455 lines
15 KiB
Plaintext
455 lines
15 KiB
Plaintext
# This file is part of Autoconf. -*- Autoconf -*-
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# Checking for headers.
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# Copyright 2000, 2001
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# Free Software Foundation, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2, or (at your option)
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# any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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# 02111-1307, USA.
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#
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# As a special exception, the Free Software Foundation gives unlimited
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# permission to copy, distribute and modify the configure scripts that
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# are the output of Autoconf. You need not follow the terms of the GNU
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# General Public License when using or distributing such scripts, even
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# though portions of the text of Autoconf appear in them. The GNU
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# General Public License (GPL) does govern all other use of the material
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# that constitutes the Autoconf program.
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#
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# Certain portions of the Autoconf source text are designed to be copied
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# (in certain cases, depending on the input) into the output of
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# Autoconf. We call these the "data" portions. The rest of the Autoconf
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# source text consists of comments plus executable code that decides which
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# of the data portions to output in any given case. We call these
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# comments and executable code the "non-data" portions. Autoconf never
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# copies any of the non-data portions into its output.
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#
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# This special exception to the GPL applies to versions of Autoconf
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# released by the Free Software Foundation. When you make and
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# distribute a modified version of Autoconf, you may extend this special
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# exception to the GPL to apply to your modified version as well, *unless*
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# your modified version has the potential to copy into its output some
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# of the text that was the non-data portion of the version that you started
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# with. (In other words, unless your change moves or copies text from
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# the non-data portions to the data portions.) If your modification has
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# such potential, you must delete any notice of this special exception
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# to the GPL from your modified version.
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#
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# Written by David MacKenzie, with help from
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# Franc,ois Pinard, Karl Berry, Richard Pixley, Ian Lance Taylor,
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# Roland McGrath, Noah Friedman, david d zuhn, and many others.
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# Table of contents
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#
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# 1. Generic tests for headers
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# 2. Tests for specific headers
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## ------------------------------ ##
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## 1. Generic tests for headers. ##
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## ------------------------------ ##
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# AC_CHECK_HEADER(HEADER-FILE,
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# [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND],
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# [INCLUDES])
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# ---------------------------------------------------------
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# If INCLUDES is empty and strictly empty, use the preprocessor to
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# check whether HEADER-FILE exists. If INCLUDES is set, then use the
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# compiler to check whether INCLUDES followed by HEADER-FILE compiles
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# with success.
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AC_DEFUN([AC_CHECK_HEADER],
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[AS_VAR_PUSHDEF([ac_Header], [ac_cv_header_$1])dnl
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AC_CACHE_CHECK([for $1], ac_Header,
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[m4_ifval([$4],
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[AC_COMPILE_IFELSE([AC_LANG_SOURCE([$4
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@%:@include <$1>])],
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[AS_VAR_SET(ac_Header, yes)],
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[AS_VAR_SET(ac_Header, no)])],
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[AC_PREPROC_IFELSE([AC_LANG_SOURCE([@%:@include <$1>])],
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[AS_VAR_SET(ac_Header, yes)],
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[AS_VAR_SET(ac_Header, no)])])])
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AS_IF([test AS_VAR_GET(ac_Header) = yes], [$2], [$3])[]dnl
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AS_VAR_POPDEF([ac_Header])dnl
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])# AC_CHECK_HEADER
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# AH_CHECK_HEADERS(HEADER-FILE...)
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# --------------------------------
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m4_define([AH_CHECK_HEADERS],
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[AC_FOREACH([AC_Header], [$1],
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[AH_TEMPLATE(AS_TR_CPP(HAVE_[]AC_Header),
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[Define if you have the <]AC_Header[> header file.])])])
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# AC_CHECK_HEADERS(HEADER-FILE...
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# [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND],
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# [INCLUDES])
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# ----------------------------------------------------------
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AC_DEFUN([AC_CHECK_HEADERS],
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[AH_CHECK_HEADERS([$1])dnl
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for ac_header in $1
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do
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AC_CHECK_HEADER($ac_header,
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[AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_$ac_header)) $2],
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[$3],
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[$4])dnl
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done
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])# AC_CHECK_HEADERS
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## ------------------------------- ##
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## 2. Tests for specific headers. ##
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## ------------------------------- ##
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# _AC_CHECK_HEADER_DIRENT(HEADER-FILE,
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# [ACTION-IF-FOUND], [ACTION-IF-NOT_FOUND])
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# -----------------------------------------------------------------
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# Like AC_CHECK_HEADER, except also make sure that HEADER-FILE
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# defines the type `DIR'. dirent.h on NextStep 3.2 doesn't.
