Subversion Repositories openrisc_2011-10-31

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     Various autoconf macros that are shared between different

dnl     eCos packages.

dnl

dnl ====================================================================

dnl ####ECOSHOSTGPLCOPYRIGHTBEGIN####

dnl ----------------------------------------------------------------------------

dnl Copyright (C) 2002, 2003 Bart Veer

dnl Copyright (C) 1998, 1999, 2000, 2001, 2002 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 ####ECOSHOSTGPLCOPYRIGHTEND####

dnl ====================================================================

dnl#####DESCRIPTIONBEGIN####

dnl

dnl Author(s):  bartv

dnl Contact(s): bartv

dnl Date:       1998/12/16

dnl Version:    0.01

dnl

dnl####DESCRIPTIONEND####

dnl ====================================================================

dnl ====================================================================

dnl Ensure that configure is not being run in the source tree, i.e.

dnl that a separate build tree has been created. This is not absolutely

dnl necessary at the time of writing but may become so in future, and

dnl is good practice.

AC_DEFUN(ECOS_CHECK_BUILD_ne_SRC,[

    AC_MSG_CHECKING([that a separate build tree is being used])

    ecos_cwd=`/bin/pwd`

    if test "${srcdir}" = "." ; then

        srcdir=${ecos_cwd}

    fi

    if test "${ecos_cwd}" = "${srcdir}" ; then

        AC_MSG_RESULT([no])

        AC_MSG_ERROR([This configure script should not be run inside the source tree. Instead please use a separate build tree])

    else

        AC_MSG_RESULT(yes)

    fi

])

dnl ====================================================================

dnl The AM_INIT_AUTOMAKE() will define a symbol VERSION for the

dnl package's version number. Unfortunately this symbol is rather

dnl hard to share if several different packages are involved, so this

dnl macro is used to define an alternative symbol

AC_DEFUN(ECOS_SUBST_VERSION,[

    AC_REQUIRE([AM_INIT_AUTOMAKE])

    ifelse($#,1,,AC_MSG_ERROR([Invalid number of arguments passed to ECOS SUBST_VERSION]))

    AC_DEFINE_UNQUOTED($1, "$VERSION")

])

dnl --------------------------------------------------------------------

dnl Convert a cygwin pathname to something acceptable to VC++ (but

dnl still invoked from bash and cygwin's make). This means using

dnl the cygpath utility and then translating any backslashes into

dnl forward slashes to avoid confusing make.

AC_DEFUN(ECOS_MSVC_PATH, [

    AC_REQUIRE([ECOS_PROG_MSVC])

    ifelse($#, 1, , AC_MSG_ERROR("Invalid number of arguments passed to ECOS MSVC_PATH"))

    if test "${MSVC}" = "yes" ; then

      $1=`cygpath -w ${$1} | tr \\\\\\\\ /`

    fi

])

dnl ====================================================================

dnl An internal utility to define eCos variants of various compilation

dnl related flags. The aim is to avoid messing with CFLAGS, LIBS, and

dnl so on because those are used for feature tests as well as for

dnl passing on to the application.

AC_DEFUN(ECOS_PROG_DEFINE_COMPILER_FLAGS,[

    ecos_CFLAGS=""

    ecos_CXXFLAGS=""

    ecos_LDADD=""

    ecos_INCLUDES=""

    ecos_LIBS=""

    AC_SUBST(ecos_CFLAGS)

    AC_SUBST(ecos_CXXFLAGS)

    AC_SUBST(ecos_LDADD)

    AC_SUBST(ecos_INCLUDES)

    AC_SUBST(ecos_LIBS)

])

dnl For historical reasons some of the eCos host-side software can be

dnl built with Visual C++ as well as g++. The user can specify this

dnl at configure time using CC=cl, where cl.exe is the compiler driver.

dnl This macro will set the variable MSVC to "yes" or to "no" depending

dnl on whether or not VC++ is being used, analogous to the variable

dnl GCC set by AC_PROG_CC. It provides support for an automake

dnl conditional thus allowing the makefile to adapt somewhat to the

dnl compiler being used. Finally it fills in the ECOS_INCLUDES,

dnl ECOS_LIBS and ECOS_LDADD variables with suitable initial values.

