Steve_BZ has asked for the wisdom of the Perl Monks concerning the following question:

Dear Monks,

What has happened to the wonderful and reliable Yaswi under Kubuntu 11.04?

Here's what happened to my cpan install: 

root@image-Adesktop:~# cpan -i Language::Prolog::Yaswi
CPAN: Storable loaded ok (v2.20)
Going to read '/home/image/.local/share/.cpan/Metadata'
  Database was generated on Wed, 24 Aug 2011 09:27:16 GMT
Running install for module 'Language::Prolog::Yaswi'
CPAN: YAML loaded ok (v0.73)
Running make for S/SA/SALVA/Language-Prolog-Yaswi-0.18.tar.gz
CPAN: Digest::SHA loaded ok (v5.47)
CPAN: Compress::Zlib loaded ok (v2.02)
Checksum for /home/image/.local/share/.cpan/sources/authors/id/S/SA/SA
+LVA/Language-Prolog-Yaswi-0.18.tar.gz ok
CPAN: Archive::Tar loaded ok (v1.52)
Language-Prolog-Yaswi-0.18/
Language-Prolog-Yaswi-0.18/Low/
Language-Prolog-Yaswi-0.18/Low/engines.c
Language-Prolog-Yaswi-0.18/Low/opaque.c
Language-Prolog-Yaswi-0.18/Low/hook.h
Language-Prolog-Yaswi-0.18/Low/query.h
Language-Prolog-Yaswi-0.18/Low/context.c
Language-Prolog-Yaswi-0.18/Low/argv.c
Language-Prolog-Yaswi-0.18/Low/Low.h
Language-Prolog-Yaswi-0.18/Low/vars.h
Language-Prolog-Yaswi-0.18/Low/context.h
Language-Prolog-Yaswi-0.18/Low/opaque.h
Language-Prolog-Yaswi-0.18/Low/vars.c
Language-Prolog-Yaswi-0.18/Low/Low.pm
Language-Prolog-Yaswi-0.18/Low/callperl.h
Language-Prolog-Yaswi-0.18/Low/perl2swi.c
Language-Prolog-Yaswi-0.18/Low/Makefile.PL
Language-Prolog-Yaswi-0.18/Low/hook.c
Language-Prolog-Yaswi-0.18/Low/callback.h
Language-Prolog-Yaswi-0.18/Low/argv.h
Language-Prolog-Yaswi-0.18/Low/plconfig.h
Language-Prolog-Yaswi-0.18/Low/query.c
Language-Prolog-Yaswi-0.18/Low/perl2swi.h
Language-Prolog-Yaswi-0.18/Low/Low.xs
Language-Prolog-Yaswi-0.18/Low/engines.h
Language-Prolog-Yaswi-0.18/Low/callback.c
Language-Prolog-Yaswi-0.18/Low/callperl.c
Language-Prolog-Yaswi-0.18/Low/swi2perl.c
Language-Prolog-Yaswi-0.18/Low/swi2perl.h
Language-Prolog-Yaswi-0.18/Low/ppport.h
Language-Prolog-Yaswi-0.18/Yaswi.pm
Language-Prolog-Yaswi-0.18/Changes
Language-Prolog-Yaswi-0.18/META.yml
Language-Prolog-Yaswi-0.18/README
Language-Prolog-Yaswi-0.18/Makefile.PL
Language-Prolog-Yaswi-0.18/MANIFEST
Language-Prolog-Yaswi-0.18/t/
Language-Prolog-Yaswi-0.18/t/4pods.t
Language-Prolog-Yaswi-0.18/t/3simple.t
Language-Prolog-Yaswi-0.18/t/5opaque.t
Language-Prolog-Yaswi-0.18/t/1Low.t
Language-Prolog-Yaswi-0.18/t/2Yaswi.t
Language-Prolog-Yaswi-0.18/pl.pl
CPAN: File::Temp loaded ok (v0.22)
utf8 "\xF1" does not map to Unicode at /usr/local/share/perl/5.10.1/YA
+ML.pm line 77, <$IN> chunk 1.
utf8 "\xF1" does not map to Unicode at /usr/local/share/perl/5.10.1/YA
+ML.pm line 77, <$IN> chunk 1.

