[Letux-kernel] How to build LetuxOS Android Kernel for LetuxOS Replicant 4.2?

[Andreas Kemnade]

On Sun, 30 Jun 2019 21:49:22 +0200
"H. Nikolaus Schaller" <hns at goldelico.com> wrote:

> > Am 30.06.2019 um 17:39 schrieb Andreas Kemnade <andreas at kemnade.info>:
> > 
> > On Sun, 30 Jun 2019 17:29:27 +0200
> > "H. Nikolaus Schaller" <hns at goldelico.com> wrote:
> >   
> >>> Am 30.06.2019 um 16:13 schrieb Andreas Kemnade <andreas at kemnade.info>:
> >>> 
> >>> On Sun, 30 Jun 2019 10:55:52 +0200
> >>> "H. Nikolaus Schaller" <hns at goldelico.com> wrote:
> >>> 
> >>> =    
> >>>> Another thought: most likely I can simply copy binaries like iwconfig to get more comparable results.
> >>>> I.e. enhance the Replicant installation by some tools from Debian :)
> >>>>   
> >>> well, there is a quite standard wpa_suppilcant in the replicant builds
> >>> (or should be, in the replicant 6 build it is missing, but I guess I
> >>> can push a fix this evening).    
> >> 
> >> I remember having seen a wpa_suppilcant config file, but do not know if
> >> it exists.
> >> 
> >> And I have not found an iwconfig so I could not check what the kernel thinks
> >> about presence and setup of the interface and was not able to test it.
> >>   
> > well, you can start wpa_suppilcant without a configuration file,
> > just with a control interface via -C commandline parameter
> > 
> > and then to everything using wpa_cli.  
> 
> I have now tried:
> 
> root at android:/ # wpa_supplicant -Dwext -iwlan0 -c/etc/wpa_supplicant.conf      
> root at android:/ # 
> root at android:/ # wpa_cli                                                   
> wpa_cli v2.0-devel-
> Copyright (c) 2004-2012, Jouni Malinen <j at w1.fi> and contributors
> 
> This software may be distributed under the terms of the BSD license.
> See README for more details.
> 
> 
> Using interface 'wlan0'
> 
> Interactive mode
> 
> >   
> 
> Doesn't look that bad because it reports that the interface "wlan0" exists.
> 
> Since I have no experience with wpa_cli: how do I now scan for WLAN base stations?

you can enter help and see commands.
some basics
scan         - starts scan
scan_results - displays scan results.

and then
add_network
-> returns a number
set_network X ssid "ssid"
set_network X key_mgmt WPA-PSK (or NONE for unencrypted things)
set_network X psk "passphrase"
enable_network X

but as a first step, I would check whether libertas survives suspend if
iface is up on a known-good system. There might be problems, so we might
debug a kernel problem and not a replicant one. For the GTA04A5, we do
not have these problems. 


> 
> > 
> > wpa_supplicant now also available on my replicant-6 builds,
> > but there seems to be some issue with a socket. So I have drilled
> > a lot through the thick wall.  
> 
> BTW: making a dual-partition card wasn't difficult any more after doing all that preparation work:
> 
> makesd -v 20170423-kernel-4.10 replicant -kboot letux-4.14.129-replicant -dboot letux-4.14.129-replicant -m letux-4.14.129-replicant -v latest quantumstep
> 
> I could also mount the partition (one has to know that it is in /dev/block/):
> 
> mkdir /mnt/debian
> mount -t ext4 /dev/block/mmcblk0p2 /mnt/debian
> 
> "chroot /mnt/debian /bin/bash" works. Well, one has to update the $PATH first:
> 
> PATH=/bin:/usr/bin:$PATH
> 
> Then, I can run e.g. iwconfig.
> 
> But not much more since /proc, /sys, /dev are empty...
> So setting up this "Replian" is a little more complex.
> 
well, in the chroot
mount -t devtmpfs none /dev
mount -t proc none /proc
mount -t sys none /sys

Regards,
Andreas