[flang-commits] [flang] [flang] Set common linkage to common block with zero initializer (PR #179548)

[Valentin Clement バレンタイン クレメン via flang-commits]

clementval wrote:

alternatively, we might be able to detect this during lowering but I didn't find anything to get that information in the expr. 

https://github.com/llvm/llvm-project/pull/179548