Use nix gnu toolchain format for baremetal apps #53

fsagbuya · 2024-03-25T15:28:58+08:00

fsagbuya commented

2024-03-25 15:28:58 +08:00

Description

Use the nix format for gnu toolchain for arm cross-compilation.

fsbl is dependent on newlib to compile, which is difficult to emulate using glibc from the linux gnu toolchain. Additionally, arm has separate toolchain for bare-metal and linux targets.

Proposing to use at most 2 gnu toolchain, one for bare-metal application (i.e. fsbl, using newlib) and one for linux development (using glibc).

Related issue: #1

Build log:

nix build .#packages.armv7l-linux.fast-servo-fsbl -L --show-trace && ls -lh
Ls ./result/
total 528K
528K -r-xr-xr-x 2 root root 525K Jan  1  1970 fsbl.elf

### Description Use the nix format for gnu toolchain for arm cross-compilation. `fsbl` is dependent on `newlib` to compile, which is [difficult to emulate using glibc](https://stackoverflow.com/questions/61132960/does-glibc-work-on-bare-metal-or-rtos-platforms) from the linux gnu toolchain. Additionally, arm has separate toolchain [for bare-metal and linux targets](https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads). Proposing to use at most 2 gnu toolchain, one for bare-metal application (i.e. fsbl, using newlib) and one for linux development (using glibc). Related issue: #1 Build log: ``` nix build .#packages.armv7l-linux.fast-servo-fsbl -L --show-trace && ls -lh Ls ./result/ total 528K 528K -r-xr-xr-x 2 root root 525K Jan 1 1970 fsbl.elf ```

fsagbuya added 1 commit 2024-03-25 15:28:58 +08:00

use nix gnu toolchain format for baremetal apps 0d3f87c5bc

sb10q commented

2024-03-25 16:12:03 +08:00

Okay. Looks good - at least this code does. Can you send a similar PR in zynq-rs as well?

sb10q merged commit 0d3f87c5bc into master

2024-03-25 16:12:20 +08:00

fsagbuya commented

2024-03-25 16:20:52 +08:00

Okay. Looks good - at least this code does. Can you send a similar PR in zynq-rs as well?

Will do.

> Okay. Looks good - at least this code does. Can you send a similar PR in zynq-rs as well? Will do.

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Reference: M-Labs/nix-servo#53