AC_DEFUN(ECOS_PROG_MSVC,[

    AC_REQUIRE([AC_PROG_CC])

    AC_REQUIRE([AC_PROG_CXX])

    AC_REQUIRE([ECOS_PROG_DEFINE_COMPILER_FLAGS])

    AC_MSG_CHECKING("for Visual C++")

    MSVC="no";

    if test "${CC}" = "cl" ; then

       MSVC="yes"

       CXX="cl"

       MSVC_SRCDIR=${srcdir}

       ECOS_MSVC_PATH(MSVC_SRCDIR)

       AC_SUBST(MSVC_SRCDIR)

       ecos_INCLUDES="${ecos_INCLUDES} \"-I${MSVC_SRCDIR}\""

       ecos_LDADD="-link"

       ecos_LIBS="advapi32.lib"

    fi

    AM_CONDITIONAL(MSVC, test "${MSVC}" = "yes")

    if test "${MSVC}" = "yes" ; then

        AC_MSG_RESULT([unfortunately yes])

    else

        AC_MSG_RESULT([no])

    fi

])

dnl ====================================================================

dnl Set up sensible flags for the various different compilers. This

dnl is achieved by manipulating AM-CFLAGS and AM-CXXFLAGS via a subst,

dnl plus undoing the setting of CFLAGS and CXXFLAGS done by

dnl the AC_PROC_CC and AC_PROG_CXX macros (e.g. setting the default

dnl compilation flags to -O2). Note that this relies

dnl on knowing about the internals of those macros.

dnl

dnl There is little point in checking the cache: this macro does

dnl not do any feature tests so checking the cache would probably

dnl be more expensive than doing the work here.

dnl

dnl For now the only supported compilers are gcc/g++ and VC++. Attempts

dnl to use another compiler will result in an error at configure-time.

AC_DEFUN(ECOS_PROG_STANDARD_COMPILER_FLAGS, [

    AC_REQUIRE([AC_PROG_CC])

    AC_REQUIRE([AC_PROG_CXX])

    AC_REQUIRE([ECOS_PROG_DEFINE_COMPILER_FLAGS])

    AC_REQUIRE([ECOS_PROG_MSVC])

    AC_MSG_CHECKING("the default compiler flags")

    dnl Add a user-settable flag to control whether or debugging info is

    dnl incorporated at compile-time.

    ecosflags_enable_debug="no"

    AC_ARG_ENABLE(debug,[ --enable-debug           do a debug rather than a release build],

    [case "${enableval}" in

       yes) ecosflags_enable_debug="yes" ;;

       *)   ecosflags_enable_debug="no" ;;

    esac])

    dnl For VC++ builds also provide a flag for ANSI vs. unicode builds.

    dnl For now this does not actually affect the compiler flags.

    dnl NOTE: there may also have to be a flag to control whether or

    dnl the VC++ multi-threading flags are enabled.

    ecosflags_enable_ansi="no"

    if test "${MSVC}" = "yes" ; then

      AC_ARG_ENABLE(ansi,[ --enable-ansi            do an ANSI rather than a unicode build],

      [case "${enableval}" in

         yes) ecosflags_enable_ansi="yes" ;;

         *)   ecosflags_enable_ansi="no" ;;

      esac])

    fi

    dnl Now we know what the user is after.

    if test "${GCC}" = "yes" ; then

        ecos_CFLAGS="${ecos_CFLAGS} -pipe -Wall -Wpointer-arith -Wbad-function-cast -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wnested-externs"

        ecos_CXXFLAGS="${ecos_CXXFLAGS} -pipe -Wall -Wpointer-arith -Wbad-function-cast -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wnested-externs -Woverloaded-virtual"

    elif test "${MSVC}" = "yes" ; then

        ecos_CFLAGS="${ecos_CFLAGS} -nologo -W3"

        ecos_CXXFLAGS="${ecos_CXXFLAGS} -nologo -W3 -GR -GX"

    else

        AC_MSG_ERROR("default flags for ${CC} are not known")

    fi

    dnl Choose between debugging and optimization.

    if test "${ecosflags_enable_debug}" = "yes" ; then

        if test "${GCC}" = "yes" ; then

            ecos_CFLAGS="${ecos_CFLAGS} -g -O0"

            ecos_CXXFLAGS="${ecos_CXXFLAGS} -g -O0"

        elif test "${MSVC}" = "yes" ; then

            ecos_CFLAGS="${ecos_CFLAGS} -MDd -Zi"

            ecos_CXXFLAGS="${ecos_CXXFLAGS} -MDd -Zi"

        fi

    else

        dnl For now building with g++ implies -O0 rather than -O2. The

        dnl compile-time performance of g++ at -O2 has been disappointing

        dnl for quite some time, and the eCos host-side code is not

        dnl sufficiently cpu-intensive to require -O2.

        if test "${GCC}" = "yes" ; then

            ecos_CFLAGS="${ecos_CFLAGS} -O0"

            ecos_CXXFLAGS="${ecos_CXXFLAGS} -O0"

        elif test "${MSVC}" = "yes" ; then

            ecos_CFLAGS="${ecos_CFLAGS} -MD -O2"

            ecos_CXXFLAGS="${ecos_CXXFLAGS} -MD -O2"

        fi

    fi

    CFLAGS="${ac_save_CFLAGS}"

