https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124187
Bug ID: 124187
Summary: No diagnostic for conflicting array types when
preceded by extern declaration
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: katzdm at gmail dot com
Target Milestone: ---
Consider the program
```cpp
extern int arr[]; // #1
int h() {
extern int arr[2];
return arr[1];
}
int arr[1];
```
GCC diagnoses when this program is either
- compiled in C mode or
- compiled in C++ code with #1 commented,
but does not diagnose when compiled in C++ mode as-is. I assume this should be
diagnosed (despite MSVC also accepting).
