第一次出现桌面提醒，我选择关闭。。现在想打开，可却找不到地方。

#5 楼 @Jacob 是的，Xcode 已经装了。

#2 楼 @ywjno 运行 rvm requirements 的提示是这样的：

Notes for Mac OS X 10.8.2, Xcode 4.4.1.

For JRuby: Install the JDK. See http://developer.apple.com/java/download/ # Current Java version "1.6.0_26" For IronRuby: Install Mono >= 2.6 For Ruby 1.9.3: Install libksba # If using Homebrew, 'brew install libksba'

To use an RVM installed Ruby as default, instead of the system ruby:

rvm install 1.8.7 # installs patch 357: closest supported version rvm system ; rvm gemset export system.gems ; rvm 1.8.7 ; rvm gemset import system.gems # migrate your gems rvm alias create default 1.8.7

And reopen your terminal windows.

Xcode and gcc:

Right now Ruby requires gcc to compile, but Xcode 4.2 and later no longer ship with gcc. Instead they ship with llvm-gcc (to which gcc is a symlink) and clang, neither of which are supported for building Ruby. Xcode 4.1 was the last version to ship gcc, which was /usr/bin/gcc-4.2.

Xcode 4.1 and earlier:

• Ruby will build fine.

Xcode 4.2 and later (including Command Line Tools for Xcode):

• If you have gcc-4.2 (and friends) from an earlier Xcode version, Ruby will build fine.
• If you don't have gcc-4.2, you have two options to get it:
  • Install apple-gcc42 from Homebrew
  • Install osx-gcc-installer

Homebrew:

If you are using Homebrew, you can install the apple-gcc42 and required libraries from homebrew/dupes:

brew update brew tap homebrew/dupes brew install autoconf automake apple-gcc42 rvm pkg install openssl

Xcode 4.2+ install or/and Command Line Tools for Xcode is required to provide make and other tools.

osx-gcc-installer:

If you don't use Homebrew, you can download and install osx-gcc-installer: https://github.com/kennethreitz/osx-gcc-installer.

Warning: Installing osx-gcc-installer on top of a recent Xcode is known to cause problems, so you must uninstall Xcode before installing osx-gcc-installer. Afterwards you may install Xcode 4.2+ or Command Line Tools for Xcode if you desire.

** NOTE: Currently, Node.js is having issues building with osx-gcc-installer. The only fix is to install Xcode over osx-gcc-installer.

#1 楼 @sailtsao 谢谢回复啊，贴一个我的 make.log

[2012-10-20 00:58:53] make CC = clang LD = ld LDSHARED = clang -dynamiclib CFLAGS = -I/Users/kkkk/.rvm/usr/include -fno-common -pipe XCFLAGS = -include ruby/config.h -include ruby/missing.h -fvisibility=hidden -DRUBY_EXPORT CPPFLAGS = -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -I. -I.ext/include/x86_64-darwin12.2.0 -I./include -I. DLDFLAGS = -Wl,-undefined,dynamic_lookup -Wl,-multiply_defined,suppress -Wl,-flat_namespace -install_name /Users/kkkk/.rvm/rubies/ruby-1.9.3-p286/lib/libruby.1.9.1.dylib -current_version 1.9.1 -compatibility_version 1.9.1 -Wl,-unexported_symbol,Init* -Wl,-unexported_symbol,threadptr -Wl,-u,_objc_msgSend
SOLIBS = linking miniruby rbconfig.rb updated generating enc.mk generating prelude.c compiling prelude.c linking static-library libruby.1.9.1-static.a linking shared-library libruby.1.9.1.dylib generating encdb.h encdb.h unchanged making enc make[1]: Nothing to be done for enc'. making srcs under enc make[1]: Nothing to be done forsrcs'. generating transdb.h transdb.h unchanged making trans make[1]: Nothing to be done for `./enc/trans'. making encs configuring -test-/add_suffix configuring -test-/array/resize configuring -test-/bug-3571 configuring -test-/bug-3662 configuring -test-/funcall configuring -test-/load/dot.dot configuring -test-/old_thread_select configuring -test-/st/numhash configuring -test-/string configuring -test-/wait_for_single_fd configuring -test-/win32/dln Failed to configure -test-/win32/dln. It will not be installed. configuring -test-/win32/fd_setsize Failed to configure -test-/win32/fd_setsize. It will not be installed. configuring bigdecimal configuring continuation configuring coverage configuring curses configuring date configuring dbm configuring digest configuring digest/bubblebabble configuring digest/md5 configuring digest/rmd160 configuring digest/sha1 configuring digest/sha2 configuring dl configuring dl/callback configuring dl/win32 Failed to configure dl/win32. It will not be installed. configuring etc configuring fcntl configuring fiber configuring fiddle configuring gdbm Failed to configure gdbm. It will not be installed. configuring iconv configuring io/console configuring io/nonblock configuring io/wait configuring json configuring json/generator configuring json/parser configuring mathn/complex configuring mathn/rational configuring nkf configuring objspace configuring openssl configuring pathname configuring psych configuring pty configuring racc/cparse configuring readline configuring ripper configuring sdbm configuring socket configuring stringio configuring strscan configuring syck configuring syslog configuring tk check functions......... check struct members.. check libraries.... Use ActiveTcl libraries (if available). Search tclConfig.sh and tkConfig.sh.................................... Valid [tclConfig.sh, tkConfig.sh] are found in [["/System/Library/Frameworks/Tcl.framework", "/System/Library/Frameworks/Tk.framework"], ["/usr/lib", "/usr/lib"], ["/System/Library/Frameworks/Tcl.framework/Versions/Current", "/System/Library/Frameworks/Tk.framework/Versions/Current"], ["/System/Library/Frameworks/Tcl.framework/Versions/8.5", "/System/Library/Frameworks/Tk.framework/Versions/8.5"], ["/System/Library/Frameworks/Tcl.framework/Versions/8.4", "/System/Library/Frameworks/Tk.framework/Versions/8.4"]] Use [tclConfig.sh, tkConfig.sh] == ["/System/Library/Frameworks/Tcl.framework/tclConfig.sh", "/System/Library/Frameworks/Tk.framework/tkConfig.sh"] Use MacOS X Frameworks.

