出了什么问题？尝试gem install bcrypt，gem install bcrypt-ruby，并获得相同的结果。由于此错误，无法在轨道上的ruby中进行捆绑安装。
sylviachoong@sylviachoong:~/Desktop/postco$ gem install bcrypt-ruby
Building native extensions. This could take a while...
ERROR: Error installing bcrypt-ruby:
ERROR: Failed to build gem native extension.
current directory: /home/sylviachoong/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/bcrypt- 3.1.12/ext/mri
/home/sylviachoong/.rbenv/versions/2.5.0/bin/ruby -r ./siteconf20180526-3491-4idkgq.rb extconf.rb
creating Makefile
current directory: /home/sylviachoong/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/bcrypt-3.1.12/ext/mri
make "DESTDIR=" clean
current directory: /home/sylviachoong/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/bcrypt-
3.1.12/ext/mri
make "DESTDIR="
compiling bcrypt_ext.c
gcc: error: unrecognized command line option '-Wmisleading-indentation'
gcc: error: unrecognized command line option '-Wduplicated-cond'
Makefile:241: recipe for target 'bcrypt_ext.o' failed
make: *** [bcrypt_ext.o] Error 1
make failed, exit code 2
Gem files will remain installed in /home/sylviachoong/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/bcrypt-3.1.12 for inspection.
Results logged to /home/sylviachoong/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/extensions/x86_64-linux/2.5.0-static/bcrypt-3.1.12/gem_make.out
答案 0 :(得分：1)
首先运行此命令，然后安装gem
sudo apt-get install libmagickwand-dev
答案 1 :(得分：0)
启用rbenv install 2.5.1，gem install bundler和rbenv rehash。
固定。
答案 2 :(得分：-1)
issue命令
bundle update bcrypt