qnx ln -sP mount /tmp as ram-disk

to mount the /tmp directory as a RAM-disk, execute the following command:

ln -Ps /dev/shmem /tmp

Or place the following line in your buildfile (we'll talk about buildfiles over the next few chapters):

[type=link] /tmp=/dev/shmem











参考资料：

Overview of Building Embedded Systems

http://www.qnx.com/developers/docs/6.3.2/neutrino/building/overview.html

Working with Filesystems

http://www.qnx.com/developers/docs/6.4.0/neutrino/user_guide/fsystems.html