====== Cross Compile Environment for DNS-323 ======

**Please feel free to update, cleanup or correct this page**

What is this?
This document shows how to build the D-LINK DNS-323 GPL
toolchain, kernel and u-boot loader


**Things you will need first**
  * Development System x86 based Debian based "Ubuntu Dapper"
  * You will need the following tools: **bison flex gcc-3.4 byacc g++-3.4 gettext patch**
    * Check your active compiler version with **gcc -v**
    * If your compiler is newer then gcc-3.4 then change the /usr/bin/gcc symlink to point to **/usr/bin/gcc-3.4** for building the toolchain - **restore it when you are done**
    * If g++ is newer than version 3.4 also change the /usr/bin/g++ symlink accordingly.
  * Make sure **libncurses5-dev** is installed or you'll get termcap not found error
  * Create a directory to build your source in
<code bash>
mkdir GPL
</code>
  * Create a directory to download the sources into
<code bash>
mkdir GPL/zips
</code>
  * Change into the GPL directory
<code bash>
cd GPL
</code>
  * Download and extract my {{howto:build_dns323.tgz|build_dns323.tgz}} the GPL directory
<code bash>
tar xzf build_dns323.tgz
</code>

  * Download the GPL sources:
<code bash>
./wget_GPL
</code>

  * Build the **ARM UCLIBC toolchain**

Fix the bug in the script **build_uclibc**: on line 24, replace .tar.gz with .tgz (obviously the extension of the tarballs changed)

The path to the gcc sources has changed, so we need to fix it:

<code bash>
tar xzf zips/uclibc-toolchain-src-20040609.tgz
</code>

edit the file:  uclibc-toolchain-src-20040609/gcc-3.3.x/make/gcc-uclibc-3.3.mk
Change the so that the path defined on line 23 reads: 
\\ 
\\ GCC_SITE:=ftp://ftp.gnu.org/gnu/gcc/gcc-$(GCC_VERSION)
\\
\\ Now, since we have already uncompressed the tar file, we comment out lines 23 and 24 of build_uclibc by adding a # to that start of each line.
\\ Save the modified file, then run the script:
<code bash>
./build_uclibc
</code>

And now you must fix your symlinks. cd to $GPL/uclibc-toolchain-src-20040609/gcc-3.3.x/toolchain_arm/arm-linux-uclibc/lib and fix all broken links:

<code bash>
   for lib in crypt dl m nsl pthread resolv rt thread_db util; do ln -sf lib${lib}-* lib${lib}.so; done
   ln -sf libuClibc-0.9.28.so libc.so
</code>

**Note** For each build script below - extract the corresponding file from the zips directory. Example:
<code bash>
   tar xzf zips/linux-2.6.12.6.tgz
</code>
This creates a directory called **linux-2.6.12.6** that **build_kernel**
knows about. 


  * Build the **ARM kernel**
fix bug in script **build_kernel**: on line 5, replace linux-2.6.6 by linux-2.6.12.6

<code bash>
./build_kernel
</code>

  * Build the **u-boot loader**
<code bash>
./build_u-boot
</code>
  * Build **busybox**
The script needs a change; add line **export CC=arm-linux-gcc**, then execute.
<code bash>
./build_busybox
</code>

  * Build **at**
<code bash>
./build_at
</code>

**Notes:**

The **./build_uclibc** script creates a script called **setpath** that can be used
to compile other **ARM uclibc** programs later on.

Many of the remaining D-LINK sources have not been configured for being cross-compiled.  In fact, the "Readme.txt" file they supply with the GPL sources has instruction that are just plain wrong.