在装有Ruby 2.0.0的Windows 7上安装sinatra-contrib时出错

Question

我正在尝试在Windows7上安装sinatra-contrib gem，我得到了下面显示的错误。有什么想法吗？

U:\>gem install sinatra-contrib
Temporarily enhancing PATH to include DevKit...
Building native extensions.  This could take a while...
ERROR:  Error installing sinatra-contrib:
        ERROR: Failed to build gem native extension.

    C:/Ruby200-x64/bin/ruby.exe extconf.rb
checking for main() in -lssl... no
checking for rb_trap_immediate in ruby.h,rubysig.h... no
checking for rb_thread_blocking_region()... yes
checking for inotify_init() in sys/inotify.h... no
checking for __NR_inotify_init in sys/syscall.h... no
checking for writev() in sys/uio.h... no
checking for rb_wait_for_single_fd()... yes
checking for rb_enable_interrupt()... no
checking for rb_time_new()... yes
checking for windows.h... yes
checking for winsock.h... yes
checking for main() in -lkernel32... yes
checking for main() in -lrpcrt4... yes
checking for main() in -lgdi32... yes
creating Makefile

make
generating rubyeventmachine-x64-mingw32.def
compiling binder.cpp
cc1plus.exe: warning: command line option '-Wdeclaration-after-statement' is valid for C/ObjC but not for C++ [enabled by defa
cc1plus.exe: warning: command line option '-Wimplicit-function-declaration' is valid for C/ObjC but not for C++ [enabled by de
In file included from binder.cpp:20:0:
project.h:26:0: warning: ignoring #pragma warning  [-Wunknown-pragmas]
In file included from project.h:149:0,
                 from binder.cpp:20:
binder.h:35:34: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
In file included from c:\rubydevkit\mingw\bin\../lib/gcc/x86_64-w64-mingw32/4.7.2/../../../../x86_64-w64-mingw32/include/proce
                 from c:/Ruby200-x64/include/ruby-2.0.0/ruby/win32.h:60,
                 from c:/Ruby200-x64/include/ruby-2.0.0/ruby/defines.h:153,
                 from c:/Ruby200-x64/include/ruby-2.0.0/ruby/ruby.h:70,
                 from c:/Ruby200-x64/include/ruby-2.0.0/ruby.h:33,
                 from em.h:24,
                 from project.h:150,
                 from binder.cpp:20:
c:\rubydevkit\mingw\bin\../lib/gcc/x86_64-w64-mingw32/4.7.2/../../../../x86_64-w64-mingw32/include/sys/types.h:68:16: error: c
id_t pid_t'
In file included from binder.cpp:20:0:
project.h:97:13: error: 'pid_t' has a previous declaration as 'typedef int pid_t'
In file included from project.h:150:0,
                 from binder.cpp:20:
em.h:84:47: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
em.h:85:76: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
em.h:86:56: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
em.h:88:57: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
em.h:89:60: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
em.h:90:58: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
em.h:91:36: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
em.h:93:47: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
em.h:99:42: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
em.h:116:45: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
em.h:125:36: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
In file included from project.h:151:0,
                 from binder.cpp:20:
ed.h: In member function 'void EventableDescriptor::SetSocketInvalid()':
ed.h:43:40: warning: overflow in implicit constant conversion [-Woverflow]
In file included from project.h:154:0,
                 from binder.cpp:20:
eventmachine.h: At global scope:
eventmachine.h:46:61: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
eventmachine.h:47:112: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
eventmachine.h:48:69: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
eventmachine.h:50:73: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
eventmachine.h:65:75: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
eventmachine.h:66:74: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
eventmachine.h:67:77: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
eventmachine.h:68:41: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
In file included from project.h:154:0,
                 from binder.cpp:20:
eventmachine.h:103:58: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
eventmachine.h:105:60: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
eventmachine.h:108:41: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
make: *** [binder.o] Error 1


Gem files will remain installed in C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/eventmachine-1.0.1 for inspection.
Results logged to C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/eventmachine-1.0.1/ext/gem_make.out

Answer 1

sinatra-contrib依赖于EventMachine，这是目前在Ruby2.0和更多版本中被破坏的，RubyInstaller使用的是GCC 4.7.2。

在RubyInstaller组中有一个关于这个here的帖子，也被报告给了EventMachine，名为issue #412

将sinatra-contrib与eventmachine分离的请求也是很久以前提出的，就像issue #30一样，但它从未得到官方修复。

在EventMachine中解决与GCC 4.7.2的编译问题之前，唯一的解决方法是要求sinatra维护者删除事件机器依赖。

希望这能有所帮助。