| Issue |
174064
|
| Summary |
[C++20] [Modules] Not properly mangling for entities in named modules for MSVC ABI
|
| Labels |
help wanted,
clang:modules,
ABI,
platform:windows
|
| Assignees |
|
| Reporter |
ChuanqiXu9
|
Reproducer: https://godbolt.org/z/5oaM6Yjv5
for
```C++
export module a;
export int func() {
return 43;
}
```
Clang in Windows ABI generates:
```
"?func@@YAHXZ"
```
but MSVC generates:
```
?func@@YAHXZ::<!a>
```
This is a compatibility problem. And also this is a correctness problem. Since the design of C++20 Named Modules ask toolchains to treat the entity in different named modules as different entity at link time even they have the same name. So this is a missing feature at ABI level.
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