# HG changeset patch
# User Jim Meyering <jim@meyering.net>
# Date 999634947 0
# Node ID 266d7c495179ce3c30ec560186d46ee3f534f999
# Parent  0c2f03a44db3dafd703dc78b430051718f49bb5a
(jm_PREREQ_XREADLINK): New macro.
(jm_PREREQ): Use it.

diff --git a/m4/prereq.m4 b/m4/prereq.m4
--- a/m4/prereq.m4
+++ b/m4/prereq.m4
@@ -20,6 +20,7 @@
   jm_PREREQ_REGEX
   jm_PREREQ_TEMPNAME # called by mkstemp
   jm_PREREQ_XGETCWD
+  jm_PREREQ_XREADLINK
 ])
 
 AC_DEFUN([jm_PREREQ_ADDEXT],
@@ -148,3 +149,9 @@
   AC_CHECK_FUNCS(getcwd)
   AC_FUNC_GETCWD_NULL
 ])
+
+AC_DEFUN([jm_PREREQ_XREADLINK],
+[
+  AC_C_PROTOTYPES
+  AC_CHECK_HEADERS(limits.h stdlib.h sys/types.h unistd.h)
+])