zlibをソースコードビルドする ref: http://qiita.com/boscoworks/items/a27a74e5da8adc3c1be8

file0.txt

wget http://zlib.net/zlib-1.2.8.tar.gz -P /usr/local/share/downloaded/

file1.txt

tar -zxvf /usr/local/share/downloaded/zlib-1.2.8.tar.gz -C /usr/local/src/

file2.txt

cd /usr/local/src/zlib-1.2.8/

./configure --prefix=/usr/local/lib/zlib-1.2.8

file3.txt

make

file4.txt

sudo make install

file5.txt

sudo ln -s /usr/local/lib/zlib-1.2.8 /usr/local/zlib

file6.txt

echo "/usr/local/lib/zlib-1.2.8/lib" > /usr/local/etc/ld.so.conf.d/zlib-1.2.8.conf

sudo ln -s /usr/local/etc/ld.so.conf.d/zlib-1.2.8.conf /etc/ld.so.conf.d/zlib-1.2.8.conf

sudo ldconfig

file7.txt

sudo rm -r /usr/local/share/downloaded/zlib-1.2.8.tar.gz
sudo rm -r /usr/local/src/zlib-1.2.8/
sudo rm -r usr/local/lib/zlib-1.2.8/
sudo rm -r /usr/local/zlib
sudo rm -r /usr/local/etc/ld.so.conf.d/zlib-1.2.8.conf
sudo rm -r /etc/ld.so.conf.d/zlib-1.2.8.conf

file8.txt

sudo ldconfig