Type: LanguageService

Describe the bug

• OS and Version: Linux mint 19.01
• VS Code Version: 1.32.3
• C/C++ Extension Version:0.21
• Other extension: arduino 0.2.25

I can't get the C_Cpp.default.IncludePath get to work. please see details below.

To Reproduce

1. i have followed the instruction in https://github.com/Microsoft/vscode-cpptools/blob/master/Documentation/LanguageServer/Customizing%20Default%20Settings.md
2. my settings.json is

{    "C_Cpp.default.includePath": [
        "${env.HOME}/.arduino"
        ]
}

my c_cpp_properties.json is:

{
    "configurations": [
        {
            "name": "Linux",
            "includePath": [
                "/opt/arduino/arduino-1.8.8/tools/**",
                "/opt/arduino/arduino-1.8.8/hardware/arduino/avr/**",
                "${default}"
            ],
            "forcedInclude": [
                "/opt/arduino/arduino-1.8.8/hardware/arduino/avr/cores/arduino/Arduino.h"
            ],
            "intelliSenseMode": "gcc-x64",
            "compilerPath": "/usr/bin/gcc",
            "cStandard": "c11",
            "cppStandard": "c++17"
        }
    ],
    "version": 4
}

mostly auto generated except ${default}

3. i write in main.ino which use C++ language as follows:

#include <MFRC522.h>

and got a problem Include file not found in browse.path.

4. BUT, when i move the "${env.HOME}/.arduino" to c_cpp_properties.json inside configurations->includePath array, the problem disappears.

Expected behavior

I expect something like global configuration or default configuration in settings.json so i don't have to re-write configuration each new project to c_cpp_properties.json. and my expectation is the same as issue #368 (comment)

Screenshots

this is the current problem:

this is the behavior after i edit the c_cpp_properties.json:

Additional context

-none