os module uses wrong path separator in nimvm when cross-compiling

[nocturn9x]

Description

The VM used for compile time evaluation does not appear to be using hostOS to pick which path style to use in functions like joinPath() (possibly targetOS is being used?). This is a problem I encountered while trying to cross compile my project for Windows while being on Linux: part of the code tries to statically read the contents of two JSON files into two consts and fails because the path is incorrect

import os


func buildPath: string {.compileTime.} =
    result = joinPath(currentSourcePath().parentDir(), "resources")

const x = buildPath()
echo x

Nim Version

Nim Compiler Version 2.0.4 [Linux: amd64]
Compiled at 2024-03-28
Copyright (c) 2006-2023 by Andreas Rumpf

git hash: b47747d
active boot switches: -d:release

Current Output

\home\nocturn9x\heimdall\resources

Expected Output

/home/nocturn9x/heimdall/resources

Possible Solution

The nim compile time evaluator should use hostOS for picking the path separator to use

Additional Information

No response

[demotomohiro]

Related issues:
#21534
#19558

A path created at compile time can be used at both compile time and run time.
I have created new path library to workaround this issue: https://github.com/demotomohiro/pathX

[juancarlospaco]

Add a mention to the lib in the docs? 🤔