-# sys_utsname_h.m4 serial 1
-dnl Copyright (C) 2009 Free Software Foundation, Inc.
+# sys_utsname_h.m4 serial 8
+dnl Copyright (C) 2009-2014 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.
dnl once only, before all statements that occur in other macros.
AC_REQUIRE([gl_SYS_UTSNAME_H_DEFAULTS])
- AC_CHECK_HEADERS_ONCE([sys/utsname.h])
+ dnl <sys/utsname.h> is always overridden, because of GNULIB_POSIXCHECK.
+ gl_CHECK_NEXT_HEADERS([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],
[
- GNULIB_UNAME=0; AC_SUBST([GNULIB_UNAME])
+ GNULIB_UNAME=0; AC_SUBST([GNULIB_UNAME])
dnl Assume proper GNU behavior unless another module says otherwise.
- HAVE_UNAME=1; AC_SUBST([HAVE_UNAME])
- SYS_UTSNAME_H=''; AC_SUBST([SYS_UTSNAME_H])
+ HAVE_UNAME=1; AC_SUBST([HAVE_UNAME])
+ HAVE_STRUCT_UTSNAME=1; AC_SUBST([HAVE_STRUCT_UTSNAME])
])