Use C-Buildpack if you need Heroku to execute a C application.

NOTE: The C app being deployed with this buildpack needs a makefile that will specify the build rules of the project.

$> heroku create myapp_name -s cedar
$> heroku config:add BUILDPACK_URL=https://github.com/atris/heroku-buildpack-C.git

$> git push heroku master

-----> Heroku receiving push
-----> Fetching custom git buildpack... done
-----> C app detected
-----> makefile found
gcc -o greesc1 greesc1.c
-----> Compilation done
-----> Discovering process types
Procfile declares types -> (none)
-----> Compiled slug size: 4K
-----> Launching... done, v9