Hello world.. and world.. and world... twobobs tips

twobob · 10-15-2013, 03:06 PM

I keep finding myself searching back to other threads for titbits that I keep forgetting...

So. I fully intend to just jam them all in one thread.

This one.

so.. pursuant to this. Here is post one

http://fedoraforum.org/forum/showthr...=282039&page=2

Hello world. in one or two languages

Quote:

80 examples in 35 languages.

Spoiler:

That's should be enough to get even the most obscure development effort "Hello Worlding"

twobob · 10-15-2013, 04:03 PM

building with static libstdc++ and rpaths for configure:

LDFLAGS="-Wl,-rpath,/mnt/us/extensions/thing/usr/lib -static-libstdc++" ./configure --prefix=/mnt/us/extensions/thing/usr

Aeris · 10-16-2013, 10:14 AM

Thanks for sharing!

twobob · 10-17-2013, 03:28 PM

kindle-friendly arm debian run on a local machine
https://www.mobileread.com/forums/sho...46&postcount=6

twobob · 10-17-2013, 07:38 PM

"-static-libgcc -static-libstdc++"
chatter http://gcc.gnu.org/ml/gcc-help/2011-01/msg00228.html

Linking libc statically
http://www.trilithium.com/johan/2005/06/static-libstdc/

and the LSB tools
http://www.linuxfoundation.org/colla...workgroups/lsb

This stuff is all experimental thoughts for making SID stuff run on ancient devices.

EDIT: This will probably never happen as qemu "Segmentation fault (core dumped)"
more often than not on SID... will wait for a newer qemu or maybe even throw it at Jessie.

twobob · 10-17-2013, 11:31 PM

running a custom gdb.

Quote:

PYTHONHOME=/mnt/us/extensions/python XDG_DATA_HOME=/mnt/us/extensions/midori/pixmaps XDG_CACHE_HOME=/mnt/us/extension GTK2_RC_FILES=/mnt/us/extensions/midori/pixmaps/gtkrc LD_LIBRARY_PATH=/mnt/us/extensions/midori/usr/lib:/mnt/us/extensions/gdb/lib:/usr
/lib:/lib:/mnt/us/extensions/python/usr/lib GDK_PIXBUF_MODULE_FILE=/mnt/us/extensions/midori/usr/lib/gtk-2.0/2.10.0/loaders.cache /mnt/us/extensions/gdb/bin/gdb --args /mnt/us/extensions/midori/usr/bin/midori --g-fatal-warnings

or just...

Quote:

PYTHONHOME=/mnt/us/extensions/python /mnt/us/extensions/gdb/bin/gdb --args /mnt/us/extensions/thing/usr/bin/thing --g-fatal-warnings

twobob · 10-17-2013, 11:33 PM

http://pippin.gimp.org/a_dither/

AWSOME!!

(thanks <MonkeyofDoom>)

twobob · 10-18-2013, 03:37 AM

Creating patches with diff

To create a patch for a single file:

diff -u original.c new.c > original.patch

To create a patch for an entire source tree:

diff -rupN original/ new/ > original.patch

twobob · 10-21-2013, 06:40 PM

Creating swap file (for extreme situations only)

mknod /dev/swap b 7 8 #b=block device, 7=use loop driver, 8=loop device number

mkdir /mnt/base-us/swap

cd /mnt/base-us/swap

dd if=/dev/zero of=swapfile bs=1M count=512

Quote:

512+0 records in
512+0 records out
536870912 bytes (512.0MB) copied, 269.558543 seconds, 1.9MB/s

losetup /dev/swap /mnt/base-us/swap/swapfile

mkswap /dev/swap

Quote:

Setting up swapspace version 1, size = 536866 kB
no label, UUID=4b002686-89e2-4a8d-b9b1-a947538baa3f

swapon /dev/swap

OR:

dd if=/dev/zero of=/mnt/base-us/swap.img bs=1M count=1K # 1GB!
mkswap /mnt/base-us/swap.img
swapon /mnt/base-us/swap.img

twobob · 10-21-2013, 07:38 PM

the following example will make the seed 500MB into a 2 Gb partition

FILENAME=/mnt/base-us/deb.5gb.ext3
dd if=/dev/zero of=$FILENAME bs=1M count=1500 oflag=append conv=notrunc
e2fsck -f $FILENAME
resize2fs $FILENAME

(You can choose ANY size just swap the 1500 for however many MB you want ADDED)
SEE THIS POST FOR A KINDLE DD THAT SUPPORTS THE RIGHT OPTIONS, (or do it on your PC)

That seems an efficient solution.

