(jm_PREREQ_XREADLINK): New macro.

(jm_PREREQ): Use it.

diff --git a/m4/prereq.m4 b/m4/prereq.m4
index 62b8cf89f7927f4e0868cf4e248459c954a01155..eeaf32d878c7d1e8908d55e40a065434dbd43072 100644 (file)
--- a/m4/prereq.m4
+++ b/m4/prereq.m4
@@ -20,6 +20,7 @@ AC_DEFUN([jm_PREREQ],
   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_DEFUN([jm_PREREQ_XGETCWD],
   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)
+])