1 files changed, 0 insertions, 84 deletions
diff --git a/extension/m4/dirfd.m4 b/extension/m4/dirfd.m4
deleted file mode 100644
index 0b09a390..00000000
--- a/extension/m4/dirfd.m4
+++ /dev/null
@@ -1,84 +0,0 @@
-# serial 22   -*- Autoconf -*-
-
-dnl Find out how to get the file descriptor associated with an open DIR*.
-
-# Copyright (C) 2001-2006, 2008-2013 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.
-
-dnl From Jim Meyering
-dnl Simplified for gawk
-
-AC_DEFUN([GAWK_FUNC_DIRFD],
-[
-dnl  AC_REQUIRE([gl_DIRENT_H_DEFAULTS])
-
-  dnl Persuade glibc <dirent.h> to declare dirfd().
-  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
-
-  AC_CHECK_FUNCS([dirfd])
-  AC_CHECK_DECLS([dirfd], , ,
-    [[#include <sys/types.h>
-      #include <dirent.h>]])
-  if test $ac_cv_have_decl_dirfd = no; then
-    HAVE_DECL_DIRFD=0
-  fi
-
-  AC_CACHE_CHECK([whether dirfd is a macro],
-    gl_cv_func_dirfd_macro,
-    [AC_EGREP_CPP([dirent_header_defines_dirfd], [
-#include <sys/types.h>
-#include <dirent.h>
-#ifdef dirfd
- dirent_header_defines_dirfd
-#endif],
-       gl_cv_func_dirfd_macro=yes,
-       gl_cv_func_dirfd_macro=no)])
-
-  # Use the replacement only if we have no function or macro with that name.
-  if test $ac_cv_func_dirfd = no && test $gl_cv_func_dirfd_macro = no; then
-    if test $ac_cv_have_decl_dirfd = yes; then
-      # If the system declares dirfd already, let's declare rpl_dirfd instead.
-      REPLACE_DIRFD=1
-    fi
-  fi
-])
-
-dnl Prerequisites of lib/dirfd.c.
-AC_DEFUN([GAWK_PREREQ_DIRFD],
-[
-  AC_CACHE_CHECK([how to get the file descriptor associated with an open DIR*],
-                 [gl_cv_sys_dir_fd_member_name],
-    [
-      dirfd_save_CFLAGS=$CFLAGS
-      for ac_expr in d_fd dd_fd; do
-
-        CFLAGS="$CFLAGS -DDIR_FD_MEMBER_NAME=$ac_expr"
-        AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
-           #include <sys/types.h>
-           #include <dirent.h>]],
-          [[DIR *dir_p = opendir("."); (void) dir_p->DIR_FD_MEMBER_NAME;]])],
-          [dir_fd_found=yes]
-        )
-        CFLAGS=$dirfd_save_CFLAGS
-        test "$dir_fd_found" = yes && break
-      done
-      test "$dir_fd_found" = yes || ac_expr=no_such_member
-
-      gl_cv_sys_dir_fd_member_name=$ac_expr
-    ]
-  )
-  if test $gl_cv_sys_dir_fd_member_name != no_such_member; then
-    AC_DEFINE_UNQUOTED([DIR_FD_MEMBER_NAME],
-      [$gl_cv_sys_dir_fd_member_name],
-      [the name of the file descriptor member of DIR])
-  fi
-  AH_VERBATIM([DIR_TO_FD],
-              [#ifdef DIR_FD_MEMBER_NAME
-# define DIR_TO_FD(Dir_p) ((Dir_p)->DIR_FD_MEMBER_NAME)
-#else
-# define DIR_TO_FD(Dir_p) -1
-#endif
-])
-])