Compiler support, or helper, functions specific to RVCT are typically used when the compiler cannot easily produce a suitable code sequence itself.

In RVCT v4.0 and later, the helper functions are generated by the compiler in the resulting object files.

In RVCT v3.1 and earlier, the helper functions reside in libraries. Because these libraries are specific to the ARM C compiler, they are intended to be redistributed as necessary with your own code. For example, if you are distributing a library to a third party, they might also require the appropriate helper library to link their final application successfully. For more information about the redistribution rights of the libraries, see your End User License Agreement.