Related to Bug 1623. In following posix test will use POSIX test suit in ltp. Make it passed as much as possible. And note the failure items.
Failed test cases are recorded in https://wiki.yoctoproject.org/wiki/POSIX-results
Please refer to analysis result of Yocto 1.2 M1 RC2 on wiki page https://wiki.yoctoproject.org/wiki/POSIX-results