gem install rails : failed to build gem native extension

Question

I try to install rails recently

but got these errors

I tried some similar solution but not working

the answers before had already are too old to me right now

so please have a look if you're free:

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

current directory: /Users/apple/.rvm/gems/ruby-2.2.0/gems/nokogiri-
1.8.0/ext/nokogiri
/usr/local/opt/ruby/bin/ruby -r ./siteconf20170908-68164-1pf24m0.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 2.2.0
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
with the following patches applied:
- 0001-Fix-comparison-with-root-node-in-xmlXPathCmpNodes.patch
- 0002-Fix-XPointer-paths-beginning-with-range-to.patch
- 0003-Disallow-namespace-nodes-in-XPointer-ranges.patch

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-
darwin16.7.0/ports/libxml2/2.9.4... OK
Running git apply with /Users/apple/.rvm/gems/ruby-2.2.0/gems/nokogiri-
1.8.0/patches/libxml2/0001-Fix-comparison-with-root-node-in-
xmlXPathCmpNodes.patch... OK
Running git apply with /Users/apple/.rvm/gems/ruby-2.2.0/gems/nokogiri-
1.8.0/patches/libxml2/0002-Fix-XPointer-paths-beginning-with-range-
to.patch... OK
Running git apply with /Users/apple/.rvm/gems/ruby-2.2.0/gems/nokogiri-
1.8.0/patches/libxml2/0003-Disallow-namespace-nodes-in-XPointer-
ranges.patch... OK
Running 'configure' for libxml2 2.9.4... OK
Running 'compile' for libxml2 2.9.4... ERROR, review 
'/Users/apple/.rvm/gems/ruby-2.2.0/gems/nokogiri-
1.8.0/ext/nokogiri/tmp/x86_64-apple-
darwin16.7.0/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=/usr/local/Cellar/ruby/2.4.1_2/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
/usr/local/lib/ruby/gems/2.4.0/gems/mini_portile2-
2.2.0/lib/mini_portile2/mini_portile.rb:400:in `block in execute': 
Failed to complete compile task (RuntimeError)
from /usr/local/lib/ruby/gems/2.4.0/gems/mini_portile2-
2.2.0/lib/mini_portile2/mini_portile.rb:371:in `chdir'
from /usr/local/lib/ruby/gems/2.4.0/gems/mini_portile2-
2.2.0/lib/mini_portile2/mini_portile.rb:371:in `execute'
from /usr/local/lib/ruby/gems/2.4.0/gems/mini_portile2-
2.2.0/lib/mini_portile2/mini_portile.rb:114:in `compile'
from /usr/local/lib/ruby/gems/2.4.0/gems/mini_portile2-
2.2.0/lib/mini_portile2/mini_portile.rb:153:in `cook'
from extconf.rb:365:in `block (2 levels) in process_recipe'
from extconf.rb:257:in `block in chdir_for_build'
from extconf.rb:256:in `chdir'
from extconf.rb:256:in `chdir_for_build'
from extconf.rb:364:in `block in process_recipe'
from extconf.rb:262:in `tap'
from extconf.rb:262:in `process_recipe'
from extconf.rb:548:in `<main>'

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

/Users/apple/.rvm/gems/ruby-2.2.0/extensions/x86_64-darwin-
16/2.4.0/nokogiri-1.8.0/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /Users/apple/.rvm/gems/ruby-
2.2.0/gems/nokogiri-1.8.0 for inspection.
Results logged to /Users/apple/.rvm/gems/ruby-2.2.0/extensions/x86_64-
darwin-16/2.4.0/nokogiri-1.8.0/gem_make.out

ruby -v => ruby 2.4.1p111 (2017-03-22 revision 58053) [x86_64-darwin16]

git --version =>git version 2.14.1

Thanks all.

Answer 1

i've just experienced the same error, have you tried to run ridk from the command line? Is a tool that ships with Ruby and that let you install MSYS, which is necessary for Rails. Use ridk install and get both the Base installation and the dev toolchain, then retry to install Rails. It worked for me, hope this helps!