Merge branch '1011-use-proper-linker-config-on-hp-ux' into 'master'

Resolve "Use proper linker (config) on HP-UX"

Closes #1011

See merge request isc-projects/bind9!1940

configure

@@ -20609,6 +20609,12 @@ fi
 		 SO_LDFLAGS="-G -z text"
 		 SO_LD="ld"
 	        ;; #(
+  ia64-hp-hpux*) :
+
+		 SO_CFLAGS="+z"
+	         SO_LDFLAGS="-b"
+		 SO_LD="${CC}"
+	        ;; #(
   *) :
 
 		 SO_CFLAGS="-fPIC"

configure.ac

@@ -2604,6 +2604,11 @@ AS_IF([test "$with_dlopen" = "yes"],
 		 SO_LDFLAGS="-G -z text"
 		 SO_LD="ld"
 	       ],
+	       [ia64-hp-hpux*],[
+		 SO_CFLAGS="+z"
+	         SO_LDFLAGS="-b"
+		 SO_LD="${CC}"
+	       ],
 	       [
 		 SO_CFLAGS="-fPIC"
 	       ])