beast linux # sudo emerge -av rtl8180

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild   R   ] net-wireless/rtl8180-0.22_pre20050528  0 kB 

Total: 1 package (1 reinstall), Size of downloads: 0 kB

Would you like to merge these packages? [Yes/No] y

>>> Emerging (1 of 1) net-wireless/rtl8180-0.22_pre20050528 to /
 * rtl8180-0.22_pre20050528.tar.bz2 RMD160 ;-) ...                        [ ok ]
 * rtl8180-0.22_pre20050528.tar.bz2 SHA1 ;-) ...                          [ ok ]
 * rtl8180-0.22_pre20050528.tar.bz2 SHA256 ;-) ...                        [ ok ]
 * rtl8180-0.22_pre20050528.tar.bz2 size ;-) ...                          [ ok ]
 * checking ebuild checksums ;-) ...                                      [ ok ]
 * checking auxfile checksums ;-) ...                                     [ ok ]
 * checking miscfile checksums ;-) ...                                    [ ok ]
 * checking rtl8180-0.22_pre20050528.tar.bz2 ;-) ...                      [ ok ]
 * Determining the location of the kernel source code
 * Found kernel source directory:
 *     /usr/src/linux
 * Found sources for kernel version:
 *     2.6.20-gentoo-r7
 * Checking for suitable kernel configuration options...                  [ ok ]
>>> Unpacking source...
>>> Unpacking rtl8180-0.22_pre20050528.tar.bz2 to /var/tmp/portage/net-wireless/rtl8180-0.22_pre20050528/work
sed: can't read ieee80211/Makefile: No such file or directory
>>> Source unpacked.
>>> Compiling source in /var/tmp/portage/net-wireless/rtl8180-0.22_pre20050528/work/rtl8180-0.22_pre20050528 ...
 * Preparing ieee80211_crypt-r8180 module
make -C /usr/src/linux SUBDIRS=/var/tmp/portage/net-wireless/rtl8180-0.22_pre20050528/work/rtl8180-0.22_pre20050528 modules
make[1]: Entering directory `/usr/src/linux-2.6.20-gentoo-r7'
  CC [M]  /var/tmp/portage/net-wireless/rtl8180-0.22_pre20050528/work/rtl8180-0.22_pre20050528/ieee80211_rx.o
  CC [M]  /var/tmp/portage/net-wireless/rtl8180-0.22_pre20050528/work/rtl8180-0.22_pre20050528/ieee80211_tx.o
/var/tmp/portage/net-wireless/rtl8180-0.22_pre20050528/work/rtl8180-0.22_pre20050528/ieee80211_rx.c:20:26: error: linux/config.h: No such file or directory
/var/tmp/portage/net-wireless/rtl8180-0.22_pre20050528/work/rtl8180-0.22_pre20050528/ieee80211_tx.c:34:26: error: linux/config.h: No such file or directory
make[2]: *** [/var/tmp/portage/net-wireless/rtl8180-0.22_pre20050528/work/rtl8180-0.22_pre20050528/ieee80211_rx.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: *** [/var/tmp/portage/net-wireless/rtl8180-0.22_pre20050528/work/rtl8180-0.22_pre20050528/ieee80211_tx.o] Error 1
make[1]: *** [_module_/var/tmp/portage/net-wireless/rtl8180-0.22_pre20050528/work/rtl8180-0.22_pre20050528] Error 2
make[1]: Leaving directory `/usr/src/linux-2.6.20-gentoo-r7'
make: *** [2.6] Error 2

!!! ERROR: net-wireless/rtl8180-0.22_pre20050528 failed.
Call stack:
  ebuild.sh, line 1614:   Called dyn_compile
  ebuild.sh, line 971:   Called qa_call 'src_compile'
  environment, line 4027:   Called src_compile
  ebuild.sh, line 1304:   Called linux-mod_src_compile
  linux-mod.eclass, line 516:   Called die

!!! Unable to make  KSRC=/usr/src/linux all.
!!! If you need support, post the topmost build error, and the call stack if relevant.
!!! A complete build log is located at '/var/tmp/portage/net-wireless/rtl8180-0.22_pre20050528/temp/build.log'.