Is the above correct [y]

Making module
make -C /usr/src/linux-2.6.21-sabayon-r2 SUBDIRS=/home/morph/vpnclient modules
make[1]: Entering directory `/usr/src/linux-2.6.21-sabayon-r2'
  CC [M]  /home/morph/vpnclient/linuxcniapi.o
/home/morph/vpnclient/linuxcniapi.c:12:26: error: linux/config.h: No such file or directory
make[2]: *** [/home/morph/vpnclient/linuxcniapi.o] Error 1
make[1]: *** [_module_/home/morph/vpnclient] Error 2
make[1]: Leaving directory `/usr/src/linux-2.6.21-sabayon-r2'
make: *** [default] Error 2
Failed to make module "cisco_ipsec.ko".