dds/tools/gcc-9.jsonc

{
    "$schema": "../res/toolchain-schema.json",
    "compiler_id": "gnu",
    "c_compiler": "gcc-9",
    "cxx_compiler": "g++-9",
    "cxx_version": "c++17",
    "flags": [
        "-DSPDLOG_COMPILED_LIB", // Required to use a compiled spdlog
        "-Werror=return-type"
    ],
    "cxx_flags": [
        "-fconcepts"
    ],
    // "debug": true,
    "optimize": true,
    "compiler_launcher": "ccache"
}