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m4_define([_AC_CHECK_HEADER_DIRENT],
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[AS_VAR_PUSHDEF([ac_Header], [ac_cv_header_dirent_$1])dnl
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AC_CACHE_CHECK([for $1 that defines DIR], ac_Header,
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[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <sys/types.h>
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#include <$1>
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],
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[if ((DIR *) 0)
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return 0;])],
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[AS_VAR_SET(ac_Header, yes)],
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[AS_VAR_SET(ac_Header, no)])])
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AS_IF([test AS_VAR_GET(ac_Header) = yes], [$2], [$3])[]dnl
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AS_VAR_POPDEF([ac_Header])dnl
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])# _AC_CHECK_HEADER_DIRENT
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# AH_CHECK_HEADERS_DIRENT(HEADERS...)
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# -----------------------------------
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m4_define([AH_CHECK_HEADERS_DIRENT],
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[AC_FOREACH([AC_Header], [$1],
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[AH_TEMPLATE(AS_TR_CPP(HAVE_[]AC_Header),
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[Define if you have the <]AC_Header[> header file, and
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it defines `DIR'.])])])
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# AC_HEADER_DIRENT
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# ----------------
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AC_DEFUN([AC_HEADER_DIRENT],
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[AH_CHECK_HEADERS_DIRENT(dirent.h sys/ndir.h sys/dir.h ndir.h)
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ac_header_dirent=no
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for ac_hdr in dirent.h sys/ndir.h sys/dir.h ndir.h; do
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_AC_CHECK_HEADER_DIRENT($ac_hdr,
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[AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_$ac_hdr), 1)
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ac_header_dirent=$ac_hdr; break])
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done
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# Two versions of opendir et al. are in -ldir and -lx on SCO Xenix.
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if test $ac_header_dirent = dirent.h; then
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AC_CHECK_LIB(dir, opendir, LIBS="$LIBS -ldir")
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else
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AC_CHECK_LIB(x, opendir, LIBS="$LIBS -lx")
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fi
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])# AC_HEADER_DIRENT
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# AC_HEADER_MAJOR
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# ---------------
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AC_DEFUN([AC_HEADER_MAJOR],
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[AC_CACHE_CHECK(whether sys/types.h defines makedev,
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ac_cv_header_sys_types_h_makedev,
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[AC_TRY_LINK([#include <sys/types.h>
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], [return makedev(0, 0);],
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ac_cv_header_sys_types_h_makedev=yes, ac_cv_header_sys_types_h_makedev=no)
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])
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if test $ac_cv_header_sys_types_h_makedev = no; then
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AC_CHECK_HEADER(sys/mkdev.h,
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[AC_DEFINE(MAJOR_IN_MKDEV, 1,
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[Define if `major', `minor', and `makedev' are
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declared in <mkdev.h>.])])
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if test $ac_cv_header_sys_mkdev_h = no; then
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AC_CHECK_HEADER(sys/sysmacros.h,
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[AC_DEFINE(MAJOR_IN_SYSMACROS, 1,
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[Define if `major', `minor', and `makedev' are
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declared in <sysmacros.h>.])])
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fi
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fi
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])# AC_HEADER_MAJOR
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# AC_HEADER_STAT
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# --------------
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# FIXME: Shouldn't this be named AC_HEADER_SYS_STAT?
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AC_DEFUN([AC_HEADER_STAT],
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[AC_CACHE_CHECK(whether stat file-mode macros are broken,
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ac_cv_header_stat_broken,
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[AC_EGREP_CPP([You lose], [#include <sys/types.h>
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#include <sys/stat.h>
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#if defined(S_ISBLK) && defined(S_IFDIR)
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# if S_ISBLK (S_IFDIR)
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You lose.
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# endif
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#endif
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#if defined(S_ISBLK) && defined(S_IFCHR)
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# if S_ISBLK (S_IFCHR)
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You lose.
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# endif
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#endif
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#if defined(S_ISLNK) && defined(S_IFREG)
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# if S_ISLNK (S_IFREG)
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You lose.
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# endif
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#endif
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#if defined(S_ISSOCK) && defined(S_IFREG)
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# if S_ISSOCK (S_IFREG)
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You lose.
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# endif
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#endif
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], ac_cv_header_stat_broken=yes, ac_cv_header_stat_broken=no)])
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if test $ac_cv_header_stat_broken = yes; then
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AC_DEFINE(STAT_MACROS_BROKEN, 1,
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[Define if the `S_IS*' macros in <sys/stat.h> do not
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work properly.])
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fi
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])# AC_HEADER_STAT
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# AC_HEADER_STDC
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# --------------
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AC_DEFUN([AC_HEADER_STDC],
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[AC_CACHE_CHECK(for ANSI C header files, ac_cv_header_stdc,
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[AC_TRY_CPP([#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include <float.h>
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], ac_cv_header_stdc=yes, ac_cv_header_stdc=no)
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if test $ac_cv_header_stdc = yes; then
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# SunOS 4.x string.h does not declare mem*, contrary to ANSI.
