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The following examples show how to start Prolog debugging when SICStus is run from within Java via Jasper. The examples assume that the SICStus files are part of a development system installation.
The first example initializes the SICStus system property
SP_USE_DEVSYS
by setting the environment variable with the same
name. This method of passing SICStus system properties also works well
when SICStus is embedded in some other, non-Java, program.
$ SP=/usr/local/sicstus4.9.0
$ SP_USE_DEVSYS=yes
$ export SP_USE_DEVSYS
$ java -jar \
"$SP/lib/sicstus-4.9.0/bin/jasper.jar"
Trying to load SICStus.
% The debugger will first creep -- showing everything (trace)
1 1 Call: write('If you see this message, you have successfully') ? RET
If you see this message, then you have successfully
1 1 Exit: write('If you see this message, you have successfully') ? n
initialized the SICStus Prolog engine.
$ unset SP_USE_DEVSYS
The second example initializes the SICStus system property
SP_USE_DEVSYS
by setting the Java system property
se.sics.sicstus.property.SP_USE_DEVSYS
. This method of passing
SICStus system properties is specific to Jasper.
$ SP='/usr/local/sicstus4.9.0' $ java -Dse.sics.sicstus.property.SP_USE_DEVSYS=yes \ -jar "$SP/lib/sicstus-4.9.0/bin/jasper.jar" Trying to load SICStus. % The debugger will first creep -- showing everything (trace) 1 1 Call: write('If you see this message, you have successfully') ? n If you see this message, then you have successfully initialized the SICStus Prolog engine. $