EAFNOSUPPORT despite kernel build in

Jan Kiszka jan.kiszka at siemens.com
Tue Dec 4 14:46:55 CET 2018

On 04.12.18 12:04, Johannes Holtz via Xenomai wrote:
> Hello,
> When I request a socket with AF_RTIPC I get an EAFNOSUPPORT in return.
> int sock = socket(AF_RTIPC, SOCK_DGRAM, IPCPROTO_IDDP);

You likely didn't wrap this posix application to link against the Xenomai libs, 
rather than normal libc. See manuals / wikis.

> rtipc.h is included
> #include <rtdm/rtipc.h>
> I have build the support for RTIPC into the kernel (not a module) and
> expected this to work more or less out of the box. Did I forget something
> or must this feature be a module?
> I have searched for a solution but haven't found anything.
> Here information about the system:
> virtual machine (VBox) with 1 CPU,  2.5GB RAM, 15GB disk
> base kernel version is 3.18.20
> xenomai  version is 2.6.5 (from the download page not from the git repo)

Don't start anything new on 2.6 anymore, it's long retired.

> using the included ipipe patch
> xenomai-2.6.5/ksrc/arch/x86/patches/ipipe-core-3.18.20-x86-7.patch

Same goes for such old kernels and patches.

> the kernel config has the feature enabled
> root at xeno:~/kernelbuild# grep RTIPC /boot/config-3.18.20


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