cups 1.4.1 under Solaris 10 5/09

[Rainer Blaes]

Dear all,
we tried to "make" cups 1.4.1 on our Sparc system running
- Solaris 10 5/09 + gcc 3.4.6 + GNU make 3.81
Unfortunately we got this error:
........
........
........
Compiling usb.c...
In file included from usb.c:63:
usb-unix.c:569: error: conflicting types for 'side_cb'
usb-unix.c:40: error: previous declaration of 'side_cb' was here
usb-unix.c:569: error: conflicting types for 'side_cb'
usb-unix.c:40: error: previous declaration of 'side_cb' was here
usb-unix.c: In function `side_cb':
usb-unix.c:582: warning: `return' with a value, in function returning void
usb-unix.c:625: warning: `return' with a value, in function returning void
usb.c: At top level:
usb-unix.c:40: warning: 'side_cb' declared `static' but never defined
usb-unix.c:569: warning: 'side_cb' defined but not used
make[1]: *** [usb.o] Error 1
make: *** [all] Error 1

Any way to correct this error?

THX, Rainer