[$] Truly portable C applications

Programming language polyglots are files that are validprograms in multiple languages, and do different things in each. While polyglots are normallynothing more than a curiosity, theCosmopolitan Libc project has been tryingto put them to a novel use: producing native, multi-platform binaries thatrun directly on several operating systems and architectures. There are stillsome rough edges with the project's approach, but it is generally possible tobuild C programs into a polyglot format with with minimaltweaking.