Alternately as pointed out by Icantbebothered:
FILENAME=/mnt/base-us/deb.5gb.ext3
dd if=/dev/zero bs=1M count=512 >> $FILENAME
e2fsck -f $FILENAME
resize2fs $FILENAME

that last command is to be used on a NON MOUNTED system only...

Spoiler:

twobob · 10-24-2013, 10:39 AM

Setting up a swapfile over NBD

on donor PC:

apt-get nbd-server
then after you make a swapfile (see dd command above)
share it.
nbd-server 1024 /home/me/STUFF-FOR-DEBIAN/swapfile (thats port 1024)

Quote:

** (process:392): WARNING **: Specifying an export on the command line is deprecated.
** (process:392): WARNING **: Please use a configuration file instead.

make it a swapfile
mkswap /home/me/STUFF-FOR-DEBIAN/swapfile

Quote:

Setting up swapspace version 1, size = 1957884 KiB
no label, UUID=2bbac2d8-d5c7-41eb-a499-064a1af85061

======================================

THEN on debian (on kindle)

dump the relevant kernel modules in /lib/modules

I needed:
https://bitbucket.org/twobob/kual-sy...b126?at=master

(if you don't do this step.. the next step will error like:
Starting NBD client process: libkmod: ERROR ../libkmod/libkmod.c:554 kmod_search_moddep: could not open moddep file '/lib/modules/2.6.31-rt11-lab126/modules.dep.bin')

then install nbd-client

root@kindle:/usr/local/src/webkit-1.8.1# apt-get install nbd-client

Quote:

Reading package lists... Done
Building dependency tree
..elided..
Setting up nbd-client (1:3.2-4~deb7u3) ...
Stopping NBD client process:
Error: Module nbd is not currently loaded
nbd-client.
Starting NBD client process: Connecting...Activating...
nbd-client.
update-initramfs: deferring update (trigger activated)
Processing triggers for initramfs-tools ...
root@kindle:/usr/local/src/webkit-1.8.1# lsmod
Module Size Used by
nbd 10564 0
g_ether 27444 0
...

so it loaded okay

next up EDIT the file in /etc/nbd-client

Quote:

# If you don't want to reconfigure this package after installing, uncomment
# the following line:
#AUTO_GEN="n"
# If you don't want the init script to kill nbd-client devices that aren't
# specified in this configuration file, set the following to "false":
KILLALL="false"
# Note that any statical settings in this file will be preserved
# regardless of the setting of AUTO_GEN, so its use is only recommended
# if you set things in a dynamical way (e.g., through a database)
#
# Name of the first used nbd /dev-entry:
NBD_DEVICE[0]=/dev/nbd0
#
# Type; s=swap, f=filesystem (with entry in /etc/fstab), r=raw (no other setup
# than to run the client)
NBD_TYPE[0]=s
#
# The host on which the nbd-server process is running
#NBD_HOST[0]=<your.server.ip.or.name>
NBD_HOST[0]=192.168.1.20
#
# The port on which this client needs to connect. Optional for
# new-style exports (which use a single port, and export names).
NBD_PORT[0]=1024
#
# The name of the export. Required for new-style exports.
#NBD_NAME[0]=swapspace
#
# Any extra parameters you would want to specify
NBD_EXTRA[0]=
# The second networked block device could look like:
# NBD_DEVICE[1]=/dev/nbd1
# NBD_TYPE[1]="f"
# NBD_HOST[1]="localhost"
# NBD_NAME[1]="disk1"
#
# You can add as many as you want, but don't skip any number in the variable
# names, or the initscript will fail.

