Description of problem:
   tcpdump can't be rebuilded

Version-Release number of selected component (if applicable):
   kernel-headers-2.6.18-8.el5
   tcpdump-3.9.4-8.1

Steps to Reproduce:
  rpmbuild -ba tcpdump.spec

...  
gcc -O2 -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions
-fstack-protector --param=ssp-buffer-size=4 -m32 -march=i386 -mtune=generic
-fasynchronous-unwind-tables -I.  -g -D_U_="" -fPIC -DHAVE_CONFIG_H
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -fPIC -DPIC -c ./fad-getad.c
In file included from ./fad-getad.c:64:
/usr/include/linux/if_packet.h:52: error: expected specifier-qualifier-list
before '__u32'
...