| Issue |
121004
|
| Summary |
-Wglobal-constructors is silenced for derived classes with a virtual base destructor in c++2b mode
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
apache-hb
|
When a class that contains a non trivial member inherits from a pure virtual base class that has an explicitly declared virtual destructor in c++2b mode -Wglobal-constructors is not raised, but an entry is still added to the .init_array to initialize the objects vtable before main. This behaviour is not present in c++20 mode. The entry is only added at -O0, at -O2 and higher `__cxx_global_var_init` is elided and the vtable is placed directly in the data section which makes this very hard to track down.
Godbolt reproducer link: https://godbolt.org/z/W355314dK
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