diff -up xpdf-4.04/xpdf/GlobalParams.h.null-fix xpdf-4.04/xpdf/GlobalParams.h
--- xpdf-4.04/xpdf/GlobalParams.h.null-fix	2023-01-30 14:10:42.286805370 -0500
+++ xpdf-4.04/xpdf/GlobalParams.h	2023-01-30 14:10:50.383895185 -0500
@@ -237,7 +237,7 @@ public:
 
   // Initialize the global parameters by attempting to read a config
   // file.
-  GlobalParams(const char *cfgFileName);
+  GlobalParams(const char *cfgFileName = NULL);
 
   ~GlobalParams();