    CXXFLAGS="${ac_save_CXXFLAGS}"

    AC_MSG_RESULT(done)

])

dnl --------------------------------------------------------------------

dnl User-settable options for assertions and tracing.

dnl

dnl The settable options are:

dnl   --disable-asserts

dnl   --disable-preconditions

dnl   --disable-postconditions

dnl   --disable-invariants

dnl   --disable-loopinvariants

dnl   --disable-tracing

dnl   --disable-fntracing

AC_DEFUN(ECOS_ARG_INFRASTRUCTURE, [

    AC_REQUIRE([ECOS_PROG_STANDARD_COMPILER_FLAGS])

    if test "${ecosflags_enable_debug}" = "yes" ; then

        ecosinfra_asserts="yes"

        ecosinfra_preconditions="yes"

        ecosinfra_postconditions="yes"

        ecosinfra_invariants="yes"

        ecosinfra_loopinvariants="yes"

        ecosinfra_tracing="yes"

        ecosinfra_fntracing="yes"

    else

        ecosinfra_asserts="no"

        ecosinfra_preconditions="no"

        ecosinfra_postconditions="no"

        ecosinfra_invariants="no"

        ecosinfra_loopinvariants="no"

        ecosinfra_tracing="no"

        ecosinfra_fntracing="no"

    fi

    AC_ARG_ENABLE(asserts,[ --disable-asserts        disable all assertions],

        [case "${enableval}" in

            yes) ecosinfra_asserts="yes" ;;

            no)  ecosinfra_asserts="no"  ;;

            *)   AC_MSG_ERROR([bad value ${enableval} for disable-asserts option]) ;;

        esac])

    if test "${ecosinfra_asserts}" = "yes"; then

        AC_DEFINE(CYGDBG_USE_ASSERTS)

    fi

    AC_ARG_ENABLE(preconditions, [ --disable-preconditions  disable a subset of the assertions],

        [case "${enableval}" in

            yes) ecosinfra_preconditions="yes" ;;

            no)  ecosinfra_preconditions="no"  ;;

            *)   AC_MSG_ERROR([bad value ${enableval} for disable-preconditions option]) ;;

        esac])

    if test "${ecosinfra_preconditions}" = "yes"; then

        AC_DEFINE(CYGDBG_INFRA_DEBUG_PRECONDITIONS)

    fi

    AC_ARG_ENABLE(postconditions, [ --disable-postconditions disable a subset of the assertions],

        [case "${enableval}" in

            yes) ecosinfra_postconditions="yes" ;;

            no)  ecosinfra_postconditions="no"  ;;

            *)   AC_MSG_ERROR([bad value ${enableval} for disable-postconditions option]) ;;

        esac])

    if test "${ecosinfra_postconditions}" = "yes"; then

        AC_DEFINE(CYGDBG_INFRA_DEBUG_POSTCONDITIONS)

    fi

    AC_ARG_ENABLE(invariants, [ --disable-invariants     disable a subset of the assertions],

        [case "${enableval}" in

            yes) ecosinfra_invariants="yes" ;;

            no)  ecosinfra_invariants="no"  ;;

            *)   AC_MSG_ERROR([bad value ${enableval} for disable-invariants option]) ;;

        esac])

    if test "${ecosinfra_invariants}" = "yes"; then

        AC_DEFINE(CYGDBG_INFRA_DEBUG_INVARIANTS)

    fi

    AC_ARG_ENABLE(loopinvariants, [ --disable-loopinvariants disable a subset of the assertions],

        [case "${enableval}" in

            yes) ecosinfra_loopinvariants="yes" ;;

            no)  ecosinfra_loopinvariants="no"  ;;

            *)   AC_MSG_ERROR([bad value ${enableval} for disable-loopinvariants option]) ;;

        esac])

    if test "${ecosinfra_loopinvariants}" = "yes"; then

        AC_DEFINE(CYGDBG_INFRA_DEBUG_LOOP_INVARIANTS)

    fi

    AC_ARG_ENABLE(tracing,[ --disable-tracing        disable tracing],

        [case "${enableval}" in

            yes) ecosinfra_tracing="yes" ;;

            no)  ecosinfra_tracing="no"  ;;

            *)   AC_MSG_ERROR([bad value ${enableval} for disable-tracing option]) ;;

        esac])

    if test "${ecosinfra_tracing}" = "yes"; then

        AC_DEFINE(CYGDBG_USE_TRACING)

    fi

    AC_ARG_ENABLE(fntracing,[ --disable-fntracing      disable function entry/exit tracing],

        [case "${enableval}" in

            yes) ecosinfra_fntracing="yes" ;;

            no)  ecosinfra_fntracing=no  ;;

            *)   AC_MSG_ERROR([bad value ${enableval} for disable-fntracing option]) ;;

    esac])

    if test "${ecosinfra_fntracing}" = "yes"; then

        AC_DEFINE(CYGDBG_INFRA_DEBUG_FUNCTION_REPORTS)

    fi

])

dnl ====================================================================

dnl Inspired by KDE's autoconfig

dnl This macro takes three Arguments like this:

dnl AC_FIND_FILE(foo.h, $incdirs, incdir)

dnl the filename to look for, the list of paths to check and

dnl the variable with the result.

