Feature request: Export unix signals
Since the numerical value of a signal depends on the version of the posix standard and is thus different on different operating systems (e.g. SIGCONT is 19 on macOS but 18 on Linux (it might even be more complicated than that)), it's nice to be able to query the lisp compiler/interpreter for the number behind a name.
Allegro CL, Clozure CL, CMU CL, ECL, and SBCL each provide such a mechanism (through constants, functions, or through a direct FFI reader macro). It would be nice if so did MKCL.