syllogism src # emerge -v kqemu
Calculating dependencies... done!
>>> Emerging (1 of 1) app-emulation/kqemu-0.7.2 to /
>>> checking ebuild checksums ;-)
>>> checking auxfile checksums ;-)
>>> checking miscfile checksums ;-)
>>> checking qemu-0.7.2.tar.gz ;-)
>>> checking kqemu-0.7.2.tar.gz ;-)
 * Determining the location of the kernel source code
 * Found kernel source directory:
 *     /usr/src/linux
 * Found sources for kernel version:
 *     2.6.16-gentoo-r12
 * kqemu is binary module with a restricted license.
 * Please read carefully the KQEMU license
 * and http://fabrice.bellard.free.fr/qemu/qemu-accel.html
 * if you would like to see it released under the GPL
>>> Unpacking source...
>>> Unpacking qemu-0.7.2.tar.gz to /var/tmp/portage/kqemu-0.7.2/work
>>> Unpacking kqemu-0.7.2.tar.gz to /var/tmp/portage/kqemu-0.7.2/work
>>> Source unpacked.
>>> Compiling source in /var/tmp/portage/kqemu-0.7.2/work/qemu-0.7.2 ...
Install prefix    /usr
BIOS directory    /usr/share/qemu
binary directory  /usr/bin
Manual directory  /usr/share/man
ELF interp prefix /usr/gnemul/qemu-%M
Source path       /var/tmp/portage/kqemu-0.7.2/work/qemu-0.7.2
C compiler        gcc
Host C compiler   gcc
make              make
host CPU          x86_64
host big endian   no
target list       i386-user arm-user armeb-user sparc-user ppc-user i386-softmmu ppc-softmmu sparc-softmmu x86_64-softmmu mips-softmmu
gprof enabled     no
static build      no
SDL support       yes
SDL static link   yes
mingw32 support   no
Adlib support     no
FMOD support      no
kqemu support     yes

KQEMU Linux module configuration:
kernel sources    /usr/src/linux
kbuild type       2.6
make: Entering directory `/var/tmp/portage/kqemu-0.7.2/work/qemu-0.7.2/kqemu'
make -C /usr/src/linux M=`pwd` modules
make[1]: Entering directory `/usr/src/linux-2.6.16-gentoo-r12'
make[1]: warning: jobserver unavailable: using -j1.  Add `+' to parent make rule.
  CC [M]  /var/tmp/portage/kqemu-0.7.2/work/qemu-0.7.2/kqemu/kqemu-linux.o
/var/tmp/portage/kqemu-0.7.2/work/qemu-0.7.2/kqemu/kqemu-linux.c: In function `kqemu_lock_user_page':
/var/tmp/portage/kqemu-0.7.2/work/qemu-0.7.2/kqemu/kqemu-linux.c:84: error: `mem_map' undeclared (first use in this function)
/var/tmp/portage/kqemu-0.7.2/work/qemu-0.7.2/kqemu/kqemu-linux.c:84: error: (Each undeclared identifier is reported only once
/var/tmp/portage/kqemu-0.7.2/work/qemu-0.7.2/kqemu/kqemu-linux.c:84: error: for each function it appears in.)
/var/tmp/portage/kqemu-0.7.2/work/qemu-0.7.2/kqemu/kqemu-linux.c: In function `kqemu_alloc_zeroed_page':
/var/tmp/portage/kqemu-0.7.2/work/qemu-0.7.2/kqemu/kqemu-linux.c:111: error: `mem_map' undeclared (first use in this function)
/var/tmp/portage/kqemu-0.7.2/work/qemu-0.7.2/kqemu/kqemu-linux.c: In function `kqemu_vmalloc_to_phys':
/var/tmp/portage/kqemu-0.7.2/work/qemu-0.7.2/kqemu/kqemu-linux.c:151: error: `mem_map' undeclared (first use in this function)
make[2]: *** [/var/tmp/portage/kqemu-0.7.2/work/qemu-0.7.2/kqemu/kqemu-linux.o] Error 1
make[1]: *** [_module_/var/tmp/portage/kqemu-0.7.2/work/qemu-0.7.2/kqemu] Error 2
make[1]: Leaving directory `/usr/src/linux-2.6.16-gentoo-r12'
make: *** [kqemu.ko] Error 2
make: Leaving directory `/var/tmp/portage/kqemu-0.7.2/work/qemu-0.7.2/kqemu'

!!! ERROR: app-emulation/kqemu-0.7.2 failed.
Call stack:
  ebuild.sh, line 1539:   Called dyn_compile
  ebuild.sh, line 939:   Called src_compile
  kqemu-0.7.2.ebuild, line 73:   Called die

!!! make failed
!!! If you need support, post the topmost build error, and the call stack if relevant.