And, there is a crossgen.exe which is “Microsoft Common Language Runtime native cross compiler”, version 4.0.50622.1 built by: CLR_TRITON

Usage:

Microsoft (R) CoreCLR Native Image / MDIL Generator - Version 4.0.50622.1
Copyright (c) Microsoft Corporation.  All rights reserved.

Usage: crossgen [args] <assembly name>

    /? or /help          - Display this screen
    /nologo              - Prevents displaying the logo
    @reponse.rsp         - Process command line arguments from specified response file
    /fulltrust           - Assembly will be run in a full trust domain.
    /in <file>           - Specifies input filename (optional)
    /out <file>          - Specifies output filename (optional with native images,
                           required with MDIL)
    /MissingDependenciesOK - Specifies that crossgen should attempt not to fail if a dependency is missing.
    /Trusted_Platform_Assemblies <path[;path]>
                         - List of assemblies treated as trusted platform
    /Platform_Resource_Roots <path[;path]>
                         - List of paths containing localized assembly directories
    /App_Paths <path>    - List of paths containing user-application assemblies and resources
    /App_Ni_Paths <path[;path]>
                         - List of paths containing user-application native images
                         - Must be used with /CreatePDB switch
    /Platform_Winmd_Paths
                         - List of paths containing target platform WinMDs used for emulating
                           RoResolveNamespace
 Compatability Modes
    /PreWP8App           - Set the Windows Phone 8 "Quirks" mode, namely AppDomainCompatSwitch=
                           WindowsPhone_3.7.0.0 or WindowsPhone_3.8.0.0.
 MDIL Generation Parameters
    /mdil           - Generate MDIL rather than native code. Requires presence of /out switch.
    /nomdil         - create MDIL image with no MDIL code or CTL data structures, use to force
                      fall back to JIT
    /EmbedMDIL      - Embed a previously created mdil data in IL image into native image.
    /fxmdil         - Generate framework assembly MDIL images containing minimal MDIL
 Debugging Parameters
    /CreatePDB <Dir to store PDB> [/lines [<search path for managed PDB>] ]
        When specifying /CreatePDB, the native image should be created
        first, and <assembly name> should be the path to the NI.