ERROR: Failed to build gem native extension (json-1.8.2) when installing

[jmuheim]

I can't install backup gem on my UNIX server:

[hmktnt@lepus ~]$ gem install backup
Building native extensions.  This could take a while...
ERROR:  Error installing backup:
	ERROR: Failed to build gem native extension.

    current directory: /home/hmktnt/.gem/ruby/2.4.0/gems/json-1.8.2/ext/json/ext/generator
/package/host/localhost/ruby-2.4.1/bin/ruby -r ./siteconf20170725-22241-1071ukr.rb extconf.rb
creating Makefile

current directory: /home/hmktnt/.gem/ruby/2.4.0/gems/json-1.8.2/ext/json/ext/generator
make "DESTDIR=" clean

current directory: /home/hmktnt/.gem/ruby/2.4.0/gems/json-1.8.2/ext/json/ext/generator
make "DESTDIR="
compiling generator.c
generator.c: In function ‘generate_json’:
generator.c:867: error: ‘rb_cFixnum’ undeclared (first use in this function)
generator.c:867: error: (Each undeclared identifier is reported only once
generator.c:867: error: for each function it appears in.)
generator.c:869: error: ‘rb_cBignum’ undeclared (first use in this function)
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"
make: *** [generator.o] Error 1

make failed, exit code 2

Gem files will remain installed in /home/hmktnt/.gem/ruby/2.4.0/gems/json-1.8.2 for inspection.
Results logged to /home/hmktnt/.gem/ruby/2.4.0/extensions/x86_64-linux/2.4.0-static/json-1.8.2/gem_make.out

I tried it with a newer json gem:

[hmktnt@lepus ~]$ gem install json -v '1.8.6'
Fetching: json-1.8.6.gem (100%)
Building native extensions.  This could take a while...
Successfully installed json-1.8.6
1 gem installed

But this didn't help. Any idea on how to proceed?

[shlima]

Use 5.0.0.beta.1 for Ruby 2.4

[jmuheim]

Use 5.0.0.beta.1 for Ruby 2.4

How can I do this?

[shlima]

gem install backup -v5.0.0.beta.1

[narutosanjiv]

Version 5.0.0.beta.1 is compatible with Ruby 2.4

[rwehresmann]

With Ruby 2.4.1, use Backup version 5.0.0.beta.1 solved the issue.

[shershennm]

Is this version (5.0.0.beta.1) stable and suitable to use on production?

[stuartellis]

@shershennm - I would suggest that you treat Beta 1 in that the same way as a Release Candidate. There may be bugs or breakages. Obviously, people reporting successful use of the Beta will give us more confidence, and help us get it to a stable release.

[mldoscar]

gem install backup -v5.0.0.beta.1

that worked for me on ruby 2.4.0

[stuartellis]

Thank you @mldoscar - please let us know if you have any issues.

[RandyBastian]

@shlima , thanks. also work for ruby 2.5.0

[unRARed]

Can confirm this also works for Ruby 2.5.1. Don't forget to change # Backup v4.x Configuration to # Backup v5.x Configuration in your ./Backup/config.rb.

[tombruijn]

Closing issue. It's in a dependency that's upgrade in v5.

[JorgeLAB]

Thanks,
gem install backup -v5.0.0.beta.1
worked with Ruby 2.7