Gem::Ext::Builderror: Error: Failed to Build Gem Native Extension. on Cenos 6.5

Gem::Ext::BuildError: ERROR: Failed to build gem native extension. on CenOS 6.5

Ruby 2.4 is very new. In fact, it was released only 3 days ago.

Since there are several impirtant internal changes in Ruby 2.4, it is quite likely that many gems (and Redmine itself) are not yet compatible with this version of Ruby.

From your error message, it does indeed seem that the JSON gem needs to be adapted in order to handle some changes in Ruby 2.4 regarding whole numbers.

You should use an older version of Ruby for now, e.g. Ruby 2.3.3. As you can see on http://www.redmine.org/projects/redmine/wiki/RedmineInstall#Ruby-interpreter, Redmine requires specific Ruby versions depending on the version of Redmine.

Gem::Ext::BuildError: ERROR: Failed to build gem native extension. - CentOS 6.5

checking for libpq-fe.h... no

You need the Postgresql development libraries.

Try:

yum install postgresql-devel

or whatever is specific to your OS.

Gem::Ext::BuildError: ERROR: Failed to build gem native extension trying to install postgresql

Because you're using the yum package manager, the package name is wrong. libpq-dev is the package name for the apt package manager. Try installing postgresql-libs. If that doesn't work, try postgresql-devel.

bcrypt-ruby 3.1.2 Gem::Ext::BuildError: ERROR: Failed to build gem native extension in OSX

When upgrading to Ruby 2.1.x in OS X El Capitan:
For some of the native extensions to build you need to make sure that the coreutils package is installed.

To do this run:

brew install coreutils

This could also cause similar failures for raindrops, pg, kgio, http_parser, fast-stemmer, unf_ext, ffi, debug-inspector, and nokogiri

Gem::Ext::BuildError: ERROR: Failed to build gem native extension for Puma Gem

You need homebrew and openssl. Run brew install openssl and then
bundle config build.puma --with-opt-dir=/usr/local/opt/openssl

Then running bundle install should work.

Relevant issue: https://github.com/puma/puma/issues/718

Error in installing json 1.8.3 with ruby 2.4.0 on Ubuntu

I think you can solve your problem as:

sudo apt-get install libgmp3-dev

and if above command didn't solve your system, you can try to install this command:

sudo apt-get install libgmp-dev

You can refer at json-1.8.3 Gem::Ext::BuildError

Because your ruby version is 2.4.0.The ruby version is not compatible with json 1.8.3. You can try add this line in your Gemfile:

gem 'json', github: 'flori/json', branch: 'v1.8'

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