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-rw-r--r--m4/d-ino.m460
1 files changed, 60 insertions, 0 deletions
diff --git a/m4/d-ino.m4 b/m4/d-ino.m4
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+++ b/m4/d-ino.m4
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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, 2009-2022 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
+ ]
+)