[llvm-dev] LLD doesn't handle globals with appending linkage (original) (raw)
Fangrui Song via llvm-dev llvm-dev at lists.llvm.org
Tue Feb 18 10🔞33 PST 2020
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On 2020-02-18, Gleb Popov via llvm-dev wrote:
On Tue, Feb 18, 2020 at 9:42 PM David Blaikie <dblaikie at gmail.com> wrote:
I'm /guessing/ this might be related to the COFF support specifically (perhaps COFF has no appending linkage support - in some cases LLVM IR supports the union of all semantics so that different formats can be fully expressed - but it means when targeting certain formats, some features are inherently unusable because they don't map to anything on that platform)
Actually, I experience the same problem with ELF on FreeBSD.
https://llvm.org/docs/LangRef.html
Unfortunately this doesn’t correspond to any feature in .o files, so it can only be used for variables like llvm.globalctors which llvm interprets specially.
I think appending can only be used by llvm.used llvm.compiler.used llvm.global_ctors llvm.global_dtors. How did you end up with an appending in the IR?
(Maybe we can add an verifier because it seems no object format supports it.)
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