Can't use rvm install rails 5 gem

Question

I tried to create gemset rails500 by ruby-2.3.1 and I got :

Using /Users/ChamperWu/.rvm/gems/ruby-2.3.1 with gemset rails500
jiaqideMacBook-Pro:unispot ChamperWu$ gem install rails
Fetching: i18n-0.7.0.gem (100%)
Successfully installed i18n-0.7.0
Fetching: thread_safe-0.3.5.gem (100%)
Successfully installed thread_safe-0.3.5
Fetching: tzinfo-1.2.2.gem (100%)
Successfully installed tzinfo-1.2.2
Fetching: concurrent-ruby-1.0.2.gem (100%)
Successfully installed concurrent-ruby-1.0.2
Fetching: activesupport-5.0.0.1.gem (100%)
Successfully installed activesupport-5.0.0.1
Fetching: rack-2.0.1.gem (100%)
Successfully installed rack-2.0.1
Fetching: rack-test-0.6.3.gem (100%)
Successfully installed rack-test-0.6.3
Fetching: mini_portile2-2.1.0.gem (100%)
Successfully installed mini_portile2-2.1.0
Fetching: nokogiri-1.6.8.1.gem (100%)
Building native extensions.  This could take a while...
ERROR:  Error installing rails:
  ERROR: Failed to build gem native extension.

    current directory: /Users/ChamperWu/.rvm/gems/ruby-2.3.1@rails500/gems/nokogiri-1.6.8.1/ext/nokogiri
/Users/ChamperWu/.rvm/rubies/ruby-2.3.1/bin/ruby -r ./siteconf20161026-41490-k9it32.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 using --with-opt-* flags... yes
************************************************************************
IMPORTANT NOTICE:

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
        [--with-xml2-config=/path/to/xml2-config]
        [--with-xslt-config=/path/to/xslt-config]

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-darwin16.0.0/ports/libxml2/2.9.4... OK
Running 'configure' for libxml2 2.9.4... OK
Running 'compile' for libxml2 2.9.4... ERROR, review '/Users/ChamperWu/.rvm/gems/ruby-2.3.1@rails500/gems/nokogiri-1.6.8.1/ext/nokogiri/tmp/x86_64-apple-darwin16.0.0/ports/libxml2/2.9.4/compile.log'

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:
  --with-opt-dir
  --with-opt-include
  --without-opt-include=${opt-dir}/include
  --with-opt-lib
  --without-opt-lib=${opt-dir}/lib
  --with-make-prog
  --without-make-prog
  --srcdir=.
  --curdir
  --ruby=/Users/ChamperWu/.rvm/rubies/ruby-2.3.1/bin/$(RUBY_BASE_NAME)
  --help
  --clean
  --use-system-libraries
  --enable-static
  --disable-static
  --with-zlib-dir
  --without-zlib-dir
  --with-zlib-include
  --without-zlib-include=${zlib-dir}/include
  --with-zlib-lib
  --without-zlib-lib=${zlib-dir}/lib
  --enable-cross-build
  --disable-cross-build
/Users/ChamperWu/.rvm/gems/ruby-2.3.1@rails500/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/ChamperWu/.rvm/gems/ruby-2.3.1@rails500/gems/mini_portile2-2.1.0/lib/mini_portile2/mini_portile.rb:337:in chdir' from /Users/ChamperWu/.rvm/gems/ruby-2.3.1@rails500/gems/mini_portile2-2.1.0/lib/mini_portile2/mini_portile.rb:337:in execute' from /Users/ChamperWu/.rvm/gems/ruby-2.3.1@rails500/gems/mini_portile2-2.1.0/lib/mini_portile2/mini_portile.rb:111:in compile' from /Users/ChamperWu/.rvm/gems/ruby-2.3.1@rails500/gems/mini_portile2-2.1.0/lib/mini_portile2/mini_portile.rb:150:in cook' from extconf.rb:365:inblock (2 levels) in process_recipe' from extconf.rb:258:in block in chdir_for_build' from extconf.rb:257:inchdir' from extconf.rb:257:in chdir_for_build' from extconf.rb:364:inblock in process_recipe' from extconf.rb:263:in tap' from extconf.rb:263:inprocess_recipe' from extconf.rb:556:in `'

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

  /Users/ChamperWu/.rvm/gems/ruby-2.3.1@rails500/extensions/x86_64-darwin-16/2.3.0/nokogiri-1.6.8.1/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /Users/ChamperWu/.rvm/gems/ruby-2.3.1@rails500/gems/nokogiri-1.6.8.1

for inspection. Results logged to /Users/ChamperWu/.rvm/gems/ruby-2.3.1@rails500/extensions/x86_64-darwin-16/2.3.0/nokogiri-1.6.8.1/gem_make.out

I tried to uninstall and install it again, but I got the same info

how can I fix it?

Answer 1

It might help:

brew uninstall xz

gem install nokogiri -v 1.6.8 or gem install rails (command you are running)