Find Tcl/Tk libraries. Make tcltklib.so which is required by Ruby/Tk. configuring tk/tkutil configuring win32ole Failed to configure win32ole. It will not be installed. configuring zlib linking shared-object -test-/add_suffix/bug.bundle installing default bug libraries linking shared-object -test-/array/resize.bundle installing default resize libraries linking shared-object -test-/bug-3571/bug.bundle installing default bug libraries linking shared-object -test-/bug-3662/bug.bundle installing default bug libraries linking shared-object -test-/funcall/funcall.bundle installing default funcall libraries linking shared-object -test-/load/dot.dot/dot.dot.bundle installing default dot.dot libraries linking shared-object -test-/old_thread_select/old_thread_select.bundle installing default old_thread_select libraries linking shared-object -test-/st/numhash.bundle installing default numhash libraries linking shared-object -test-/string/string.bundle installing default string libraries linking shared-object -test-/wait_for_single_fd/wait_for_single_fd.bundle installing default wait_for_single_fd libraries make[2]: Nothing to be done for all'. make[2]: Nothing to be done forall'. linking shared-object bigdecimal.bundle installing default bigdecimal libraries linking shared-object continuation.bundle installing default continuation libraries linking shared-object coverage.bundle installing default coverage libraries linking shared-object curses.bundle installing default curses libraries linking shared-object date_core.bundle installing default date_core libraries linking shared-object dbm.bundle installing default dbm libraries linking shared-object digest.bundle installing digest libraries installing default digest libraries linking shared-object digest/bubblebabble.bundle installing default bubblebabble libraries linking shared-object digest/md5.bundle installing default md5 libraries linking shared-object digest/rmd160.bundle installing default rmd160 libraries linking shared-object digest/sha1.bundle installing default sha1 libraries linking shared-object digest/sha2.bundle installing default sha2 libraries linking shared-object dl.bundle installing dl libraries installing default dl libraries linking shared-object dl/callback.bundle installing default callback libraries make[2]: Nothing to be done for all'. linking shared-object etc.bundle installing default etc libraries linking shared-object fcntl.bundle installing default fcntl libraries linking shared-object fiber.bundle installing default fiber libraries linking shared-object fiddle.bundle installing default fiddle libraries make[2]: Nothing to be done forall'. linking shared-object iconv.bundle installing default iconv libraries linking shared-object io/console.bundle installing default console libraries linking shared-object io/nonblock.bundle installing default nonblock libraries linking shared-object io/wait.bundle installing default wait libraries installing default libraries linking shared-object json/ext/generator.bundle installing default generator libraries linking shared-object json/ext/parser.bundle installing default parser libraries linking shared-object mathn/complex.bundle installing default complex libraries linking shared-object mathn/rational.bundle installing default rational libraries linking shared-object nkf.bundle installing default nkf libraries linking shared-object objspace.bundle installing default objspace libraries linking shared-object openssl.bundle installing default openssl libraries linking shared-object pathname.bundle installing default pathname libraries linking shared-object psych.bundle installing default psych libraries linking shared-object pty.bundle installing default pty libraries linking shared-object racc/cparse.bundle installing default cparse libraries compiling readline.c readline.c:1499:9: error: use of undeclared identifier 'username_completion_function'; did you mean 'rl_username_completion_function'? rl_username_completion_function); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ rl_username_completion_function readline.c:69:42: note: expanded from macro 'rl_username_completion_function'

define rl_username_completion_function username_completion_function

^ /Users/kkkk/.rvm/usr/include/readline/readline.h:443:14: note: 'rl_username_completion_function' declared here extern char rl_username_completion_function PARAMS((const char *, int)); ^ 1 error generated. make[2]: ** [readline.o] Error 1 make[1]: *** [ext/readline/all] Error 2 make: *** [build-ext] Error 2