puma gem - Failed to build gem native extension

Question

I was getting the following error while installing puma gem

    $ gem install puma
    Fetching: puma-2.11.2.gem (100%)
    Building native extensions.  This coul         


        

Answer 1

I've run into a similar error under Mac OS X 10.10.

Details in the mkmf.log showed that this was due to:

Agreeing to the Xcode/iOS license requires admin privileges, please re-run as root via sudo.

Which was caused by the installation of a new version of Xcode. This was easily solved by accepting the Xcode license from Apple:

sudo xcodebuild -license

Hope this might help someone in the future ;-)

Answer 2

libssl1.0-dev installing helped to me. Try

apt-get install libssl1.0-dev

and then

gem install puma

Answer 3

Have you tried

DISABLE_SSL=true gem install puma

Specify the version if you have version specific requirement like:

DISABLE_SSL=true gem install puma -v version_number

Answer 4

I had similar issue on OSx El Capitan. In order to fix the issue I had to do:

brew install openssl
brew link --force openssl

Answer 5

Try the following

gem install puma -- --with-cppflags=-I/usr/local/opt/openssl/include
bundle install

You can also specify the gem version, like the following:

gem install puma -v '2.11.3' -- --with-cppflags=-I/usr/local/opt/openssl/include

Answer 6

I had to do this beforehand: sudo apt-get install libgmp3-dev