target=thumbv7em-none-eabi