Hi,
The Clang engine is designed to only work with VisualGDB projects, so the easiest workaround would be to create a new project configuration that will be recognized as a VisualGDB-based configuration. Please try importing your project into another GNU Make-based project (not MSBuild-based) and check the VS project properties. The configuration type will be set to “Makefile” and the “NMake Output” will point to a .vgdbsettings file containing various project-specific settings. Please copy that file to your main project directory and create another Makefile configuration using the VS configuration manager. Ensure its output points to the .vgdbsettings file, the include directories are correct and the “forced include files” contain the gcc_<config>.h file with built-in macros dumped from gcc.
As long as these criteria are met, the Clang IntelliSense will recognize this configuration as a VisualGDB-based configuration and will handle the project as usual.