gem native extension error while installing cocoapods

Question

Am trying to reinstall cocoapods in my MacBook air after changing my SSD, now am getting this bellow error.

sudo gem install cocoapods

Building native extensions. This could take a while... ERROR: Error installing cocoapods: ERROR: Failed to build gem native extension.

current directory: /Library/Ruby/Gems/2.3.0/gems/ffi-1.12.2/ext/ffi_c 

/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/bin/ruby -r ./siteconf20200308-27204-6l0a5q.rb extconf.rb mkmf.rb can't find header files for ruby at /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/include/ruby.h

extconf failed, exit code 1

Gem files will remain installed in /Library/Ruby/Gems/2.3.0/gems/ffi-1.12.2 for inspection. Results logged to /Library/Ruby/Gems/2.3.0/extensions/universal-darwin-18/2.3.0/ffi-1.12.2/gem_make.out

Answer 1

Open Terminal

curl -L https://get.rvm.io | bash -s stable

Reopen Terminal

rvm install ruby-2.6

rvm use ruby-2.6.3

rvm --default use 2.6.3

From MahmoudKhaled's comment on link

Answer 2

For me it worked by installing a previous version of cocoapods

sudo gem install cocoapods -v 1.8.4 

Hope it helps