Jambunathan K wrote: > When compiling with package manager, the compilation happens from within > a running Emacs session and very likely the "old" Org files are already > loaded in to the runtime "inadvertently" by the user either by looking > at the org agenda for the day or may be by just viewing an Org file or > by the plain old (require 'org-whatever) out of habit in .emacs.
There's your problem. The only way to reliably compile, especially something where an old version might already be loaded, is to use a fresh Emacs instance. There's no reason the "package manager" could not spawn a separate Emacs in batch-mode as a sub-job to do the compilation. cc-mode tries to have some voodoo to get around this, but please, please don't go down that road. I guess nobody ever expected the package manager to be used to load a different version of something that was already in Emacs.