compiling readline.c
readline.c: In function ‘Init_readline’:
readline.c:1886:26: error: ‘Function’ undeclared (first use in this function)
rl_pre_input_hook = (Function *)readline_pre_input_hook;
^
readline.c:1886:26: note: each undeclared identifier is reported only once for e ach function it appears in
readline.c:1886:36: error: expected expression before ‘)’ token
rl_pre_input_hook = (Function *)readline_pre_input_hook;
^
readline.c: At top level:
readline.c:530:1: warning: ‘readline_pre_input_hook’ defined but not used [-Wunu sed-function]
readline_pre_input_hook(void)
^
make[2]: *** [readline.o] Error 1
make[2]: Leaving directory `/tmp/ruby/ruby-2.0.0-p353/ext/readline'
make[1]: *** [ext/readline/all] Error 2