X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fsys_utsname_h.m4;h=bf87c0b8bf8e2dc37e88709352fa39009c2fd3f4;hb=effe7821374f8b7e22e9de3df9cc4e5f285712bd;hp=84b781f85ec96e66ac4875e63daddb7270562f1d;hpb=f2f428037cd5dcf93c4cc8cfacf4dd92f0f250bd;p=gnulib.git

diff --git a/m4/sys_utsname_h.m4 b/m4/sys_utsname_h.m4
index 84b781f85..bf87c0b8b 100644
--- 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 8
+dnl Copyright (C) 2009-2011 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.
@@ -12,26 +12,37 @@ AC_DEFUN([gl_SYS_UTSNAME_H],
   dnl once only, before all statements that occur in other macros.
   AC_REQUIRE([gl_SYS_UTSNAME_H_DEFAULTS])
 
+  dnl <sys/utsname.h> is always overridden, because of GNULIB_POSIXCHECK.
   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
     HAVE_SYS_UTSNAME_H=1
     AC_CHECK_TYPES([struct utsname], [], [HAVE_STRUCT_UTSNAME=0], [[
+/* Minix 3.1.8 has a bug: <stddef.h> must be included before
+   <sys/utsname.h>.  */
+#include <stddef.h>
 #include <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([[
+    /* Minix 3.1.8 has a bug: <stddef.h> must be included before
+       <sys/utsname.h>.  */
+    #include <stddef.h>
+    #include <sys/utsname.h>
+    ]], [uname])
 ])
 
 AC_DEFUN([gl_SYS_UTSNAME_MODULE_INDICATOR],
 [
   dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
   AC_REQUIRE([gl_SYS_UTSNAME_H_DEFAULTS])
-  GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
 ])
 
 AC_DEFUN([gl_SYS_UTSNAME_H_DEFAULTS],
@@ -40,5 +51,4 @@ 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])
 ])