  CPAN.pm: Going to build S/SA/SALVA/Language-Prolog-Yaswi-0.18.tar.gz

Checking if your kit is complete...
Looks good
retrieving SWI-Prolog configuration:
  running 'swipl -dump-runtime-variables'
    PLBASE: /usr/lib/swi-prolog
    PLARCH: i386
    PLLIBS: -lgmp -lrt -lreadline -lncurses -lm -lrt -ldl 
    PLLIB: -lswipl
    PLCFLAGS: -pthread -fPIC
    PLLDFLAGS: -export-dynamic -Wl,-Bsymbolic-functions -pthread 
    PLSOEXT: so
    PLVERSION: 51001
    PLSHARED: yes
    PLTHREADS: yes

checking thread support in Perl and SWI-Prolog:
  thread support enabled

creating plconfig.c
Note (probably harmless): No library found for -lpl
Writing Makefile for Language::Prolog::Yaswi::Low
Writing Makefile for Language::Prolog::Yaswi
utf8 "\xF1" does not map to Unicode at /usr/local/share/perl/5.10.1/YA
+ML.pm line 77, <$IN> chunk 1.
utf8 "\xF1" does not map to Unicode at /usr/local/share/perl/5.10.1/YA
+ML.pm line 77, <$IN> chunk 1.
Could not read '/home/image/.local/share/.cpan/build/Language-Prolog-Y
+aswi-0.18-dEJlkA/META.yml'. Falling back to other methods to determin
+e prerequisites
cp pl.pl blib/lib/Language/Prolog/pl.pl
cp Yaswi.pm blib/lib/Language/Prolog/Yaswi.pm
make[1]: Entering directory `/home/image/.local/share/.cpan/build/Lang
+uage-Prolog-Yaswi-0.18-dEJlkA/Low'
cp Low.pm ../blib/lib/Language/Prolog/Yaswi/Low.pm
/usr/bin/perl /usr/share/perl/5.10.1/ExtUtils/xsubpp  -typemap /usr/sh
+are/perl/5.10/ExtUtils/typemap  Low.xs > Low.xsc && mv Low.xsc Low.c
cc -c  -I. -I/usr/lib/swi-prolog/include -D_REENTRANT -D_GNU_SOURCE -D
+DEBIAN -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/incl
+ude -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -g -O0   -DVERSION=\"0
+.18\" -DXS_VERSION=\"0.18\" -fPIC "-I/usr/lib/perl/5.10/CORE"   Low.c
Low.c: In function ‘XS_Language__Prolog__Yaswi__Low_openquery’:
Low.xs:140:15: warning: ignoring return value of ‘PL_unify_arg’, decla
+red with attribute warn_unused_result
cc -c  -I. -I/usr/lib/swi-prolog/include -D_REENTRANT -D_GNU_SOURCE -D
+DEBIAN -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/incl
+ude -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -g -O0   -DVERSION=\"0
+.18\" -DXS_VERSION=\"0.18\" -fPIC "-I/usr/lib/perl/5.10/CORE"   callb
+ack.c
cc -c  -I. -I/usr/lib/swi-prolog/include -D_REENTRANT -D_GNU_SOURCE -D
+DEBIAN -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/incl
+ude -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -g -O0   -DVERSION=\"0
+.18\" -DXS_VERSION=\"0.18\" -fPIC "-I/usr/lib/perl/5.10/CORE"   callp
+erl.c
callperl.c: In function ‘push_args’:
callperl.c:118:19: warning: ignoring return value of ‘PL_unify_term’, 
+declared with attribute warn_unused_result
callperl.c: In function ‘check_error_and_pop_results’:
callperl.c:76:15: warning: ignoring return value of ‘PL_unify_term’, d
+eclared with attribute warn_unused_result
callperl.c:84:15: warning: ignoring return value of ‘PL_unify_term’, d
+eclared with attribute warn_unused_result
cc -c  -I. -I/usr/lib/swi-prolog/include -D_REENTRANT -D_GNU_SOURCE -D
+DEBIAN -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/incl
+ude -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -g -O0   -DVERSION=\"0
+.18\" -DXS_VERSION=\"0.18\" -fPIC "-I/usr/lib/perl/5.10/CORE"   hook.
+c
cc -c  -I. -I/usr/lib/swi-prolog/include -D_REENTRANT -D_GNU_SOURCE -D
+DEBIAN -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/incl
+ude -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -g -O0   -DVERSION=\"0
+.18\" -DXS_VERSION=\"0.18\" -fPIC "-I/usr/lib/perl/5.10/CORE"   perl2
