dblaikie added a comment.
In D70696#1765637 <https://reviews.llvm.org/D70696#1765637>, @probinson wrote:
> For the case:
>
> cat def.c
> int global_var = 2;
>
>
> def.o should have debug info for the definition of global_var.
> For the case:
>
> cat noref.c
> extern int global_var;
> int main() {}
>
>
> I would not expect to see debug info for the declaration of global_var.
> For the case:
>
> cat ref.c
> extern int global_var;
> int main() { return global_var; }
>
>
> I *do* expect to see debug info for the declaration of global_var.
FWIW I'd only expect it there with -fstandalone-debug - with
-fno-standalone-debug I'd expect this code to rely on the assumption that def.c
is also compiled with debug info.
(as it stands today, Clang/LLVM never produces debug info for global_var in
ref.c, even with -fstandalone-debug & I'm not too fussed about that, but would
be OK if someone wanted to fix/improve that)
> Does bpf require debug info for the declaration of global_var in `noref.c` ?
Yeah, +1, I'm still curious to know more/trying to understand this ^
requirement.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D70696/new/
https://reviews.llvm.org/D70696
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