我正在尝试在虚拟机上安装Gitlab CI，我正在关注this instructions这样做。
第2点是关于安装和编译ruby。当我执行命令make时，我在进程结束时遇到以下错误消息：
make[2]: Entering directory `/tmp/ruby/ruby-2.0.0-p353/ext/pty'
compiling pty.c
pty.c: In function ‘chfunc’:
pty.c:143:12: warning: ignoring return value of ‘seteuid’, declared with attribute warn_unused_result [-Wunused-result]
seteuid(getuid());
^
linking shared-object pty.so
installing default pty libraries
make[2]: Leaving directory `/tmp/ruby/ruby-2.0.0-p353/ext/pty'
make[2]: Entering directory `/tmp/ruby/ruby-2.0.0-p353/ext/racc/cparse'
compiling cparse.c
linking shared-object racc/cparse.so
installing default cparse libraries
make[2]: Leaving directory `/tmp/ruby/ruby-2.0.0-p353/ext/racc/cparse'
make[2]: Entering directory `/tmp/ruby/ruby-2.0.0-p353/ext/readline'
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 each 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 [-Wunused-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
make[1]: Leaving directory `/tmp/ruby/ruby-2.0.0-p353'
make: *** [build-ext] Error 2
这是一个更长的日志：http://pastebin.com/m6wzLVd9
我该怎么做才能解决这个问题？