sunfish added inline comments.
================
Comment at: clang/lib/CodeGen/CodeGenModule.cpp:6360
+ auto *GA = llvm::GlobalAlias::create("__main_void", F);
+ GA->setVisibility(F->getVisibility());
+ }
----------------
sbc100 wrote:
> sunfish wrote:
> > Can this use `GA->setVisibility(GlobalValue::HiddenVisibility)`?
> > `__main_void` is an implementation detail, so in theory users shouldn't be
> > setting interesting visibility attributes on it.
> The caller main / __main_void could live in different shared library the main
> function itself.
>
> IIRC the caller of `main` is normally something like crt1.o and it should be
> able to see `__main_void` if, and only if, it can see `main`. i.e. if should
> have the same visibility as main itself, no?
Typically crt1.o is linked into the same exe/dso as `main`, so it needs `main`
to have external linkage, but it doesn't need `main` to have any particular
visibility.
In Emscripten, is `main` being called from a different dso, or from JS
following visibility rules for different dsos?
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D75277/new/
https://reviews.llvm.org/D75277
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