Function build

pub fn build(
    build_type: BuildType,
    target_env: TargetEnv,
    targets: HashSet<Platform>,
    llvm_projects: HashSet<LLVMProject>,
    enable_rtti: bool,
    default_target: Option<TargetTriple>,
    enable_tests: bool,
    enable_coverage: bool,
    extra_args: Vec<String>,
    ccache_variant: Option<CcacheVariant>,
    enable_assertions: bool,
    sanitizer: Option<Sanitizer>,
    enable_valgrind: bool,
    valgrind_options: Vec<String>,
) -> Result<()>

Executes the building of the LLVM framework for the platform determined by the cfg macro. Since cfg is evaluated at compile time, overriding the platform with a command-line argument is not possible. So for cross-platform testing, comment out all but the line to be tested, and perhaps also checks in the platform-specific build method.