Firstly, build atom-pc sato image, and add layers meta-intel/meta-cedartrail and then build cedartrail sato image, gcc-cross configure failed.
the log are:
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| configure: error: in `/home/build/git-work/1.3M2rc1/hob/poky/build/tmp/work/core2-poky-linux/gcc-cross-4.6.3+svnr184847-r25/gcc-4_6-branch/build.x86_64-linux.i586-poky-linux/i586-poky-linux/libgcc':
| configure: error: changes in the environment can compromise the build
| configure: error: run `make distclean' and/or `rm ./config.cache' and start over
| make: *** [configure-target-libgcc] Error 1
| ERROR: oe_runmake failed
NOTE: package gcc-cross-4.6.3+svnr184847-r25: task do_compile: Failed
ERROR: Task 659 (/home/build/git-work/1.3M2rc1/hob/poky/meta/recipes-devtools/gcc/gcc-cross_4.6.bb, do_compile) failed with exit code '1'
Waiting for 1 running tasks to finish:
0: eglibc-locale-2.13-r20 do_package (pid 31909)
NOTE: package eglibc-locale-2.13-r20: task do_package: Succeeded
NOTE: Tasks Summary: Attempted 2879 tasks of which 2701 didn't need to be rerun and 1 failed.

Summary: 1 task failed:
  /home/build/git-work/1.3M2rc1/hob/poky/meta/recipes-devtools/gcc/gcc-cross_4.6.bb, do_compile
Summary: There were 7 WARNING messages shown.
Summary: There was 1 ERROR message shown, returning a non-zero exit code.
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reproduce steps:
1.git clone git://git.yoctoproject.org/poky
2.In poky directory, run “git checkout denzil”
3.git clone git://git.yoctoproject.org/meta-intel
4.in meta-intel directory, run “git checkout denzil”
5.in poky directory, run “source oe-init-build-env”
6.build machine set as atom-pc and build “core-image-sato”. build success
7.then add “mata-intel” and “mata-cetratrail” layers
8.add NF_VERSION = "1" LICENSE_FLAGS_WHITELIST = "license_cdv-pvr-driver_1.0" to conf/local.conf  
9.build “core-image-sato”, using the same directory with step 5.
10.error occurs