A critical error occurs where GHDL is unable to locate the standard libraries (std and ieee) after a specific installation sequence involving the OSS-CAD-Suite on Windows 11.

The issue appears to be triggered when:

1. OSS-CAD-Suite is installed after GHDL.
2. OR when OSS-CAD-Suite is uninstalled and reinstalled while GHDL is already present.

It seems that the internal path resolution for GHDL is being redirected or broken, looking for library files in a directory that does not exist or has been moved during the OSS-CAD-Suite setup.

Note: This issue likely belongs in the main OneWare repository. However, due to time constraints for deeper debugging, I am documenting it here in OneWare.GHDLExtension first to ensure the bug is tracked.

Error Log

[Test]: ghdl -i --workdir=C:\Users\<USER>\workspaces\OneWare\main\Projects\Test\build -PC:\Users\<USER>\workspaces\OneWare\main\Projects\Test\build --std=93 Test.vhd Test_tb.vhd
C:\Users\<USER>\workspaces\OneWare\main\Packages\NativeTools\ghdl\bin\ghdl.exe:warning: ieee library directory 'C:\Users\<USER>\workspaces\OneWare\main\Packages\NativeTools\osscadsuite\oss-cad-suite\lib\ghdl\ieee\v93\' not found
C:\Users\<USER>\workspaces\OneWare\main\Packages\NativeTools\ghdl\bin\ghdl.exe:error: cannot find "std" library

[Test]: ghdl -m --workdir=C:\Users\<USER>\workspaces\OneWare\main\Projects\Test\build -PC:\Users\<USER>\workspaces\OneWare\main\Projects\Test\build --std=93 Test
C:\Users\<USER>\workspaces\OneWare\main\Packages\NativeTools\ghdl\bin\ghdl.exe:warning: ieee library directory 'C:\Users\<USER>\workspaces\OneWare\main\Packages\NativeTools\osscadsuite\oss-cad-suite\lib\ghdl\ieee\v93\' not found
C:\Users\<USER>\workspaces\OneWare\main\Packages\NativeTools\ghdl\bin\ghdl.exe:error: cannot find "std" library

Steps to Reproduce

1. Have a working OneWare environment with GHDL installed.
2. Install/Reinstall the OSS-CAD-Suite package.
3. Attempt to analyze or synthesize a VHDL project (e.g., using --std=93).
4. GHDL fails with error: cannot find "std" library.

Observations

The warning shows that GHDL is looking for the IEEE library inside the osscadsuite path:
...\NativeTools\osscadsuite\oss-cad-suite\lib\ghdl\ieee\v93\
It appears there is a conflict between the standalone GHDL pathing and the paths expected by the OSS-CAD-Suite version of the tools, leading to a broken environment if the installation order is not "perfect."
According to the OSS-CAd-Suite website, GHDL is not available for Windows, but only for macOS and Linux. An exception will probably have to be made for Windows.