| 1 | # dirent_h.m4 serial 19
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| 2 | dnl Copyright (C) 2008-2022 Free Software Foundation, Inc.
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| 3 | dnl This file is free software; the Free Software Foundation
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| 4 | dnl gives unlimited permission to copy and/or distribute it,
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| 5 | dnl with or without modifications, as long as this notice is preserved.
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| 6 |
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| 7 | dnl Written by Bruno Haible.
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| 8 |
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| 9 | AC_DEFUN_ONCE([gl_DIRENT_H],
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| 10 | [
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| 11 | dnl Ensure to expand the default settings once only, before all statements
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| 12 | dnl that occur in other macros.
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| 13 | AC_REQUIRE([gl_DIRENT_H_DEFAULTS])
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| 14 |
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| 15 | dnl <dirent.h> is always overridden, because of GNULIB_POSIXCHECK.
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| 16 | gl_CHECK_NEXT_HEADERS([dirent.h])
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| 17 | if test $ac_cv_header_dirent_h = yes; then
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| 18 | HAVE_DIRENT_H=1
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| 19 | else
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| 20 | HAVE_DIRENT_H=0
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| 21 | fi
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| 22 | AC_SUBST([HAVE_DIRENT_H])
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| 23 |
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| 24 | dnl Check for declarations of anything we want to poison if the
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| 25 | dnl corresponding gnulib module is not in use.
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| 26 | gl_WARN_ON_USE_PREPARE([[#include <dirent.h>
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| 27 | ]], [alphasort closedir dirfd fdopendir opendir readdir rewinddir scandir])
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| 28 | ])
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| 29 |
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| 30 | # gl_DIRENT_MODULE_INDICATOR([modulename])
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| 31 | # sets the shell variable that indicates the presence of the given module
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| 32 | # to a C preprocessor expression that will evaluate to 1.
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| 33 | # This macro invocation must not occur in macros that are AC_REQUIREd.
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| 34 | AC_DEFUN([gl_DIRENT_MODULE_INDICATOR],
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| 35 | [
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| 36 | dnl Ensure to expand the default settings once only.
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| 37 | gl_DIRENT_H_REQUIRE_DEFAULTS
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| 38 | gl_MODULE_INDICATOR_SET_VARIABLE([$1])
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| 39 | dnl Define it also as a C macro, for the benefit of the unit tests.
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| 40 | gl_MODULE_INDICATOR_FOR_TESTS([$1])
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| 41 | ])
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| 42 |
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| 43 | # Initializes the default values for AC_SUBSTed shell variables.
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| 44 | # This macro must not be AC_REQUIREd. It must only be invoked, and only
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| 45 | # outside of macros or in macros that are not AC_REQUIREd.
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| 46 | AC_DEFUN([gl_DIRENT_H_REQUIRE_DEFAULTS],
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| 47 | [
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| 48 | m4_defun(GL_MODULE_INDICATOR_PREFIX[_DIRENT_H_MODULE_INDICATOR_DEFAULTS], [
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| 49 | gl_UNISTD_H_REQUIRE_DEFAULTS dnl for REPLACE_FCHDIR
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| 50 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_OPENDIR])
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| 51 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_READDIR])
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| 52 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_REWINDDIR])
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| 53 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_CLOSEDIR])
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| 54 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_DIRFD])
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| 55 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FDOPENDIR])
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| 56 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SCANDIR])
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| 57 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ALPHASORT])
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| 58 | ])
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| 59 | m4_require(GL_MODULE_INDICATOR_PREFIX[_DIRENT_H_MODULE_INDICATOR_DEFAULTS])
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| 60 | AC_REQUIRE([gl_DIRENT_H_DEFAULTS])
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| 61 | ])
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| 62 |
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| 63 | AC_DEFUN([gl_DIRENT_H_DEFAULTS],
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| 64 | [
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| 65 | dnl Assume proper GNU behavior unless another module says otherwise.
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| 66 | HAVE_OPENDIR=1; AC_SUBST([HAVE_OPENDIR])
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| 67 | HAVE_READDIR=1; AC_SUBST([HAVE_READDIR])
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| 68 | HAVE_REWINDDIR=1; AC_SUBST([HAVE_REWINDDIR])
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| 69 | HAVE_CLOSEDIR=1; AC_SUBST([HAVE_CLOSEDIR])
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| 70 | HAVE_DECL_DIRFD=1; AC_SUBST([HAVE_DECL_DIRFD])
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| 71 | HAVE_DECL_FDOPENDIR=1;AC_SUBST([HAVE_DECL_FDOPENDIR])
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| 72 | HAVE_FDOPENDIR=1; AC_SUBST([HAVE_FDOPENDIR])
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| 73 | HAVE_SCANDIR=1; AC_SUBST([HAVE_SCANDIR])
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| 74 | HAVE_ALPHASORT=1; AC_SUBST([HAVE_ALPHASORT])
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| 75 | REPLACE_OPENDIR=0; AC_SUBST([REPLACE_OPENDIR])
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| 76 | REPLACE_CLOSEDIR=0; AC_SUBST([REPLACE_CLOSEDIR])
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| 77 | REPLACE_DIRFD=0; AC_SUBST([REPLACE_DIRFD])
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| 78 | REPLACE_FDOPENDIR=0; AC_SUBST([REPLACE_FDOPENDIR])
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| 79 | ])
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