The Cross-OS Development Platform is a C/C++ source-level virtualization technology that allows developers to write applications that can run on multiple operating systems without porting. It provides a common OS interface and virtualizes OS functions so that applications interact with the Cross-OS Development Platform interfaces rather than directly with the OS. This protects applications from being tied to a single OS and simplifies porting to new OSes. The platform includes tools for developing on a host system, generating optimized code for embedded targets, and profiling applications on different OSes.