Fixes in version reporting

CMakeLists.txt

@@ -890,15 +890,20 @@ if(NOT VOLKGNSSSDR_FOUND)
         message(FATAL_ERROR "six - python 2 and 3 compatibility library required to build VOLK_GNSSSDR")
     endif()
 
+    set_package_properties(Python3 PROPERTIES
+        URL "https://www.python.org/"
+        PURPOSE "Required to build volk_gnsssdr."
+        TYPE REQUIRED
+    )
     if(Python3_FOUND)
         set_package_properties(Python3 PROPERTIES
-            URL "https://www.python.org/"
             DESCRIPTION "An interpreted, high-level, general-purpose programming language (found: ${Python3_VERSION})"
-            PURPOSE "Required to build volk_gnsssdr."
-            TYPE REQUIRED
+        )
+    else()
+        set_package_properties(Python3 PROPERTIES
+            DESCRIPTION "An interpreted, high-level, general-purpose programming language"
         )
     endif()
-
     if(Python2_FOUND)
         set_package_properties(Python2 PROPERTIES
             URL "https://www.python.org/"

cmake/Modules/FindGFLAGS.cmake

@@ -120,6 +120,7 @@ if(GFLAGS_FOUND)
     if(PACKAGE_VERSION)
         set(GFLAGS_VERSION ${PACKAGE_VERSION})
     endif()
+    unset(PACKAGE_VERSION)
 endif()
 
 if(GFLAGS_FOUND AND NOT TARGET Gflags::gflags)

cmake/Modules/FindGNURADIO.cmake

@@ -193,6 +193,7 @@ if(NOT PC_GNURADIO_RUNTIME_VERSION)
     if(PACKAGE_VERSION)
         set(PC_GNURADIO_RUNTIME_VERSION ${PACKAGE_VERSION})
     endif()
+    unset(PACKAGE_VERSION)
 endif()
 
 # Trick to find out that GNU Radio is >= 3.7.4 if pkgconfig is not present

cmake/Modules/FindUHD.cmake

@@ -89,6 +89,7 @@ if(NOT PC_UHD_VERSION)
     if(PACKAGE_VERSION)
         set(UHD_VERSION ${PACKAGE_VERSION})
     endif()
+    unset(PACKAGE_VERSION)
 endif()
 
 if(UHD_FOUND AND NOT TARGET Uhd::uhd)

cmake/Modules/FindVOLK.cmake

@@ -92,6 +92,7 @@ if(NOT VOLK_VERSION)
     if(PACKAGE_VERSION)
         set(VOLK_VERSION ${PACKAGE_VERSION})
     endif()
+    unset(PACKAGE_VERSION)
 endif()
 
 mark_as_advanced(VOLK_LIBRARIES VOLK_INCLUDE_DIRS VOLK_VERSION)