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docs: Add a section on version checking macros

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This is a port to GLib of changes originally made in the GTK copy of
these docs, at https://gitlab.gnome.org/GNOME/gtk/-/commit/72b0a4431d04.

(Copied across by Philip Withnall.)

Helps: #3037
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Emmanuele Bassi 2023-12-12 13:57:49 +00:00 committed by Philip Withnall
parent 1375967813
commit 9a2de39044
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docs/reference/glib/macros.md
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@ -868,3 +868,29 @@ by application programmers.
: A macro that should be defined before including the `glib.h` header.
If it is defined, no compiler warnings will be produced for uses
of deprecated GLib APIs.
## Version checking
`GLIB_MAJOR_VERSION`
: A macro that evaluates to the major component of the version of GLib,
e.g. `1` for version `1.2.3`.
`GLIB_MINOR_VERSION`
: A macro that evaluates to the minor component of the version of GLib,
e.g. `2` for version `1.2.3`.
`GLIB_MICRO_VERSION`
: A macro that evaluates to the micro component of the version of GLib,
e.g. `3` for version `1.2.3`.
`GLIB_CHECK_VERSION (major, minor, micro)`
: A macro that evaluates to true if the version of GLib is newer than
the given version tuple.