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docs: Mention dependency cycle between GLib and gobject-introspection

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And how to break that cycle.

Signed-off-by: Philip Withnall <philip@tecnocode.co.uk>

Helps: #3037
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Philip Withnall 2023-10-23 11:26:09 +01:00
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@ -108,6 +108,17 @@ libraries.
where GLib installs the SystemTap probes, using the
`-Dtapset_install_dir=DIR` option.
- [gobject-introspection](https://gitlab.gnome.org/GNOME/gobject-introspection/)
is needed to generate introspection data for consumption by other projects,
and to generate the GLib documentation via
[gi-docgen](https://gitlab.gnome.org/GNOME/gi-docgen). There is a dependency
cycle between GLib and gobject-introspection. This can be broken by building
GLib first with `-Dintrospection=disabled`, then building
gobject-introspection against this copy of GLib, then re-building GLib against
the new gobject-introspection with `-Dintrospection=enabled`. The GLib API
documentation can be built during this second build process if
`-Dgtk_doc=true` is also set.
## Extra Configuration Options
In addition to the normal options, these additional ones are supported when