I am developing a python app on Heroku server (Heroku-16 stack) using Django framework. I would like to use gfortran on the server. However, this stack version of Heroku does not include a C compiler as stated in https://devcenter.heroku.com/articles/stack-packages
Can I install a buildpack to overcome this problem or do I have to downgrade to cedar-14 version which includes GCC?
In case anyone is interested, I have contacted the Heroku Support team and they have replied with three ways of tackling such problems.
1) Use the apt buildpack to install gfortran such as this. However, this buildpack is not officially supported so its usefulness may vary depending on the application.
2) Secondly, use build manifest file which also allows to install additional Ubuntu packages.
3) Lastly, build the app as a docker image which would allow to pull in the desired packages and then run the image using the Heroku Container Runtime
