为什么在运行bundle install时，所有具有本机扩展的gem都无法安装？
我使用ruby 2.2.5并且bundle install无法安装具有本机扩展名的gem。 这是我为json gem获得的错误。
Gem::Ext::BuildError: ERROR: Failed to build gem native extension. /Users/Mr_AdeyBee/.rvm/rubies/ruby-2.2.5/bin/ruby -r ./siteconf20160724-3304-1j34bow.rb extconf.rb creating Makefile make "DESTDIR=" clean make "DESTDIR=" compiling bcrypt_ext.c compiling crypt.c compiling crypt_blowfish.c compiling crypt_gensalt.c compiling wrapper.c linking shared-object bcrypt_ext.bundle ld: warning: directory not found for option '-L/Users/travis/.sm/pkg/active/lib' make "DESTDIR=" install make: /usr/local/bin/gmkdir: No such file or directory make: *** [.RUBYARCHDIR.time] Error 1 make install failed, exit code 2 Gem files will remain installed in /Users/Mr_AdeyBee/.rvm/gems/ruby-2.2.5/gems/bcrypt-3.1.11 for inspection. Results logged to /Users/Mr_AdeyBee/.rvm/gems/ruby-2.2.5/extensions/x86_64-darwin-15/2.2.0-static/bcrypt-3.1.11/gem_make.out
这也是byebug的错误。
Gem::Ext::BuildError: ERROR: Failed to build gem native extension. /Users/Mr_AdeyBee/.rvm/rubies/ruby-2.2.5/bin/ruby -r ./siteconf20160724-3304-1vjgvan.rb extconf.rb creating Makefile make "DESTDIR=" clean make "DESTDIR=" compiling breakpoint.c compiling byebug.c compiling context.c compiling locker.c compiling threads.c linking shared-object byebug/byebug.bundle ld: warning: directory not found for option '-L/Users/travis/.sm/pkg/active/lib' make "DESTDIR=" install make: /usr/local/bin/gmkdir: No such file or directory make: *** [.RUBYARCHDIR.-.byebug.time] Error 1 make install failed, exit code 2 Gem files will remain installed in /Users/Mr_AdeyBee/.rvm/gems/ruby-2.2.5/gems/byebug-9.0.5 for inspection. Results logged to /Users/Mr_AdeyBee/.rvm/gems/ruby-2.2.5/extensions/x86_64-darwin-15/2.2.0-static/byebug-9.0.5/gem_make.out
我尝试用sudo安装，我得到了相同的结果。 我也尝试了一些谷歌建议的结果，我似乎找不到合适的解决方案。
Ruby版本 – > 2.2.5 Rails版本 – > 4.2.5
我怎么能克服这个？
尝试：
> brew install coreutils > gem install json