AC_DEFUN(AC_FIND_FILE,[

    $3=""

    for i in $2; do

        if test -r "$i/$1"; then

            $3=$i

            break

        fi

    done

])

dnl ====================================================================

dnl Variation of the above.

dnl This macro takes three Arguments like this:

dnl AC_FIND_DIR(infra, $incdirs, incdir)

dnl the directory name to look for, the list of paths to check and

dnl the variable with the result.

AC_DEFUN(AC_FIND_DIR,[

    $3=""

    for i in $2; do

        if test -d "$i/$1"; then

            $3=$i

            break

        fi

    done

])

dnl ====================================================================

dnl Work out details of the Tcl/tk installation that should be used.

dnl In theory this is simple: when Tcl is installed in <tcl_prefix>

dnl (usually /usr) there should be a file <tcl_prefix>/lib/tclConfig.sh

dnl which defines exactly how to build Tcl-based applications. Of course

dnl Tcl may be installed anywhere, not just in /usr, so it is necessary

dnl to do some searching. There is a command-line argument

dnl --with-tcl=<path> to specify the Tcl installation, so the macro

dnl can search for <with_tcl>/lib/tclConfig.sh, <prefix>/lib/tclConfig.sh

dnl and /usr/lib/tclConfig.sh

dnl

dnl Unfortunately not all systems use this convention. For example,

dnl at the time of writing Debian installs tclConfig.sh in a versioned

dnl subdirectory /usr/lib/tcl8.3/tclConfig.sh. Hence there is an

dnl additional argument --with-tcl-version=<vsn> which is used to

dnl extend the search path.

dnl

dnl For VC++ builds the situation is different again. Tcl may be

dnl installed anywhere, so the data in tclConfig.sh is not useful

dnl (and that file may not be provided at all). Instead --with-tcl

dnl must be used to specify the path. Alternatively separate paths

dnl for headers and libraries can be specified using --with-tcl-header

dnl and --with-tcl-lib. Usually it will also be necessary to specify

dnl the library version number using --with-tcl-version.

dnl This adds two main command-line options, --with-tcl=<prefix> to

dnl specify the Tcl install directory, and --with-tcl-version=<vsn>

dnl to control which version of Tcl should be used. For finer-grained

dnl control there are additional options --with-tcl-header and

dnl --with-tcl-version. It is assumed that Tcl and Tk are installed

dnl in the same place.

dnl

dnl On Unix systems and under cygwin there should be a file

dnl $(tcl_prefix)/lib/tclConfig.sh containing all the information

dnl needed for Tcl. This file is consulted and the appropriate

dnl variables extracted. Similar information for Tk lives in

dnl tkConfig.sh. As a useful side effect all variables defined

dnl in those scripts can be accessed.

dnl

dnl To confuse matters, subtly different naming conventions are used

dnl under Unix and NT. Under Unix the Tcl library will be called

dnl libtcl8.0.a, libtcl8.1.a, etc. with a dot between the major and

dnl minor version. Under NT (including cygwin) the library will be

dnl called tcl80.lib, tcl81.lib, libtcl80.a, libtcl81.a, etc.

dnl without a dot.

dnl

dnl Currently this macro assumes that Tcl is preinstalled, and not

dnl built alongside eCos. Specifically the macro checks that

dnl tcl.h  can be found, plus on Unix systems tclConfig.sh and

dnl tkConfig.sh as well.

dnl

dnl This macro updates the build-related variables ecos_INCLUDES,

dnl ecos_LDADD, and ecos_LIBS. The latter assumes the application

dnl only needs Tcl. If Tk is needed as well then the variable

dnl ecos_tklibs should be used in addition.

AC_DEFUN(ECOS_PATH_TCL, [

    AC_REQUIRE([ECOS_PROG_MSVC])

    AC_REQUIRE([AC_CYGWIN])

    ecos_tk_libs=""

    ecos_tk_libdir=""

    dnl Where is the Tcl installation, and what version should be used?

