[libmediaart] meson: Fix library versioning

[Carlos Garnacho <carlosg src gnome org>]

commit 5ec981480746137c40f3a873af8f0e915dcbf376
Author: Jan Alexander Steffens (heftig) <jan steffens gmail com>
Date:   Wed Aug 9 21:01:49 2017 +0200

    meson: Fix library versioning
    
    https://bugzilla.gnome.org/show_bug.cgi?id=786067

 libmediaart/meson.build |    2 ++
 meson.build             |    6 ++++++
 2 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/libmediaart/meson.build b/libmediaart/meson.build
index a33fb39..8b97f12 100644
--- a/libmediaart/meson.build
+++ b/libmediaart/meson.build
@@ -28,6 +28,8 @@ libmediaart_dependencies = [glib, gio_unix, gobject, image_library]
 libmediaart = shared_library(
   'mediaart-' + libmediaart_api_version,
   libmediaart_sources, marshal[0], marshal[1],
+  version: libmediaart_ltversion,
+  soversion: libmediaart_soversion,
   dependencies: libmediaart_dependencies,
   c_args: libmediaart_cflags + visibility_cflags,
   include_directories: root_inc,
diff --git a/meson.build b/meson.build
index 79e814a..118588e 100644
--- a/meson.build
+++ b/meson.build
@@ -9,6 +9,12 @@ cc = meson.get_compiler('c')
 
 # This is the X.Y used in -lliblibmediaart-FOO-X.Y
 libmediaart_api_version = '2.0'
+libmediaart_soversion = 0
+libmediaart_interface_age = 0
+
+version_array = meson.project_version().split('.')
+current = 100 * version_array[1].to_int() + version_array[2].to_int()
+libmediaart_ltversion = '@0@.@1@.@2@'.format(libmediaart_soversion, current, libmediaart_interface_age)
 
 glib_required = '2.38.0'