Importing modules under DUB on Windows

[DLearner]

On Friday, 28 October 2022 at 11:35:44 UTC, Adam D Ruppe wrote:
> On Wednesday, 26 October 2022 at 16:20:01 UTC, DLearner wrote:
>> Wanted to use a function stored in a module outside the main 
>> source.
>
> easiest thing to do with dub is to add it as a sourcePath or a 
> sourceFile. Well, actually, easiest is to just copy the module 
> right into your default src folder, but second easiest is to 
> add the other thing as the sourcePath/sourceFile.
>
> Messing with lib compiles and import paths rarely worth the 
> hassle.
>
> (and without dub btw you can make a generic lib directory, add 
> it to your -I path, then just `dmd -I/path/to/libs -i 
> yourmainfile.d` and it automatically picks up things from 
> import paths. that's how i do it myself)
>
>
> Also later i see you are using the arsd terminal.d, which you 
> can also use through dub's dependency system by adding 
> `arsd-official:terminal` to its list.

Hi

To avoid confusion:

I wanted to use (yours I think!) arsd-official:terminal, and a 
(near-trivial) function (call it NTF) held inside one of my own 
modules (call it OM), itself inside my utilities directory (call 
it UD).
`
	"dependencies": {
		"arsd-official:terminal": "~>10.9.4"
	},
`
was set in the JSON file.
When I copied OM to the package 'source' directory, `dub run` 
executed, nothing blew up, and the whole thing went as expected.

However, going forward, I don't want copies of OM anywhere other 
than UD.
Doing that potentially leaves similar but non-identical copies of 
software around, causing problems at a later stage.

So I delected OM from the 'source' directory, and (following 
suggestions given earlier) reviewed my calculation of the 
_relative_ path from the package directory to UD, and put the 
result into `sourcePaths`.
`dub run` then seemed to find OM and the NTF inside it, as got 
through compile to:
`Target is a library. Skipping execution.`

Google then gave the suggestion:
`"targetType": "executable",`

Took suggestion, dub run then produced:
`Linking...
lld-link: error: subsystem must be defined
Error: linker exited with status 1`

Any further suggestions gratefully received.

Comments:
I am conscious that when OM was in the 'source' directory (with 
app), everything 'just worked'.
Therefore, to me, if OM is somewhere else, but I provide that 
location to dub, everything should work exactly as before.
But that does not happen.
I also thought it strange that I had to provide the UD location 
as a relative rather than absolute path.

Best regards