[Cin] proot on termux

[Andrew Randrianasulu]

I have i386 debian 11 on my arm tablet now, but road to it was somewhat
bumpy.

debootstrap as provided by termux does not like --foreign option, so I
tried modification of scrip commands found at

https://github.com/sp4rkie/debian-on-termux/blob/master/debian_on_termux_10.sh
 (I have Android 10 tablet)

$ debootstrap --variant=minbase --exclude=systemd --arch=i386 bullseye
deb_11

but you need to set main repo here or create debootstrap/mirror by hand
REPO=http://ftp.debian.org/debian/

unset LD_PRELOAD

$ proot -0 -b /dev -b /sys -b /proc -b /system -b /apex --link2symlink -r
deb_11/ -q qemu-i386 /bin/bash --login

(for some reason my system need /system and /apex added to proot bind
directories for qemu to function)

this worked but ssl / ca-certificates were not installed, and coreutils for
some reason needed re-install by dpkg -i /var/cache/apt/archive/pkg.deb

also debootstrap/debootstap script had termux pathes in it, so I edited
them back for normal Linux/debian pathes

after installing /etc/resolv.conf network/apt worked but building man page
index was a bit slow.

Installing libgtk2.0-dev resulted in 1.011 Gb directory

simple openssl benchmark:

root at localhost:~# openssl speed sha256
Doing sha256 for 3s on 16 size blocks: 275533 sha256's in 3.00s
Doing sha256 for 3s on 64 size blocks: 175841 sha256's in 3.00s
Doing sha256 for 3s on 256 size blocks: 65455 sha256's in 3.00s
Doing sha256 for 3s on 1024 size blocks: 20649 sha256's in 3.00s
Doing sha256 for 3s on 8192 size blocks: 2779 sha256's in 3.00s
Doing sha256 for 3s on 16384 size blocks: 1389 sha256's in 2.98s
OpenSSL 1.1.1k 25 Mar 2021
built on: Tue Aug 24 08:28:12 2021 UTC
options:bn(64,32) rc4(8x,mmx) des(long) aes(partial) blowfish(ptr)
compiler: gcc -fPIC -pthread -Wa,--noexecstack -Wall -Wa,--noexecstack -g
-O2 -ffile-prefix-map=/build/openssl-eBODPh/openssl-1.1.1k=.
-fstack-protector-strong -Wformat -Werror=format-security
-DOPENSSL_USE_NODELETE -DL_ENDIAN -DOPENSSL_PIC -DOPENSSL_CPUID_OBJ
-DOPENSSL_BN_ASM_PART_WORDS -DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT
-DOPENSSL_BN_ASM_GF2m -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DRC4_ASM
-DMD5_ASM -DRMD160_ASM -DAESNI_ASM -DVPAES_ASM -DWHIRLPOOL_ASM -DGHASH_ASM
-DECP_NISTZ256_ASM -DPOLY1305_ASM -DNDEBUG -D_LARGEFILE_SOURCE
-D_FILE_OFFSET_BITS=64 -Wdate-time -D_FORTIFY_SOURCE=2
The 'numbers' are in 1000s of bytes per second processed.
type 16 bytes 64 bytes 256 bytes 1024 bytes 8192 bytes 16384 bytes
sha256 1469.51k 3751.27k 5585.49k 7048.19k 7588.52k 7636.70k

===
$ termux-info
Application version:
unsupported
Packages CPU architecture:
arm
Subscribed repositories:
# sources.list
deb https://termux.librehat.com/apt/termux-main/ stable main
# x11-repo (sources.list.d/x11.list)
deb https://packages.termux.org/apt/termux-x11 x11 main
# science-repo (sources.list.d/science.list)
deb https://packages.termux.org/apt/termux-science science stable
# game-repo (sources.list.d/game.list)
deb https://packages.termux.org/apt/termux-games games stable
Updatable packages:
mc/stable 4.8.27-2 arm [upgradable from: 4.8.25-3]
Android version:
10
Kernel build information:
Linux localhost 4.14.141+ #1 SMP PREEMPT Fri Dec 3 19:05:26 CST 2021 armv8l
Android
Device manufacturer:
HUAWEI
Device model:
KOB2-L09
$

$ lscpu
Architecture: armv8l
  Byte Order: Little Endian
CPU(s): 8
  On-line CPU(s) list: 0-7
Vendor ID: ARM
  Model name: Cortex-A53
    Model: 4
    Thread(s) per core: 1
    Core(s) per socket: 4
    Socket(s): 2
    Stepping: r0p4
    CPU max MHz: 2001.0000
    CPU min MHz: 400.0000
    BogoMIPS: 26.00
    Flags: half thumb fastmult vfp edsp neon vfpv3 tls vfp
                        v4 idiva idivt lpae evtstrm aes pmull sha1 sha2
                         crc32
$
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