err: //lvm/Package[lvm2]/ensure: change from absent to latest failed: Could not update: Execution of '/usr/bin/emerge sys-fs/lvm2' returned 1: Calculating dependencies  .... done!
[ebuild     U  ] dev-libs/gmp-5.0.2_p1 [4.2.2] USE="cxx%* -static-libs%"
[ebuild     U  ] dev-libs/mpfr-3.0.1_p4 [2.3.0_p4]
[ebuild  N     ] dev-libs/mpc-0.8.2
[ebuild  N     ] virtual/yacc-0
[ebuild     U  ] sys-devel/binutils-2.21.1-r1 [2.18-r1] USE="zlib%* -static-libs%"
[ebuild  NS    ] sys-devel/gcc-4.5.3-r1 [4.1.2] USE="cxx fortran mudflap nls nptl openmp (-altivec) -bootstrap -build -doc (-fixed-point) -gcj -graphite -gtk (-hardened) (-libffi) (-libssp) -lto (-multilib) -multislot -nocxx -nopie -nossp -objc -objc++ -objc-gc -test -vanilla"
[ebuild     U  ] sys-libs/glibc-2.13-r4 [2.9_p20081201-r2]
[ebuild     U  ] sys-fs/udev-171-r5 [115-r1] USE="acl%* rule_generator%* -action_modeswitch% -build% -debug% -edd% -extras% -floppy% -gudev% -hwdb% -introspection% -keymap% -test%"
[ebuild  N     ] sys-fs/lvm2-2.02.88  USE="lvm1 readline static static-libs -clvm (-cman) (-selinux)"
[blocks B      ] <sys-devel/patch-2.6 ("<sys-devel/patch-2.6" is blocking sys-libs/glibc-2.13-r4)
[blocks B      ] <sys-kernel/linux-headers-2.6.34 ("<sys-kernel/linux-headers-2.6.34" is blocking sys-fs/udev-171-r5)

 * Error: The above package list contains packages which cannot be
 * installed at the same time on the same system.

  (sys-devel/patch-2.5.9::gentoo, installed) pulled in by
    sys-devel/patch required by @system

  (sys-libs/glibc-2.13-r4::gentoo, ebuild scheduled for merge) pulled in by
    sys-libs/glibc required by (dev-java/sun-jre-bin-1.6.0.26::BBS, installed)
    virtual/libc required by @system
    >=sys-libs/glibc-2.8 required by (sys-devel/gcc-4.5.3-r1::gentoo, ebuild scheduled for merge)
    >=sys-libs/glibc-2.7 required by (sys-libs/pam-1.1.5::gentoo, installed)
    virtual/libc required by (dev-libs/glib-2.18.4-r1::gentoo, installed)
    >=sys-libs/glibc-2.10 required by (sys-fs/udev-171-r5::gentoo, ebuild scheduled for merge)

  (sys-fs/udev-171-r5::gentoo, ebuild scheduled for merge) pulled in by
    virtual/dev-manager required by (sys-kernel/gentoo-sources-2.6.29-r5::gentoo, installed)
    >=sys-fs/udev-151-r4 required by (sys-fs/lvm2-2.02.88::gentoo, ebuild scheduled for merge)
    virtual/dev-manager required by @system

  (sys-kernel/linux-headers-2.6.27-r2::gentoo, installed) pulled in by
    virtual/os-headers required by @system
    virtual/os-headers required by (sys-fs/udev-171-r5::gentoo, ebuild scheduled for merge)
    >=sys-kernel/linux-headers-2.6.9 required by (sys-libs/glibc-2.13-r4::gentoo, ebuild scheduled for merge)
    virtual/os-headers required by (sys-libs/glibc-2.13-r4::gentoo, ebuild scheduled for merge)