Symbols missing when compiling --without-bugnums.
Imported from http://bugzilla.roxen.com/bugzilla/show_bug.cgi?id=448
Reported by @grubba
/home/grubba/src/Pike7.1/build/darwin/smartlink cc -I.
-I/home/grubba/src/Pike7.1/src -I/home/grubba/src/Pike7.1/src
-I/home/grubba/src/Pike7.1/build/darwin -g -framework Zip -O2 -pipe -W
-Wall -Wno-unused -Wcomment -Wformat -Wimplicit-function-declaration
-Wmultichar -Wswitch -Wuninitialized -Wpointer-arith -Wchar-subscripts
-Wno-long-long language.o security.o bignum.o interpret.o constants.o
cpp.o fdlib.o cyclic.o array.o backend.o callback.o encode.o docode.o
dynamic_buffer.o dynamic_load.o error.o fd_control.o fsort.o gc.o
hashtable.o lex.o multiset.o signal_handler.o pike_types.o main.o mapping.o
pike_memory.o module.o module_support.o object.o opcodes.o operators.o
port.o program.o rusage.o stralloc.o stuff.o threads.o version.o queue.o
builtin.o svalue.o las_t.o builtin_functions_t.o peep_t.o cat modules/linker_options
-o tpike
/usr/bin/ld: Undefined symbols:
_int64_from_bignum
_is_bignum_object