On Wednesday, 19 April 2023 at 10:21:22 UTC, DLearner wrote:
C source ex01.c:
```
#include <stdio.h>
int main()
{
printf("hello world\n");
return 0;
}
```
'dmc ex01.c' produces message:
```
link ex01,,,user32+kernel32/noi;
```
but does generate .obj, .map and .exe files,
and the exe executes properly.
However, trying to use ImportC via 'dmd ex01.c' produces
messages:
```
failed launching cl.exe /P /Zc:preprocessor /PD /nologo ex01.c
/FIC:\D\dmd2\windows\bin64\..\..\src\druntime\import\importc.h
/Fiex01.i
Error: C preprocess command cl.exe failed for file ex01.c, exit
status 1
```
This behaviour was repeated after a complete fresh
re-installation of dmd & dmc from the website.
Did you use the switch `-m32omf`?
https://dlang.org/spec/importc.html#auto-cpp
