1# sys_utsname_h.m4 serial 8
2dnl Copyright (C) 2009-2015 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
7dnl Written by Bruno Haible.
8
9AC_DEFUN([gl_SYS_UTSNAME_H],
10[
11  dnl Use AC_REQUIRE here, so that the default behavior below is expanded
12  dnl once only, before all statements that occur in other macros.
13  AC_REQUIRE([gl_SYS_UTSNAME_H_DEFAULTS])
14
15  dnl <sys/utsname.h> is always overridden, because of GNULIB_POSIXCHECK.
16  gl_CHECK_NEXT_HEADERS([sys/utsname.h])
17  if test $ac_cv_header_sys_utsname_h != yes; then
18    HAVE_SYS_UTSNAME_H=0
19    HAVE_STRUCT_UTSNAME=0
20  else
21    HAVE_SYS_UTSNAME_H=1
22    AC_CHECK_TYPES([struct utsname], [], [HAVE_STRUCT_UTSNAME=0], [[
23/* Minix 3.1.8 has a bug: <stddef.h> must be included before
24   <sys/utsname.h>.  */
25#include <stddef.h>
26#include <sys/utsname.h>
27      ]])
28  fi
29  AC_SUBST([HAVE_SYS_UTSNAME_H])
30
31  dnl Check for declarations of anything we want to poison if the
32  dnl corresponding gnulib module is not in use.
33  gl_WARN_ON_USE_PREPARE([[
34    /* Minix 3.1.8 has a bug: <stddef.h> must be included before
35       <sys/utsname.h>.  */
36    #include <stddef.h>
37    #include <sys/utsname.h>
38    ]], [uname])
39])
40
41AC_DEFUN([gl_SYS_UTSNAME_MODULE_INDICATOR],
42[
43  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
44  AC_REQUIRE([gl_SYS_UTSNAME_H_DEFAULTS])
45  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
46])
47
48AC_DEFUN([gl_SYS_UTSNAME_H_DEFAULTS],
49[
50  GNULIB_UNAME=0;         AC_SUBST([GNULIB_UNAME])
51  dnl Assume proper GNU behavior unless another module says otherwise.
52  HAVE_UNAME=1;           AC_SUBST([HAVE_UNAME])
53  HAVE_STRUCT_UTSNAME=1;  AC_SUBST([HAVE_STRUCT_UTSNAME])
54])
55