Windows: Rails: Error Installing Bson_Ext

Ruby bson_ext gem is not installing in windows

the #include in the file cbson.c should be changed into #include. Then you need to build the your own gem and install it locally

Following thread describes it perfectly:

windows: rails: error installing bson_ext

Why do I get an error installing bson_ext?

Not sure why your make is not using the correct install. But it's easy to do a quick fix:

sudo ln -s /usr/bin/install /bin/install

This will link the existing install into /bin and should enable make to continue.

MongoMapper and bson_ext problem

The problem is: the bson_ext gem version and the mongo gem version need to match, also, mongo_mapper isn't ready for mongo-1.0.1 yet, so the versions of the mongo and bson_ext gems you should be using are 1.0 for each, respectively.

so, do the following:

gem install mongo -v=1.0 --no-ri --no-rdoc && \
gem install bson_ext -v=1.0 --no-ri --no-rdoc

then for Rails 2.x in your config/environment.rb do:

config.gem 'mongo', :version => '1.0'
config.gem 'bson_ext', :version => '1.0'

or for Rails 3, in your Gemfile:

gem 'mongo', '1.0'
gem 'bson_ext', '1.0'

bson_ext gem install fails on macOS

This worked for me on MacOS 11.2.

gem install bson_ext -v '1.5.1' --source 'https://rubygems.org/' -- --with-cflags="-Wno-error=implicit-function-declaration"

gem install bson_ext issues

The issue is because a) the version of mongo and bson_ext must match and b) there must not be any other bson_ext version installed.

The comments on this issue helped me solved the issue.

Run: gem list | grep -w 'bson\|bson_ext\|mongo' which will print out all the versions. It should look like:

bson (1.9.2)
bson_ext (1.9.2)
mongo (1.9.2)

And not like:

bson (2.3.0, 1.10.2, 1.9.2)
bson_ext (1.10.2, 1.9.2)
mongo (1.10.2, 1.9.2)

If so, (de)install versions as necessary.

Ruby mysql2 gem, cannot build on Windows 7

To install and compile extensions sometimes you need libraries and headers of the dependencies. In this case, you need MySQL headers and libraries to properly compile.

Assuming you downloaded Ruby from RubyInstaller and also installed the Development Kit and followed it's installation instructions, to successfuly install mysql2 gem I recommend you read this answer in our Troubleshooting page:

1. Download MySQL Connector/C
2. Extract into a path without spaces
3. When installing mysql2 gem, provide the additional options (gem install mysql2 -v 0.2.10 -- --with-mysql-include=... --with-mysql-lib...)

Provide for --with-mysql-include option the path to the include directory of MySQL Connector/C. The same for --with-mysql-lib but this time point to lib directory.

Don't forget to copy libmysql.dll to your Ruby bin directory.

Hope this helps.

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