#### Beyond Linux® From Scratch (System V Edition) - Version 12.1

### Chapter 9. General Libraries

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# libportal-0.7.1

## Introduction to libportal

The libportal package provides a library that contains GIO-style async APIs for most Flatpak portals.

This package is known to build and work properly using an LFS 12.1 platform.

### Package Information

- Download (HTTP): https://github.com/flatpak/libportal/releases/download/0.7.1/libportal-0.7.1.tar.xz

- Download MD5 sum: f94be41e8495ae7d6aaed046481daa61

- Download size: 76 KB

- Estimated disk space required: 3.0 MB (with tests)

- Estimated build time: 0.1 SBU (add 0.3 SBU for tests)

### Additional Downloads

- Optional patch (required for running the test suite): https://www.linuxfromscratch.org/patches/blfs/12.1/libportal-0.7.1-testsuite_fix-1.patch

### libportal Dependencies

#### Required

gobject-introspection-1.78.1

#### Recommended

GTK+-3.24.41 and GTK-4.12.5

#### Recommended (Runtime)

To make this package really useful, install xdg-desktop-portal-1.18.2, xdg-desktop-portal-gtk-1.15.1, xdg-desktop-portal-gnome-45.1 (if running a GNOME desktop environment), and xdg-desktop-portal-lxqt-0.5.0 (if running a LXQt desktop environment). They are not needed if only using this package to satisfy a build dependency.

#### Optional

Gi-DocGen-2023.3 (for documentation), dbusmock-0.30.2 and pytest-8.0.0 (for testing), (Qt-5.15.12 or qt-alternate-5.15.12) (for the Qt5 version of libportal), and Vala-0.56.14

## Installation of libportal

### Warning

If a previous version of libportal is installed, move the headers out of the way so that later packages do not encounter conflicts (as the `root` user):

    if [ -e /usr/include/libportal ]; then
        rm -rf /usr/include/libportal.old &&
        mv -vf /usr/include/libportal{,.old}
    fi

If running the test suite, apply a patch to fix a dozen of test failures with python-dbusmock 0.30.0 or later:

    patch -Np1 -i ../libportal-0.7.1-testsuite_fix-1.patch

Install libportal by running the following commands:

    mkdir build &&
    cd    build &&

    meson setup --prefix=/usr --buildtype=release -Ddocs=false .. &&
    ninja

If you have Gi-DocGen-2023.3 installed and wish to build the API documentation for this package, issue:

    sed "/output/s/-1/-0.7.1/" -i ../doc/meson.build &&
    meson configure -Ddocs=true                    &&
    ninja

To test the results, issue: ninja test. Note that additional `dbus-daemon` processes may need to be killed after the tests are run.

Now, as the `root` user:

    ninja install

## Command Explanations

`--buildtype=release`: Specify a buildtype suitable for stable releases of the package, as the default may produce unoptimized binaries.

`-Ddocs=false`: Allow building this package without Gi-DocGen-2023.3 installed. If you have Gi-DocGen-2023.3 installed and you wish to rebuild and install the API documentation, a meson configure command will reset this option.

## Contents

Installed Programs: None
Installed Libraries: libportal.so, libportal-gtk3.so, libportal-gtk4.so, and libportal-qt5.so
Installed Directories: /usr/include/libportal and /usr/share/gtk-doc/html/libportal

### Short Descriptions

`libportal.so` | provides GIO-style async APIs for most Flatpak portals
`libportal-gtk3.so` | provides GTK+-3 specific functions for interacting with Flatpak portals
`libportal-gtk4.so` | provides GTK-4 specific functions for interacting with Flatpak portals
`libportal-qt5.so` | provides Qt5 specific functions for interacting with Flatpak portals

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