[ovs-git] [openvswitch/ovs] f24753: libX: add new release / version info tags

[GitHub]

  Branch: refs/heads/branch-2.7
  Home:   https://github.com/openvswitch/ovs
  Commit: f247538caea38a79b4454e9d7dc5d7d356920287
      https://github.com/openvswitch/ovs/commit/f247538caea38a79b4454e9d7dc5d7d356920287
  Author: Aaron Conole <aconole at redhat.com>
  Date:   2017-01-18 (Wed, 18 Jan 2017)

  Changed paths:
    M Documentation/automake.mk
    M Documentation/internals/contributing/coding-style.rst
    M Documentation/internals/contributing/index.rst
    A Documentation/internals/contributing/libopenvswitch-abi.rst
    M configure.ac
    M lib/automake.mk
    M m4/openvswitch.m4
    M ofproto/automake.mk
    M ovn/lib/automake.mk
    M ovsdb/automake.mk
    M vtep/automake.mk

  Log Message:
  -----------
  libX: add new release / version info tags

This commit uses the $PACKAGE_VERSION automake variable to construct a
release and version info combination which sets the library name to be:

   libfoo-$(OVS_MAJOR_VERSION).so.$(OVS_MINOR_VERSION).0.$(OVS_MICRO_VERSION)

where formerly, it was always:

   libfoo.so.1.0.0

This allows releases of Open vSwitch libraries to reflect which specific
versions they came with, and sets up a psuedo ABI-versioning scheme.  In
this fashion, future releases of Open vSwitch could be installed
alongside older releases, allowing 3rd party utilities linked against
previous versions to continue to function.

ex:

$ ldd /path/to/utility
	linux-vdso.so.1 (0x00007ffe92cf6000)
	libopenvswitch-2.so.6 => /lib64/libopenvswitch-2.so.6 (0x00007f733b7a3000)
	libssl.so.10 => /lib64/libssl.so.10 (0x00007f733b530000)
...

Note the library name and version information.

Signed-off-by: Aaron Conole <aconole at redhat.com>
Signed-off-by: Ben Pfaff <blp at ovn.org>