[PATCH] D136202: [Arm64EC] Refer to dllimport'ed functions correctly.

[chenglin.bi via Phabricator via llvm-commits]

bcl5980 added a comment.

In D136202#3870113 <https://reviews.llvm.org/D136202#3870113>, @efriedma wrote:

> The way you're describing the issue doesn't make sense.  Both `__imp_` and `__imp_aux_` are "magic" prefixes; they only exist in object files, not linked products (dll/exe).

The `__imp_` prefix symbol also exist in lib files. Link.exe use the lib file as input to link dll.

> That said, if you link an arm64ec binary against an x64 library, link.exe does in fact appear to fail to resolve `__imp_aux_fn` unless `__imp_fn` is also in the symbol table.  Note this only applies to linking against x64 libraries; linking against arm64ec libraries works fine (which is why I didn't run into issues when I was testing this).  The fact that the behavior depends on how the library is compiled is so inexplicably weird that I have to call it a bug... but Microsoft probably isn't going to help us here, so we probably need to come up with a workaround.

Yeah, that is exactly what I find, ARM64EC binary link a x64 library has this issue.


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  https://reviews.llvm.org/D136202/new/

https://reviews.llvm.org/D136202