Re: Retrieving the "include" directory for Emacs Modules

[Björn Bidar]

Stefan Monnier via Users list for the GNU Emacs text editor
<help-gnu-emacs@gnu.org> writes:

>> Those under /usr/lib are looked in by the relevant compilers (they are
>> include directories private to those compilers, hard-coded into them
>> when they are built).  Those under /usr/share are private to the
>> relevant packages, and are either examples or test suites (thus AFAIU
>> unrelated to the issue at hand here).  Those under /usr/src are what I
>> mentioned: private headers needed to build a package.
>
> Indeed, they each have their own reason to exist.  And this is in Debian,
> i.e. a distribution which is very careful to install things in the one
> central place where they belong.

I'm on openSUSE which is entirely unrelated same policy. In fact all
Unixes have such a policy (macOS doesn't count in this context).

> Other relevant cases will look very different:
> Emacs.app, AppImages, Snap packages, etc...

Who are proprietary platforms such as Snap relevant to Emacs? For these
where a sandbox is involved such as Snap or Flatpak it is not possible
to interact with external resources without breaking the security of the
sandbox.

But anyway this is going off-topic.