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AC_EGREP_HEADER(memchr, string.h, , ac_cv_header_stdc=no)
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fi
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if test $ac_cv_header_stdc = yes; then
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# ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
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AC_EGREP_HEADER(free, stdlib.h, , ac_cv_header_stdc=no)
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fi
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if test $ac_cv_header_stdc = yes; then
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# /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
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AC_TRY_RUN(
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[#include <ctype.h>
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#if ((' ' & 0x0FF) == 0x020)
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# define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
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# define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
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#else
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# define ISLOWER(c) (('a' <= (c) && (c) <= 'i') \
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|| ('j' <= (c) && (c) <= 'r') \
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|| ('s' <= (c) && (c) <= 'z'))
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# define TOUPPER(c) (ISLOWER(c) ? ((c) | 0x40) : (c))
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#endif
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#define XOR(e, f) (((e) && !(f)) || (!(e) && (f)))
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int
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main ()
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{
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int i;
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for (i = 0; i < 256; i++)
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if (XOR (islower (i), ISLOWER (i))
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|| toupper (i) != TOUPPER (i))
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exit(2);
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exit (0);
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}], , ac_cv_header_stdc=no, :)
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fi])
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if test $ac_cv_header_stdc = yes; then
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AC_DEFINE(STDC_HEADERS, 1, [Define if you have the ANSI C header files.])
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fi
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])# AC_HEADER_STDC
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# AC_HEADER_SYS_WAIT
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# ------------------
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AC_DEFUN([AC_HEADER_SYS_WAIT],
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[AC_CACHE_CHECK([for sys/wait.h that is POSIX.1 compatible],
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ac_cv_header_sys_wait_h,
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[AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM([#include <sys/types.h>
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#include <sys/wait.h>
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#ifndef WEXITSTATUS
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# define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
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#endif
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#ifndef WIFEXITED
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# define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
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#endif
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],
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[ int s;
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wait (&s);
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s = WIFEXITED (s) ? WEXITSTATUS (s) : 1;])],
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[ac_cv_header_sys_wait_h=yes],
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[ac_cv_header_sys_wait_h=no])])
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if test $ac_cv_header_sys_wait_h = yes; then
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AC_DEFINE(HAVE_SYS_WAIT_H, 1,
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[Define if you have <sys/wait.h> that is POSIX.1 compatible.])
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fi
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])# AC_HEADER_SYS_WAIT
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# AC_HEADER_TIME
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# --------------
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AC_DEFUN([AC_HEADER_TIME],
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[AC_CACHE_CHECK([whether time.h and sys/time.h may both be included],
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ac_cv_header_time,
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[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <sys/types.h>
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#include <sys/time.h>
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#include <time.h>
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],
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[if ((struct tm *) 0)
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return 0;])],
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[ac_cv_header_time=yes],
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[ac_cv_header_time=no])])
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if test $ac_cv_header_time = yes; then
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AC_DEFINE(TIME_WITH_SYS_TIME, 1,
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[Define if you can safely include both <sys/time.h> and <time.h>.])
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fi
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])# AC_HEADER_TIME
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# _AC_HEADER_TIOCGWINSZ_IN_TERMIOS_H
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# ----------------------------------
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m4_define([_AC_HEADER_TIOCGWINSZ_IN_TERMIOS_H],
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[AC_CACHE_CHECK([whether termios.h defines TIOCGWINSZ],
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ac_cv_sys_tiocgwinsz_in_termios_h,
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[AC_EGREP_CPP([yes],
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[#include <sys/types.h>
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#include <termios.h>
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#ifdef TIOCGWINSZ
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yes
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#endif
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],
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ac_cv_sys_tiocgwinsz_in_termios_h=yes,
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ac_cv_sys_tiocgwinsz_in_termios_h=no)])
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])# _AC_HEADER_TIOCGWINSZ_IN_TERMIOS_H
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# _AC_HEADER_TIOCGWINSZ_IN_SYS_IOCTL
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# ----------------------------------
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m4_define([_AC_HEADER_TIOCGWINSZ_IN_SYS_IOCTL],
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[AC_CACHE_CHECK([whether sys/ioctl.h defines TIOCGWINSZ],
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ac_cv_sys_tiocgwinsz_in_sys_ioctl_h,
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[AC_EGREP_CPP([yes],
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[#include <sys/types.h>
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#include <sys/ioctl.h>
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#ifdef TIOCGWINSZ
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yes
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#endif
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],
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ac_cv_sys_tiocgwinsz_in_sys_ioctl_h=yes,
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ac_cv_sys_tiocgwinsz_in_sys_ioctl_h=no)])
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])# _AC_HEADER_TIOCGWINSZ_IN_SYS_IOCTL
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# AC_HEADER_TIOCGWINSZ
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# --------------------
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# Look for a header that defines TIOCGWINSZ.
