| Issue |
162846
|
| Summary |
feature: Per-module -fmodules-decluse (-fmodules-decluse=<module_name>)
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
torarnv
|
I’m setting up Clang module maps for Qt and thought I’d use -fmodules-decluse to test my work. Unfortunately, enabling -fmodules-decluse results in quite a few errors of this kind:
```
While building module '_DarwinFoundation2' imported from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/stdio.h:61:
In file included from <module-includes>:1:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/nl_types.h:44:10: error: module _DarwinFoundation2 does not directly depend on a module exporting 'sys/cdefs.h', which is part of indirectly-used module cdefs
44 | #include <sys/cdefs.h>
| ^
```
Which doesn't seem possible to work around.
As suggesteded in https://discourse.llvm.org/t/fmodules-decluse-resulting-in-errors-from-xcode-sdk/88267 a `-fmodules-decluse=<module_name>` might be a useful addition to the modules machinery.
Thanks!
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