- added version handling support for cmake integration (facebookarchi…

…ve#132)

slikenet-config-version.cmake.in

@@ -0,0 +1,36 @@
+# Copyright (c) 2019, SLikeSoft UG (haftungsbeschränkt)
+#
+# This file is  licensed under the MIT-style license found in the license.txt
+# file in the root directory of this source tree.
+
+set(PACKAGE_VERSION @SLikeNet_VERSION@)
+
+if("${PACKAGE_FIND_VERSION_MAJOR}" EQUAL "@SLikeNet_VERSION_MAJOR@")
+   if("${PACKAGE_FIND_VERSION_MINOR}" EQUAL "@SLikeNet_VERSION_MINOR@")
+      if("${PACKAGE_FIND_VERSION_PATCH}" EQUAL "@SLikeNet_VERSION_PATCH@")
+         # exactly the required version
+         set(PACKAGE_VERSION_EXACT TRUE)
+      else()
+         # requested x.y.z with x.y.z1 being installed where z1 is != z
+         # since it's just a patch level change, the version is fully compatible
+         set(PACKAGE_VERSION_COMPATIBLE TRUE)
+      endif()
+   elseif("${PACKAGE_FIND_VERSION_MINOR}" LESS "@SLikeNet_VERSION_MINOR@")
+      # requested x.y.z with x.y1.z1 being installed where y1 is != y
+      # the version is compatible, if y1 is > y
+      if("${PACKAGE_FIND_VERSION_MINOR}" LESS "@SLikeNet_VERSION_MINOR@")
+         set(PACKAGE_VERSION_COMPATIBLE TRUE)
+      else()
+         set(PACKAGE_VERSION_UNSUITABLE TRUE)
+      endif()
+   else()
+      # requested was x.y.z while we have installed x.y1.z with y1 < y -> not compatbile
+      set(PACKAGE_VERSION_UNSUITABLE TRUE)
+   endif()
+elseif("$(PACKAGE_FIND_VERSION_MAJOR)" EQUAL 1 AND "@SLikeNet_VERSION_MAJOR@" EQUAL 0)
+   # version 0.x.y was requested while we have 1.x.y installed - 1.x.y is backwards compatible with 0.x.y
+   set(PACKAGE_VERSION_COMPATIBLE TRUE)
+else()
+   # requested was x.y.z while we have installed x1.y.z with x1 != x -> not compatible
+   set(PACKAGE_VERSION_UNSUITABLE TRUE)
+endif()