[$] Recent improvements in GCC diagnostics

The primary job of a compiler is to translate source code into a binaryform that can be run by a computer. Increasingly, though, developers wantmore from their tools, compilers included. Since the compiler mustunderstand the code it is being asked to translate, it is in a goodposition to provide information about how that code will execute - andwhere things might go wrong. At the 2023 GNU Tools Cauldron,David Malcolm talked about recent work to improve the diagnostic outputfrom the GCC compiler.