Let's start that...

root@kindle:/usr/local/src/webkit-1.8.1# /etc/init.d/nbd-client start

Quote:

Starting NBD client process: Connecting...Negotiation: ..size = 1912MB
bs=1024, sz=2004877312 bytes
connected /dev/nbd0
Activating...
Setting up swapspace version 1, size = 1957884 KiB
no label, UUID=05bbbd40-ed4a-4ccf-94dc-ac6fffa69cd0
/dev/nbd0: swap activated.
nbd-client.

boom. Happy days.

EDIT:

This is also HIGHLY risky...
see... http://thread.gmane.org/gmane.linux.kernel.mm/62008
http://article.gmane.org/gmane.linux.kernel.mm/62008

twobob · 10-24-2013, 11:00 AM

ccache over sshfs.

This might be a stupid idea. but. meh.

figure out - on the kindle - where your ccache is stored.
for me it was /mnt/us/debian/mnt/us/home/root/.ccache

then on your PC create a folder to swap to:
mkdir -p /place/you/want/ccache (I used /home/me/ccache)

then on the kindle (not in debian)
sshfs me@dev:/home/me/ccache /mnt/us/debian/mnt/us/home/root/.ccache

and we are done

[root@kindle root]# df -h

Quote:

Filesystem Size Used Available Use% Mounted on
/dev/root 340.2M 210.3M 112.8M 65% /
...
fsp 3.2G 3.1G 26.9M 99% /mnt/us
/dev/loop/0 3.2G 3.1G 26.9M 99% /mnt/base-us
/dev/loop/debian 1.9G 1.1G 693.9M 63% /mnt/us/debian
tmpfs 124.8M 76.0K 124.8M 0% /mnt/us/debian/dev
me@dev:/home/me/ccache
233.2G 201.4G 20.0G 91% /mnt/us/debian/mnt/us/home/root/.ccache

EDIT: okay this wasn't a great idea. locked up the device.. ;P
just use sshfs for sensible things then. hehehehe

twobob · 10-24-2013, 09:57 PM

building qemu-arm statically from GIT

Clone the latest qemu from git http://git.qemu.org/qemu.git, then configure and make it

cd ~/GIT/qemu/arm-linux-user

git clone http://git.qemu.org/qemu.git

cd qemu

./configure --target-list="arm-linux-user" --disable-kvm --disable-strip --disable-xen --disable-spice --disable-werror --prefix=/usr/local --disable-bsd-user --static

make; make install

Check if we NEED to register the type with binfmt_misc...

dev binfmt_misc # cat /proc/sys/fs/binfmt_misc/qemu-arm

Code:

enabled
interpreter /usr/bin/qemu-arm-static
flags: OC
offset 0
magic 7f454c4601010100000000000000000002002800
mask ffffffffffffff00fffffffffffffffffeffffff

If this WASN'T populated... echo to register
(Only if the above is NOT already registered)

Code:

echo ":qemu-arm:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-arm:" > /proc/sys/fs/binfmt_misc/register

(note that this stipulates /usr/local/bin/qemu-arm make that w/e you want)

since I already HAVE the debian version on my system move that binary it out the way and use that binfmt_misc registration for ourselves...

mv /usr/bin/qemu-arm-static /usr/bin/qemu-arm-static-debian
cp /home/me/GIT/qemu/arm-linux-user/qemu-arm /usr/bin/qemu-arm-static

mount something we want to chroot into

sudo mount -t ext /home/me/IMAGES-FOR-DEBIAN/jessie.ext3 /mnt/jessie/

check what we built is kosher.

me@dev ~/GIT/qemu/arm-linux-user $ readelf -d ./qemu-arm

Quote:

There is no dynamic section in this file.

me@dev ~/GIT/qemu/arm-linux-user $ ./qemu-arm -version

Quote:

(as opposed to 1.0.50 in the repos)

me@dev ~/GIT/qemu/arm-linux-user $ ./qemu-arm --help

Spoiler:

