c_cpp_properties.json support for environment variables defined in ~/.bashrc used in "includePath" and "compilerPath"

Feature Request

I have a project compiled with g++. I have two Windows PCs, with one connected to local WSL and the other to a remote server. The path to g++ and the path of a third-party library needed in the includePath are different on the two devices.

So I set different environment variables in .bashrc on both devices:

export GCC_PATH = /path/to/gcc
export MY_LIB_PATH = /path/to/my/lib/

In c_cpp_properties.json, use the following settings:

{
    "configurations": [
        {
            "name": "Linux",
            "includePath": [
                "${workspaceFolder}/**",
                "${env:MY_LIB_PATH}/include"
            ],
            "compilerPath": "${env:GCC_PATH}/bin/g++",
            "cStandard": "gnu23",
            "cppStandard": "c++20",
            "intelliSenseMode": "linux-gcc-x64"
        }
    ],
    "version": 4
}

Then the following problems occured:

1. It seems that intellisense currently doesn't recognize using environment variable in compilerPath. There are squiggles under "${env:GCC_PATH}/bin/g++".

2. Although there are no squiggles under "${env:MY_LIB_PATH}/include" in includePath, the intellisense still can't find the header that needs to be included in the .cpp file. So when I open a .cpp file, squiggles appear.

This should not be due to a flaw in defining environment variables in .bashrc, as this link suggests that VSCode should now auto-detect environment variables in .bashrc.

I noticed and browsed a lot of issues about environment variable support, but still can't find a solution for this problem, so I consider it as a request that may be added.

Reproduce the configuration in c_cpp_properties.json using environment variables from ~/.bashrc in both includePath and compilerPath. Start by checking how IntelliSense resolves these two settings; done means the compilerPath produces no squiggle and headers under the environment-based includePath resolve without diagnostics.