Installing swi-prolog-devel does not work

[W.G.J.Beek@…]

Installing the swi-prolog-devel port on Mac OS-X Snow Leopard (10.6.1) gives me the following error:

Error: Target org.macports.build returned: shell command " cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_lang_swi-prolog-devel/work/pl-5.7.4" && /usr/bin/make -j2 all " returned error 2
Command output:       _scan_decimal in pl-read.o
  "___gmpq_set", referenced from:
      _ar_u_minus in pl-arith.o
      _ar_abs in pl-arith.o
      _cpNumber in pl-gmp.o
      _PL_get_mpq in pl-gmp.o
      _PL_unify_mpq in pl-gmp.o
  "_rl_line_buffer", referenced from:
      _prolog_complete in pl-rl.o
      _prolog_completion in pl-rl.o
      _prolog_completion in pl-rl.o
  "___gmpz_add_ui", referenced from:
      _ar_add_ui in pl-arith.o
      _ar_ceil in pl-arith.o
      _scan_number in pl-read.o
      _scan_decimal in pl-read.o
  "_filename_completion_function", referenced from:
      _prolog_completion in pl-rl.o
  "___gmpq_sub", referenced from:
      _ar_minus in pl-arith.o
      _ar_float_fractional_part in pl-arith.o
      _ar_integer in pl-arith.o
  "___gmpz_scan1", referenced from:
      _ar_lsb in pl-arith.o
  "_rl_begin_undo_group", referenced from:
      _prolog_complete in pl-rl.o
ld: symbol(s) not found
collect2: ld returned 1 exit status
make[1]: *** [../lib/i386-darwin10.0.0/libpl.dylib] Error 1
make: *** [lite] Error 2

Error: Status 1 encountered during processing.

[W.G.J.Beek@…]

Cc Me!