使用xcode 4.5.1在OSX Lion 10.8.2上编译eventmachine gem

Question

我看到了我能找到的所有地方,但似乎无法找到解决方案.我在Lion 10.8.2上使用xcode 4.5.1 - 我正在尝试为一个rails项目运行bundle而且它一直在干扰它.我正在使用宝石'瘦'用于heroku.现在我不得不做 - 没有人找到解决方案？

Bolanos@Jeremys-Mac-mini ?-1.9.3 fishfarm $ sudo gem install eventmachine
Password:
Building native extensions.  This could take a while...
ERROR:  Error installing eventmachine:
    ERROR: Failed to build gem native extension.

        /Users/Bolanos/.rvm/rubies/ruby-1.9.3-p194/bin/ruby extconf.rb
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... yes
checking for rb_thread_check_ints()... yes
checking for rb_time_new()... yes
checking for sys/event.h... yes
checking for sys/queue.h... yes
creating Makefile

make
compiling binder.cpp
make: g++-4.2: No such file or directory
make: *** [binder.o] Error 1


Gem files will remain installed in /Users/Bolanos/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/gems/1.9.1/gems/eventmachine-1.0.0 for inspection.
Results logged to /Users/Bolanos/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/gems/1.9.1/gems/eventmachine-1.0.0/ext/gem_make.out

Answer 1

还要检查符号链接:

$ sudo ln -s/usr/bin/g ++ /usr/bin/g++-4.2

Answer 2

您必须从developer.apple.com安装命令行工具包。

另外，我在使用 MacOSX10.6.sdk 时遇到了麻烦，因为那里缺少一些标头，所以我安装了 MacOSX10.5.sdk 并且一切正常。