cmake: Fix X_LIBRARY option for specifying name of 3rd party library.

Declaring it as PATH option was incorrect because then the option hanlding logic resolved it to an absolute path which is not what we want for this option which should be either a plain library name or a path relative to X_LIBRARY_DIR.

Author: rsomla1

cdk/cmake/config_options.cmake

@@ -100,6 +100,11 @@ function(add_config_option OPT TYPE)
     set(${OPT} $ENV{${OPT}})
   endif()
 
+  if(DEFINED ${OPT} AND NOT "${${OPT}}" STREQUAL "${default_value}")
+    # message(STATUS "Option ${OPT} set explictily to: ${${OPT}}")
+    set(${OPT}_SET true CACHE INTERNAL "")
+  endif()
+
   if(NOT DEFINED ${OPT} AND DEFINED default_value)
     set(${OPT} ${default_value})
   endif()
@@ -134,7 +139,7 @@ function(show_config_options)
 
   foreach(opt ${CONFIG_OPTIONS})
 
-    if(NOT "${${opt}_ADVANCED}")
+    if(${opt}_SET OR NOT "${${opt}_ADVANCED}")
       message(": ${opt}: ${${opt}}")
       message("${${opt}_DOC}\n")
     endif()

cdk/cmake/dependency.cmake

@@ -124,7 +124,7 @@ function(add_ext NAME HEADER)
     "Path to ${EXT_LIB} bin directory."
   )
 
-  add_config_option(${EXT_LIB}_LIBRARY PATH ADVANCED
+  add_config_option(${EXT_LIB}_LIBRARY STRING ADVANCED
     "${EXT_LIB} library name"
   )