    AC_MSG_CHECKING(for Tcl installation)

    AC_ARG_WITH(tcl,[ --with-tcl=<path>        location of Tcl header and libraries])

    AC_ARG_WITH(tcl-version,[ --with-tcl-version=<vsn> version of Tcl to be used])

    dnl If using VC++ then there are no sensible default directories

    dnl to search for a Tcl installation. Instead the user must

    dnl supply either --with-tcl, or both --with-tcl-header and

    dnl --with-tcl-lib.

    dnl

    dnl Also when using VC++ there is no tclConfig.sh file to

    dnl consult about which libraries are needed. Instead that

    dnl information is hard-wired here.

    if test "${MSVC}" = "yes" ; then

        AC_ARG_WITH(tcl-header,[ --with-tcl-header=<path> location of Tcl header])

        AC_ARG_WITH(tcl-lib,[ --with-tcl-lib=<path>    location of Tcl libraries])

        ecos_tcl_incdir=""

        ecos_tcl_libdir=""

        if test "${with_tcl_version+set}" != set ; then

            AC_MSG_ERROR(You must specify a Tcl version using --with-tcl-version=<vsn>)

        fi

        if test "${with_tcl_header+set}" = set ; then

            ecos_tcl_incdir=${with_tcl_header}

        elif test "${with_tcl+set}" = set ; then

            ecos_tcl_incdir="${with_tcl}/include"

        else

            AC_MSG_ERROR(You must specify a Tcl installation with either --with-tcl=<path> or --with-tcl-header=<path>)

        fi

        if test "${with_tcl_lib+set}" = set; then

            ecos_tcl_libdir=${with_tcl_lib}

        elif test "${with_tcl+set}" = set; then

            ecos_tcl_libdir="${with_tcl}/lib"

        else

            AC_MSG_ERROR(You must specify a Tcl installation with either --with-tcl=<path> or --with-tcl-lib=<path>)

        fi

        dnl Sanity check, make sure that there is a tcl.h header file.

        dnl If not then there is no point in proceeding.

        if test \! -r "${ecos_tcl_incdir}/tcl.h" ; then

            AC_MSG_ERROR([unable to locate Tcl header file tcl.h])

        fi

        ECOS_MSVC_PATH(ecos_tcl_incdir)

        ECOS_MSVC_PATH(ecos_tcl_libdir)

        ecos_INCLUDES="${ecos_INCLUDES} \"-I${ecos_tcl_incdir}\""

        ecos_LIBS="${ecos_LIBS} tcl${with_tcl_version}.lib"

        ecos_LDADD="${ecos_LDADD} \"-libpath=${ecos_tcl_libdir}\""

        dnl FIXME: what libraries are needed for a tk application under VC++?

        dnl        and can the version be determined more accurately?

        ecos_tk_libs=""

    else

        dnl Try to find tclConfig.sh

        possibles=""

        if test "${with_tcl+set}" = set ; then

            possibles="${with_tcl}/lib"

            if test "${with_tcl_version+set}" = set ; then

                possibles="${possibles} ${with_tcl}/lib/tcl${with_tcl_version}"

            fi

        fi

        possibles="${possibles} ${prefix}/lib"

        if test "${with_tcl_version+set}" = set ; then

            possibles="${possibles} ${prefix}/lib/tcl${with_tcl_version}"

        fi

        possibles="${possibles} /usr/lib"

        if test "${with_tcl_version+set}" = set ; then

            possibles="${possibles} /usr/lib/tcl${with_tcl_version}"

        fi

        AC_FIND_FILE("tclConfig.sh", ${possibles}, tclconfig)

        if test \! -r "${tclconfig}/tclConfig.sh" ; then

            AC_MSG_ERROR(unable to locate Tcl configuration file tclConfig.sh)

        else

            . ${tclconfig}/tclConfig.sh

            dnl Now we need to figure out where to find the Tcl header files.

            dnl tclConfig.sh may define a variable TCL_INC_DIR, otherwise

            dnl use TCL_PREFIX/include

            if test -z "${TCL_INC_DIR}" ; then

                ecos_tcl_incdir="${TCL_PREFIX}/include"

            else

                ecos_tcl_incdir="${TCL_INC_DIR}"

            fi

            if test \! -r "${ecos_tcl_incdir}/tcl.h" ; then

                AC_MSG_ERROR(unable to locate Tcl header file tcl.h)

            else

                dnl On Unix systems -I/usr/include is unnecessary, and can

                dnl cause problems on hosts where gcc is not the platform's

                dnl default compiler because of the use of unfixed headers.

                dnl Hence it is explicitly removed here.

                if test "${ecos_tcl_incdir}" != "/usr/include" ; then

                    ecos_INCLUDES="${ecos_INCLUDES} -I${ecos_tcl_incdir}"

                fi

            fi

            dnl There should be a variable TCL_LIB_SPEC which defines

            dnl exactly how to link with Tcl. Unfortunately this is not

            dnl 100% guaranteed, so a backup solution is still needed.

