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[[Category:OtherOS]]
=Cross Compiling=
=Cross Compiling=


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To know how many cores you have available use :
To know how many cores you have available use :


{{keyboard|content=<syntaxhighlight lang="bash">grep -c '^processor' /proc/cpuinfo</syntaxhighlight>}}
<pre>
grep -c '^processor' /proc/cpuinfo
</pre>


This will be used later on while building the toolchain ct-ng build.#number of cores and while compiling export CONCURRENCY_LEVEL=#number of cores.
This will be used later on while building the toolchain ct-ng build.#number of cores and while compiling export CONCURRENCY_LEVEL=#number of cores.
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Example for a quadcore system :
Example for a quadcore system :


{{keyboard|content=<syntaxhighlight lang="bash">
<pre>
ct-ng build.4
ct-ng build.4
CONCURRENCY_LEVEL=4
CONCURRENCY_LEVEL=4
</syntaxhighlight>}}
</pre>




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Install required packages :
Install required packages :
{{keyboard|content=<syntaxhighlight lang="bash">sudo apt-get install build-essential gawk bison flex automake libtool cvs lzma ncurses-dev texinfo patch g++ gcj mercurial git-core</syntaxhighlight>}}
 
<pre>
sudo apt-get install build-essential gawk bison flex automake libtool cvs lzma ncurses-dev texinfo patch g++ gcj mercurial git-core
</pre>


Add the enviromental variable to bash :
Add the enviromental variable to bash :
{{keyboard|content=<syntaxhighlight lang="bash">sudo vi /etc/bash.bashrc</syntaxhighlight>}}
 
<pre>
sudo vi /etc/bash.bashrc
 
or
or
{{keyboard|content=<syntaxhighlight lang="bash">vi /home/user/.bashrc</syntaxhighlight>}}


vi /home/user/.bashrc
</pre>


Add the following lines at the end of the file :
Add the following lines at the end of the file :


{{keyboard|content=<syntaxhighlight lang="bash">
 
export PATH="${PATH}:/home/user/crosstool/bin/"
export PATH="${PATH}:/home/user/crosstool/bin/"
export PATH="${PATH}:/home/user/x-tools/powerpc64-unknown-linux-gnu/bin/"
export PATH="${PATH}:/home/user/x-tools/powerpc64-unknown-linux-gnu/bin/"
export CONCURRENCY_LEVEL=#number
export CONCURRENCY_LEVEL=#number
</syntaxhighlight>}}




Create directories and compile crosstool :
Create directories and compile crosstool :


{{keyboard|content=<syntaxhighlight lang="bash">
<pre>
mkdir /home/user/crosstool
mkdir /home/user/crosstool
mkdir /home/user/kernel
mkdir /home/user/kernel
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hg clone http://crosstool-ng.org/hg/crosstool-ng
hg clone http://crosstool-ng.org/hg/crosstool-ng
cd crosstool-ng
cd crosstool-ng
./configure --prefix=/home/user/crosstool
./configure --prefix=/home/user/crosstool/
make && make install
make && make install
</syntaxhighlight>}}
</pre>


* /home/user/crosstool-ng/ -> '''crosstool-ng sources'''
* /home/user/crosstool-ng/ -> '''crostool-ng sources'''
* /home/user/crosstool/ -> '''Crosstool install directory with binaries'''
* /home/user/crosstool/ -> '''Crosstool install directory with binaries'''
* /home/user/toolchain/ -> '''Directory where the binary will be installed'''
* /home/user/toolchain/ -> '''Directory where the binary will be installed'''
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Go to that directory and apply the patch :
Go to that directory and apply the patch :


{{keyboard|content=<syntaxhighlight lang="bash">
<pre>
cd /home/user/crosstool/lib/ct-ng-yourcrosstoolversion/scripts/build
cd /home/user/crosstool/lib/ct-ng-yourcrosstoolversion/scripts/build
patch < important.patch
patch < important.patch
</syntaxhighlight>}}
</pre>


===Creating a cross compiler toolchain for ppc64===
===Creating a cross compiler toolchain for ppc64===
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Download graf_chokolo's kernel :
Download graf_chokolo's kernel :


{{keyboard|content=<syntaxhighlight lang="bash">
<pre>
cd /home/user/kernel
cd /home/user/kernel
git clone git://git.gitbrew.org/ps3/ps3linux/linux-2.6.git
git clone git://git.gitbrew.org/ps3/ps3linux/linux-2.6.git
tar -zcvf linux-2.6.tar.gz linux-2.6/
tar -zcvf linux-2.6.tar.gz linux-2.6/
</syntaxhighlight>}}
</pre>


Copy the sample configuration file and modify it :
Copy the sample configuration file and modify it :


{{keyboard|content=<syntaxhighlight lang="bash">
<pre>
cp /home/user/crosstool/lib/ct-ng-yourcrosstoolversion/samples/powerpc64-unknown-linux-gnu/* /home/user/toolchain/powerpc/
cp /home/user/crosstool/lib/ct-ng-yourcrosstoolversion/samples/powerpc64-unknown-linux-gnu/* /home/user/toolchain/powerpc/
cd /home/user/toolchain/powerpc/
cd /home/user/toolchain/powerpc/
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cd /home/user/toolchain/powerpc/
cd /home/user/toolchain/powerpc/
ct-ng menuconfig
ct-ng menuconfig
</syntaxhighlight>}}
</pre>


