[Poll] On Linux, what should we commonly use as sub-directory name for D?

[Marco Leise via Digitalmars-d]

Am Thu, 12 Nov 2015 10:26:54 +0000
schrieb Marc Schütz <schuetzm at gmx.net>:

> I'm interested in this topic, too. Has there been a conclusion as 
> to distributions should install includes and libraries of 
> different compilers (and versions), which sonames to use, etc?

The shared library topic was too hot back then and DMD I think
is still the only compiler which does shared linking out of
the box in a default installation. If you ask about only
Phobos, I would just use the soname provided by upstream:
  libphobos2.so.0.69.1
  libphobos2.so.0.69   -> libphobos2.so.0.69.1
  libphobos2.so        -> libphobos2.so.0.69.1
(The convention for the first symlink may differ per
distribution). These files should be installed into your
system's shared library lookup path, so that dynamically linked
executables can be run on other systems. For example you could
compile a program on your machine and ssh copy it to a remote
server running in a low memory VM where compilation would be
impossible. If that use case works, you are doing it right. ;)

As for additional libraries, you are in trouble. Not only is
it common to have 32-bit+64-bit libraries, but we also have
ABI differences between three popular D compilers and
potentially each new release of Dlang. So if you ask where to
put libraries I'd say somewhere, where they are separated by
architecture, compiler and compiler version. While this scheme
works for Gentoo, I had to bend the rules quite liberally to
make it happen and these packages have no chance of getting
into the main tree.

The alternative is to always use one compiler (e.g. DMD) and
update all libraries in sync with a DMD update. Then you can
install these libraries to the standard path as well. This is
practically what is done in the C/C++ world. ABI breakages are
far and in-between there but do happen like just now with the
change to use a namespace prefix for the mangling of "string".

(For includes see previous post and discussion.)

-- 
Marco