[Issue 24444] ImportC: no way to specify where header files "live"

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24444

Dennis <dkorpel at live.nl> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dkorpel at live.nl
           Hardware|x86_64                      |All
                 OS|Linux                       |All

--- Comment #1 from Dennis <dkorpel at live.nl> ---
There is the `-P=<preprocessorflag>` option:

```
dmd -P-I/usr/include/python3.11
```

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