+swi.c
cc -c  -I. -I/usr/lib/swi-prolog/include -D_REENTRANT -D_GNU_SOURCE -D
+DEBIAN -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/incl
+ude -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -g -O0   -DVERSION=\"0
+.18\" -DXS_VERSION=\"0.18\" -fPIC "-I/usr/lib/perl/5.10/CORE"   swi2p
+erl.c
swi2perl.c: In function ‘raise_atom_expected’:
swi2perl.c:177:18: warning: ignoring return value of ‘PL_unify_term’, 
+declared with attribute warn_unused_result
swi2perl.c: In function ‘swi2perl’:
swi2perl.c:26:13: warning: ignoring return value of ‘PL_get_long’, dec
+lared with attribute warn_unused_result
swi2perl.c:31:14: warning: ignoring return value of ‘PL_get_float’, de
+clared with attribute warn_unused_result
swi2perl.c:53:28: warning: ignoring return value of ‘PL_get_list’, dec
+lared with attribute warn_unused_result
swi2perl.c:70:30: warning: ignoring return value of ‘PL_get_name_arity
+’, declared with attribute warn_unused_result
swi2perl.c:85:31: warning: ignoring return value of ‘PL_get_arg’, decl
+ared with attribute warn_unused_result
cc -c  -I. -I/usr/lib/swi-prolog/include -D_REENTRANT -D_GNU_SOURCE -D
+DEBIAN -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/incl
+ude -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -g -O0   -DVERSION=\"0
+.18\" -DXS_VERSION=\"0.18\" -fPIC "-I/usr/lib/perl/5.10/CORE"   plcon
+fig.c
cc -c  -I. -I/usr/lib/swi-prolog/include -D_REENTRANT -D_GNU_SOURCE -D
+DEBIAN -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/incl
+ude -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -g -O0   -DVERSION=\"0
+.18\" -DXS_VERSION=\"0.18\" -fPIC "-I/usr/lib/perl/5.10/CORE"   argv.
+c
cc -c  -I. -I/usr/lib/swi-prolog/include -D_REENTRANT -D_GNU_SOURCE -D
+DEBIAN -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/incl
+ude -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -g -O0   -DVERSION=\"0
+.18\" -DXS_VERSION=\"0.18\" -fPIC "-I/usr/lib/perl/5.10/CORE"   query
+.c
cc -c  -I. -I/usr/lib/swi-prolog/include -D_REENTRANT -D_GNU_SOURCE -D
+DEBIAN -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/incl
+ude -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -g -O0   -DVERSION=\"0
+.18\" -DXS_VERSION=\"0.18\" -fPIC "-I/usr/lib/perl/5.10/CORE"   vars.
+c
cc -c  -I. -I/usr/lib/swi-prolog/include -D_REENTRANT -D_GNU_SOURCE -D
+DEBIAN -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/incl
+ude -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -g -O0   -DVERSION=\"0
+.18\" -DXS_VERSION=\"0.18\" -fPIC "-I/usr/lib/perl/5.10/CORE"   conte
+xt.c
cc -c  -I. -I/usr/lib/swi-prolog/include -D_REENTRANT -D_GNU_SOURCE -D
+DEBIAN -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/incl
+ude -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -g -O0   -DVERSION=\"0
+.18\" -DXS_VERSION=\"0.18\" -fPIC "-I/usr/lib/perl/5.10/CORE"   engin
+es.c
cc -c  -I. -I/usr/lib/swi-prolog/include -D_REENTRANT -D_GNU_SOURCE -D
+DEBIAN -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/incl
+ude -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -g -O0   -DVERSION=\"0
+.18\" -DXS_VERSION=\"0.18\" -fPIC "-I/usr/lib/perl/5.10/CORE"   opaqu
+e.c
Running Mkbootstrap for Language::Prolog::Yaswi::Low ()
chmod 644 Low.bs
rm -f ../blib/arch/auto/Language/Prolog/Yaswi/Low/Low.so
LD_RUN_PATH="/lib/i386-linux-gnu" cc  -shared -O2 -g -L/usr/local/lib 
+-fstack-protector Low.o callback.o callperl.o hook.o perl2swi.o swi2p
+erl.o plconfig.o argv.o query.o vars.o context.o engines.o opaque.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/        \
          
