cmake: fix error getting LOCATION property on non-imported target

Closes #7885

CMakeLists.txt

@@ -1494,12 +1494,10 @@ set(libdir                  "${CMAKE_INSTALL_PREFIX}/lib")
 foreach(_lib ${CMAKE_C_IMPLICIT_LINK_LIBRARIES} ${CURL_LIBS})
   if(TARGET "${_lib}")
     set(_libname "${_lib}")
-    get_target_property(_libtype "${_libname}" TYPE)
-    if(_libtype STREQUAL INTERFACE_LIBRARY)
-      # Interface libraries can occur when an external project embeds curl and
-      # defined targets such as ZLIB::ZLIB by themselves. Ignore these as
-      # reading the LOCATION property will error out. Assume the user won't need
-      # this information in the .pc file.
+    get_target_property(_imported "${_libname}" IMPORTED)
+    if(NOT _imported)
+      # Reading the LOCATION property on non-imported target will error out.
+      # Assume the user won't need this information in the .pc file.
       continue()
     endif()
     get_target_property(_lib "${_libname}" LOCATION)