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# dirent_h.m4 serial 21
dnl Copyright (C) 2008-2023 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
dnl Written by Bruno Haible.
AC_DEFUN_ONCE([gl_DIRENT_H],
[
dnl Ensure to expand the default settings once only, before all statements
dnl that occur in other macros.
AC_REQUIRE([gl_DIRENT_H_DEFAULTS])
dnl <dirent.h> is always overridden, because of GNULIB_POSIXCHECK.
gl_CHECK_NEXT_HEADERS([dirent.h])
if test $ac_cv_header_dirent_h = yes; then
HAVE_DIRENT_H=1
else
HAVE_DIRENT_H=0
fi
AC_SUBST([HAVE_DIRENT_H])
gl_DIRENT_DIR
dnl Check for declarations of anything we want to poison if the
dnl corresponding gnulib module is not in use.
gl_WARN_ON_USE_PREPARE([[#include <dirent.h>
]], [alphasort closedir dirfd fdopendir opendir readdir rewinddir scandir])
])
dnl Determine whether <dirent.h> needs to override the DIR type.
AC_DEFUN_ONCE([gl_DIRENT_DIR],
[
dnl Set DIR_HAS_FD_MEMBER if dirfd() works, i.e. not always returns -1,
dnl or has the __KLIBC__ workaround as in lib/dirfd.c.
dnl We could use the findings from gl_FUNC_DIRFD and gl_PREREQ_DIRFD, but
dnl it's simpler since we know the affected platforms.
AC_REQUIRE([AC_CANONICAL_HOST])
case "$host_os" in
mingw* | windows*) DIR_HAS_FD_MEMBER=0 ;;
*) DIR_HAS_FD_MEMBER=1 ;;
esac
AC_SUBST([DIR_HAS_FD_MEMBER])
])
# gl_DIRENT_MODULE_INDICATOR([modulename])
# sets the shell variable that indicates the presence of the given module
# to a C preprocessor expression that will evaluate to 1.
# This macro invocation must not occur in macros that are AC_REQUIREd.
AC_DEFUN([gl_DIRENT_MODULE_INDICATOR],
[
dnl Ensure to expand the default settings once only.
gl_DIRENT_H_REQUIRE_DEFAULTS
gl_MODULE_INDICATOR_SET_VARIABLE([$1])
dnl Define it also as a C macro, for the benefit of the unit tests.
gl_MODULE_INDICATOR_FOR_TESTS([$1])
])
# Initializes the default values for AC_SUBSTed shell variables.
# This macro must not be AC_REQUIREd. It must only be invoked, and only
# outside of macros or in macros that are not AC_REQUIREd.
AC_DEFUN([gl_DIRENT_H_REQUIRE_DEFAULTS],
[
m4_defun(GL_MODULE_INDICATOR_PREFIX[_DIRENT_H_MODULE_INDICATOR_DEFAULTS], [
gl_UNISTD_H_REQUIRE_DEFAULTS dnl for REPLACE_FCHDIR
gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_OPENDIR])
gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_READDIR])
gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_REWINDDIR])
gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_CLOSEDIR])
gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_DIRFD])
gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FDOPENDIR])
gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SCANDIR])
gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ALPHASORT])
])
m4_require(GL_MODULE_INDICATOR_PREFIX[_DIRENT_H_MODULE_INDICATOR_DEFAULTS])
AC_REQUIRE([gl_DIRENT_H_DEFAULTS])
])
AC_DEFUN([gl_DIRENT_H_DEFAULTS],
[
dnl Assume proper GNU behavior unless another module says otherwise.
HAVE_OPENDIR=1; AC_SUBST([HAVE_OPENDIR])
HAVE_READDIR=1; AC_SUBST([HAVE_READDIR])
HAVE_REWINDDIR=1; AC_SUBST([HAVE_REWINDDIR])
HAVE_CLOSEDIR=1; AC_SUBST([HAVE_CLOSEDIR])
HAVE_DECL_DIRFD=1; AC_SUBST([HAVE_DECL_DIRFD])
HAVE_DECL_FDOPENDIR=1;AC_SUBST([HAVE_DECL_FDOPENDIR])
HAVE_FDOPENDIR=1; AC_SUBST([HAVE_FDOPENDIR])
HAVE_SCANDIR=1; AC_SUBST([HAVE_SCANDIR])
HAVE_ALPHASORT=1; AC_SUBST([HAVE_ALPHASORT])
REPLACE_OPENDIR=0; AC_SUBST([REPLACE_OPENDIR])
REPLACE_READDIR=0; AC_SUBST([REPLACE_READDIR])
REPLACE_REWINDDIR=0; AC_SUBST([REPLACE_REWINDDIR])
REPLACE_CLOSEDIR=0; AC_SUBST([REPLACE_CLOSEDIR])
REPLACE_DIRFD=0; AC_SUBST([REPLACE_DIRFD])
REPLACE_FDOPENDIR=0; AC_SUBST([REPLACE_FDOPENDIR])
])
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