Declare all host variables upfront and add hpux
AC_CANONICAL_HOST
os_win32=no
-os_darwin=no
-os_linux=no
+os_netbsd=no
os_freebsd=no
+os_openbsd=no
+os_hpux=no
+os_linux=no
+os_solaris=no
+os_darwin=no
os_gnu=no
case "$host" in
@@ -23,6 +27,10 @@ case "$host" in
os_openbsd=yes
TARGET_OS=unix
;;
+ *-*-hpux*)
+ os_hpux=yes
+ TARGET_OS=unix
+ ;;
*-*-linux*)
os_linux=yes
os_gnu=yes
