我有一个现有的 Ruby On Rails 项目，我正在尝试启动并运行该项目，但是当我尝试迁移数据库时，它显示:
$ rake db:migrate
Could not find json-1.6.5 in any of the sources
当我尝试安装特定的 gem 时，它失败了!
$ gem install json -v '1.6.5'
Fetching: json-1.6.5.gem (100%)
Building native extensions. This could take a while...
ERROR: Error installing json:
ERROR: Failed to build gem native extension.
/Users/dev/.rvm/rubies/ruby-1.9.2-p136/bin/ruby extconf.rb
creating Makefile
make
sh: make: command not found
Gem files will remain installed in /Users/dev/.rvm/gems/ruby-1.9.2-p136@rails3/gems/json-1.6.5 for inspection.
Results logged to /Users/dev/.rvm/gems/ruby-1.9.2-p136@rails3/gems/json-1.6.5/ext/json/ext/parser/gem_make.out
最佳答案
您似乎缺少一些命令行工具。
验证您是否已安装 make
$ whereis make
应该返回类似:
/usr/bin/make
和
$ make -v
应该类似于:
GNU Make 3.81
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
This program built for i386-apple-darwin11.0
如果您没有看到类似的内容，也许您应该查看这篇文章 https://stackoverflow.com/a/10217910/335523
关于ruby-on-rails - 无法安装特定的 gem，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/10650135/