            dnl NOTE: there is also TCL_LIBS defining additional libraries

            dnl such as -ldl. That may have to be added to ecos_LIBS.

            if test -z "${TCL_LIB_SPEC}" -a "${with_tcl_version+set}" = set ; then

                AC_FIND_FILE("libtcl${with_tcl_version}.a", ${possibles}, libtcl)

                if test -r "${libtcl}/libtcl${with_tcl_version}.a" ; then

                    TCL_LIB_SPEC="-L${libtcl} -ltcl${with_tcl_version}"

                fi

            fi

            if test -z "${TCL_LIB_SPEC}" ; then

                AC_FIND_FILE("libtcl.a", ${possibles}, libtcl)

                if test -r "${libtcl}/libtcl.a" ; then

                    TCL_LIB_SPEC="-L${libtcl} -ltcl"

                fi

            fi

            if test -z "${TCL_LIB_SPEC}" ; then

                AC_MSG_ERROR(${tclconfig}/tclConfig.sh does not define TCL_LIB_SPEC, and unable to find libtcl.a)

            fi

            ecos_LIBS="${ecos_LIBS} ${TCL_LIB_SPEC}"

            dnl Next, look for tkConfig.sh

            possibles=`echo ${possibles} | sed -e 's,tcl,tk,g'`

            AC_FIND_FILE("tkConfig.sh", ${possibles}, tkconfig)

            if test \! -r "${tkconfig}/tkConfig.sh" ; then

                AC_MSG_ERROR(unable to locate Tk config file tkConfig.sh)

            else

                . ${tkconfig}/tkConfig.sh

                if test -z "${TK_INC_DIR}" ; then

                    if test "${TK_PREFIX}" = "/usr" ; then

                        ecos_tk_includes="${TK_XINCLUDES}"

                    else

                        ecos_tk_includes="-I${TK_PREFIX}/include ${TK_XINCLUDES}"

                    fi

                else

                    ecos_tk_includes="-I${TK_INC_DIR} ${TK_XINCLUDES}"

                fi

                dnl As with TCL_LIB_SPEC, TK_LIB_SPEC may be empty

                if test -z "${TK_LIB_SPEC}" -a "${with_tcl_version+set}" = set ; then

                    AC_FIND_FILE("libtk${with_tcl_version}.a", ${possibles}, libtk)

                    if test -r "${libtk}/libtk${with_tcl_version}.a" ; then

                        TK_LIB_SPEC="-L${libtk} -ltk${with_tcl_version}"

                    fi

                fi

                if test -z "${TK_LIB_SPEC}" ; then

                    AC_FIND_FILE("libtk.a", ${possibles}, libtk)

                    if test -r "${libtk}/libtk.a" ; then

                        TK_LIB_SPEC="-L${libtk} -ltk"

                    fi

                fi

                if test -z "${TK_LIB_SPEC}" ; then

                    AC_MSG_ERROR(${tkconfig}/tkConfig.sh does not define TK_LIB_SPEC, and unable to find libtk.a)

                fi

                ecos_tk_libs="${TK_LIB_SPEC} ${TK_LIBS}"

            fi

        fi

    fi

    AC_MSG_RESULT([-I${ecos_tcl_incdir} ${TCL_LIB_SPEC}])

    AC_SUBST(ecos_tk_includes)

    AC_SUBST(ecos_tk_libs)

])

dnl ====================================================================

dnl Search for the infrastructure headers. Usually these can be picked

dnl up from host/infra in the build tree. This macro updates

dnl ecos_INCLUDES, ecos_LDADD and ecos_LIBS appropriately. In addition

dnl it defines new variables ecos_infra_incdir and ecos_infra_libdir,

dnl useful for listing explicit dependencies.

dnl

dnl This macro should only be used in configure scripts that run after

dnl the infrastructure has been configured because it relies on the

dnl infra directory already having been created in the build tree.

AC_DEFUN(ECOS_PATH_INFRA, [

    AC_MSG_CHECKING([for eCos host-side infrastructure])

    dnl Where are we in the build tree? First assume that we are in the host

    dnl tree, thus allowing configury of just the host-side. If that fails

    dnl assume we can be anywhere.

    infra_builddir=""

    possibles=".. ../.. ../../.. ../../../.. ../../../../.."

