wonder@tux ~ $ sudo emerge cdemu 
Calculating dependencies... done!

>>> Emerging (1 of 1) app-cdr/cdemu-0.8 to /
 * cdemu-0.8.tar.bz2 MD5 ;-) ...                                          [ ok ]
 * cdemu-0.8.tar.bz2 RMD160 ;-) ...                                       [ ok ]
 * cdemu-0.8.tar.bz2 SHA1 ;-) ...                                         [ ok ]
 * cdemu-0.8.tar.bz2 SHA256 ;-) ...                                       [ ok ]
 * cdemu-0.8.tar.bz2 size ;-) ...                                         [ ok ]
 * checking ebuild checksums ;-) ...                                      [ ok ]
 * checking auxfile checksums ;-) ...                                     [ ok ]
 * checking miscfile checksums ;-) ...                                    [ ok ]
 * checking cdemu-0.8.tar.bz2 ;-) ...                                     [ ok ]
 * Determining the location of the kernel source code
 * Found kernel source directory:
 *     /usr/src/linux
 * Found kernel object directory:
 *     /lib/modules/2.6.18-gentoo-r3/build
 * Found sources for kernel version:
 *     2.6.18-gentoo-r3
>>> Unpacking source...
>>> Unpacking cdemu-0.8.tar.bz2 to /var/tmp/portage/cdemu-0.8/work
>>> Source unpacked.
>>> Compiling source in /var/tmp/portage/cdemu-0.8/work/cdemu-0.8 ...
 * Preparing cdemu module
rm -f .cdemu*.{ko,mod.o,o}.cmd cdemu*.{ko,o,mod.{c,o}} *.pyc core *~
rm -rf .tmp_versions Modules.symvers
rm -f docs/cdemu.{dvi,pdf}
make[1]: Entering directory `/usr/src/linux-2.6.18-gentoo-r3'
  CC [M]  /var/tmp/portage/cdemu-0.8/work/cdemu-0.8/cdemu_core.o
  CC [M]  /var/tmp/portage/cdemu-0.8/work/cdemu-0.8/cdemu_mod.o
  CC [M]  /var/tmp/portage/cdemu-0.8/work/cdemu-0.8/cdemu_proc.o
  LD [M]  /var/tmp/portage/cdemu-0.8/work/cdemu-0.8/cdemu.o
  Building modules, stage 2.
  MODPOST
  CC      /var/tmp/portage/cdemu-0.8/work/cdemu-0.8/cdemu.mod.o
  LD [M]  /var/tmp/portage/cdemu-0.8/work/cdemu-0.8/cdemu.ko
make[1]: Leaving directory `/usr/src/linux-2.6.18-gentoo-r3'
>>> Source compiled.
>>> Test phase [not enabled]: app-cdr/cdemu-0.8

>>> Install cdemu-0.8 into /var/tmp/portage/cdemu-0.8/image/ category app-cdr
**** Installing files ****
install -D -m 644 cdemu.ko /var/tmp/portage/cdemu-0.8/image//lib/modules/2.6.18-gentoo-r3/misc/cdemu.ko
install -D -m 644 libcdemu.py /var/tmp/portage/cdemu-0.8/image//usr/lib/python2.4/site-packages/libcdemu.py
install -D -m 755 cdemu /var/tmp/portage/cdemu-0.8/image//usr/bin/cdemu
install -D -m 755 create_cdemu_devs.sh /var/tmp/portage/cdemu-0.8/image//usr/bin/create_cdemu_devs.sh
**** Skipping depmod
sh create_cdemu_devs.sh
You have udev, nodes will be created automagically
>>> Completed installing cdemu-0.8 into /var/tmp/portage/cdemu-0.8/image/

man:
strip: i686-pc-linux-gnu-strip --strip-unneeded
>>> Merging app-cdr/cdemu-0.8 to /