+ cargo build --target /home/milili.tech/BL602/bl_iot_sdk/customer_app/sdk_app_rust_gpio/riscv32imacf-unknown-none-elf.json -Z build-std=core
error: failed to run `rustc` to learn about target-specific information
Caused by:
process didn't exit successfully: `rustc - --crate-name ___ --print=file-names --target /home/milili.tech/BL602/bl_iot_sdk/customer_app/sdk_app_rust_gpio/riscv32imacf-unknown-none-elf.json --crate-type bin --crate-type rlib --crate-type dylib --crate-type cdylib --crate-type staticlib --crate-type proc-macro --print=sysroot --print=cfg` (exit status: 1)
--- stderr
error: Error loading target specification: may not set is_builtin for targets not built-in. Run `rustc --print target-list` for a list of built-in targets
If you have time, please check about this.