Require autoconf-2.52.

diff --git a/m4/jm-macros.m4 b/m4/jm-macros.m4
index 6788d04..82a82c5 100644 (file)
--- a/m4/jm-macros.m4
+++ b/m4/jm-macros.m4
@@ -4,7 +4,7 @@ dnl Misc type-related macros for fileutils, sh-utils, textutils.
 
 AC_DEFUN(jm_MACROS,
 [
-  AC_PREREQ(2.49d)
+  AC_PREREQ(2.52)
 
   GNU_PACKAGE="GNU $PACKAGE"
   AC_DEFINE_UNQUOTED(GNU_PACKAGE, "$GNU_PACKAGE",