File libtorrent-rasterbar-fix_library_version.patch of Package libtorrent-rasterbar

From: Luigi Baldoni <aloisio@gmx.com>
Date: 2020-09-09 16:22:42 +0200
Subject: Avoid soname/library version confusion
References: gh#arvidn/libtorrent#4927

Upstream has changed the version format in 2.0 and this has percolated
down to the cmake scripts in 1.2.x. This patch makes it match autotools
behaviour.

Index: libtorrent-rasterbar-1.2.10/CMakeLists.txt
===================================================================
--- libtorrent-rasterbar-1.2.10.orig/CMakeLists.txt
+++ libtorrent-rasterbar-1.2.10/CMakeLists.txt
@@ -10,6 +10,7 @@ project(libtorrent
 	VERSION ${VER_MAJOR}.${VER_MINOR}.${VER_TINY}
 )
 set (SOVERSION "10")
+set (SOVERSION_FULL "${SOVERSION}.0.0")
 
 include(GNUInstallDirs)
 include(GeneratePkgConfig)
@@ -555,7 +556,7 @@ set_target_properties(torrent-rasterbar
 	PROPERTIES
 		CXX_VISIBILITY_PRESET "hidden"
 		VISIBILITY_INLINES_HIDDEN "true"
-		VERSION ${PROJECT_VERSION}
+		VERSION ${SOVERSION_FULL}
 		SOVERSION ${SOVERSION}
 )