Error installing json

[willybc]

`$ gem install json -v 1.8

ERROR: Error installing json:
ERROR: Failed to build gem native extension.

current directory: C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/json-1.8.0/ext/json/ext/generator

C:/Ruby23-x64/bin/ruby.exe -r ./siteconf20170307-8672-16qswbm.rb extconf.rb
creating Makefile

current directory: C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/json-1.8.0/ext/json/ext/generator
make "DESTDIR=" clean
"make" no se reconoce como un comando interno o externo,
programa o archivo por lotes ejecutable.

current directory: C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/json-1.8.0/ext/json/ext/generator
make "DESTDIR="
"make" no se reconoce como un comando interno o externo,
programa o archivo por lotes ejecutable.

make failed, exit code 1

Gem files will remain installed in C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/json-1.8.0 for inspection.
Results logged to C:/Ruby23-x64/lib/ruby/gems/2.3.0/extensions/x64-mingw32/2.3.0/json-1.8.0/gem_make.out
Temporarily enhancing PATH to include DevKit...
Building native extensions. This could take a while...

`

`Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

current directory:
C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/json-1.8.6/ext/json/ext/generator
C:/Ruby23-x64/bin/ruby.exe -r ./siteconf20170307-13780-pxrhll.rb extconf.rb
creating Makefile

current directory:
C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/json-1.8.6/ext/json/ext/generator
make "DESTDIR=" clean
"make" no se reconoce como un comando interno o externo,
programa o archivo por lotes ejecutable.

current directory:
C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/json-1.8.6/ext/json/ext/generator
make "DESTDIR="
"make" no se reconoce como un comando interno o externo,
programa o archivo por lotes ejecutable.

make failed, exit code 1

Gem files will remain installed in
C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/json-1.8.6 for inspection.
Results logged to
C:/Ruby23-x64/lib/ruby/gems/2.3.0/extensions/x64-mingw32/2.3.0/json-1.8.6/gem_make.out

An error occurred while installing json (1.8.6), and Bundler cannot continue.
Make sure that gem install json -v '1.8.6' succeeds before bundling.

`

[djangofan]

I'm having almost the same error. I'm on Windows10. I installed Ruby 2.3.3 using Scoop. My Gemfile includes these items:

gem 'httparty'
gem 'rspec'
gem 'cucumber', '>=2.4.0'
gem 'rake'
gem 'json', '~> 1.8.6'
gem 'parallel_cucumber'
gem 'report_builder'

And my error looks like thsi:

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
current directory:
/scoop/apps/ruby/current/lib/ruby/gems/2.3.0/gems/json-1.8.6/ext/json/ext/generator
/scoop/apps/ruby/current/bin/ruby.exe -r
./siteconf20170316-5624-zskt8x.rb extconf.rb
creating Makefile
extconf failed, exit code 1
Gem files will remain installed in
/scoop/apps/ruby/current/lib/ruby/gems/2.3.0/gems/json-1.8.6
for inspection.
Results logged to
/scoop/apps/ruby/current/lib/ruby/gems/2.3.0/extensions/x64-mingw32/2.3.0/json-1.8.6/gem_make.out
An error occurred while installing json (1.8.6), and Bundler cannot continue.
Make sure that `gem install json -v '1.8.6'` succeeds before bundling.

[testwts]

I'm getting same problem with below error

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

current directory: /home/user/.rvm/gems/ruby-2.2.2/gems/json-1.8.1/ext/json/ext/generator

/home/user/.rvm/rubies/ruby-2.2.2/bin/ruby -r ./siteconf20170404-3765-1oh8j0o.rb extconf.rb
creating Makefile

current directory: /home/user/.rvm/gems/ruby-2.2.2/gems/json-1.8.1/ext/json/ext/generator
make "DESTDIR=" clean

current directory: /home/user/.rvm/gems/ruby-2.2.2/gems/json-1.8.1/ext/json/ext/generator
make "DESTDIR="
compiling generator.c
In file included from generator.c:1:0:
../fbuffer/fbuffer.h: In function ‘fbuffer_to_s’:
../fbuffer/fbuffer.h:175:47: error: macro "rb_str_new" requires 2 arguments, but only 1 given
VALUE result = rb_str_new(FBUFFER_PAIR(fb));
^
../fbuffer/fbuffer.h:175:20: warning: initialization makes integer from pointer without a cast [-Wint-conversion]
VALUE result = rb_str_new(FBUFFER_PAIR(fb));
^
Makefile:237: recipe for target 'generator.o' failed
make: *** [generator.o] Error 1

make failed, exit code 2

Gem files will remain installed in /home/user/.rvm/gems/ruby-2.2.2/gems/json-1.8.1 for inspection.
Results logged to /home/user/.rvm/gems/ruby-2.2.2/extensions/x86_64-linux/2.2.0/json-1.8.1/gem_make.out

[tapickell]

On Linux Mint, this builds fine on OSX

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    current directory: /home/pklx/.rvm/gems/ruby-2.4.0/gems/json-1.8.3/ext/json/ext/generator
/home/pklx/.rvm/rubies/ruby-2.4.0/bin/ruby -r ./siteconf20170410-302-ayxtjd.rb extconf.rb
creating Makefile

current directory: /home/pklx/.rvm/gems/ruby-2.4.0/gems/json-1.8.3/ext/json/ext/generator
make "DESTDIR=" clean

current directory: /home/pklx/.rvm/gems/ruby-2.4.0/gems/json-1.8.3/ext/json/ext/generator
make "DESTDIR="
compiling generator.c
generator.c: In function ‘generate_json’:
generator.c:861:25: error: ‘rb_cFixnum’ undeclared (first use in this function)
     } else if (klass == rb_cFixnum) {
                         ^
generator.c:861:25: note: each undeclared identifier is reported only once for each function it appears in
generator.c:863:25: error: ‘rb_cBignum’ undeclared (first use in this function)
     } else if (klass == rb_cBignum) {
                         ^
generator.c: At top level:
cc1: warning: unrecognized command line option ‘-Wno-self-assign’
cc1: warning: unrecognized command line option ‘-Wno-constant-logical-operand’
cc1: warning: unrecognized command line option ‘-Wno-parentheses-equality’
cc1: warning: unrecognized command line option ‘-Wno-tautological-compare’
Makefile:241: recipe for target 'generator.o' failed
make: *** [generator.o] Error 1

make failed, exit code 2

Gem files will remain installed in /home/pklx/.rvm/gems/ruby-2.4.0/gems/json-1.8.3 for inspection.
Results logged to /home/pklx/.rvm/gems/ruby-2.4.0/extensions/x86_64-linux/2.4.0/json-1.8.3/gem_make.out

An error occurred while installing json (1.8.3), and Bundler cannot continue.
Make sure that `gem install json -v '1.8.3'` succeeds before bundling.

[MSP-Greg]

@willybc @djangofan @testwts

The gem will install with RubyInstaller2 (or similar) builds. Appveyor results here.

I believe the ragel package needs to be installed, which may not be available with the older RubyInstaller build system.

[chaonan99]

Is there a workaround to this problem? My problem is the same @tapickell .

[chaonan99]

Ok, I see in #303 issue that as I'm using ruby 2.4, json 1.8 is not compatible. So I just run gem install json and the problem goes away.

[MeetChavda]

Still not working, try this...

$ bundle update json
$ bundle install