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TL;DR thanks to rust-lang/rust#45031 we no longer need this Now with -C panic=abort all functions are marked with the `nouwind` attribute in LLVM-IR. With this change LLVM won't generate undefined references to `__aeabi_unwind_cpp_pr0` et al. which we don't use / supply but are required by the AEABI standard in the case that a function that throw exceptions exists (semantically, we never have any of those function with panic=abort but the LLVM-IR didn't reflect this before).
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I think enough time has passed by now so let's merge this. (It's not like I totally forgot about this PR 😅) |
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May 1, 2021
41: Bumped linked_list_allocator and added `const_mut_refs` feature r=jonas-schievink a=Spadi0 Fixes rust-embedded#40 Co-authored-by: Sam Jones <email@spad.io>
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TL;DR thanks to rust-lang/rust#45031 we no longer need this
Now with -C panic=abort all functions are marked with the
nouwindattribute inLLVM-IR. With this change LLVM won't generate undefined references to
__aeabi_unwind_cpp_pr0et al. which we don't use / supply but are required bythe AEABI standard in the case that a function that throw exceptions
exists (semantically, we never have any of those function with panic=abort but
the LLVM-IR didn't reflect this before).
the downside of this change is that users will need a recent-ish (1 week old or
newer) nightly or will run into linker errors.
So I'll wait a bit before merging this, I think.