Linux From Scratch (w/Pacman) - Version r12.3-6-wip

Chapter 7. Entering Chroot and Building Additional Temporary Tools

7.13. Bzip2-1.0.8

The Bzip2 package contains programs for compressing and decompressing files. Compressing text files with bzip2 yields a much better compression percentage than with the traditional gzip.

Approximate build time: less than 0.1 SBU
Required disk space: 7.2 MB

7.13.1. Installation of Bzip2

The following command ensures installation of symbolic links are relative: 

sed -i 's@\(ln -s -f \)$(PREFIX)/bin/@\1@' Makefile

Prepare Bzip2 for compilation with: 

make -f Makefile-libbz2_so
make clean

The meaning of the make parameter:

-f Makefile-libbz2_so

This will cause Bzip2 to be built using a different Makefile file, in this case the Makefile-libbz2_so file, which creates a dynamic libbz2.so library and links the Bzip2 utilities against it.

Compile and test the package: 

make

Install the programs: 

make PREFIX=/usr install

Install the shared library: 

cp -av libbz2.so.* /usr/lib
ln -sv libbz2.so.1.0.8 /usr/lib/libbz2.so

Install the shared bzip2 binary into the /usr/bin directory, and replace two copies of bzip2 with symlinks: 

cp -v bzip2-shared /usr/bin/bzip2
for i in /usr/bin/{bzcat,bunzip2}; do
  ln -sfv bzip2 $i
done

Remove a useless static library: 

rm -fv /usr/lib/libbz2.a