Just trying ImportC under Windows 10:

#include <stdio.h>

int main()
{
   printf("Hello world.\n");
   return 0;
}

Produces

dmd hello.c
failed launching cl.exe /P /Zc:preprocessor /PD /nologo hello.c /FIC:\D\dmd2\windows\bin64\..\..\src\druntime\import\importc.h /Fihello.i
Error: C preprocess command cl.exe failed for file hello.c, exit status 1

Any ideas?

Best regards

On Tuesday, 29 October 2024 at 00:10:17 UTC, Richard (Rikki) Andrew Cattermole wrote:

Thank you.
I installed Visual Studio 2022, proved the existence of cl.exe, and added the location to the search path.

However, there is still a problem:

dmd hello.c
C:\D\dmd2\windows\bin64\..\..\src\druntime\import\importc.h(134): fatal error C1034: sal.h: no include path set
Error: C preprocess command cl.exe failed for file hello.c, exit status 2

which looks like dmd found cl.exe, but did not supply it with all the data it required.

On Tuesday, 29 October 2024 at 12:23:06 UTC, DLearner wrote:

dmd hello.c
C:\D\dmd2\windows\bin64\..\..\src\druntime\import\importc.h(134): fatal error C1034: sal.h: no include path set
Error: C preprocess command cl.exe failed for file hello.c, exit status 2

I don't do much on Windows, so I was having trouble with getting the VS stuff installed correctly. I borrowed this command from the Swift installation guide and everything worked:

winget install --id Microsoft.VisualStudio.2022.Community --exact --force --custom "--add Microsoft.VisualStudio.Component.Windows11SDK.22000 --add Microsoft.VisualStudio.Component.VC.Tools.x86.x64"

On Tuesday, 29 October 2024 at 12:42:49 UTC, Lance Bachmeier wrote:

dmd hello.c
C:\D\dmd2\windows\bin64\..\..\src\druntime\import\importc.h(134): fatal error C1034: sal.h: no include path set
Error: C preprocess command cl.exe failed for file hello.c, exit status 2

winget install --id Microsoft.VisualStudio.2022.Community --exact --force --custom "--add Microsoft.VisualStudio.Component.Windows11SDK.22000 --add Microsoft.VisualStudio.Component.VC.Tools.x86.x64"

Thanks for the idea.
The winget installation completed without issues.
Unfortunately, 'dmd hello.c' produced the same error message as before.

On Tuesday, 29 October 2024 at 15:14:24 UTC, DLearner wrote:

dmd hello.c
C:\D\dmd2\windows\bin64\..\..\src\druntime\import\importc.h(134): fatal error C1034: sal.h: no include path set
Error: C preprocess command cl.exe failed for file hello.c, exit status 2

winget install --id Microsoft.VisualStudio.2022.Community --exact --force --custom "--add Microsoft.VisualStudio.Component.Windows11SDK.22000 --add Microsoft.VisualStudio.Component.VC.Tools.x86.x64"

you need to invoke that command inside this windoze stupid thing:

https://learn.microsoft.com/en-us/visualstudio/ide/reference/command-prompt-powershell?view=vs-2022

On Tuesday, 29 October 2024 at 15:49:13 UTC, ryuukk_ wrote:

dmd hello.c
C:\D\dmd2\windows\bin64\..\..\src\druntime\import\importc.h(134): fatal error C1034: sal.h: no include path set
Error: C preprocess command cl.exe failed for file hello.c, exit status 2

winget install --id Microsoft.VisualStudio.2022.Community --exact --force --custom "--add Microsoft.VisualStudio.Component.Windows11SDK.22000 --add Microsoft.VisualStudio.Component.VC.Tools.x86.x64"

Similar message from Powershell:

PS C:\Users\SoftDev\Documents\BDM\projects\it\c> dmd hello.c
C:\D\dmd2\windows\bin64\..\..\src\druntime\import\importc.h(134): fatal error C1034: sal.h: no include path set
Error: C preprocess command C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.41.34120\bin\HostX64\x64\cl.exe failed for file hello.c, exit status 2

On Tuesday, 29 October 2024 at 16:14:22 UTC, DLearner wrote:

dmd hello.c
C:\D\dmd2\windows\bin64\..\..\src\druntime\import\importc.h(134): fatal error C1034: sal.h: no include path set
Error: C preprocess command cl.exe failed for file hello.c, exit status 2

winget install --id Microsoft.VisualStudio.2022.Community --exact --force --custom "--add Microsoft.VisualStudio.Component.Windows11SDK.22000 --add Microsoft.VisualStudio.Component.VC.Tools.x86.x64"

PS C:\Users\SoftDev\Documents\BDM\projects\it\c> dmd hello.c
C:\D\dmd2\windows\bin64\..\..\src\druntime\import\importc.h(134): fatal error C1034: sal.h: no include path set
Error: C preprocess command C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.41.34120\bin\HostX64\x64\cl.exe failed for file hello.c, exit status 2

It might be a bug so create an issue. It's hard to see how it's not.