mirror of
https://github.com/rust-lang/rust.git
synced 2026-05-16 21:15:18 +03:00
Trevor Gross
ff6a9800a3
Replace the \01__gnu_mcount_nc to LLVM intrinsic for additional ARM targets This is an extension to #113814 which seems to have missed two targets which also need this patch for instrumentation with `-Z instrument-mcount` to work correctly. For anyone who might stumble over this issue again in the future: As a workaround one can dump the current target configuration using ``` rustc +nightly -Z unstable-options --target armv7-unknown-linux-gnueabihf --print target-spec-json ``` (assuming `armv7-unknown-linux-gnueabihf` is the target to build for) add the line ``` "llvm-mcount-intrinsic": "llvm.arm.gnu.eabi.mcount", ``` and compile with ``` RUSTFLAGS="-Z instrument-mcount -C passes=ee-instrument<post-inline>" cargo +nightly build -Z build-std --target <path to directory with modified target config>/armv7-unknown-linux-gnueabihf.json ``` It might be necessary to set the compiler for cross compiling using something like ``` export TARGET_CC=arm-linux-gnueabihf-gcc ```