acinclude.m4

移植到WLIT项目的redboot源代码

dnl Process this file with aclocal to get an aclocal.m4 file. Then
dnl process that with autoconf.
dnl ====================================================================
dnl
dnl     acinclude.m4
dnl
dnl     Host side implementation of the eCos infrastructure.
dnl
dnl ====================================================================
dnl####COPYRIGHTBEGIN####
dnl                                                                         
dnl ----------------------------------------------------------------------------
dnl Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
dnl
dnl This file is part of the eCos host tools.
dnl
dnl This program is free software; you can redistribute it and/or modify it 
dnl under the terms of the GNU General Public License as published by the Free 
dnl Software Foundation; either version 2 of the License, or (at your option) 
dnl any later version.
dnl 
dnl This program is distributed in the hope that it will be useful, but WITHOUT 
dnl ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 
dnl FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for 
dnl more details.
dnl 
dnl You should have received a copy of the GNU General Public License along with
dnl this program; if not, write to the Free Software Foundation, Inc., 
dnl 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
dnl
dnl ----------------------------------------------------------------------------
dnl                                                                          
dnl####COPYRIGHTEND####
dnl ====================================================================
dnl#####DESCRIPTIONBEGIN####
dnl
dnl Author(s):	bartv
dnl Contact(s):	bartv
dnl Date:	1998/07/14
dnl Version:	0.01
dnl
dnl####DESCRIPTIONEND####
dnl ====================================================================

dnl Access shared macros.
dnl AM_CONDITIONAL needs to be mentioned here or else aclocal does not
dnl incorporate the macro into aclocal.m4
sinclude(../acinclude.m4)


dnl ====================================================================
dnl Look for a 64 bit data type. It is necessary to check both C and C++
dnl compilers.
dnl
dnl A better implementation would check whether or not AC_PROG_CC and
dnl AC_PROG_CXX have been invoked and only test the appropriate
dnl compiler.
dnl
dnl When cross-compiling, default to long long on the assumption that
dnl gcc/g++ must be used and long long is likely to be the 64 bit data
dnl type. This is not guaranteed, but sufficiently likely to meet
dnl the requirements for the time being. The CHECK_SIZEOF() macro
dnl might be another way to get the desired information.

AC_DEFUN(CYG_AC_TYPE_64bit, [
    AC_REQUIRE([AC_PROG_CC])
    AC_REQUIRE([AC_PROG_CXX])

    AC_CACHE_CHECK("for a 64 bit data type",cyg_ac_cv_type_64bit,[
        for type in "long" "long long" "__int64"; do
            AC_LANG_SAVE
	    AC_LANG_C
            AC_TRY_RUN([
                main() {
                    return 8 != sizeof($type);
                }
	    ],ctype_64bit=$type,ctype_64bit="unknown",ctype_64bit="long long")
	    AC_LANG_CPLUSPLUS
            AC_TRY_RUN([
                int main(int argc, char ** argv) {
                    return 8 != sizeof($type);
                }
	    ],cxxtype_64bit=$type,cxxtype_64bit="unknown",cxxtype_64bit="long long")
	    AC_LANG_RESTORE
            if test "${ctype_64bit}" = "${type}" -a "${cxxtype_64bit}" = "${type}"; then
                cyg_ac_cv_type_64bit="${type}"
                break
            fi
        done
    ])
    if test "${cyg_ac_cv_type_64bit}" = ""; then
        AC_MSG_ERROR(Unable to figure out how to do 64 bit arithmetic)
    else
        if test "${cyg_ac_cv_type_64bit}" != "long long"; then
            AC_DEFINE_UNQUOTED(cyg_halint64,${cyg_ac_cv_type_64bit})
            AC_DEFINE_UNQUOTED(cyg_halcount64,${cyg_ac_cv_type_64bit})
        fi
    fi
])

dnl ====================================================================
dnl Check that both the C and C++ compilers support __PRETTY_FUNCTION__

AC_DEFUN(CYG_AC_C_PRETTY_FUNCTION,[
    AC_REQUIRE([AC_PROG_CC])
    AC_REQUIRE([AC_PROG_CXX])

    AC_CACHE_CHECK("for __PRETTY_FUNCTION__ support",cyg_ac_cv_c_pretty_function,[
        AC_LANG_SAVE
        AC_LANG_C
        AC_TRY_LINK(
            [#include <stdio.h>],
            [puts(__PRETTY_FUNCTION__);],
            c_ok="yes",
            c_ok="no"
        )
        AC_LANG_CPLUSPLUS
        AC_TRY_LINK(
            [#include <cstdio>],
            [puts(__PRETTY_FUNCTION__);],
            cxx_ok="yes",
            cxx_ok="no"
        )
        AC_LANG_RESTORE
        if test "${c_ok}" = "yes" -a "${cxx_ok}" = "yes"; then
            cyg_ac_cv_c_pretty_function="yes"
        fi
    ])
    if test "${cyg_ac_cv_c_pretty_function}" = "yes"; then
        AC_DEFINE(CYGDBG_INFRA_DEBUG_FUNCTION_PSEUDOMACRO)
    fi
])