    AC_FIND_DIR("infra", ${possibles}, infra_builddir)

    if test "${infra_builddir}" = "" ; then

      possibles="../host ../../host ../../../host ../../../../host ../../../../../host ../../../../../../host"

      AC_FIND_DIR("infra", ${possibles}, infra_builddir)

    fi

    if test "${infra_builddir}" != "" ; then

        infra_builddir="${infra_builddir}/infra"

        infra_builddir=`cd ${infra_builddir} && /bin/pwd`

    fi

    ecos_infra_incdir=""

    ecos_infra_libdir=""

    ecos_infra_libs=""

    AC_ARG_WITH(infra-header,[ --with-infra-header=<path> location of eCos infrastructure headers])

    AC_ARG_WITH(infra-lib,[ --with-infra-lib=<path>    location of eCos infrastructure library])

    AC_ARG_WITH(infra,[ --with-infra=<path>        location of eCos infrastructure installation])

    if test "${with_infra_header+set}" = "set"; then

        ecos_infra_incdir="${with_infra_header}"

    elif test "${with_infra+set}" = "set"; then

        ecos_infra_incdir="${with_infra}/include"

    elif test "${infra_builddir}" != "" ; then

        ecos_infra_incdir="${infra_builddir}"

    else

        AC_MSG_ERROR([infrastructure headers not found])

    fi

    if test "${MSVC}" = "yes" ; then

        ecos_msvc_infra_incdir=${ecos_infra_incdir}

        ECOS_MSVC_PATH(ecos_msvc_infra_incdir)

        ecos_INCLUDES="${ecos_INCLUDES} \"-I${ecos_msvc_infra_incdir}\""

    else

        ecos_INCLUDES="${ecos_INCLUDES} -I${ecos_infra_incdir}"

    fi

    if test "${with_infra_lib+set}" = "set"; then

        ecos_infra_libdir="${with_infra_lib}"

    elif test "${with_infra+set}" = "set"; then

        ecos_infra_libdir="${with_infra}/lib"

    elif test "${infra_builddir}" != "" ; then

        ecos_infra_libdir="${infra_builddir}"

    else

        AC_MSG_ERROR([infrastructure library not found])

    fi

    if test "${MSVC}" = "yes" ; then

        ecos_msvc_infra_libdir=${ecos_infra_libdir}

        ECOS_MSVC_PATH(ecos_msvc_infra_libdir)

        ecos_LIBS="${ecos_LIBS} cyginfra.lib"

        ecos_LDADD="${ecos_LDADD} \"-libpath=${ecos_msvc_infra_libdir}\""

    else

        ecos_LIBS="${ecos_LIBS} -lcyginfra"

        ecos_LDADD="${ecos_LDADD} -L${ecos_infra_libdir}"

    fi

    AC_SUBST(ecos_infra_incdir)

    AC_SUBST(ecos_infra_libdir)

    AC_MSG_RESULT(-I[${ecos_infra_incdir} -L${ecos_infra_libdir}])

])

dnl ====================================================================

dnl And a very similar macro for libcdl, but note that the headers

dnl are in the source tree rather than the build tree.

AC_DEFUN(ECOS_PATH_LIBCDL, [

    AC_MSG_CHECKING([for libcdl])

    dnl Where are we in the source tree?

    libcdl_srcdir=""

    possibles="${srcdir}/.. ${srcdir}/../.. ${srcdir}/../../.. ${srcdir}/../../../.. ${srcdir}/../../../../.."

    AC_FIND_DIR("libcdl", ${possibles}, libcdl_srcdir)

    if test "${libcdl_srcdir}" = "" ; then

      possibles="${srcdir}/../host ${srcdir}/../../host ${srcdir}/../../../host ${srcdir}/../../../../host ${srcdir}/../../../../../host ${srcdir}/../../../../../../host"

      AC_FIND_DIR("libcdl", ${possibles}, libcdl_srcdir)

    fi

    if test "${libcdl_srcdir}" != "" ; then

        libcdl_srcdir="${libcdl_srcdir}/libcdl"

        libcdl_srcdir=`cd ${libcdl_srcdir} && /bin/pwd`

    fi

    dnl And where are we in the build tree?

    libcdl_builddir=""

    possibles=".. ../.. ../../.. ../../../.. ../../../../.."

    AC_FIND_DIR("libcdl", ${possibles}, libcdl_builddir)

    if test "${libcdl_builddir}" = "" ; then

      possibles="../host ../../host ../../../host ../../../../host ../../../../../host ../../../../../../host"

      AC_FIND_DIR("libcdl", ${possibles}, libcdl_builddir)

    fi

    if test "${libcdl_builddir}" != "" ; then

        libcdl_builddir="${libcdl_builddir}/libcdl"

        libcdl_builddir=`cd ${libcdl_builddir} && /bin/pwd`

    fi

    ecos_libcdl_incdir=""

    ecos_libcdl_libdir=""

    ecos_libcdl_libs=""

    AC_ARG_WITH(libcdl-header,[ --with-libcdl-header=<path> location of eCos libcdl headers])

