6.25. Zlib-1.2.3

The Zlib package contains compression and decompression routines used by some programs.

Approximate build time: less than 0.1 SBU
Required disk space: 3.1 MB

6.25.1. Installation of Zlib



Zlib is known to build its shared library incorrectly if CFLAGS is specified in the environment. If using a specified CFLAGS variable, be sure to add the -fPIC directive to the CFLAGS variable for the duration of the configure command below, then remove it afterwards.

Prepare Zlib for compilation:

./configure --prefix=/usr --shared --libdir=/lib

Compile the package:


To test the results, issue: make check.

Install the shared library:

make install

The previous command installed a .so file in /lib. We will remove it and relink it into /usr/lib:

rm -v /lib/libz.so
ln -sfv ../../lib/libz.so.1.2.3 /usr/lib/libz.so

Build the static library:

make clean
./configure --prefix=/usr

To test the results again, issue: make check.

Install the static library:

make install

Fix the permissions on the static library:

chmod -v 644 /usr/lib/libz.a

6.25.2. Contents of Zlib

Installed libraries: libz.{a,so}

Short Descriptions


Contains compression and decompression functions used by some programs