Context:
- I have an application that makes heavy use of the GSL library and its Ruby bindings.
- I'd like to deploy the app to Heroku. I'm very new to programming in general, much less deployment, and Heroku is very simple to use, especially for Rails apps.
- I have GSL installed on my laptop. I am using the 'gsl' gem.
The Problem:
- The gem requires that the GSL library already be installed.
- GSL is not already installed in the Heroku environment.
So, unsurprisingly, I get this error from Heroku after I
git push heroku master-----> Heroku receiving push -----> Removing .DS_Store files -----> Ruby/Rails app detected -----> Installing dependencies using Bundler version 1.2.0.rc Running: bundle install --without development:test --path vendor/bundle --binstubs bin/ --deployment ... Installing gsl (1.14.7) with native extensions Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension. /usr/local/bin/ruby extconf.rb checking gsl version... *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. Provided configuration options: --with-opt-dir --without-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=/usr/local/bin/ruby extconf.rb:237:in `rescue in <main>': Check GSL>=0.9.4 is installed, and the command "gsl-config" is in search path. (RuntimeError) from extconf.rb:138:in `<main>'
The (Probable) Solution:
- It seems that working with Heroku's buildpacks is the likely route. This (packing binary buildpack dependencies) seems promising.
- I just don't understand what is going on in the tutorial, or how to use vulcan.
What I am hoping for:
- An easy-to-follow explanation of how to make the GSL library available to my application on Heroku.
Thank you so much!!
