(ptrdiff_t): Typedef to long when configure didn't find

it.

diff --git a/libguile/__scm.h b/libguile/__scm.h
index f5e7ed3..fd67075 100644 (file)
--- a/libguile/__scm.h
+++ b/libguile/__scm.h
@@ -279,6 +279,10 @@ typedef unsigned long long ulong_long;
  * - ... add more
  */
 
+#ifndef HAVE_PTRDIFF_T
+typedef long ptrdiff_t;
+#endif
+
 #ifdef HAVE_LIMITS_H
 # include <limits.h>
 #endif