master f0ff20be51: * src/emacs.c (main): Improve accuracy of daemon warning message on PGTK.

[Po Lu]

branch: master
commit f0ff20be51980731364ef5ccf0505c35ea1b4e78
Author: Po Lu <luangruo@yahoo.com>
Commit: Po Lu <luangruo@yahoo.com>

    * src/emacs.c (main): Improve accuracy of daemon warning message on PGTK.
---
 src/emacs.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/src/emacs.c b/src/emacs.c
index 2a4dcc2c2c..acb409fcb7 100644
--- a/src/emacs.c
+++ b/src/emacs.c
@@ -1734,12 +1734,25 @@ main (int argc, char **argv)
        sockfd = SD_LISTEN_FDS_START;
 #endif /* HAVE_LIBSYSTEMD */
 
-#ifdef USE_GTK
+      /* On X, the bug happens because we call abort to avoid GLib
+        crashes upon a longjmp in our X error handler.
+
+         On PGTK, GTK calls exit in its own error handlers for either
+         X or Wayland.  Display different messages depending on the
+         window system to avoid referring users to the wrong GTK bug
+         report.  */
+#ifdef HAVE_PGTK
+      fputs ("Due to a limitation in GTK 3, Emacs built with PGTK will simply 
exit when a"
+            "display connection is closed."
+            "\nThere is no way to fix this problem, so if you want to use 
Emacs on Wayland"
+            "on multiple displays and have Emacs survive disconnects, you 
lose.",
+            stderr);
+#elif defined USE_GTK
       fputs ("\nWarning: due to a long standing Gtk+ 
bug\nhttps://gitlab.gnome.org/GNOME/gtk/issues/221\n\
 Emacs might crash when run in daemon mode and the X11 connection is 
unexpectedly lost.\n\
 Using an Emacs configured with --with-x-toolkit=lucid does not have this 
problem.\n",
             stderr);
-#endif /* USE_GTK */
+#endif
 
       if (daemon_type == 2)
         {