I think adjusting LD_LIBRARY_PATH won't help here, as the problem rather seems to be that .../Low.so isn't even linked against the Prolog library libswipl.so in the first place (which then of course leads to the "undefined symbol: PL_open_foreign_frame" error).

The link command does add a link-time library search path for swi-prolog 

cc  -shared -O2 -g -L/usr/local/lib -fstack-protector Low.o callba
+ck.o callperl.o hook.o perl2swi.o swi2perl.o plconfig.o argv.o query.
+o vars.o context.o engines.o o
+paque.o  -o ../blib/arch/auto/Language/Prolog/Yaswi/Low/Low.so  \
           -lgmp -lrt -lreadline -lncurses -lm -lrt -ldl -L/usr/lib/sw
+i-prolog/lib/i386/
                                                         ^^^^^^^^^^^^^
+^^^^^^^^^^^^^^^^^^

[download]

but the actual link instruction -lswipl, which should follow it, is missing...   even though the library is listed as "PLLIB: -lswipl" in the SWI-Prolog configuration check.

The message "No library found for -lpl" suggests that it's looking for libpl.so instead of libswipl.so.

In reply to Re^2: What's happened to Yaswi? by Eliya
in thread What's happened to Yaswi? by Steve_BZ

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