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8.4. pigz stage 2 2.8

Rebuild pigz in the final target environment and provide gzip and bzip2 command-name compatibility links.

Input assumption: pigz-2.8.tar.gz is already present in /sources from the chapter 4 source staging step.

Source URL: https://github.com/madler/pigz/archive/refs/tags/v2.8.tar.gz

Licenses:

zlib License

Dependencies:

musl (libc)
make

pigz is a parallel gzip-compatible compressor and decompressor. we need it to provide final stage compression tools in chapter 8 and compatibility command names for existing workflows.

Extract and Enter the Source Tree

cd /sources
tar -xf pigz-2.8.tar.gz
cd pigz-2.8

Build pigz

make $LWI_MAKE_FLAGS CC=cc

Install pigz

install -Dm755 pigz /system/binaries/pigz
install -Dm755 unpigz /system/binaries/unpigz
install -Dm644 pigz.1 /system/documentation/man-pages/man1/pigz.1

Install compatibility symlinks

ln -sf pigz /system/binaries/gzip
ln -sf unpigz /system/binaries/gunzip
ln -sf unpigz /system/binaries/zcat

ln -sf pigz /system/binaries/bzip2
ln -sf unpigz /system/binaries/bunzip2
ln -sf unpigz /system/binaries/bzcat

The bzip2-family links above provide command-name compatibility to pigz/unpigz in this layout.

After this step is complete, you can remove the extracted source directory and source tarball from /sources if you do not plan to rebuild pigz again.

Command Explanations

cd /sources, tar -xf, and cd pigz-...: Enter the staged pigz source tree.
make $LWI_MAKE_FLAGS CC=cc: Builds pigz with the target C compiler and shared make parallelism.
install -Dm755 pigz and install -Dm755 unpigz: Install compressor and decompressor commands, creating directories as needed.
install -Dm644 pigz.1: Installs the manual page.
ln -sf pigz ... gzip and ln -sf unpigz ...: Provide gzip and bzip2 family compatibility command names.

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