libxml-ruby: Failed to build gem native extension

Question

I\'m trying to install libxml-ruby. I have installed libxml2, libxslt and coreutils

I have also read other posts rega

Answer 1

Homebrew:

libxml2 is keg-only, which means it was not symlinked into /usr/local, because macOS already provides this software and installing another version in parallel can cause all kinds of trouble.

So, we need to set libxml path directly

brew install libxml2

gem install libxml-ruby \
-- \
--with-xml2-config="$(brew --prefix libxml2)/bin/xml2-config"

P.S.

If you get the exception on lastest rubies:

Just ignore it. The gem was successfully installed. Just the Rdoc documentation generation failed.

The internal error was:

        (NoMethodError) undefined method `[]' for nil:NilClass

ERROR:  While executing gem ... (NoMethodError)
    undefined method `[]' for nil:NilClass