giflib-5.2.2

#### Beyond Linux® From Scratch (systemd Edition) - Version 12.2

### Chapter 10. Graphics and Font Libraries

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# giflib-5.2.2

## Introduction to giflib

The giflib package contains libraries for reading and writing GIFs as well as programs for converting and working with GIF files.

This package is known to build and work properly using an LFS 12.2 platform.

### Package Information

- Download (HTTP): https://sourceforge.net/projects/giflib/files/giflib-5.2.2.tar.gz

- Download MD5 sum: 913dd251492134e235ee3c9a91987a4d

- Download size: 440 KB

- Estimated disk space required: 4.0 MB (with documentation)

- Estimated build time: less than 0.1 SBU (with documentation)

### Additional Downloads

- Required patch: https://www.linuxfromscratch.org/patches/blfs/12.2/giflib-5.2.2-upstream_fixes-1.patch

### giflib Dependencies

#### Required

xmlto-0.0.29

## Installation of giflib

First, prevent the build process from installing XML files instead of man pages:

    patch -Np1 -i ../giflib-5.2.2-upstream_fixes-1.patch

Next, remove an unnecessary dependency on ImageMagick-7.1.1-36 by moving a file into an expected location:

    cp pic/gifgrid.gif doc/giflib-logo.gif

Install giflib by running the following commands:

    make

This package does not come with a test suite.

Now, as the `root` user:

    make PREFIX=/usr install &&

    rm -fv /usr/lib/libgif.a &&

    find doc \( -name Makefile\* -o -name \*.1 \
             -o -name \*.xml \) -exec rm -v {} \; &&

    install -v -dm755 /usr/share/doc/giflib-5.2.2 &&
    cp -v -R doc/* /usr/share/doc/giflib-5.2.2

## Command Explanations

rm -fv /usr/lib/libgif.a: This command removes a static library which is not used by any BLFS package.

find doc ... -exec rm -v {} \;: This command removes `Makefiles`, man and xml files from the documentation directory that would otherwise be installed by the commands that follow.

## Contents

Installed Programs: gif2rgb, gifbuild, gifclrmp, giffix, giftext, and giftool
Installed Library: libgif.so
Installed Directory: /usr/share/doc/giflib-5.2.2

### Short Descriptions

gif2rgb | converts images saved as GIF to 24-bit RGB images
gifbuild | dumps GIF data in a textual format, or undumps it to a GIF
gifclrmp | modifies GIF image colormaps
giffix | clumsily attempts to fix truncated GIF images
giftext | prints (text only) general information about a GIF file
giftool | is a GIF transformation tool
`libgif.so` | contains API functions required by the giflib programs and any other programs needing library functionality to read, write and manipulate GIF images

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