annotate m4/dirent_h.m4 @ 13066:fc8c984b0733

Factorize common .m4 code.
author Bruno Haible <bruno@clisp.org>
date Sat, 27 Mar 2010 18:38:53 +0100
parents b1a410092484
children b2385e7b332e
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fc8c984b0733 Factorize common .m4 code.
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1 # dirent_h.m4 serial 11
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2 dnl Copyright (C) 2008-2010 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([gl_DIRENT_H],
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10 [
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11 dnl Use AC_REQUIRE here, so that the default behavior below is expanded
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12 dnl once only, before all statements 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
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18 dnl Check for declarations of anything we want to poison if the
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19 dnl corresponding gnulib module is not in use.
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20 gl_WARN_ON_USE_PREPARE([[#include <dirent.h>
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21 ]], [alphasort dirfd fdopendir scandir])
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22 ])
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23
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24 dnl Unconditionally enables the replacement of <dirent.h>.
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25 AC_DEFUN([gl_REPLACE_DIRENT_H],
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26 [
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27 dnl This is a no-op, because <dirent.h> is always overridden.
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28 :
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29 ])
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30
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31 AC_DEFUN([gl_DIRENT_MODULE_INDICATOR],
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32 [
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33 dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
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34 AC_REQUIRE([gl_DIRENT_H_DEFAULTS])
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35 gl_MODULE_INDICATOR_SET_VARIABLE([$1])
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36 dnl Define it also as a C macro, for the benefit of the unit tests.
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37 gl_MODULE_INDICATOR([$1])
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38 ])
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39
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40 AC_DEFUN([gl_DIRENT_H_DEFAULTS],
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41 [
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42 AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) dnl for REPLACE_FCHDIR
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43 GNULIB_DIRFD=0; AC_SUBST([GNULIB_DIRFD])
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44 GNULIB_FDOPENDIR=0; AC_SUBST([GNULIB_FDOPENDIR])
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45 GNULIB_SCANDIR=0; AC_SUBST([GNULIB_SCANDIR])
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46 GNULIB_ALPHASORT=0; AC_SUBST([GNULIB_ALPHASORT])
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47 dnl Assume proper GNU behavior unless another module says otherwise.
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48 HAVE_DECL_DIRFD=1; AC_SUBST([HAVE_DECL_DIRFD])
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49 HAVE_FDOPENDIR=1; AC_SUBST([HAVE_FDOPENDIR])
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50 HAVE_SCANDIR=1; AC_SUBST([HAVE_SCANDIR])
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51 HAVE_ALPHASORT=1; AC_SUBST([HAVE_ALPHASORT])
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52 REPLACE_CLOSEDIR=0; AC_SUBST([REPLACE_CLOSEDIR])
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53 REPLACE_FDOPENDIR=0; AC_SUBST([REPLACE_FDOPENDIR])
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54 REPLACE_OPENDIR=0; AC_SUBST([REPLACE_OPENDIR])
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55 ])