Monday, October 31, 2011

Building PHP from Scratch

This post by Rahul Amaram describes how to build PHP for Android from scratch and how it can later be used within PAW.
I've added links to the needed files at the end of the post.

Thanks to Rahul for putting this together!

Here is Rahul's documentation...



It is suggested to use a VM for compilation so that you can take snapshots at regular intervals. Also as per google recommendation, it is suggested to use a VM with at least 8 GB RAM/swap and 12 GB of free hard disk.

Install Ubuntu 10.04 64-bit (select username as "joschi") on a VM.

After booting ubuntu, login as joschi.

Download and extract android-php

$ cd
$ wget -c "http://paw-android.fun2code.de/download/android-php.zip"
$ sudo apt-get install unzip
$ unzip android-php.zip

First initialize build environment. For donut, java 5 is needed. Also compiling with gcc/g++ 4.4 was throwing errors during compilation. Therefore we use gcc/g++ 4.3 for compilation.

$ sudo apt-get install python-software-properties
$ sudo add-apt-repository "deb http://archive.ubuntu.com/ubuntu hardy main multiverse"
$ sudo add-apt-repository "deb http://archive.ubuntu.com/ubuntu hardy-updates main multiverse"
$ sudo apt-get update
$ sudo apt-get install sun-java5-jdk


$ sudo apt-get install git-core gnupg flex bison gperf build-essential \
zip curl zlib1g-dev libc6-dev lib32ncurses5-dev ia32-libs \
x11proto-core-dev libx11-dev lib32readline5-dev lib32z-dev \
libgl1-mesa-dev g++-multilib mingw32 tofrodos python-markdown \
libxml2-utils


$ sudo apt-get install g++-4.3-multilib

Download Android source
This will be about 3 GB.

$ mkdir ~/bin
$ PATH=~/bin:$PATH
$ curl https://dl-ssl.google.com/dl/googlesource/git-repo/repo > ~/bin/repo
$ chmod a+x ~/bin/repo


$ mkdir ~/android-donut-src
$ cd ~/android-donut-src
$ repo init -u https://android.googlesource.com/platform/manifest -b android-1.6_r2
$ repo sync

It is a good idea to take snapshot of the VM here.

Build Android

$ cd /usr/bin
$ sudo ln -sf cpp-4.3 cpp
$ sudo ln -sf g++-4.3 g++
$ sudo ln -sf gcc-4.3 gcc
$ sudo ln -sf gcov-4.3 gcov
$ sudo ln -sf cpp-4.3 x86_64-linux-gnu-cpp
$ sudo ln -sf g++-4.3 x86_64-linux-gnu-g++
$ sudo ln -sf gcc-4.3 x86_64-linux-gnu-gcc


$ cd ~/android-donut-src
$ source build/envsetup.sh
$ lunch generic-eng
$ make -j4

It is a good idea to take another snapshot of the VM here.

Next build android-php. The patch is applied in order to avoid the error "undefined reference to `__sync_fetch_and_add_4'" during compilation.

$ cd ~/android-php
$ rm -rf ~/android-donut-src/bionic/libc/include/
$ unzip -d ~/android-donut-src/bionic/libc/ bionic_libc_include.zip
$ patch php-5.3.6/ext/standard/php_crypt_r.c < ~/sync_fetch_and_add.patch
$ ./build_php_5.3.sh

Finally copy php-5.3.6/sapi/cgi/php-cgi to /mnt/sdcard/paw/html/app/plugins/php_plugin/bin/ on your android phone (be sure to backup the existing php-cgi file), and install PHP using the PAW Web App.

References:



Files:
android-php.zip
sync_fetch_and_add.patch

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