gem install json
Building native extensions. This could take a while...
ERROR: Error installing json:
ERROR: Failed to build gem native extension.
/home/user/.rvm/rubies/ruby-2.2.3/bin/ruby -r ./siteconf20150916-3216-1xudd6p.rb extconf.rb
creating Makefile
make "DESTDIR=" clean
make "DESTDIR="
compiling generator.c
linking shared-object json/ext/generator.so
/usr/bin/ld: cannot find -lgmp
collect2: error: ld returned 1 exit status
make: *** [generator.so] Error 1
make failed, exit code 2
Gem files will remain installed in /home/user/.rvm/gems/ruby-2.2.3/gems/json-1.8.3 for inspection.
Results logged to /home/user/.rvm/gems/ruby-2.2.3/extensions/x86_64-linux/2.2.0/json-1.8.3/gem_make.out
Hey. I'm trying to push the hero, but this is a dead end. Firstly, sqlit3 problem. Now I can not install json when I type bundle. What should I do now?
Thanks in advance.
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