[ELDK] Posix Shared Memory

[Daniel Stonier]

Hi,

Using an AMC440EP and just realised the posix shared memory wasn't
around. Had somewhat taken that for granted on my pc systems. To
configure the kernel I've tried

Filesystems -> Pseudo filesystems -> Virtual memory filesystem support

or more simply, tmpfs. Do I also need to enable


General Setup -> Use full shmem filesystem?

Regardless, neither seem to be working. If I use the tmpfs and mount
it on /dev/shm as the man pages suggest, the tmpfs seems to work.
Creation of files there work ok and disappear on unmounting, but still
I get errors when trying to create a shared memory object. The
returned error value (errno) obtained after a failed shm_open is also
curious - 38. Which is one of the real time signals, not an expected
shm_open error value.

If anyone's tried this before and has some advice, it'd be much
appreciated, thanks.
Daniel Stonier.