| 1 | # serial 20
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| 2 |
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| 3 | dnl From Jim Meyering.
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| 4 | dnl
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| 5 | dnl Check whether struct dirent has a member named d_ino.
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| 6 | dnl
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| 7 |
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| 8 | # Copyright (C) 1997, 1999-2001, 2003-2004, 2006-2007, 2009-2021 Free Software
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| 9 | # Foundation, Inc.
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| 10 |
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| 11 | # This file is free software; the Free Software Foundation
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| 12 | # gives unlimited permission to copy and/or distribute it,
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| 13 | # with or without modifications, as long as this notice is preserved.
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| 14 |
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| 15 | AC_DEFUN([gl_CHECK_TYPE_STRUCT_DIRENT_D_INO],
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| 16 | [AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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| 17 | AC_CACHE_CHECK([for d_ino member in directory struct],
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| 18 | [gl_cv_struct_dirent_d_ino],
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| 19 | [AC_RUN_IFELSE(
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| 20 | [AC_LANG_PROGRAM(
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| 21 | [[#include <sys/types.h>
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| 22 | #include <sys/stat.h>
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| 23 | #include <dirent.h>
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| 24 | ]],
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| 25 | [[DIR *dp = opendir (".");
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| 26 | struct dirent *e;
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| 27 | struct stat st;
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| 28 | if (! dp)
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| 29 | return 1;
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| 30 | e = readdir (dp);
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| 31 | if (! e)
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| 32 | { closedir (dp); return 2; }
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| 33 | if (lstat (e->d_name, &st) != 0)
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| 34 | { closedir (dp); return 3; }
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| 35 | if (e->d_ino != st.st_ino)
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| 36 | { closedir (dp); return 4; }
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| 37 | closedir (dp);
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| 38 | return 0;
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| 39 | ]])],
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| 40 | [gl_cv_struct_dirent_d_ino=yes],
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| 41 | [gl_cv_struct_dirent_d_ino=no],
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| 42 | [case "$host_os" in
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| 43 | # Guess yes on glibc systems with Linux kernel.
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| 44 | linux*-gnu*) gl_cv_struct_dirent_d_ino="guessing yes" ;;
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| 45 | # Guess yes on musl systems with Linux kernel.
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| 46 | linux*-musl*) gl_cv_struct_dirent_d_ino="guessing yes" ;;
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| 47 | # Guess no on native Windows.
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| 48 | mingw*) gl_cv_struct_dirent_d_ino="guessing no" ;;
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| 49 | # If we don't know, obey --enable-cross-guesses.
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| 50 | *) gl_cv_struct_dirent_d_ino="$gl_cross_guess_normal" ;;
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| 51 | esac
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| 52 | ])])
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| 53 | case "$gl_cv_struct_dirent_d_ino" in
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| 54 | *yes)
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| 55 | AC_DEFINE([D_INO_IN_DIRENT], [1],
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| 56 | [Define if struct dirent has a member d_ino that actually works.])
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| 57 | ;;
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| 58 | esac
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| 59 | ]
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| 60 | )
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