Consequences
The library(pce) provides graphics to SWI-Prolog. It isn't needed to run
Prolog, but you need it for:
- Almost all development tools: editor, source navigator,
cross-referencer, profiler, graphical debugger, etc.
- The SPARQL implementation of ClioPatria uses it for regular
expressions in SPARQL.
Solutions
- Linux packages
-
Quite a few Linux packages for SWI-Prolog have a separate package
for xpce because it requires X11. For example:
- Sources on Unix systems
-
Often the jpeg or Xpm development libraries are missing. See
here.
- MacOS
-
On the Mac, the latest version of XQuartz is generally required.
See https://xquartz.macosforge.org/landing/ If you build from
source, make sure you have libjpeg and libXpm.
- Windows
-
There are no known problems on this platform wrt. library(pce).
