The relevant part of the log is actually:
:info:build Undefined symbols for architecture x86_64:
:info:build "_tgetent", referenced from:
:info:build _terminfo_core_init in terminfo-core.o
:info:build "_tgetflag", referenced from:
:info:build _terminfo_core_init in terminfo-core.o
:info:build "_tgetnum", referenced from:
:info:build _terminfo_core_init in terminfo-core.o
:info:build "_tgetstr", referenced from:
:info:build _terminfo_core_init in terminfo-core.o
:info:build "_tputs", referenced from:
:info:build __set_fg in terminfo-core.o
:info:build __set_bg in terminfo-core.o
:info:build _terminfo_cont in terminfo-core.o
:info:build _terminfo_stop in terminfo-core.o
:info:build __move_cup in terminfo-core.o
:info:build __move_pa in terminfo-core.o
:info:build __move_relative in terminfo-core.o
:info:build ...
:info:build ld: symbol(s) not found for architecture x86_64
FWIW, it builds fine for me, on the same OS X and Xcode version.