feature/pgtk 8627f73: Disable building the feature/pgtk branch

[Po Lu]

branch: feature/pgtk
commit 8627f735425c8bc97f57a1b7915e36221873862f
Author: Po Lu <luangruo@yahoo.com>
Commit: Po Lu <luangruo@yahoo.com>

    Disable building the feature/pgtk branch
    
    * configure.ac: Add notice that feature/pgtk has been
    integrated into master.
---
 configure.ac | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/configure.ac b/configure.ac
index 9a74c52..39a7b59 100644
--- a/configure.ac
+++ b/configure.ac
@@ -25,6 +25,11 @@ AC_PREREQ(2.65)
 dnl Note this is parsed by (at least) make-dist and lisp/cedet/ede/emacs.el.
 AC_INIT(GNU Emacs, 29.0.50, bug-gnu-emacs@gnu.org, , 
https://www.gnu.org/software/emacs/)
 
+AC_MSG_ERROR([[The feature/pgtk branch has been integrated into master.
+Please clone Emacs like this:
+    git clone git://git.sv.gnu.org/emacs.git
+And build Emacs from there instead.]])
+
 dnl Set emacs_config_options to the options of 'configure', quoted for the 
shell,
 dnl and then quoted again for a C string.  Separate options with spaces.
 dnl Add some environment variables, if they were passed via the environment