I've added graf_chokolos kernel :
I've added graf_chokolos kernel :
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Start from scratch and configure the toolchain the way you want :
Start from scratch and configure the toolchain the way you want :


{{keyboard|content=<syntaxhighlight lang="bash">
<pre>
cd /home/user/toolchain/powerppc/
cd /home/user/toolchain/powerppc/
ct-ng menuconfig
ct-ng menuconfig
</syntaxhighlight>}}
</pre>


Compile ppc64 toolchain :
Compile ppc64 toolchain :


{{keyboard|content=<syntaxhighlight lang="bash">
<pre>
unset LD_LIBRARY_PATH LIBRARY_PATH CPATH
unset LD_LIBRARY_PATH LIBRARY_PATH CPATH
export LD_LIBRARY_PATH LIBRARY_PATH CPATH
export LD_LIBRARY_PATH LIBRARY_PATH CPATH
ct-ng build.#number
ct-ng build.#number
</syntaxhighlight>}}
</pre>


'''Wait for some time until it finishes compiling'''
'''Wait for some time until it finishes compiling'''
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===Testing if your toolchain works properly===
===Testing if your toolchain works properly===
 
<pre>
{{keyboard|content=<syntaxhighlight lang="bash">
export PATH="${PATH}:/home/user/x-tools/powerpc64-unknown-linux-gnu/bin/"
export PATH="${PATH}:/home/user/x-tools/powerpc64-unknown-linux-gnu/bin/"
powerpc64-unknown-linux-gnuspe-gcc test.c -o test
powerpc64-unknown-linux-gnuspe-gcc test.c -o test
</syntaxhighlight>}}
</pre>


More info: http://www.ibm.com/developerworks/linux/tutorials/l-embedded-distro/section3.html
More info: http://www.ibm.com/developerworks/linux/tutorials/l-embedded-distro/section3.html
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Download openssl sources
Download openssl sources
{{keyboard|content=<syntaxhighlight lang="bash">wget http://www.openssl.org/source/openssl-0.9.8g.tar.gz</syntaxhighlight>}}
<pre>
wget http://www.openssl.org/source/openssl-0.9.8g.tar.gz
</pre>


unpack the sources :
unpack the sources :
{{keyboard|content=<syntaxhighlight lang="bash">tar -zxvf openssl-0.9.8g.tar.gz</syntaxhighlight>}}
 
<pre>
tar -zxvf openssl-0.9.8g.tar.gz
</pre>


Go to openssl source path :
Go to openssl source path :
{{keyboard|content=<syntaxhighlight lang="bash">cd openssl-0.9.8g/</syntaxhighlight>}}
 
<pre>
cd openssl-0.9.8g/
</pre>


Change the following lines in the Makefile :
Change the following lines in the Makefile :
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Finally :
Finally :
{{keyboard|content=<syntaxhighlight lang="bash">make</syntaxhighlight>}}


<pre>
make
</pre>


===Cross compiling graf_chokolo's tools===
===Cross compiling graf_chokolo's tools===
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Finally :
Finally :


{{keyboard|content=<syntaxhighlight lang="bash">make</syntaxhighlight>}}
<pre>
make
</pre>


You can find graf_chokolo tools and scripts here :
You can find graf_chokolo tools and scripts here :
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Go to the directory where you saved your kernel, untar it and go to the kernel source directory :
Go to the directory where you saved your kernel, untar it and go to the kernel source directory :
{{keyboard|content=<syntaxhighlight lang="bash">
 
<pre>
cd /home/user/kernel
cd /home/user/kernel
tar xfvz linux-2.6.tar.gz
tar xfvz linux-2.6.tar.gz
cd linux-2.6
cd linux-2.6
</syntaxhighlight>}}
</pre>


It is a good measure to clean the source directory :
It is a good measure to clean the source directory :
{{keyboard|content=<syntaxhighlight lang="bash">
 
<pre>
make clean
make clean
make-kpkg clean
make-kpkg clean
</syntaxhighlight>}}
</pre>


Export set ARCH=powerpc
Export set ARCH=powerpc
And set the right number of concurrent jobs to be done this is used to improve the building time :
And set the right number of concurrent jobs to be done this is used to improve the building time :


{{keyboard|content=<syntaxhighlight lang="bash">
<pre>
export ARCH=powerpc
export ARCH=powerpc
export CONCURRENCY_LEVEL=4
export CONCURRENCY_LEVEL=4
</syntaxhighlight>}}
</pre>
 


Use graf_chokolo config file :
Use graf_chokolo config file :
{{keyboard|content=<syntaxhighlight lang="bash">
 
<pre>
cp ps3_linux_config .config
cp ps3_linux_config .config
make oldconfig
make oldconfig
</syntaxhighlight>}}
</pre>


You can customize your by using make menuconfig.
You can customize your by using make menuconfig.
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Now lets compile and package our kernel :
Now lets compile and package our kernel :


{{keyboard|content=<syntaxhighlight lang="bash">make-kpkg --arch=powerpc --cross-compile=powerpc64-unknown-linux-gnu- --rootcmd=fakeroot --initrd --append-to-version=-graf kernel_image kernel_source kernel_headers</syntaxhighlight>}}
<pre>
 
make-kpkg --arch=powerpc --cross-compile=powerpc64-unknown-linux-gnu- --rootcmd=fakeroot --initrd --append-to-version=-graf kernel_image kernel_source kernel_headers
 
</pre>
 
 
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