one more thing : while using the toolchain , architecture for the board for which toolchain will be used .
ARM V7-A (Architecture) is for ( CORE DESIGNED BY ARM HOLDING)
ARM Cortex-A5, ARM Cortex-A7, ARM Cortex-A8, ARM Cortex-A9, ARM Cortex-A12, ARM Cortex-A15, ARM Cortex-A17
OLinuxno is having Cortex -A8 .