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# FIXME: Is this the proper name? Is this the proper implementation?
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# I need more help.
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AC_DEFUN([AC_HEADER_TIOCGWINSZ],
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[AC_REQUIRE([AC_SYS_POSIX_TERMIOS])dnl
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if test $ac_cv_sys_posix_termios = yes; then
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_AC_HEADER_TIOCGWINSZ_IN_TERMIOS_H
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fi
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if test $ac_cv_sys_tiocgwinsz_in_termios_h != yes; then
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_AC_HEADER_TIOCGWINSZ_IN_SYS_IOCTL
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if test $ac_cv_sys_tiocgwinsz_in_sys_ioctl_h = yes; then
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AC_DEFINE(GWINSZ_IN_SYS_IOCTL,1,
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[Define if `TIOCGWINSZ' requires <sys/ioctl.h>])
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fi
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fi
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])# AC_HEADER_TIOCGWINSZ
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# AU::AC_UNISTD_H
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# ---------------
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AU_DEFUN([AC_UNISTD_H],
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[AC_CHECK_HEADERS(unistd.h)])
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# AU::AC_USG
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# ----------
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# Define `USG' if string functions are in strings.h.
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AU_DEFUN([AC_USG],
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[AC_DIAGNOSE([obsolete],
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[$0: Remove `AC_MSG_CHECKING', `AC_TRY_LINK' and this `AC_WARNING'
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when you ajust your code to use HAVE_STRING_H.])dnl
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AC_MSG_CHECKING([for BSD string and memory functions])
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AC_TRY_LINK([@%:@include <strings.h>], [rindex(0, 0); bzero(0, 0);],
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[AC_MSG_RESULT(yes)],
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[AC_MSG_RESULT(no)
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AC_DEFINE(USG, 1,
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[Define if you do not have <strings.h>, index, bzero, etc...
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This symbol is obsolete, you should not depend upon it.])])
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AC_CHECK_HEADERS(string.h)])
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# AU::AC_MEMORY_H
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# ---------------
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# To be precise this macro used to be:
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#
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# | AC_MSG_CHECKING(whether string.h declares mem functions)
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# | AC_EGREP_HEADER(memchr, string.h, ac_found=yes, ac_found=no)
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# | AC_MSG_RESULT($ac_found)
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# | if test $ac_found = no; then
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# | AC_CHECK_HEADER(memory.h, [AC_DEFINE(NEED_MEMORY_H)])
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# | fi
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#
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# But it is better to check for both headers, and alias NEED_MEMORY_H to
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# HAVE_MEMORY_H.
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AU_DEFUN([AC_MEMORY_H],
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[AC_DIAGNOSE([obsolete], [$0: Remove this warning and
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`AC_CHECK_HEADER(memory.h, AC_DEFINE(...))' when you ajust your code to
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use and HAVE_STRING_H and HAVE_MEMORY_H, not NEED_MEMORY_H.])dnl
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AC_CHECK_HEADER(memory.h,
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[AC_DEFINE([NEED_MEMORY_H], 1,
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[Same as `HAVE_MEMORY_H', don't depend on me.])])
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AC_CHECK_HEADERS(string.h memory.h)
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])
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# AU::AC_DIR_HEADER
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# -----------------
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# Like calling `AC_HEADER_DIRENT' and `AC_FUNC_CLOSEDIR_VOID', but
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# defines a different set of C preprocessor macros to indicate which
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# header file is found.
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AU_DEFUN([AC_DIR_HEADER],
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[AC_HEADER_DIRENT
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AC_FUNC_CLOSEDIR_VOID
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AC_DIAGNOSE([obsolete],
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[$0: Remove this warning and the four `AC_DEFINE' when you
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ajust your code to use `AC_HEADER_DIRENT'.])
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test ac_cv_header_dirent_dirent_h &&
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AC_DEFINE([DIRENT], 1, [Same as `HAVE_DIRENT_H', don't depend on me.])
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test ac_cv_header_dirent_sys_ndir_h &&
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AC_DEFINE([SYSNDIR], 1, [Same as `HAVE_SYS_NDIR_H', don't depend on me.])
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test ac_cv_header_dirent_sys_dir_h &&
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AC_DEFINE([SYSDIR], 1, [Same as `HAVE_SYS_DIR_H', don't depend on me.])
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test ac_cv_header_dirent_ndir_h &&
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AC_DEFINE([NDIR], 1, [Same as `HAVE_NDIR_H', don't depend on me.])
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])
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