+<sect1> Tools for building parallel GHC (GPH)
+<label id="pre-supposed-gph-tools">
+<p>
+
+<descrip>
+<tag>PVM version 3:</tag>
+<nidx>pre-supposed: PVM3 (Parallel Virtual Machine)</nidx>
+<nidx>PVM3 (Parallel Virtual Machine), pre-supposed</nidx>
+
+PVM is the Parallel Virtual Machine on which Parallel Haskell programs
+run. (You only need this if you plan to run Parallel Haskell.
+Concurent Haskell, which runs concurrent threads on a uniprocessor
+doesn't need it.) Underneath PVM, you can have (for example) a
+network of workstations (slow) or a multiprocessor box (faster).
+
+The current version of PVM is 3.3.11; we use 3.3.7. It is readily
+available on the net; I think I got it from @research.att.com@, in
+@netlib@.
+
+A PVM installation is slightly quirky, but easy to do. Just follow
+the @Readme@ instructions.
+
+<tag>@bash@:</tag>
+<nidx>bash, presupposed (Parallel Haskell only)</nidx>
+Sadly, the @gr2ps@ script, used to convert ``parallelism profiles''
+to PostScript, is written in Bash (GNU's Bourne Again shell).
+This bug will be fixed (someday).
+</descrip>
+