| Issue |
89781
|
| Summary |
[C++20] [Modules] Clang does not implement strong ownership model when targeting MSVC ABI
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
huangqinjin
|
#### `hello.cppm`
```c++
export module hello;
export void greeting() {}
```
#### MSVC
```shell
>cl /std:c++20 /TP /interface /c hello.cppm
>dumpbin /symbols hello.obj | findstr greeting
009 00000000 SECT3 notype () External | ?greeting@@YAXXZ::<!hello> (void __cdecl greeting(void))
```
#### Clang MSVC ABI
```shell
>clang --target=x86_64-windows-msvc -std=c++20 -c hello.cppm
>dumpbin /symbols hello.o | findstr greeting
00B 00000000 SECT1 notype () External | ?greeting@@YAXXZ (void __cdecl greeting(void))
```
#### Clang GNU ABI
```shell
>clang --target=x86_64-windows-gnu -std=c++20 -c hello.cppm
>>dumpbin /symbols hello.o | findstr greeting
00D 00000000 SECT1 notype () External | _ZW5hello8greetingv
```
The symbol mangling includes the module name for GNU ABI but not for MSVC ABI.
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