Created attachment 452 [details]
Configure Fail/Pass Log

meta-toolchain and poky tree's sysroot folder can't identify which arch sysroot we want to use, this is my testing steps:
1.Launch eclipse and install Yocto plug-in, install meta-toolchain in /opt or build toochain with a poky project.
2.In eclipse, set Toochaine Root Location as /opt/poky/1.2/ or yocto build folder, set sysroot as /opt/poky/1.2/sysroot/ or Yocto build sysroot, mine is in /home/xuhongna/workspace/1.2M4/poky/build/tmp/sysroots, set any Target Architectre, here i set i568-poky-linux, in Window->Preferences->Yocot Project ADT.
3.New a C/C++ project based on Yocto ADT Project templates.
4.Let the project selected, click eclipse menu Project->Change Yocot Project Settings to confirm our setting is like Preferences's set.
5.Then Project->Reconfigure Project.
6.Configure fail.
7.If we choose /opt/poky/1.2/sysroots/i586-poky-linux or ${POKY_BUILD_TREE}/tmp/sysroots/qemuOOXX as sysroot location, it can build pass.