Edit: We have now a temporary git repository at gitorious: http://gitorious.org/replicant h2. Before starting * Root your phone * Backup your current system!!! * Install git h2. Setting up the build environment and getting source code These instructions assume that you are building replicant in your home directory (~). If you are building it in another directory, modify path names accordingly. h3. Get the repo tool repo is a front-end to git which is used to manage several git repositories. 
 mkdir bin
 cd bin
 wget http://android.git.kernel.org/repo
 chmod a+x repo
 cd ..
h3. Check out the Replicant repository This step will download the Android source (minus the kernel) and the Replicant patches. 
 mkdir replicant
 cd replicant
 ../bin/repo init -u git://gitorious.org/replicant/manifest.git -b replicant
 ../bin/repo sync
h2. Optional: building the kernel and wireless LAN driver By default, the Android build system uses a pre-compiled kernel and wireless driver rather than compiling these components from scratch. If you want to compile your own copy of either of these components, you have to compile both: the wireless driver sources included with Android are incompatible with the pre-compiled kernel. h3. Get the kernel source To download the kernel sources, create a file in your replicant/.repo directory called "local_manifest.xml" containing the following:
Then from the ~/replicant/ directory, run: 
../bin/repo sync
This will create a directory called replicant/kernel and download the kernel sources to it. h3. Build the kernel To build the kernel: 
cd ~/replicant/kernel
export ARCH=arm
export CROSS_COMPILE=arm-eabi-
export PATH=$PATH:~/replicant/prebuilt/linux-x86/toolchain/arm-eabi-4.2.1/bin
cp arch/arm/configs/msm_defconfig .config
make oldconfig && make
Wait several hours. h3. Point the build system to your kernel Create a file called @~/replicant/buildspec.mk@ containing the following: 
TARGET_PRODUCT:=htc_dream
TARGET_PREBUILT_KERNEL:=kernel/arch/arm/boot/zImage
This will instruct the build process to use your kernel rather than the pre-compiled kernel. h3. Build the wifi module To build the wifi module: 
cd ~/replicant/system/wlan/ti/sta_dk_4_0_4_32
export KERNEL_DIR=~/replicant/kernel/
make
(If make can't find your compiler, re-run same PATH export command you ran before compiling the kernel.) Replace the pre-built wifi module with the one you just built: 
cp wlan.ko ~/replicant/vendor/htc/dream-open
h2. Build the firmware h3. Change the build scripts to include some important missing packages _(This section will be removed once these changes are committed to the replicant repository)_ 
 PRODUCT_PACKAGES := \
 Calculator \
 Email \
 [[ImProvider]] \
 [[SdkSetup]] \
 [[VoiceDialer]]



This will include packages in the build which would otherwise be missing (including the [[SdkSetup]] package, which will enable incoming calls).


cd ~/replicant
make



Wait and wait and wait.


h2. Flashing the new firmware


[to be written]


h2. Building individual pieces



h3. Each time you want to build something

* open a new console
* Then type:

 cd ~/replicant
 source build/envsetup.sh
 export ANDROID_JAVA_HOME=$JAVA_HOME
 lunch htc_dream-eng
 make


* The files to flash are in ~/replicant/out/target/product/dream,flash them and then clear the cache
* boot and push the wifi firmware if you want it



h3. If you want to build a particular project

* open a new console
* build everything if it was not done before
* Then type:

 cd ~/replicant
 source build/envsetup.sh
 export ANDROID_JAVA_HOME=$JAVA_HOME
 lunch htc_dream-eng
 #go into the directory containing an Android.mk
 mm




h2. error workarrounds ==
 hyts_Foo.c ===
if you have:

target Java: [[SettingsProvider]] (out/target/common/obj/APPS/SettingsProvider_intermediates/classes)
target Java: Settings (out/target/common/obj/APPS/Settings_intermediates/classes)
java.util.zip.ZipException: duplicate entry: hyts_Foo.c
	at java.util.zip.ZipOutputStream.putNextEntry(ZipOutputStream.java:192)
	at java.util.jar.JarOutputStream.putNextEntry(JarOutputStream.java:109)
	at sun.tools.jar.Main.addFile(Main.java:731)
	at sun.tools.jar.Main.update(Main.java:585)
	at sun.tools.jar.Main.run(Main.java:220)
	at sun.tools.jar.Main.main(Main.java:1167)
make: *** [out/target/common/obj/JAVA_LIBRARIES/core-tests_intermediates/javalib.jar] Error 1
make: *** Deleting file @out/target/common/obj/JAVA_LIBRARIES/core-tests_intermediates/javalib.jar'
make: *** Waiting for unfinished jobs....
Note: frameworks/base/packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.



do that:

rm -f dalvik/libcore/luni/src/test/resources/hyts_Foo.c


And it will continue to build

Note that that:

rm -rf dalvik/libcore/dom/src/test/resources/*
rm -rf dalvik/libcore/xml/src/test/resources/*


didn't work

The workarrounds came from "here":http://groups.google.com/group/android-porting/browse_thread/thread/c51d436b2b1edc8d/b320ee78b2ddd0e4 and "here":http://lazyhack.net/tag/emulator/

h3. No rule to make target @development/data/etc/apns-conf_sdk.xml'

if you have:

make: *** No rule to make target @development/data/etc/apns-conf_sdk.xml', needed by @out/target/product/dream-open/system/etc/apns-conf.xml'.  Stop.
make: *** Waiting for unfinished jobs....


simply re-type make and it should continue