Flora-2 failures on OSX

runflora log

$ ./flora2/runflora
% Specialising partially instantiated calls to flora_assert_directories/1
[Compiling Foreign Module /Users/felix/Documents/code/flora2/flora2bundle/flora2/cc/prolog2hilog (Prolog compiler options are ignored)]
[prolog2hilog compiled, cpu time used: 0.0010 seconds]
[Compiling C file /Users/felix/Documents/code/flora2/flora2bundle/flora2/cc/prolog2hilog.c using gcc]
/Users/felix/Documents/code/flora2/flora2bundle/flora2/cc/prolog2hilog.c:365:9: warning: comparison of 0 > unsigned expression is always false [-Wtautological-compare]
  if (0 > length_diff) return FALSE;
      ~ ^ ~~~~~~~~~~~
1 warning generated.
gcc -dynamiclib -undefined dynamic_lookup -fPIC -o /Users/felix/Documents/code/flora2/flora2bundle/flora2/cc/prolog2hilog.dylib /Users/felix/Documents/code/flora2/flora2bundle/flora2/cc/prolog2hilog.c   -Wall -fPIC -I/Users/felix/Documents/code/flora2/flora2bundle/XSB/emu -I/Users/felix/Documents/code/flora2/flora2bundle/XSB/config/i386-apple-darwin13.2.0    -O3 -fno-strict-aliasing   -fPIC -Wall -pipe     -lm
[Compiling Foreign Module /Users/felix/Documents/code/flora2/flora2bundle/flora2/cc/flora_ground (Prolog compiler options are ignored)]
[flora_ground compiled, cpu time used: 0.0010 seconds]
[Compiling C file /Users/felix/Documents/code/flora2/flora2bundle/flora2/cc/flora_ground.c using gcc]
/Users/felix/Documents/code/flora2/flora2bundle/flora2/cc/flora_ground.c:115:15: warning: comparison of unsigned expression < 0 is always false [-Wtautological-compare]
  if (difflen < 0) return FALSE;
      ~~~~~~~ ^ ~
1 warning generated.
gcc -dynamiclib -undefined dynamic_lookup -fPIC -o /Users/felix/Documents/code/flora2/flora2bundle/flora2/cc/flora_ground.dylib /Users/felix/Documents/code/flora2/flora2bundle/flora2/cc/flora_ground.c   -Wall -fPIC -I/Users/felix/Documents/code/flora2/flora2bundle/XSB/emu -I/Users/felix/Documents/code/flora2/flora2bundle/XSB/config/i386-apple-darwin13.2.0    -O3 -fno-strict-aliasing   -fPIC -Wall -pipe     -lm

FLORA-2 Version 1.0 (Cherimoya) of 2014-07-02 03:25:03 (rev: 1203)
XSB Version 3.5.0 (Maotai) of 2013-7-6 (darwin13.2.0, 64 bits)

Welcome! Type \help. to display the help message.



flora2 ?- \help.

++Error[Flora-2]> attempt to call an undefined Prolog predicate _$_$_flora'silent_equal/2 in module `usermod'

flora2 ?- \help.

++Error[Flora-2]> attempt to call an undefined Prolog predicate _$_$_flora'silent_equal/2 in module `usermod'

flora2 ?- \halt.

++Error[Flora-2]> attempt to call an undefined Prolog predicate _$_$_flora'silent_equal/2 in module `usermod'

flora2 ?- \end.

++Error[Flora-2]> attempt to call an undefined Prolog predicate _$_$_flora'silent_equal/2 in module `usermod'