Commit: runtime(doc): fix GTK4 package name in src/INSTALL

[Christian Brabandt]

runtime(doc): fix GTK4 package name in src/INSTALL

Commit: https://github.com/vim/vim/commit/aee12156ee3018efcdae87a8c2c327db386f0a5d
Author: Yasuhiro Matsumoto <matt...@gmail.com>
Date: Wed May 20 18:36:11 2026 +0000

runtime(doc): fix GTK4 package name in src/INSTALL

The GTK4 section in src/INSTALL pointed at libgtk-3-dev. Use
libgtk-4-dev and note that GTK4 is not the default and requires
--enable-gui=gtk4.

closes: #20254

Signed-off-by: Yasuhiro Matsumoto <matt...@gmail.com>
Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/src/INSTALL b/src/INSTALL
index 96f32607f..054df8ac2 100644
--- a/src/INSTALL
+++ b/src/INSTALL
@@ -70,7 +70,9 @@ To build Vim on Ubuntu from scratch on a clean system using git:
% make reconfig

Add GUI (GTK4) support:
- % sudo apt install libgtk-3-dev
+ % sudo apt install libgtk-4-dev
+ (GTK4 is not the default; configure with
+ --enable-gui=gtk4 to select it.)
% make reconfig

Add Python 3 support: