尝试对网络应用进行问题排查，并且这样做我将完成http://wiki.dreamhost.com/Rails_3中的步骤。我坚持试图让控制台运行。它要求我捆绑，然后当我收到bcrypt-ruby -v'3.0.1'的错误时。这是我尝试使用gem install时遇到的错误：
gem install bcrypt-ruby -v '3.0.1'
Building native extensions. This could take a while...
ERROR: Error installing bcrypt-ruby:
ERROR: Failed to build gem native extension.
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb
creating Makefile
make
xcrun cc -I. -I/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin12.0 -I/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin12.0 -I. -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -fno-common -arch i386 -arch x86_64 -g -Os -pipe -fno-common -DENABLE_DTRACE -fno-common -pipe -fno-common -c bcrypt_ext.c
xcrun: Error: failed to exec real xcrun. (No such file or directory)
xcrun cc -I. -I/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin12.0 -I/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin12.0 -I. -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -fno-common -arch i386 -arch x86_64 -g -Os -pipe -fno-common -DENABLE_DTRACE -fno-common -pipe -fno-common -c crypt.c
xcrun: Error: failed to exec real xcrun. (No such file or directory)
xcrun cc -I. -I/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin12.0 -I/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin12.0 -I. -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -fno-common -arch i386 -arch x86_64 -g -Os -pipe -fno-common -DENABLE_DTRACE -fno-common -pipe -fno-common -c crypt_blowfish.c
xcrun: Error: failed to exec real xcrun. (No such file or directory)
xcrun cc -I. -I/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin12.0 -I/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin12.0 -I. -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -fno-common -arch i386 -arch x86_64 -g -Os -pipe -fno-common -DENABLE_DTRACE -fno-common -pipe -fno-common -c crypt_gensalt.c
xcrun: Error: failed to exec real xcrun. (No such file or directory)
xcrun cc -I. -I/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin12.0 -I/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin12.0 -I. -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -fno-common -arch i386 -arch x86_64 -g -Os -pipe -fno-common -DENABLE_DTRACE -fno-common -pipe -fno-common -c wrapper.c
xcrun: Error: failed to exec real xcrun. (No such file or directory)
cc -arch i386 -arch x86_64 -pipe -bundle -undefined dynamic_lookup -o bcrypt_ext.bundle bcrypt_ext.o crypt.o crypt_blowfish.o crypt_gensalt.o wrapper.o -L. -L/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib -L. -arch i386 -arch x86_64 -lruby -lpthread -ldl -lobjc
clang: error: no such file or directory: 'bcrypt_ext.o'
clang: error: no such file or directory: 'crypt.o'
clang: error: no such file or directory: 'crypt_blowfish.o'
clang: error: no such file or directory: 'crypt_gensalt.o'
clang: error: no such file or directory: 'wrapper.o'
make: *** [bcrypt_ext.bundle] Error 1
Gem files will remain installed in /Users/karrde00/.gems/gems/bcrypt-ruby-3.0.1 for inspection.
Results logged to /Users/karrde00/.gems/gems/bcrypt-ruby-3.0.1/ext/mri/gem_make.out