From f7a58aee36d7fe17657b6eea6f30806050e0571d Mon Sep 17 00:00:00 2001
From: Yasuhiro Matsumoto <mattn.jp@gmail.com>
Date: Wed, 20 May 2026 18:01:52 +0000
Subject: [PATCH] patch 9.2.0504: configure: requires X11 libraries for GTK4
 build

Problem:  configure: requires X11 libraries for GTK4 build
          (after v9.2.0501)
Solution: Allow to build GTK4 even when no X11 libraries are present
          (Yasuhiro Matsumoto)

GTK4 does not use X11 APIs directly; the X11 backend is loaded by
GTK4 at runtime. Skip the X11 dependency enforcement when the user
explicitly passes --enable-gui=gtk4 so the build can succeed on
systems without X11 development headers.

closes: #20265

Co-authored-by: Claude <noreply@anthropic.com>
Signed-off-by: Yasuhiro Matsumoto <mattn.jp@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
---
 src/auto/configure | 4 ++--
 src/configure.ac   | 4 ++--
 src/version.c      | 2 ++
 3 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/auto/configure b/src/auto/configure
index ff4d5e361c..69b1a39ef0 100755
--- a/src/auto/configure
+++ b/src/auto/configure
@@ -5193,7 +5193,7 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam \
 
             CPPFLAGS="$CPPFLAGS -DMACOS_X_DARWIN"
 
-               if test -z "$with_x" -a "X$enable_gui" != Xmotif -a "X$enable_gui" != Xgtk2 -a "X$enable_gui" != Xgtk3; then
+               if test -z "$with_x" -a "X$enable_gui" != Xmotif -a "X$enable_gui" != Xgtk2 -a "X$enable_gui" != Xgtk3 -a "X$enable_gui" != Xgtk4; then
       with_x=no
      fi
   fi
@@ -10469,7 +10469,7 @@ if test "x$with_x" = xno -a "x$with_x_arg" = xyes; then
     as_fn_error $? "could not configure X" "$LINENO" 5
 fi
 
-test "x$with_x" = xno -a "x$HAIKU" != "xyes" -a "x$MACOS_X" != "xyes" -a "x$QNX" != "xyes" && enable_gui=no
+test "x$with_x" = xno -a "x$HAIKU" != "xyes" -a "x$MACOS_X" != "xyes" -a "x$QNX" != "xyes" -a "x$enable_gui" != xgtk4 && enable_gui=no
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking --enable-gui argument" >&5
 printf %s "checking --enable-gui argument... " >&6; }
diff --git a/src/configure.ac b/src/configure.ac
index a808530d24..a49c6d26b9 100644
--- a/src/configure.ac
+++ b/src/configure.ac
@@ -330,7 +330,7 @@ if test "$vim_cv_uname_output" = Darwin; then
 
      dnl Assume we don't want X11 unless it was specifically asked for
      dnl (--with-x) or Motif or GTK GUI is used.
-     if test -z "$with_x" -a "X$enable_gui" != Xmotif -a "X$enable_gui" != Xgtk2 -a "X$enable_gui" != Xgtk3; then
+     if test -z "$with_x" -a "X$enable_gui" != Xmotif -a "X$enable_gui" != Xgtk2 -a "X$enable_gui" != Xgtk3 -a "X$enable_gui" != Xgtk4; then
       with_x=no
      fi
   fi
@@ -2609,7 +2609,7 @@ if test "x$with_x" = xno -a "x$with_x_arg" = xyes; then
     AC_MSG_ERROR([could not configure X])
 fi
 
-test "x$with_x" = xno -a "x$HAIKU" != "xyes" -a "x$MACOS_X" != "xyes" -a "x$QNX" != "xyes" && enable_gui=no
+test "x$with_x" = xno -a "x$HAIKU" != "xyes" -a "x$MACOS_X" != "xyes" -a "x$QNX" != "xyes" -a "x$enable_gui" != xgtk4 && enable_gui=no
 
 AC_MSG_CHECKING(--enable-gui argument)
 AC_ARG_ENABLE(gui,
diff --git a/src/version.c b/src/version.c
index c989738312..e07f50f04a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -729,6 +729,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    504,
 /**/
     503,
 /**/