pli: pli (Iron Spring PL/I Compiler for Linux) pli: pli: pli is a compiler for the PL/I programming language, which implements pli: most of the "PL/I General-Purpose Subset" (aka "Subset G"). The pli: compiler itself is closed-source, but it may be used and copied pli: freely. The runtime library (libprf.a) is released under the GNU LGPL, pli: so that programs linked with it can be distributed freely. pli: pli: pli: pli: