Create a Development Environment

[iulyb]

Hi,
I decided to share my adventure with you. There is some great documents about this especially this http://www.renatomorano.net/?p=1154 Many thanks to Renato Morano

My setup is a bit simpler and assume you already have a Virtual Box image like here:
https://www.zeroshell.org/forum/viewtopic.php?t=5275

With your guest off
Virtual Box -> Add New Storage Attachment. -> Hard Disk
Pick VDI and size should be about 5-8 G. Select SSD if is the case.

# We need to format and mount this.
Start ZS guest, login to console,

root@zeroshell ~> lsblk

NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT

sda      8:0    0     1G  0 disk

|-sda1   8:1    0   210M  0 part

|-sda2   8:2    0   320M  0 part /cdrom

|-sda3   8:3    0   320M  0 part

`-sda4   8:4    0   173M  0 part /DB

sdb      8:16   0     8G  0 disk

sr0     11:0    1  1024M  0 rom 

Our new space is sdb, we need to create a partition, format and mount it.

Partition:

fdisk /dev/sdb

Pick n (new) select p (primary) use 1 as partition number and allocate all space (hit enter enter for defaults)
After partition was created use w to write changes to disk
Check to make sure (note sdb1):

root@zeroshell ~> lsblk

NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT

sda      8:0    0     1G  0 disk

|-sda1   8:1    0   210M  0 part

|-sda2   8:2    0   320M  0 part /cdrom

|-sda3   8:3    0   320M  0 part

`-sda4   8:4    0   173M  0 part /DB

sdb      8:16   0     8G  0 disk

`-sdb1   8:17   0     8G  0 part

sr0     11:0    1  1024M  0 rom



# Format:

mkfs.ext4 /dev/sdb1



# Mount:

# First create a mount point that will survive reboots. (needs to be under DB)

mkdir -p /DB/devel/headers

mkdir -p /DBdevel/cdrom

mount /dev/sdb1 /DB/devel

ln -s /DB/devel /devel

df -h



####### NOt used anymore #########

#Mount /usr as RW

#cd /cdrom

#tar -czvf /DB/devel/cdrom/usr.tar.gz usr

#cd /DB/devel/cdrom

#tar -xzvf usr.tar.gz

#rm /usr

#ln -s /DB/devel/cdrom/usr /usr



cd /DB/devel/headers



At this point we need to download some stuff. ZS has all we need

wget http://mirror.switch.ch/ftp/mirror/zeroshell/gcc-4.5.2-i386.tar.bz2

wget http://mirror.switch.ch/ftp/mirror/zeroshell/gcc-include.tar.bz2

wget http://mirror.switch.ch/ftp/mirror/zeroshell/glibc-2.8-includes-zs.tar.bz2

wget http://mirror.switch.ch/ftp/mirror/zeroshell/binutils-2.17-i386.tar.bz2

wget http://mirror.switch.ch/ftp/mirror/zeroshell/static-lib-i386.tar.bz2



# Unpack..:

cat *.bz2 |tar -xjvf - -i

Here is the twist… the order is important !, there are 2 versions of gcc on these packages, we need 4.5 😉 .. so again:

tar -xjvf gcc-4.5.2-i386.tar.bz2

# Testing gcc

root@zeroshell devel> gcc -v

bash: /usr/bin/gcc: Permission denied

# Add magic glue

PATH=/DB/devel/headers/usr/bin:$PATH

Testing our work:

root@zeroshell devel> gcc -v

Using built-in specs.

COLLECT_GCC=gcc

COLLECT_LTO_WRAPPER=/DB/devel/headers/usr/bin/../libexec/gcc/i586-pc-linux-gnu/4.5.2/lto-wrapper

Target: i586-pc-linux-gnu

Configured with: ./configure --prefix=/usr --enable-languages=c,c++

Thread model: posix

gcc version 4.5.2 (GCC)

Now we are talking
Make sure gcc is 4.5 and not 3.3 !!!!!!!!!!!!

Downloading kernels

wget https://www.kernel.org/pub/linux/kernel/v4.x/linux-4.1.15.tar.gz

wget https://www.kernel.org/pub/linux/kernel/v4.x/linux-4.4.9.tar.gz



tar -xzvf linux-4.1.15.tar.gz

mkdir usr/src

mv linux-4.1.15 usr/src/



cd /DB/devel/headers/usr/lib

ln -s /cdrom/lib/libdl-2.23.so libdl.so

ldconfig



# you get :

ldconfig: File /usr/local/lib/libstdc++.so is empty, not checked.

ldconfig: File /usr/local/lib/libstdc++.so.6.0.10 is empty, not checked.

Move kernel source in place and compile it

cd /DB/devel/headers/usr/src

ln -s linux-4.1.15 linux-4.1.15-ZS

ln -s linux-4.1.15 linux

cd linux-4.1.15

make mrproper



zcat /proc/config.gz >.config

If you not upgrade kernel skip :

make oldconfig

make menuconfig 

Compile

make

Repeat same steps for the other kernel. However you will config file for 4.4.9 supplied on ZS upgrade.

Test on a module:
#### i2c

cd /DB/devel/work

wget http://pcengines.ch/file/i2cpiix4.tar.gz

tar -xzvf i2cpiix4.tar.gz

cd i2cpiix4

modinfo i2c-piix4.ko

rmmod i2c-piix4

make -C /lib/modules/$(uname -r)/build M=$(pwd) modules

#make -C /DB/devel/headers/usr/src/linux-4.4.9/modules/lib/modules/4.4.9-ZS/build M=$(pwd) modules

insmod i2c-piix4.ko



mkdir modules

make INSTALL_MOD_PATH=modules/ modules_install

#command for running kernel

make -C /lib/modules/$(uname -r)/build M=$(pwd) modules

#command for different kernel

make -C /DB/devel/headers/usr/src/linux-4.4.9/modules/lib/modules/4.4.9-ZS/build M=$(pwd)

Test our work:

modinfo xxxx.ko

Make a switch to dev script
This environment is not permanent so after each reboot we need to recreate it:
First create a location
mkdir /DB/opt
vi /DB/opt/setDevEnv.sh

Then add:

#/bin/bash

mount /dev/sdb1 /DB/devel

ln -s /DB/devel /devel

#rm /usr

#ln -s /DB/devel/cdrom/usr /usr

PATH=/devel/headers/usr/bin:$PATH

Call this script with

source /DB/opt/setDevEnv.sh

[DrmCa]

Wow, great, I’ve been struggling with getting compilation environment up for so long and never had time to figure it out. Thanks!

[Author]

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