compileCommands overwrite defines in c_cpp_properties.json?

[mkitby]

Hi,

There are some internal preprocessors in cross-compiling compiler, and these preprocessors are not present in compile_commands.json. I defined these in defines field in c_cpp_properties.json. But it cannot work. Then I found this,

If compileCommands has a valid value and the file open in the editor is in the database, use the compile command in the database entry to determine the include path and defines.

why overwrite defines? how to avoid this?

[sean-mcmanus]

You can merge your additional defines with the ones fro the compileCommands provider by setting the "mergeConfigurations" property to true. See the implementation at #8174 .

[mkitby]

It still does not work when configure "C_Cpp.default.mergeConfigurations": true, TI_ARM is still not defined

{
    "configurations": [
        {
            "name": "TI-CGT-ARM",
            "includePath": ["${workspaceFolder}/**"],
            "defines": ["__TI_ARM__"],
            "compilerPath": "",
            "cStandard": "c11",
            "cppStandard": "c++17",
            "intelliSenseMode": "gcc-arm",
            "compileCommands": "${workspaceFolder}/Output/compile_commands.json"
        }
    ],
    "version": 4
}

[sean-mcmanus]

Oops, sorry -- the "mergeConfigurations" is only supported with a configurationProvider and support for compileCommands is being tracked by #6909 .