Introduction to Gcr

The Gcr package contains libraries used for displaying certificates and accessing key stores. It also provides the viewer for crypto files on the GNOME Desktop.



Development versions of BLFS may not build or run some packages properly if LFS or dependencies have been updated since the most recent stable versions of the books.

Package Information

Gcr Dependencies


GLib-2.80.4 (GObject Introspection recommended), libgcrypt-1.11.0, and p11-kit-0.25.5



Gi-DocGen-2024.1 and Valgrind-3.23.0

Installation of Gcr

Install Gcr by running the following commands:

sed -i 's:"/desktop:"/org:' schema/*.xml &&

mkdir build &&
cd    build &&

meson setup --prefix=/usr       \
            --buildtype=release \
            -Dgtk_doc=false     \
            -Dssh_agent=false   \
            ..                  &&

If you have Gi-DocGen-2024.1 installed and wish to build the API documentation for this package, issue:

sed -e "/install_dir/s@,\$@ / 'gcr-3.41.2'&@" \
    -i ../docs/*/meson.build                  &&
meson configure -Dgtk_doc=true                &&

To test the results, issue: ninja test. The tests must be run from an X Terminal or similar.

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.

-Dssh_agent=false: Prevent a conflict with Gcr-4.3.0. Omit this switch if you do not plan to install Gcr-4.3.0 and you want to use gcr-ssh-agent.

-Dgtk=false: Use this switch if you haven't installed GTK+-3.24.43. Note that gcr-viewer will not be installed if this is passed to meson.

-Dgtk_doc=true: Allow building this package without Gi-DocGen-2024.1 installed. If you have Gi-DocGen-2024.1 installed and you wish to rebuild and install the API documentation, a meson configure command will reset this option.


Installed Program: gcr-viewer
Installed Libraries: libgck-1.so, libgcr-base-3.so and libgcr-ui-3.so
Installed Directories: /usr/include/gck-1, /usr/include/gcr-3, and /usr/share/gtk-doc/html/{gcr,gck}

Short Descriptions


is used to view certificates and key files


contains GObject bindings for PKCS#11