Linux® From Scratch - Quality of Life (System V Edition) - Version #1549

Chapter 2. General Libraries

yajl-2.1.0

Introduction to yajl

The yajl package provides a JSON library.

Additional Downloads

yajl Dependencies

Required

CMake

Installation of yajl

Since the last commit to this package is almost a decade old, issues have came up and need to be fixed before building. Apply required patches to fix the important ones: 

patch -Np1 -i ../yajl-2.1.0-CVE-2017-16516.patch &&
patch -Np1 -i ../yajl-2.1.0-CVE-2022-24795.patch &&
patch -Np1 -i ../yajl-2.1.0-memory_leak.patch

Fix building with CMake-4.0.0: 

patch -Np1 -i ../6fe59ca50dfd65bdb3d1c87a27245b2dd1a072f9.patch

Install yajl by running the following commands: 

mkdir build &&
cd    build &&

cmake -D CMAKE_INSTALL_PREFIX=/usr   \
      -D CMAKE_BUILD_TYPE=Release    \
      -D BUILD_SHARED_LIBS=ON        \
      -D CMAKE_SKIP_INSTALL_RPATH=ON \
      -W no-dev -G Ninja .. &&

ninja

Now, as the root user: 

ninja install &&
rm -vf /usr/lib/libyajl_s.a

Command Explanations

-D CMAKE_SKIP_INSTALL_RPATH=ON: This switch makes cmake remove hardcoded library search paths (rpath) when installing a binary executable file or a shared library. This package does not need rpath once it's installed into the standard location, and rpath may sometimes cause unwanted effects or even security issues.

rm -vf /usr/lib/libyajl_s.a: This command removes a useless static library.

Contents

Installed Programs: json_reformat and json_verify
Installed Libraries: libyajl
Installed Directories: /usr/include/yajl

Short Descriptions

json_reformat

reformats JSON from STDIN

json_verify

validates JSON from STDIN

libyajl

provides functions that can help with parsing JSON in C