Quote:

usage: qemu-arm [options] program [arguments...]
Linux CPU emulator (compiled for arm emulation)

Options and associated environment variables:

Argument Env-variable Description
-h print this help
-g port QEMU_GDB wait gdb connection to 'port'
-L path QEMU_LD_PREFIX set the elf interpreter prefix to 'path'
-s size QEMU_STACK_SIZE set the stack size to 'size' bytes
-cpu model QEMU_CPU select CPU (-cpu help for list)
-E var=value QEMU_SET_ENV sets targets environment variable (see below)
-U var QEMU_UNSET_ENV unsets targets environment variable (see below)
-0 argv0 QEMU_ARGV0 forces target process argv[0] to be 'argv0'
-r uname QEMU_UNAME set qemu uname release string to 'uname'
-B address QEMU_GUEST_BASE set guest_base address to 'address'
-R size QEMU_RESERVED_VA reserve 'size' bytes for guest virtual address space
-d item[,...] QEMU_LOG enable logging of specified items (use '-d help' for a list of items)
-D logfile QEMU_LOG_FILENAME write logs to 'logfile' (default stderr)
-p pagesize QEMU_PAGESIZE set the host page size to 'pagesize'
-singlestep QEMU_SINGLESTEP run in singlestep mode
-strace QEMU_STRACE log system calls
-version QEMU_VERSION display version information and exit

Defaults:
QEMU_LD_PREFIX = /usr/gnemul/qemu-arm
QEMU_STACK_SIZE = 8388608 byte

You can use -E and -U options or the QEMU_SET_ENV and
QEMU_UNSET_ENV environment variables to set and unset
environment variables for the target process.
It is possible to provide several variables by separating them
by commas in getsubopt(3) style. Additionally it is possible to
provide the -E and -U options multiple times.
The following lines are equivalent:
-E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG
-E var1=val2,var2=val2 -U LD_PRELOAD,LD_DEBUG
QEMU_SET_ENV=var1=val2,var2=val2 QEMU_UNSET_ENV=LD_PRELOAD,LD_DEBUG
Note that if you provide several changes to a single variable
the last change will stay in effect.

copy it into our debian victim

cp /usr/bin/qemu-arm-static /home/me/IMAGES-FOR-DEBIAN/usr/bin/qemu-arm-static

chroot in

sudo chroot /mnt/debian /bin/bash

Quote:

root@dev:/#cat /etc/debian_version
jessie/sid

For reference...
Debian build log
https://buildd.debian.org/status/fet...amp=1322591568
What those build warnings mean to end users.
https://lists.gnu.org/archive/html/q.../msg04789.html

seems to work okay.

brianinmaine · 10-25-2013, 06:04 AM

Quote:

Originally Posted by twobob

Creating patches with diff

To create a patch for a single file:

diff -u original.c new.c > original.patch

To create a patch for an entire source tree:

diff -rupN original/ new/ > original.patch

Sorry to bump your thread - do I have to 'make clean' or something before I make a patch? the patch is huge after I just make something... also, for someone reading, a simple install of a patch file:
"patch -p1 -b < file.patch" works well for me...

twobob · 10-25-2013, 08:04 AM

I guess you can either:

make clean Delete most generated files
make distclean Remove editor backup files, patch leftover files and whatnot
Or (if you have one like in a kernel build) make mrproper Delete the current configuration, and all generated files.

Check the makefile for the cleansing options available.
Generally, making a copy of finished project and the original source is never a terrible idea. and cleaning / diffing those.

10-17-2013, 03:28 PM	#4
twobob ( ͡° ͜ʖ ͡°){ʇlnɐɟ ƃǝs}Týr Posts: 6,586 Karma: 6299991 Join Date: Jun 2012 Location: uti gratia usura (Yao ying da ying; Mo ying da yieng) Device: PW-WIFI\|K5-3G+WIFI\| K4\|K3-3G\|DXG\|K2\| Rooted Nook Touch	kindle-friendly arm debian run on a local machine https://www.mobileread.com/forums/sho...46&postcount=6 Last edited by twobob; 10-17-2013 at 08:30 PM.

