Imported Upstream version 1.3.14

[debian/gzip] / m4 / fcntl_h.m4

diff --git a/m4/fcntl_h.m4 b/m4/fcntl_h.m4
index 9846b2f313b3818af1a9bbdaf52358a8d7fc095f..223fa4830a428311c3aefda9004e903503182bf8 100644 (file)
--- a/m4/fcntl_h.m4
+++ b/m4/fcntl_h.m4
@@ -1,5 +1,6 @@
+# serial 6
 # Configure fcntl.h.
-dnl Copyright (C) 2006 Free Software Foundation, Inc.
+dnl Copyright (C) 2006, 2007, 2009 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.
@@ -8,7 +9,21 @@ dnl Written by Paul Eggert.
 
 AC_DEFUN([gl_FCNTL_H],
 [
-  AC_CACHE_CHECK([for working fcntl.h], gl_cv_header_working_fcntl_h,
+  AC_REQUIRE([gl_FCNTL_H_DEFAULTS])
+  AC_REQUIRE([gl_FCNTL_O_FLAGS])
+  gl_CHECK_NEXT_HEADERS([fcntl.h])
+  FCNTL_H='fcntl.h'
+  AC_SUBST([FCNTL_H])
+])
+
+# Test whether the flags O_NOATIME and O_NOFOLLOW actually work.
+# Define HAVE_WORKING_O_NOATIME to 1 if O_NOATIME works, or to 0 otherwise.
+# Define HAVE_WORKING_O_NOFOLLOW to 1 if O_NOFOLLOW works, or to 0 otherwise.
+AC_DEFUN([gl_FCNTL_O_FLAGS],
+[
+  dnl Persuade glibc <fcntl.h> to define O_NOATIME and O_NOFOLLOW.
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+  AC_CACHE_CHECK([for working fcntl.h], [gl_cv_header_working_fcntl_h],
     [AC_RUN_IFELSE(
        [AC_LANG_PROGRAM(
          [[#include <sys/types.h>
@@ -34,6 +49,7 @@ AC_DEFUN([gl_FCNTL_H],
              if (symlink (".", sym) != 0
                  || close (open (sym, O_RDONLY | O_NOFOLLOW)) == 0)
                status |= 32;
+             unlink (sym);
            }
            {
              static char const file[] = "confdefs.h";
@@ -72,10 +88,21 @@ AC_DEFUN([gl_FCNTL_H],
   esac
   AC_DEFINE_UNQUOTED([HAVE_WORKING_O_NOFOLLOW], [$ac_val],
     [Define to 1 if O_NOFOLLOW works.])
+])
 
-  gl_ABSOLUTE_HEADER([fcntl.h])
-  ABSOLUTE_FCNTL_H=\"$gl_cv_absolute_fcntl_h\"
-  AC_SUBST([ABSOLUTE_FCNTL_H])
-  FCNTL_H='fcntl.h'
-  AC_SUBST([FCNTL_H])
+AC_DEFUN([gl_FCNTL_MODULE_INDICATOR],
+[
+  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
+  AC_REQUIRE([gl_FCNTL_H_DEFAULTS])
+  GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
+])
+
+AC_DEFUN([gl_FCNTL_H_DEFAULTS],
+[
+  GNULIB_OPEN=0;    AC_SUBST([GNULIB_OPEN])
+  GNULIB_OPENAT=0;  AC_SUBST([GNULIB_OPENAT])
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE_OPENAT=1;    AC_SUBST([HAVE_OPENAT])
+  REPLACE_OPEN=0;   AC_SUBST([REPLACE_OPEN])
+  REPLACE_OPENAT=0; AC_SUBST([REPLACE_OPENAT])
 ])