cmake: updated exact version check semantics for find_package(Orocos-RTT)

Every version that has the same major version number and at least the
requested minor version number is considered as compatible. Nothing changed here.

If an exact version of RTT is requested, the script also accepts it if the patch version
or the minor version was not specified. If they are, they have to match.

Signed-off-by: Johannes Meyer <[email protected]>

Author: meyerj

orocos-rtt-config-version.cmake.in

@@ -1,6 +1,6 @@
 ########################################################################################################################
 #
-# CMake version file for the OrocosRTT package.
+# CMake version file for the Orocos-RTT package.
 # This script checks whether the requested version matches exactly or is compatible with the installed package version.
 #
 # This script sets the following variables:
@@ -14,13 +14,19 @@
 set(PACKAGE_VERSION @RTT_VERSION@)
 
 # Exact match test
-if(@RTT_VERSION@ VERSION_EQUAL PACKAGE_FIND_VERSION)
-  set(PACKAGE_VERSION_EXACT TRUE)
+if(PACKAGE_FIND_VERSION_MAJOR EQUAL "@RTT_VERSION_MAJOR@")
+  if(PACKAGE_FIND_VERSION_MINOR EQUAL "@RTT_VERSION_MINOR@" OR
+     PACKAGE_FIND_VERSION_COUNT LESS "2")
+    if(PACKAGE_FIND_VERSION_PATCH EQUAL "@RTT_VERSION_PATCH@" OR
+       PACKAGE_FIND_VERSION_COUNT LESS "3")
+      set(PACKAGE_VERSION_EXACT 1)
+    endif()
+  endif()
 endif()
 
 # Compatible version test
-if(NOT @RTT_VERSION@       VERSION_LESS PACKAGE_FIND_VERSION AND    # Installed version can't be lower than requested one
-       @RTT_VERSION_MAJOR@ EQUAL        PACKAGE_FIND_VERSION_MAJOR) # ...and major versions must coincide
+if(NOT "@RTT_VERSION@"       VERSION_LESS PACKAGE_FIND_VERSION AND    # Installed version can't be lower than requested one
+       "@RTT_VERSION_MAJOR@" EQUAL        PACKAGE_FIND_VERSION_MAJOR) # ...and major versions must coincide
   set(PACKAGE_VERSION_COMPATIBLE TRUE)
 endif()