warn-on-use: use instead of link-warning

[pspp] / m4 / sys_utsname_h.m4

diff --git a/m4/sys_utsname_h.m4 b/m4/sys_utsname_h.m4
index 84b781f85ec96e66ac4875e63daddb7270562f1d..bdb54475b9b55ab5ceb40eced5ec4883c44e330b 100644 (file)
--- a/m4/sys_utsname_h.m4
+++ b/m4/sys_utsname_h.m4
@@ -1,5 +1,5 @@
-# sys_utsname_h.m4 serial 2
-dnl Copyright (C) 2009 Free Software Foundation, Inc.
+# sys_utsname_h.m4 serial 4
+dnl Copyright (C) 2009, 2010 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -15,7 +15,6 @@ AC_DEFUN([gl_SYS_UTSNAME_H],
   gl_CHECK_NEXT_HEADERS([sys/utsname.h])
   AC_CHECK_HEADERS_ONCE([sys/utsname.h])
   if test $ac_cv_header_sys_utsname_h != yes; then
-    SYS_UTSNAME_H='sys/utsname.h'
     HAVE_SYS_UTSNAME_H=0
     HAVE_STRUCT_UTSNAME=0
   else
@@ -25,6 +24,11 @@ AC_DEFUN([gl_SYS_UTSNAME_H],
       ]])
   fi
   AC_SUBST([HAVE_SYS_UTSNAME_H])
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use.
+  gl_WARN_ON_USE_PREPARE([[#include <sys/utsname.h>
+    ]], [uname])
 ])
 
 AC_DEFUN([gl_SYS_UTSNAME_MODULE_INDICATOR],
@@ -40,5 +44,4 @@ AC_DEFUN([gl_SYS_UTSNAME_H_DEFAULTS],
   dnl Assume proper GNU behavior unless another module says otherwise.
   HAVE_UNAME=1;           AC_SUBST([HAVE_UNAME])
   HAVE_STRUCT_UTSNAME=1;  AC_SUBST([HAVE_STRUCT_UTSNAME])
-  SYS_UTSNAME_H='';       AC_SUBST([SYS_UTSNAME_H])
 ])