chmod 755 ../blib/arch/auto/Language/Prolog/Yaswi/Low/Low.so
cp Low.bs ../blib/arch/auto/Language/Prolog/Yaswi/Low/Low.bs
chmod 644 ../blib/arch/auto/Language/Prolog/Yaswi/Low/Low.bs
Manifying ../blib/man3/Language::Prolog::Yaswi::Low.3pm
make[1]: Leaving directory `/home/image/.local/share/.cpan/build/Langu
+age-Prolog-Yaswi-0.18-dEJlkA/Low'
Manifying blib/man3/Language::Prolog::pl.3pm
Manifying blib/man3/Language::Prolog::Yaswi.3pm
  SALVA/Language-Prolog-Yaswi-0.18.tar.gz
  /usr/bin/make -- OK
Running make test
make[1]: Entering directory `/home/image/.local/share/.cpan/build/Lang
+uage-Prolog-Yaswi-0.18-dEJlkA/Low'
make[1]: Leaving directory `/home/image/.local/share/.cpan/build/Langu
+age-Prolog-Yaswi-0.18-dEJlkA/Low'
PERL_DL_NONLAZY=1 /usr/bin/perl "-MExtUtils::Command::MM" "-e" "test_h
+arness(0, 'blib/lib', 'blib/arch')" t/*.t
t/1Low.t ..... 1/1 
#   Failed test 'use Language::Prolog::Yaswi::Low;'
#   at t/1Low.t line 9.
#     Tried to use 'Language::Prolog::Yaswi::Low'.
#     Error:  Can't load '/home/image/.local/share/.cpan/build/Languag
+e-Prolog-Yaswi-0.18-dEJlkA/blib/arch/auto/Language/Prolog/Yaswi/Low/L
+ow.so' for module Language::Prolog::Yaswi::Low: /home/image/.local/sh
+are/.cpan/build/Language-Prolog-Yaswi-0.18-dEJlkA/blib/arch/auto/Lang
+uage/Prolog/Yaswi/Low/Low.so: undefined symbol: PL_open_foreign_frame
+ at /usr/lib/perl/5.10/DynaLoader.pm line 192.
#  at (eval 4) line 2
# Compilation failed in require at (eval 4) line 2.
# BEGIN failed--compilation aborted at (eval 4) line 2.
# Looks like you failed 1 test of 1.
t/1Low.t ..... Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/1 subtests 
t/2Yaswi.t ... 1/1 
#   Failed test 'use Language::Prolog::Yaswi;'
#   at t/2Yaswi.t line 9.
#     Tried to use 'Language::Prolog::Yaswi'.
#     Error:  Can't load '/home/image/.local/share/.cpan/build/Languag
+e-Prolog-Yaswi-0.18-dEJlkA/blib/arch/auto/Language/Prolog/Yaswi/Low/L
+ow.so' for module Language::Prolog::Yaswi::Low: /home/image/.local/sh
+are/.cpan/build/Language-Prolog-Yaswi-0.18-dEJlkA/blib/arch/auto/Lang
+uage/Prolog/Yaswi/Low/Low.so: undefined symbol: PL_open_foreign_frame
+ at /usr/lib/perl/5.10/DynaLoader.pm line 192.
#  at /home/image/.local/share/.cpan/build/Language-Prolog-Yaswi-0.18-
+dEJlkA/blib/lib/Language/Prolog/Yaswi.pm line 54
# Compilation failed in require at /home/image/.local/share/.cpan/buil
+d/Language-Prolog-Yaswi-0.18-dEJlkA/blib/lib/Language/Prolog/Yaswi.pm
+ line 54.
# BEGIN failed--compilation aborted at /home/image/.local/share/.cpan/
+build/Language-Prolog-Yaswi-0.18-dEJlkA/blib/lib/Language/Prolog/Yasw
+i.pm line 54.
# Compilation failed in require at (eval 4) line 2.
# BEGIN failed--compilation aborted at (eval 4) line 2.
# Looks like you failed 1 test of 1.
t/2Yaswi.t ... Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/1 subtests 
t/3simple.t .. Can't load '/home/image/.local/share/.cpan/build/Langua
+ge-Prolog-Yaswi-0.18-dEJlkA/blib/arch/auto/Language/Prolog/Yaswi/Low/
+Low.so' for module Language::Prolog::Yaswi::Low: /home/image/.local/s
+hare/.cpan/build/Language-Prolog-Yaswi-0.18-dEJlkA/blib/arch/auto/Lan
+guage/Prolog/Yaswi/Low/Low.so: undefined symbol: PL_open_foreign_fram
+e at /usr/lib/perl/5.10/DynaLoader.pm line 192.
 at /home/image/.local/share/.cpan/build/Language-Prolog-Yaswi-0.18-dE
+JlkA/blib/lib/Language/Prolog/Yaswi.pm line 54
Compilation failed in require at /home/image/.local/share/.cpan/build/
+Language-Prolog-Yaswi-0.18-dEJlkA/blib/lib/Language/Prolog/Yaswi.pm l
+ine 54.
BEGIN failed--compilation aborted at /home/image/.local/share/.cpan/bu
+ild/Language-Prolog-Yaswi-0.18-dEJlkA/blib/lib/Language/Prolog/Yaswi.
+pm line 54.
Compilation failed in require at t/3simple.t line 13.
BEGIN failed--compilation aborted at t/3simple.t line 13.
# Looks like your test exited with 2 before it could output anything.
t/3simple.t .. Dubious, test returned 2 (wstat 512, 0x200)
Failed 27/27 subtests 
t/4pods.t .... skipped: Only the author needs to check that POD docs a
+re right
t/5opaque.t .. Can't load '/home/image/.local/share/.cpan/build/Langua
+ge-Prolog-Yaswi-0.18-dEJlkA/blib/arch/auto/Language/Prolog/Yaswi/Low/
+Low.so' for module Language::Prolog::Yaswi::Low: /home/image/.local/s
+hare/.cpan/build/Language-Prolog-Yaswi-0.18-dEJlkA/blib/arch/auto/Lan
+guage/Prolog/Yaswi/Low/Low.so: undefined symbol: PL_open_foreign_fram
+e at /usr/lib/perl/5.10/DynaLoader.pm line 192.
 at /home/image/.local/share/.cpan/build/Language-Prolog-Yaswi-0.18-dE
+JlkA/blib/lib/Language/Prolog/Yaswi.pm line 54
Compilation failed in require at /home/image/.local/share/.cpan/build/
+Language-Prolog-Yaswi-0.18-dEJlkA/blib/lib/Language/Prolog/Yaswi.pm l
+ine 54.
BEGIN failed--compilation aborted at /home/image/.local/share/.cpan/bu
+ild/Language-Prolog-Yaswi-0.18-dEJlkA/blib/lib/Language/Prolog/Yaswi.
+pm line 54.
Compilation failed in require at t/5opaque.t line 12.
BEGIN failed--compilation aborted at t/5opaque.t line 12.
# Looks like your test exited with 2 before it could output anything.
t/5opaque.t .. Dubious, test returned 2 (wstat 512, 0x200)
Failed 2/2 subtests 

