3 dnl Copyright (C) 1997, 1999-2001, 2003-2004, 2006-2007, 2009-2024 Free Software Foundation, Inc.
4 dnl This file is free software; the Free Software Foundation
5 dnl gives unlimited permission to copy and/or distribute it,
6 dnl with or without modifications, as long as this notice is preserved.
7 dnl This file is offered as-is, without any warranty.
11 dnl Check whether struct dirent has a member named d_ino.
13 AC_DEFUN([gl_CHECK_TYPE_STRUCT_DIRENT_D_INO],
14 [AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
15 AC_CACHE_CHECK([for d_ino member in directory struct],
16 [gl_cv_struct_dirent_d_ino],
19 [[#include <sys/types.h>
23 [[DIR *dp = opendir (".");
30 { closedir (dp); return 2; }
31 if (lstat (e->d_name, &st) != 0)
32 { closedir (dp); return 3; }
33 if (e->d_ino != st.st_ino)
34 { closedir (dp); return 4; }
38 [gl_cv_struct_dirent_d_ino=yes],
39 [gl_cv_struct_dirent_d_ino=no],
41 # Guess yes on glibc systems with Linux kernel.
42 linux*-gnu*) gl_cv_struct_dirent_d_ino="guessing yes" ;;
43 # Guess yes on musl systems with Linux kernel.
44 linux*-musl*) gl_cv_struct_dirent_d_ino="guessing yes" ;;
45 # Guess yes on systems that emulate the Linux system calls.
46 midipix*) gl_cv_struct_dirent_d_ino="guessing yes" ;;
47 # Guess no on native Windows.
48 mingw* | windows*) gl_cv_struct_dirent_d_ino="guessing no" ;;
49 # If we don't know, obey --enable-cross-guesses.
50 *) gl_cv_struct_dirent_d_ino="$gl_cross_guess_normal" ;;
53 case "$gl_cv_struct_dirent_d_ino" in
55 AC_DEFINE([D_INO_IN_DIRENT], [1],
56 [Define if struct dirent has a member d_ino that actually works.])