1 # dirent_h.m4 serial 19
2 dnl Copyright (C) 2008-2022 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 dnl Written by Bruno Haible.
9 AC_DEFUN_ONCE([gl_DIRENT_H],
11 dnl Ensure to expand the default settings once only, before all statements
12 dnl that occur in other macros.
13 AC_REQUIRE([gl_DIRENT_H_DEFAULTS])
15 dnl <dirent.h> is always overridden, because of GNULIB_POSIXCHECK.
16 gl_CHECK_NEXT_HEADERS([dirent.h])
17 if test $ac_cv_header_dirent_h = yes; then
22 AC_SUBST([HAVE_DIRENT_H])
24 dnl Check for declarations of anything we want to poison if the
25 dnl corresponding gnulib module is not in use.
26 gl_WARN_ON_USE_PREPARE([[#include <dirent.h>
27 ]], [alphasort closedir dirfd fdopendir opendir readdir rewinddir scandir])
30 # gl_DIRENT_MODULE_INDICATOR([modulename])
31 # sets the shell variable that indicates the presence of the given module
32 # to a C preprocessor expression that will evaluate to 1.
33 # This macro invocation must not occur in macros that are AC_REQUIREd.
34 AC_DEFUN([gl_DIRENT_MODULE_INDICATOR],
36 dnl Ensure to expand the default settings once only.
37 gl_DIRENT_H_REQUIRE_DEFAULTS
38 gl_MODULE_INDICATOR_SET_VARIABLE([$1])
39 dnl Define it also as a C macro, for the benefit of the unit tests.
40 gl_MODULE_INDICATOR_FOR_TESTS([$1])
43 # Initializes the default values for AC_SUBSTed shell variables.
44 # This macro must not be AC_REQUIREd. It must only be invoked, and only
45 # outside of macros or in macros that are not AC_REQUIREd.
46 AC_DEFUN([gl_DIRENT_H_REQUIRE_DEFAULTS],
48 m4_defun(GL_MODULE_INDICATOR_PREFIX[_DIRENT_H_MODULE_INDICATOR_DEFAULTS], [
49 gl_UNISTD_H_REQUIRE_DEFAULTS dnl for REPLACE_FCHDIR
50 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_OPENDIR])
51 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_READDIR])
52 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_REWINDDIR])
53 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_CLOSEDIR])
54 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_DIRFD])
55 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FDOPENDIR])
56 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SCANDIR])
57 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ALPHASORT])
59 m4_require(GL_MODULE_INDICATOR_PREFIX[_DIRENT_H_MODULE_INDICATOR_DEFAULTS])
60 AC_REQUIRE([gl_DIRENT_H_DEFAULTS])
63 AC_DEFUN([gl_DIRENT_H_DEFAULTS],
65 dnl Assume proper GNU behavior unless another module says otherwise.
66 HAVE_OPENDIR=1; AC_SUBST([HAVE_OPENDIR])
67 HAVE_READDIR=1; AC_SUBST([HAVE_READDIR])
68 HAVE_REWINDDIR=1; AC_SUBST([HAVE_REWINDDIR])
69 HAVE_CLOSEDIR=1; AC_SUBST([HAVE_CLOSEDIR])
70 HAVE_DECL_DIRFD=1; AC_SUBST([HAVE_DECL_DIRFD])
71 HAVE_DECL_FDOPENDIR=1;AC_SUBST([HAVE_DECL_FDOPENDIR])
72 HAVE_FDOPENDIR=1; AC_SUBST([HAVE_FDOPENDIR])
73 HAVE_SCANDIR=1; AC_SUBST([HAVE_SCANDIR])
74 HAVE_ALPHASORT=1; AC_SUBST([HAVE_ALPHASORT])
75 REPLACE_OPENDIR=0; AC_SUBST([REPLACE_OPENDIR])
76 REPLACE_CLOSEDIR=0; AC_SUBST([REPLACE_CLOSEDIR])
77 REPLACE_DIRFD=0; AC_SUBST([REPLACE_DIRFD])
78 REPLACE_FDOPENDIR=0; AC_SUBST([REPLACE_FDOPENDIR])