Test Summary Report
-------------------
t/1Low.t   (Wstat: 256 Tests: 1 Failed: 1)
  Failed test:  1
  Non-zero exit status: 1
t/2Yaswi.t (Wstat: 256 Tests: 1 Failed: 1)
  Failed test:  1
  Non-zero exit status: 1
t/3simple.t (Wstat: 512 Tests: 0 Failed: 0)
  Non-zero exit status: 2
  Parse errors: Bad plan.  You planned 27 tests but ran 0.
t/5opaque.t (Wstat: 512 Tests: 0 Failed: 0)
  Non-zero exit status: 2
  Parse errors: Bad plan.  You planned 2 tests but ran 0.
Files=5, Tests=2,  2 wallclock secs ( 0.13 usr  0.04 sys +  1.12 cusr 
+ 0.16 csys =  1.45 CPU)
Result: FAIL
Failed 4/5 test programs. 2/2 subtests failed.
make: *** [test_dynamic] Error 2
  SALVA/Language-Prolog-Yaswi-0.18.tar.gz
  /usr/bin/make test -- NOT OK
//hint// to see the cpan-testers results for installing this module, t
+ry:
  reports SALVA/Language-Prolog-Yaswi-0.18.tar.gz
Running make install
  make test had returned bad status, won't install without force

[download]

Your thoughts much appreciated

Regards

Steve

Replies are listed 'Best First'.
Re: What's happened to Yaswi?
by Anonymous Monk on Aug 24, 2011 at 12:00 UTC

    error blah DynaLoader blah blah

    means run ldd ...blib/arch/auto/Language/Prolog/Yaswi/Low/Low.so and adjust LD_LIBRARY_PATH

[reply]
[d/l]

      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.

[reply]
[d/l]
[select]
        Yes, that was the problem, the name used for the library got changed on SWI-Prolog 5.10.

        I will release a new version shortly.

[reply]

        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).

        If that were the case, there would be no .so file generated, there would be no .so file to try to load

[reply]

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