https://www.illumos.org/issues/17636

--- hplip-3.25.6/prnt/hpcups/HPCupsFilter.cpp.orig
+++ hplip-3.25.6/prnt/hpcups/HPCupsFilter.cpp
@@ -42,6 +42,8 @@
 #include <time.h>
 #include "utils.h"
 
+extern "C" int getdomainname(char*, int);
+
 #define HP_FILE_VERSION_STR    "03.09.08.0"
 
 static HPCupsFilter    filter;
--- hplip-3.25.6/prnt/hpps/hppsfilter.c.orig
+++ hplip-3.25.6/prnt/hpps/hppsfilter.c
@@ -32,6 +32,7 @@
 \*****************************************************************************/
 #include "hppsfilter.h"
 
+int getdomainname(char*, int);
 
 /*  save final output ps file: in cupsd.conf file  value #hpLogLevel 15  */
 static int g_savepsfile = 0;