Try forward declaration to make it build on ia64

hplip.spec

@@ -7,6 +7,7 @@ Group: System Environment/Daemons
 Obsoletes: hpoj
 Url: http://sourceforge.net/projects/hpinkjet
 Source: http://kent.dl.sourceforge.net/sourceforge/hpinkjet/%{name}-%{version}.tar.gz
+Patch1: hplip-forward-decl.patch
 BuildRoot:	%{_tmppath}/%{name}-%{version}-buildroot
 
 Requires: desktop-file-utils >= 0.2.92
@@ -43,6 +44,7 @@ SANE driver for scanners in HP's multi-function devices (from HPOJ).
 %prep
 rm -rf $RPM_BUILD_DIR/%{name}-%{version}
 %setup -q
+%patch1 -p1 -b .forward-decl
 
 %build
 %configure