vscode problem matcher issues when using WSL to build on cmd.exe

I am writing code in WSL using a remote session and then building on cmd.exe. The build process works fine but I cannot get the problem matcher to link to the correct files.

I change my cwd

"options": {"cwd": "/mnt/c/Freescale/CW MCU v10.6.4/eclipse"  },

Below is my build cmd

"cmd.exe /c ecd.exe build -data $WORKSPACE_LOC -project $PROJECT_LOC"

Problem matcher looks like

"problemMatcher": {"base": "$gcc",  }

Any suggestions on how to solve this. I have tried using relative and absolute paths.