Roughly cloned from generic.conf and slugos.inc

Here's the error (actually a warning)
ERROR: conflicting preferences for virtual/powerpc-603e-linux-gnu-libc-for-gcc: both glibc-intermediate and glibc specified

Q1. The error is easy to understand, but which dependency should I remove?
Q2. Are the different versions for glibc okay?
S1. This actually worked - thanks guys!

PREFERRED_PROVIDERS += "virtual/${TARGET_PREFIX}gcc-initial:gcc-cross-initial"
PREFERRED_PROVIDERS += "virtual/${TARGET_PREFIX}gcc:gcc-cross"
PREFERRED_PROVIDERS += "virtual/${TARGET_PREFIX}g++:gcc-cross"

PREFERRED_PROVIDERS += "virtual/${TARGET_PREFIX}libc-for-gcc:glibc"
# Select 2.6 versions of the depmod support
PREFERRED_PROVIDERS += "virtual/${TARGET_PREFIX}depmod:module-init-tools-cross"
PREFERRED_PROVIDERS += "virtual/${TARGET_PREFIX}libc-for-gcc:glibc-intermediate"

# compiler/binary/library versions (unslung uses different ones so these
# cannot be in ${MACHINE}.conf)
PREFERRED_VERSION_binutils ?= "2.16"
PREFERRED_VERSION_binutils-cross ?= "2.16"
PREFERRED_VERSION_gcc-cross-initial ?= "4.1.1"
PREFERRED_VERSION_gcc-cross ?= "4.1.1"
PREFERRED_VERSION_gcc ?= "4.1.1"
PREFERRED_VERSION_glibc = "2.5"
PREFERRED_VERSION_glibc-initial = "2.3.2"
PREFERRED_VERSION_glibc-intermediate = "2.5"