Cross compile Mono from source for the Omega2 and Omega2+

Jackdaw · 1 Sept 2017, 19:14

@Martin-Frederiksen Yeah I also had this problem with the .ipk file. You can extract the ipk and then the data.tar.gz file and copy all the contents of data.tar.gz to "/". That precompiled mono package you mentioned is old. Will compile a newer version for you. ;). Maybe that one will work with opkg.

UPDATE: here you go:
http://51.255.195.37/mono-runtime_5.0-1_mipsel_24kc.ipk

Small note: I could not check which version this one is. I compiled the latest mono source and named it 5.0. You can check mono --version which version it really is.

So if opkg doesn't work then extract the files and copy those to root:

tar xf mono-runtime_5.0-1_mipsel_24kc.ipk
tar xf data.tar.gz
cp -R ./bin ./lib /

Martin Frederiksen · 3 Sept 2017, 16:17

@Jackdaw Thanks man.. That is so awesome, and yes, I actually had to extract, as opkg did not work. For anyone following along though, I had to use tar with xzf parameters, to uncompress from zip.... Great work, and it is version 5.7.0 in this package.

Cheers

/M

Jackdaw · 3 Sept 2017, 18:37

@Martin-Frederiksen Glad that it worked! Will have to take a look at the ipk file. Shame that opkg doesn't work.

Rainer Müller · 9 Mar 2018, 12:04

Hi @Jackdaw!

I tried to compile mono myself, it seems there is an environment variable STAGING_DIR missing. But this did not completely solve my problems. Can you perhaps provide a working link with your mono version?

Jackdaw · 9 Mar 2018, 12:04

@Rainer-Müller

You can ignore the STAGING_DIR. If you do all the things written in my instructions, then you have a fully working mono package :).

I see that the precompiled package is not there anymore. Will create one somewhere this weekend.

Irawan Fardiawan · 25 May 2018, 04:36

Hi Jack can you reupload the ipk compiled for mono you build. Thanks a lot

Jackdaw · 24 Jul 2018, 20:57

Wow, sorry I forgot to add a package. That took me a time to notice.

Do people still have problems compiling mono for the Omega? I will try again this weekend and update the tutorial. Please remind me again. :).

Jackdaw · 31 Jul 2018, 19:46

I could not cross compile the recent version of mono. Will see if I will be more successfull at the end of this week.

paaablo80 · 21 Aug 2018, 22:28

This post is deleted!

paaablo80 · 22 Aug 2018, 20:27

@Jackdaw I stuck on setting crosscompiled environment. I mean - after all setup for crosscopile (I used also recent openwrt-sdk-18.06.1-ramips-mt76x8_gcc-7.3.0_musl.Linux-x86_64.tar.xz) BuildMono/bin/mono is build for Ubuntu (not for Omega2). Both BuildHost/bin/mono and BuildMono/bin/mono works on Ubuntu but the latter not works on Omega2 (wrong ELF format). So I suspected that cross-tools are wrongly setup and in the second stage still Ubuntu host tools are used (in /Makefile commands CC = gcc)

I tried your solution with export CC=$CROSS-gcc
and also alising it manually before automake and make but it still build host-platform version

Any idea how to properly setup cross-toolsets before compiling for ramips-mt76x8 ?

paaablo80 · 22 Aug 2018, 22:40

I think I have ignored that autogen.sh ends with an error around checking shm_open:

checking for inotify_rm_watch with unsigned wd... no
checking for shm_open that works well enough with mmap... configure: error: in `/home/project/mono':
configure: error: cannot run test program while cross compiling
See `config.log' for more details

How to workaround it? Obviously it can not run crosscompiled test on build machine

paaablo80 · 22 Aug 2018, 23:04

...ok, I figure it out (more or less):
There's on open regressed issue on Mono project for this:
https://github.com/mono/mono/issues/9951

I had to switch back to 2018-04 branch on Mono to make it work.
Compiled with openwrt-sdk-18.06.1-ramips-mt76x8_gcc-7.3.0_musl.Linux-x86_64.tar.xz

Cheers!

eimantas duda · 18 Mar 2019, 15:41

Is it possible to get new link for package download?

Jackdaw · 1 May 2019, 00:56

Sorry for the long wait.

You can download the precompiled package here. Use at your own risk.
It contains the mono binary and the full .net library, so you need to extend your root partition with a microsd card.

http://207.180.192.51/mono-5.8.1.0-1_mipsel_24kc.ipk

Could someone check if the package will install with opkg this time? Thanks.

I will update this thread in a while. Some things has been changed.

Danny Hacker · 13 Nov 2019, 01:18

@Jackdaw

Is there an updated valid link for mono-5.8.1.0-1_mipsel_24kc.ipk? I'm not able to get it to download.

DDFFRR · 30 Jan 2020, 16:09

@paaablo80 I'm trying to build mono with no luck. Would you please help me with this? If you already have it donde it would be great help. Please let me know. Thank you.

DDFFRR · 30 Jan 2020, 16:09

@Jackdaw I'm trying to build mono with no luck. Would you please help me with this? If you already have it donde it would be great help. Please let me know. Thank you.

Astrologer Baba ji · 1 Feb 2020, 14:48

This post is deleted!

Jackdaw2 · 24 Dec 2020, 15:09

I am still trying to recover my old account, but here you can download the pre-built mono package for Omega2 and Omega2+.

https://automation.b-server.nl/job/Mono-5.8.1.0_Onion_Omega2/lastSuccessfulBuild/artifact/mono_working_dir/BuildOmega/mono_5.8.1.0-1_mipsel_24kc.ipk

haythem · 23 Jun 2021, 09:52

@Jackdaw2 HEY
i am noob and i have no idea how to do all this. do you have some free time to chat on how to solve my problem?
i have a made a program with c# in visual studio on my windows10 machine. i want to know how i can run it or re code it on my omega 2+. is it even possible? thank you