php7-qemu-mips-build.sh

#!/bin/bash
### 
# Shows build-steps used when attempting to build PHP 7 in an
# emulated MIPS chroot jail
#
# To build PHP in a MIPS chroot jail with this script:
#
#     mkdir php7-qemu-mips-build && cd php7-qemu-mips-build/
#     wget https://gist.githubusercontent.com/ramsey/8ba95a871c75c3aad820/raw/php7-qemu-mips-build.sh
#     chmod +x php7-qemu-mips-build.sh
#     vagrant init ubuntu/trusty64
#     vagrant up
#     vagrant ssh
#     cd /vagrant
#     sudo ./php7-qemu-mips-build.sh 7.0.2 mips mips wheezy
#
# That last step will take quite a while. Building anything
# in an emulated MIPS environment is slow. When it's done, the
# created chroot jail will be in:
#
#     /tmp/chroot/mips-wheezy-php-7.0.2
#
# Run commands through the chroot jail:
#
#     sudo chroot /tmp/chroot/mips-wheezy-php-7.0.2 php --version
#
# Core dumps may be found in /php-src/php-7.0.2 of the chroot jail.
#

if [ $EUID -ne 0 ]; then
   echo "This script must be run as root" 1>&2
   exit 1
fi

### settings
php_version=${1:-7.0.2}
qemu_arch=${2:-mips}
deb_arch=${3:-mips}
suite=${4:-wheezy}

chroot_dir="/tmp/chroot/${qemu_arch}-${suite}-php-${php_version}"
apt_mirror="http://ftp.us.debian.org/debian"
php_package="https://secure.php.net/distributions/php-${php_version}.tar.bz2"


### make sure that the required tools are installed
export DEBIAN_FRONTEND=noninteractive
apt-get update
apt-get install -y wget debootstrap qemu-user-static binfmt-support

### install a minbase system with debootstrap
debootstrap --foreign --arch=$deb_arch $suite $chroot_dir $apt_mirror
cp "/usr/bin/qemu-${qemu_arch}-static" $chroot_dir/usr/bin/
chroot $chroot_dir ./debootstrap/debootstrap --second-stage

### update the list of package sources
cat <<EOF > $chroot_dir/etc/apt/sources.list
deb $apt_mirror $suite main contrib non-free
deb $apt_mirror $suite-updates main contrib non-free
deb http://security.debian.org/ $suite/updates main contrib non-free
EOF

### upgrade packages
chroot $chroot_dir apt-get update -qq
chroot $chroot_dir apt-get upgrade -qq -y

### locale configuration
chroot $chroot_dir apt-get install -qq -y debconf
chroot $chroot_dir bash -c 'echo "en_US.UTF-8 UTF-8" >> /etc/locale.gen'
chroot $chroot_dir dpkg-reconfigure locales

### Set up the chroot for debugging segmentation fault
chroot $chroot_dir apt-get install -qq -y gdb

### install dependencies to build PHP
chroot $chroot_dir apt-get --allow-unauthenticated install -qq -y \
    autoconf build-essential libcurl3-openssl-dev libgmp-dev libmcrypt-dev \
    libreadline-dev libxml2-dev uuid-dev curl git

### download, build, and install the PHP version needed for this chroot
mkdir -p $chroot_dir/php-src
cd $chroot_dir/php-src
wget $php_package
tar xf "php-${php_version}.tar.bz2"
chroot $chroot_dir bash -c "cd /php-src/php-${php_version} && ./configure --disable-all --enable-bcmath --with-gmp --disable-cgi --enable-xml --enable-libxml --enable-dom --enable-filter --enable-ctype --enable-json --with-openssl --enable-phar --enable-hash --with-curl --enable-simplexml --enable-tokenizer --enable-xmlwriter --enable-zip"
chroot $chroot_dir bash -c "ulimit -c unlimited && cd /php-src/php-${php_version} && make && make install"
chroot $chroot_dir cp "/php-src/php-${php_version}/php.ini-development" /usr/local/lib/php.ini

### cleanup
chroot $chroot_dir apt-get autoclean
chroot $chroot_dir apt-get clean
chroot $chroot_dir apt-get autoremove

echo "Done!"