# HG changeset patch
# User Jim Meyering <jim@meyering.net>
# Date 947665050 0
# Node ID e42471ea7843fa7d77b5c23a482b1bf0574fff8e
# Parent  3452e04c3ee99343f0d487fbb45c357ccf7db2a2
(jm_PREREQ_READUTMP): New macro.
(jm_PREREQ): Use it.

diff --git a/m4/prereq.m4 b/m4/prereq.m4
--- a/m4/prereq.m4
+++ b/m4/prereq.m4
@@ -8,6 +8,7 @@
   jm_PREREQ_CANON_HOST
   jm_PREREQ_ERROR
   jm_PREREQ_QUOTEARG
+  jm_PREREQ_READUTMP
   jm_PREREQ_REGEX
 ])
 
@@ -35,6 +36,14 @@
   AM_C_PROTOTYPES
 ])
 
+AC_DEFUN(jm_PREREQ_READUTMP,
+[
+  AC_HEADER_STDC
+  AC_CHECK_HEADERS(string.h utmpx.h sys/param.h)
+  AC_CHECK_FUNCS(utmpname)
+  AM_C_PROTOTYPES
+])
+
 AC_DEFUN(jm_PREREQ_REGEX,
 [
   dnl FIXME: Maybe provide a btowc replacement someday: solaris-2.5.1 lacks it.