Index: configure.in
===================================================================
--- configure.in	(revision 54211)
+++ configure.in	(arbetskopia)
@@ -9,6 +9,15 @@
 AC_CONFIG_SRCDIR([Include/object.h])
 AC_CONFIG_HEADER(pyconfig.h)
 
+dnl Ensure that if prefix is specified, it does not end in a slah. If
+dnl it does, we get path names containing '//' which is both ugly and
+dnl can cause trouble.
+case "${prefix}" in
+  */)
+    prefix=${prefix%/}
+    ;;
+esac
+
 dnl This is for stuff that absolutely must end up in pyconfig.h.
 dnl Please use pyport.h instead, if possible.
 AH_TOP([