10-17-2013, 07:38 PM	#5
twobob ( ͡° ͜ʖ ͡°){ʇlnɐɟ ƃǝs}Týr Posts: 6,586 Karma: 6299991 Join Date: Jun 2012 Location: uti gratia usura (Yao ying da ying; Mo ying da yieng) Device: PW-WIFI\|K5-3G+WIFI\| K4\|K3-3G\|DXG\|K2\| Rooted Nook Touch	"-static-libgcc -static-libstdc++" chatter http://gcc.gnu.org/ml/gcc-help/2011-01/msg00228.html Linking libc statically http://www.trilithium.com/johan/2005/06/static-libstdc/ and the LSB tools http://www.linuxfoundation.org/colla...workgroups/lsb This stuff is all experimental thoughts for making SID stuff run on ancient devices. EDIT: This will probably never happen as qemu "Segmentation fault (core dumped)" more often than not on SID... will wait for a newer qemu or maybe even throw it at Jessie. Last edited by twobob; 10-17-2013 at 07:55 PM.

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10-15-2013, 04:03 PM	#2
twobob ( ͡° ͜ʖ ͡°){ʇlnɐɟ ƃǝs}Týr Posts: 6,586 Karma: 6299991 Join Date: Jun 2012 Location: uti gratia usura (Yao ying da ying; Mo ying da yieng) Device: PW-WIFI\|K5-3G+WIFI\| K4\|K3-3G\|DXG\|K2\| Rooted Nook Touch	building with static libstdc++ and rpaths for configure: LDFLAGS="-Wl,-rpath,/mnt/us/extensions/thing/usr/lib -static-libstdc++" ./configure --prefix=/mnt/us/extensions/thing/usr

10-16-2013, 10:14 AM	#3
Aeris Developer's Corner Mascot Posts: 486 Karma: 1277790 Join Date: Sep 2013 Device: Kindle Paperwhite 5.3.4, Kindle Keyboard 3.4	Thanks for sharing!

10-17-2013, 11:33 PM	#7
twobob ( ͡° ͜ʖ ͡°){ʇlnɐɟ ƃǝs}Týr Posts: 6,586 Karma: 6299991 Join Date: Jun 2012 Location: uti gratia usura (Yao ying da ying; Mo ying da yieng) Device: PW-WIFI\|K5-3G+WIFI\| K4\|K3-3G\|DXG\|K2\| Rooted Nook Touch	http://pippin.gimp.org/a_dither/ AWSOME!! (thanks <MonkeyofDoom>)

10-18-2013, 03:37 AM	#8
twobob ( ͡° ͜ʖ ͡°){ʇlnɐɟ ƃǝs}Týr Posts: 6,586 Karma: 6299991 Join Date: Jun 2012 Location: uti gratia usura (Yao ying da ying; Mo ying da yieng) Device: PW-WIFI\|K5-3G+WIFI\| K4\|K3-3G\|DXG\|K2\| Rooted Nook Touch	Creating patches with diff To create a patch for a single file: diff -u original.c new.c > original.patch To create a patch for an entire source tree: diff -rupN original/ new/ > original.patch

10-25-2013, 08:04 AM	#15
twobob ( ͡° ͜ʖ ͡°){ʇlnɐɟ ƃǝs}Týr Posts: 6,586 Karma: 6299991 Join Date: Jun 2012 Location: uti gratia usura (Yao ying da ying; Mo ying da yieng) Device: PW-WIFI\|K5-3G+WIFI\| K4\|K3-3G\|DXG\|K2\| Rooted Nook Touch	I guess you can either: make clean Delete most generated files make distclean Remove editor backup files, patch leftover files and whatnot Or (if you have one like in a kernel build) make mrproper Delete the current configuration, and all generated files. Check the makefile for the cleansing options available. Generally, making a copy of finished project and the original source is never a terrible idea. and cleaning / diffing those.

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