ddollar/heroku-buildpack-apt — pull request #7 by kainz (2014-11-20 01:57:40+00:00)
Title: Fix up envvar exports for the apt buildpack -- fixes C/C++ compiling.

* Avoid adding extra : characters to the end of gcc paths. This will
cause gcc to use the current directory in system include paths, which
breaks C #include vs #include "file" semantics.
* Also, write an export file for buildpack-multi to pass the exported
envvars to the next buildpack.