Package support request (vtun, in oldpackages repo)

Hello!
There was vtund package support in old openwrt, then it was dropped.
For old targets you can still download it but not for recent like Linksys wrt*ac.
The package actually exists in repositry https://dev.openwrt.org/browser/packages/net/vtun/Makefile.
I've tried to compile it for mvebu myself but I failed. (All this cross platform compile stuff in SDK...)
Can you simply add support for this package ? I believe I'm not the only one who's missing it ....
Thx in advance.

That repo is now the abandoned "oldpackages", where those old package remain that have no active maintainer.
http://git.openwrt.org/?p=packages.git;a=summary

In 2014 there was a cleanup and switch to Github repo. All packages need a defined "maintainer" who takes care of the version updates etc.

Starting in June 2014 packages were moved from svn.openwrt.org to Github, and only those packages were moved that somebody wants to maintain.
https://lists.openwrt.org/pipermail/openwrt-devel/2014-June/025810.html
https://forum.openwrt.org/viewtopic.php?id=52219

Somebody needs to volunteer to be the maintainer for that vtun package. That somebody might be you.... Just update the package source code to compile with the current LEDE, build and test it, then issue a PR in Github packages feed repo.

So I downloaded + extracted SDK. Downloaded this Makefile from existing repo..
Edit...feeds.conf.default
make menuconfig
./scripts/feeds update -a
And I get:
"Updating feed 'custom' from '/tmp/vtun_ipk' ...
Create index file './feeds/custom.index'
...lede-sdk-mvebu_gcc-5.4.0_musl_eabi.Linux-x86_64/feeds/custom.tmp/info/.files-packageinfo.mk:1: *** target pattern contains no '%'. Stop."
before I get to building stage... and I have no clue what these SDK scripts do...
I believe there are no majors changes needed to be done to the package Makefile, but there is no info on SDK...

Make sure that the path where you extract the SDK does not contain special characters like spaces or colons.

./scripts/feeds update -a
Updating feed 'custom' from '/tmp/vtun_ipk' ...
Create index file './feeds/custom.index'
/home/phan/sdk/feeds/custom.tmp/info/.files-packageinfo.mk:1: *** target pattern contains no '%'. Stop.

Seems to be quite ok path...