Merge branch 'PHP-8.4'

* PHP-8.4:
  Fix GH-19681 PHP_EXPAND_PATH broken with bash 5.3.0

Author: remicollet

build/php.m4

@@ -54,7 +54,11 @@ AC_DEFUN([PHP_EXPAND_PATH],[
     changequote({,})
     ep_dir=$(echo $1|$SED 's%/*[^/][^/]*/*$%%')
     changequote([,])
-    ep_realdir=$(cd "$ep_dir" && pwd)
+    if test -z $ep_dir ; then
+      ep_realdir=$(pwd)
+    else
+      ep_realdir=$(cd "$ep_dir" && pwd)
+    fi
     $2="$ep_realdir"/$(basename "$1")
   fi
 ])