Index: tests/include/.expect/includes.nast.txt
===================================================================
--- tests/include/.expect/includes.nast.txt	(revision 7831e8fb0419110ca1ed222c6c930777cb7a9753)
+++ tests/include/.expect/includes.nast.txt	(revision 598dc68aeff284878908b64b883a5fdb22ffe6df)
@@ -1,1 +1,1 @@
-include/includes.cfa:169:25: warning: Compiled
+include/includes.cfa:173:25: warning: Compiled
Index: tests/include/includes.cfa
===================================================================
--- tests/include/includes.cfa	(revision 7831e8fb0419110ca1ed222c6c930777cb7a9753)
+++ tests/include/includes.cfa	(revision 598dc68aeff284878908b64b883a5fdb22ffe6df)
@@ -10,6 +10,6 @@
 // Created On       : Wed May 27 17:56:53 2015
 // Last Modified By : Peter A. Buhr
-// Last Modified On : Tue May 10 16:36:44 2022
-// Update Count     : 776
+// Last Modified On : Sun May 22 08:27:20 2022
+// Update Count     : 779
 //
 
@@ -47,6 +47,8 @@
 #endif
 #include <execinfo.h>
-#include <expat.h>
+#if __has_include( "expat.h" )
+#include <expat.h>										// may not be installed
 #include <expat_external.h>
+#endif
 #include <fcntl.h>
 #include <features.h>
@@ -79,5 +81,7 @@
 //#include <link.h>										// CFA bug #240 nested anonymous enum fails
 #include <locale.h>
-#include <ltdl.h>
+#if __has_include( "ltdl.h" )
+#include <ltdl.h>										// may not be installed
+#endif
 //#include <malloc.h>									// cannot include in extern "C" because of CFA #include_next
 #include <math.h>