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- # serial 20
- dnl From Jim Meyering.
- dnl
- dnl Check whether struct dirent has a member named d_ino.
- dnl
- # Copyright (C) 1997, 1999-2001, 2003-2004, 2006-2007, 2009-2021 Free Software
- # Foundation, Inc.
- # This file is free software; the Free Software Foundation
- # gives unlimited permission to copy and/or distribute it,
- # with or without modifications, as long as this notice is preserved.
- AC_DEFUN([gl_CHECK_TYPE_STRUCT_DIRENT_D_INO],
- [AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
- AC_CACHE_CHECK([for d_ino member in directory struct],
- [gl_cv_struct_dirent_d_ino],
- [AC_RUN_IFELSE(
- [AC_LANG_PROGRAM(
- [[#include <sys/types.h>
- #include <sys/stat.h>
- #include <dirent.h>
- ]],
- [[DIR *dp = opendir (".");
- struct dirent *e;
- struct stat st;
- if (! dp)
- return 1;
- e = readdir (dp);
- if (! e)
- { closedir (dp); return 2; }
- if (lstat (e->d_name, &st) != 0)
- { closedir (dp); return 3; }
- if (e->d_ino != st.st_ino)
- { closedir (dp); return 4; }
- closedir (dp);
- return 0;
- ]])],
- [gl_cv_struct_dirent_d_ino=yes],
- [gl_cv_struct_dirent_d_ino=no],
- [case "$host_os" in
- # Guess yes on glibc systems with Linux kernel.
- linux*-gnu*) gl_cv_struct_dirent_d_ino="guessing yes" ;;
- # Guess yes on musl systems with Linux kernel.
- linux*-musl*) gl_cv_struct_dirent_d_ino="guessing yes" ;;
- # Guess no on native Windows.
- mingw*) gl_cv_struct_dirent_d_ino="guessing no" ;;
- # If we don't know, obey --enable-cross-guesses.
- *) gl_cv_struct_dirent_d_ino="$gl_cross_guess_normal" ;;
- esac
- ])])
- case "$gl_cv_struct_dirent_d_ino" in
- *yes)
- AC_DEFINE([D_INO_IN_DIRENT], [1],
- [Define if struct dirent has a member d_ino that actually works.])
- ;;
- esac
- ]
- )
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