This is the GNU Objective-C compiler, which compiles Objective-C on platforms supported by the gcc compiler. It uses the gcc backend to generate optimized code.

Polymorphic Types are opaque data types that are designed as generic containers of data that can be safely passed around between blocks and threads in GNU Radio. Part of the main gnuradio build.

Protocol Data Units library provides signal processing blocks that operate on Protocol Data Unit format messages. Many such blocks are analogs of streaming API functionality. Part of the main gnuradio build.

This is the GNU Objective-C compiler, which compiles Objective-C on platforms supported by the gcc compiler. It uses the gcc backend to generate optimized code.

ActiveSupport Kernel Reporting Detritus with a few enhancements. Extraction of some parts of ActiveSupport's Kernel Reporting Core Extensions around silencing IO streams.

Cryptographic random bit generators (RBGs), also known as random number generators (RNGs), require a noise source that produces digital outputs with some level of unpredictability, expressed as min-entropy. SP 800-90B provides a standardized means of estimating the quality of a source of entropy.