tree 69e22af2b53561b5dd4c9a5082c2255bb0977c86
parent 9f63b831a2f2595b6140df263aa151834bde3e4e
author Jiacheng Lu <lujc@pigweed.infra.roller.google.com> 1722485537 +0000
committer CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com> 1722485537 +0000

roll: third_party/pigweed: pw_toolchain: Rustc cross compile to qemu-clang

Original-Bug: 343111481

Support rustc GN toolchain cross compile to cortex-m3 targets. Cross
compiling requires specifying target triple and target specific linker
flags. Both triple and linker flags are propagated using rustflags
defined in config.

Adding more supported targets requires walking through related config
declaration in pigweed codebase which defines linker flags and target
triple, and populating corresponding rustflags.

This change has been validated by building and running
pw_rust/examples/basic_executable:hello on lm3s6965evb_qemu target.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/211994
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https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 2bccf25ed3d181d..ddcc251bcac0c2c
Roller-URL: https://ci.chromium.org/b/8740837375174405809
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I154bebda2fd682564fbebd88561c03be30d48da5
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/226859
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