Install nokogiri on macOS Sierra (10.12)

I tried to install nokogiri for macOS and found few issues:

$ gem install nokogiri
Fetching: nokogiri- (100%)
Building native extensions.  This could take a while...
ERROR:  Error installing gollum:
	ERROR: Failed to build gem native extension.

    current directory: /Users/admin/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/nokogiri-
/Users/admin/.rbenv/versions/2.3.1/bin/ruby -r ./siteconf20170226-74031-14etkrn.rb extconf.rb
checking if the C compiler accepts ... yes
checking if the C compiler accepts -Wno-error=unused-command-line-argument-hard-error-in-future... no
Building nokogiri using packaged libraries.
Using mini_portile version 2.1.0
checking for iconv.h... yes
checking for gzdopen() in -lz... yes
checking for iconv... yes

Building Nokogiri with a packaged version of libxml2-2.9.4.

Team Nokogiri will keep on doing their best to provide security
updates in a timely manner, but if this is a concern for you and want
to use the system library instead; abort this installation process and
reinstall nokogiri as follows:

    gem install nokogiri -- --use-system-libraries

If you are using Bundler, tell it to use the option:

    bundle config build.nokogiri --use-system-libraries
    bundle install

Note, however, that nokogiri is not fully compatible with arbitrary
versions of libxml2 provided by OS/package vendors.
Extracting libxml2-2.9.4.tar.gz into tmp/x86_64-apple-darwin15.6.0/ports/libxml2/2.9.4... OK
Running 'configure' for libxml2 2.9.4... OK
Running 'compile' for libxml2 2.9.4... ERROR, review '/Users/admin/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/nokogiri-' to see what happened. Last lines are:
    unsigned short* in = (unsigned short*) inb;
encoding.c:815:27: warning: cast from 'unsigned char *' to 'unsigned short *' increases required alignment from 1 to 2 [-Wcast-align]
    unsigned short* out = (unsigned short*) outb;
4 warnings generated.
  CC       error.lo
  CC       parserInternals.lo
  CC       parser.lo
  CC       tree.lo
  CC       hash.lo
  CC       list.lo
  CC       xmlIO.lo
xmlIO.c:1450:52: error: use of undeclared identifier 'LZMA_OK'
    ret =  (__libxml2_xzclose((xzFile) context) == LZMA_OK ) ? 0 : -1;
1 error generated.
make[2]: *** [xmlIO.lo] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers.  Check the mkmf.log file for more details.  You may
need configuration options.

Provided configuration options:
/Users/admin/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/mini_portile2-2.1.0/lib/mini_portile2/mini_portile.rb:366:in `block in execute': Failed to complete compile task (RuntimeError)
	from /Users/admin/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/mini_portile2-2.1.0/lib/mini_portile2/mini_portile.rb:337:in `chdir'
	from /Users/admin/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/mini_portile2-2.1.0/lib/mini_portile2/mini_portile.rb:337:in `execute'
	from /Users/admin/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/mini_portile2-2.1.0/lib/mini_portile2/mini_portile.rb:111:in `compile'
	from /Users/admin/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/mini_portile2-2.1.0/lib/mini_portile2/mini_portile.rb:150:in `cook'
	from extconf.rb:365:in `block (2 levels) in process_recipe'
	from extconf.rb:258:in `block in chdir_for_build'
	from extconf.rb:257:in `chdir'
	from extconf.rb:257:in `chdir_for_build'
	from extconf.rb:364:in `block in process_recipe'
	from extconf.rb:263:in `tap'
	from extconf.rb:263:in `process_recipe'
	from extconf.rb:556:in `<main>'

To see why this extension failed to compile, please check the mkmf.log which can be found here:


extconf failed, exit code 1

Gem files will remain installed in /Users/admin/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/nokogiri- for inspection.
Results logged to /Users/admin/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/extensions/x86_64-darwin-15/2.3.0-static/nokogiri-

But after few experiments with installing and manipulation depends libraries libxml2 and libxslt, that give me nothing. I found really simple solution. You need to open your terminal and execute follow commands:

xcode-select --install

Xcode Command Line Tools contains tools and libraries from Apple for developing software on macOS. And right after that try to install nokogiri:

gem install nokogiri

Found the solution on the stackoverlow.

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