GLib-2.58.3

#### Beyond Linux® From Scratch - Version 2019-02-27

### Chapter 9. General Libraries

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# GLib-2.58.3

## Introduction to GLib

The GLib package contains low-level libraries useful for providing data structure handling for C, portability wrappers and interfaces for such runtime functionality as an event loop, threads, dynamic loading and an object system.

This package is known to build and work properly using an LFS-8.4 platform.

### Package Information

- Download (HTTP): http://ftp.gnome.org/pub/gnome/sources/glib/2.58/glib-2.58.3.tar.xz

- Download (FTP): ftp://ftp.gnome.org/pub/gnome/sources/glib/2.58/glib-2.58.3.tar.xz

- Download MD5 sum: 8058c7bde846dcffe5fa453eca366d73

- Download size: 4.6 MB

- Estimated disk space required: 190 MB (add 4 MB for tests)

- Estimated build time: 0.5 SBU (add 1.6 SBU for tests; both using paralleism=4)

### Additional Downloads

- Optional patch: http://www.linuxfromscratch.org/patches/blfs/svn/glib-2.58.3-skip_warnings-1.patch

### GLib Dependencies

#### Recommended

libxslt-1.1.33 and PCRE-8.42 (built with Unicode properties)

#### Optional

dbus-1.12.12 and bindfs (both may be used in some tests), GDB-8.2.1 (for bindings), docbook-xml-4.5, docbook-xsl-1.79.2, and GTK-Doc-1.29 (to build API documentation)

#### Additional Runtime Dependencies

gobject-introspection-1.58.3 (should be installed before gtk+, atk, etc.)

Quoted directly from the `INSTALL` file: “Some of the mimetype-related functionality in GIO requires the update-mime-database and update-desktop-database utilities”, which are part of shared-mime-info-1.10 and desktop-file-utils-0.23, respectively. These two utilities are also needed for some tests.

User Notes: http://wiki.linuxfromscratch.org/blfs/wiki/glib2

## Installation of GLib

If desired, apply the optional patch. In many cases, applications that use this library, either directly or indirectly via other libraries such as GTK+-3.24.5, output numerous warnings when run from the command line. This patch enables the use of an environment variable, GLIB_LOG_LEVEL, that supresses unwanted messages. The value of the variable is a digit that corresponds to:

1 Alert
2 Critical
3 Error
4 Warning
5 Notice

For instance GLIB_LOG_LEVEL=4 will skip output of Warning and Notice messages (and Info/Debug messages if they are turned on). If GLIB_LOG_LEVEL is not defined, normal message output will not be affected.

    patch -Np1 -i ../glib-2.58.3-skip_warnings-1.patch

### Warning

If upgrading from a previous version of GLib that was built using autotools, and the libtool archives (.la files) were installed, you will need to adjust all installed libtool archives, `/usr/lib/libg{io,lib,module,object,thread}-2.0.la`, to replace references to the libtool archives for this package with the appropriate linker library flag (-l), -lg{io,lib,module,object,thread}. 600+ files must be modified on a complete gnome desktop.

Alternatively, you can just remove the unneeded .la files with the script at Libtool archive (.la) files.

Install GLib by running the following commands:

    mkdir build-glib &&
    cd    build-glib &&

    meson --prefix=/usr   \
          -Dman=true      \
          -Dselinux=false \
          ..              &&
    ninja

The GLib test suite requires desktop-file-utils for some tests. However, desktop-file-utils requires GLib in order to compile; therefore, you must first install GLib and then run the test suite.

Now, as the `root` user:

### Note

If libxslt-1.1.33 is installed, the following command may indicate several (about 33) errors that start with "Error: no ID for constraint linkend:" when installing the man pages. These are harmless.

    ninja install &&

    mkdir -p /usr/share/doc/glib-2.58.3 &&
    cp -r ../docs/reference/{NEWS,gio,glib,gobject} /usr/share/doc/glib-2.58.3

You should now install desktop-file-utils-0.23 and proceed to run the test suite.

To test the results, after having installed the package, issue: ninja test. One test, gdatetime, is known to fail on sysvinit systems.

## Command Explanations

`-Dman=true`: This switch causes the build to create and install the package man pages.

`-Dselinux=false`: This switch disables support for selinux which is not supported in BLFS.

`-Ddoc=true`: This switch causes the build to create and install the API documentation.

## Contents

Installed Programs: gapplication, gdbus, gdbus-codegen, gio, gio-launch-desktop, gio-querymodules, glib-compile-resources, glib-compile-schemas, glib-genmarshal, glib-gettextize, glib-mkenums, gobject-query, gresource, gsettings, gtester, and gtester-report
Installed Libraries: libgio-2.0.so, libglib-2.0.so, libgmodule-2.0.so, libgobject-2.0.so, and libgthread-2.0.so
Installed Directories: /usr/include/gio-unix-2.0, /usr/include/glib-2.0, /usr/lib/glib-2.0, /usr/share/glib-2.0, and /usr/share/gtk-doc/html/{gio,glib,gobject}

### Short Descriptions

gapplication | can be used to start applications and to send messages to already-running instances of other applications.
gdbus | is a simple tool used for working with D-Bus objects.
gdbus-codegen | is used to generate code and/or documentation for one or more D-Bus interfaces.
gio | is a utility that makes many GIO features available from the command line.
gio-querymodules | is used to create a `giomodule.cache` file in the listed directories. This file lists the implemented extension points for each module that has been found.
glib-compile-resources | is used to read the resource description from a file and the files that it references to create a binary resource bundle that is suitable for use with the GResource API.
glib-compile-schemas | is used to compile all the GSettings XML schema files in a directory into a binary file with the name `gschemas.compiled` that can be used by GSettings.
glib-genmarshal | is a C code marshaller generation utility for GLib closures.
glib-gettextize | is a variant of the gettext internationalization utility.
glib-mkenums | is a C language enum description generation utility.
gobject-query | is a small utility that draws a tree of types.
gresource | offers a simple command line interface to GResource.
gsettings | offers a simple command line interface to GSettings.
gtester | is a test running utility.
gtester-report | is a test report formatting utility.
GLib libraries | contain low-level core libraries for the GIMP Toolkit.

Last updated on 2019-02-15 15:01:29 -0600

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