It would make the build system more simple, and the cross
toolchains would do the rest to you.
Toolchains like buildroot default not enable the __gnu_linux__
marco in the pre-processor will surfure from the systsm unknown
problem. You should enable the marco in building toolchains
or have a look on those scripts in build directory.
Change-Id: I8f6af3391aa3d94d602ec8d84ba5e43839859169
Signed-off-by: Randy Li <randy.li@rock-chips.com>
