sudo gem install cocoapods 报错

Building native extensions. This could take a while...

ERROR:  Error installing cocoapods:

ERROR: Failed to build gem native extension.

    current directory: /Library/Ruby/Gems/2.6.0/gems/ffi-1.15.4/ext/ffi_c

/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/bin/ruby -I /Library/Ruby/Site/2.6.0 -r ./siteconf20211225-28121-nm1wz4.rb extconf.rb

checking for ffi.h... *** extconf.rb failed ***

这个就是gem安装有问题，，，更新rvm ，然后再升级ruby的

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