+# 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.
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>
if (symlink (".", sym) != 0
|| close (open (sym, O_RDONLY | O_NOFOLLOW)) == 0)
status |= 32;
+ unlink (sym);
}
{
static char const file[] = "confdefs.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])
])