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docs: Add note on command line arguments

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We don't parse them any more, and developers should stop using them when
migrating from GTK3 to GTK4.
This commit is contained in:
Emmanuele Bassi 2020-09-10 17:53:50 +01:00
parent aff788e583
commit 790733673f
1 changed files with 9 additions and 0 deletions
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docs/reference/gtk/migrating-3to4.md
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@ -49,6 +49,15 @@ application, e.g.:
G_ENABLE_DIAGNOSTIC=1 ./your-app
```
### Do not use GTK-specific command line arguments
GTK4 does not parse command line arguments any more. If you are using
command line arguments like `--gtk-debug` you should use the `GTK_DEBUG`
environment variable instead. If you are using `--g-fatal-warnings` for
debugging purposes, you should use the `G_DEBUG` environment variable, as
specified by the
[GLib documentation](https://developer.gnome.org/glib/stable/glib-running.html).
### Do not use widget style properties
Style properties do not exist in GTK 4. You should stop using them in