From 2e86054b29a9c1ebe16fc246b33adb7c5e771684 Mon Sep 17 00:00:00 2001
From: Dave Mielke <Dave@Mielke.cc>
Date: Tue, 10 Dec 2024 13:05:18 -0500
Subject: [PATCH] Tcl-8.6.15 has changed the TCL_PACKAGE_PATH delimiter from
 spaces to a colon.

---
 Bindings/Tcl/bindings.m4 | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/Bindings/Tcl/bindings.m4 b/Bindings/Tcl/bindings.m4
index edb59a72e..a30d1945e 100644
--- a/Bindings/Tcl/bindings.m4
+++ b/Bindings/Tcl/bindings.m4
@@ -51,8 +51,20 @@ fi
 
 ${TCL_OK} && {
    test -n "${TCL_PACKAGE_PATH}" && {
-      for directory in ${TCL_PACKAGE_PATH}
+      directories="${TCL_PACKAGE_PATH}"
+
+      test "${directories#*:}" = "${directories}" && {
+         # There's no colon so it's an old-style (before tcl-8.6.15) path.
+         # Replace each sequence of one or more spaces with a single colon.
+         directories="${directories// /:}"
+      }
+
+      while test "${#directories}" -gt 0
       do
+         directory="${directories%%:*}"
+         directories="${directories#*:}"
+         test "${#directory}" -eq 0 && continue
+
          test `expr "${directory}" : '.*/lib'` -eq 0 || {
             TCL_DIR="${directory}"
             break