h1. Nexus One Build

This explains how to build Replicant for the Nexus One. 

h2. Prerequisites

Before building, you must make sure:
* You have installed the [[BuildDependenciesInstallation]]
* You have downloaded Replicant 2.2 or Replicant 2.3 sources: [[ReplicantSourceCode]]
* Your sources are up to date: [[ReplicantSourceCode#DownloadingUpdating-the-source-from-the-repos|Downloading/Updating the source from the repos]]
* You are in the directory where the sources were downloaded
 
h2. Warning

*Do not build as root, always build as user.*

h2. Building

Setup the build environment: 
<pre>
source build/envsetup.sh
lunch replicant_passion-eng
export ANDROID_JAVA_HOME=$JAVA_HOME
</pre>

Start the build:
<pre>
parallel_tasks=$(echo "$(grep 'processor' /proc/cpuinfo | wc -l ) + 1" | bc)
make -j$parallel_tasks distimages
</pre>

The -jn argument is to indicate the number of parallel tasks during the build. 
You can remove it from the command line to have only one task at a time. With fast hardware, best results will come with @-j9@, @-j16@ and @-j32@.

h2. Output files

Find the produced files:
* built target images: @out/target/product/passion/@
* built host tools: @out/host/linux-x86/bin/@