1 files changed, 54 insertions, 0 deletions
diff --git a/m4/sys_utsname_h.m4 b/m4/sys_utsname_h.m4
new file mode 100644
index 0000000..cc7c8a9
--- /dev/null
+++ b/m4/sys_utsname_h.m4
@@ -0,0 +1,54 @@
+# sys_utsname_h.m4 serial 8
+dnl Copyright (C) 2009-2018 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 Written by Bruno Haible.
+
+AC_DEFUN([gl_SYS_UTSNAME_H],
+[
+  dnl Use AC_REQUIRE here, so that the default behavior below is expanded
+  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])
+  if test $ac_cv_header_sys_utsname_h != yes; then
+    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])
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+])
+
+AC_DEFUN([gl_SYS_UTSNAME_H_DEFAULTS],
+[
+  GNULIB_UNAME=0;         AC_SUBST([GNULIB_UNAME])
+  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])
+])