    AC_ARG_WITH(libcdl-lib,[ --with-libcdl-lib=<path>    location of eCos libcdl library])

    AC_ARG_WITH(libcdl,[ --with-libcdl=<path>        location of eCos libcdl installation])

    if test "${with_libcdl_header+set}" = "set"; then

        ecos_libcdl_incdir="${with_libcdl_header}"

    elif test "${with_libcdl+set}" = "set"; then

        ecos_libcdl_incdir="${with_libcdl}/include"

    elif test "${libcdl_srcdir}" != "" ; then

        ecos_libcdl_incdir="${libcdl_srcdir}"

    fi

    if test \! -r "${ecos_libcdl_incdir}/cdl.hxx" ; then

        AC_MSG_ERROR([libcdl headers not found])

    fi

    if test "${MSVC}" = "yes" ; then

        ecos_msvc_libcdl_incdir="${ecos_libcdl_incdir}"

        ECOS_MSVC_PATH(ecos_msvc_libcdl_incdir)

        ecos_INCLUDES="${ecos_INCLUDES} \"-I${ecos_msvc_libcdl_incdir}\""

    else

        ecos_INCLUDES="${ecos_INCLUDES} -I${ecos_libcdl_incdir}"

    fi

    if test "${with_libcdl_lib+set}" = "set"; then

        ecos_libcdl_libdir="${with_libcdl_lib}"

    elif test "${with_libcdl+set}" = "set"; then

        ecos_libcdl_libdir="${with_libcdl}/lib"

    elif test "${libcdl_builddir}" != "" ; then

        ecos_libcdl_libdir="${libcdl_builddir}"

    else

        AC_MSG_ERROR([libcdl library not found])

    fi

    if test "${MSVC}" = "yes" ; then

        ecos_msvc_libcdl_libdir=${ecos_libcdl_libdir}

        ECOS_MSVC_PATH(ecos_msvc_libcdl_libdir)

        ecos_LIBS="${ecos_LIBS} cdl.lib"

        ecos_LDADD="${ecos_LDADD} \"-libpath=${ecos_msvc_libcdl_libdir}\""

    else

        ecos_LIBS="${ecos_LIBS} -lcdl"

        ecos_LDADD="${ecos_LDADD} -L${ecos_libcdl_libdir}"

    fi

    AC_SUBST(ecos_libcdl_incdir)

    AC_SUBST(ecos_libcdl_libdir)

    AC_MSG_RESULT([-I${ecos_libcdl_incdir} -L${ecos_libcdl_libdir}])

])

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(ECOS_TYPE_64bit, [

    AC_REQUIRE([AC_PROG_CC])

    AC_REQUIRE([AC_PROG_CXX])

    AC_CACHE_CHECK("for a 64 bit data type",ecos_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

                ecos_cv_type_64bit="${type}"

                break

            fi

        done

    ])

    if test "${ecos_cv_type_64bit}" = ""; then

        AC_MSG_ERROR(Unable to figure out how to do 64 bit arithmetic)

    else

        if test "${ecos_cv_type_64bit}" != "long long"; then

            AC_DEFINE_UNQUOTED(cyg_halint64,${ecos_cv_type_64bit})

            AC_DEFINE_UNQUOTED(cyg_halcount64,${ecos_cv_type_64bit})

        fi

    fi

])

dnl ====================================================================

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

AC_DEFUN(ECOS_C_PRETTY_FUNCTION,[

    AC_REQUIRE([AC_PROG_CC])

    AC_REQUIRE([AC_PROG_CXX])

    AC_CACHE_CHECK("for __PRETTY_FUNCTION__ support",ecos_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

            ecos_cv_c_pretty_function="yes"

        fi

    ])

    if test "${ecos_cv_c_pretty_function}" = "yes"; then

        AC_DEFINE(CYGDBG_INFRA_DEBUG_FUNCTION_PSEUDOMACRO)

    fi

])

dnl ====================================================================

dnl During installation eCos package-specific host-side code should be

dnl versioned in the same way as the packages themselves, allowing

dnl different versions to coexist in one installation. This is analogous

dnl to having multiple versions of a shared library installed so that

dnl applications can load whichever one they were linked with.

dnl

dnl To support all this the host-side code needs access to a number

dnl of directory names:

dnl     ECOS_REPOSITORY    e.g. ~/ecc/ecc

dnl     PACKAGE_DIR        e.g. hal/synth/arch

dnl     PACKAGE_VERSION    e.g. current

dnl     PACKAGE_INSTALL    e.g. hal/synth/arch/current

dnl

dnl These, together with the standard variable libexecdir, allow

dnl the host-side code to navigate around both source and install

dnl trees.

AC_DEFUN(ECOS_PACKAGE_DIRS,[

    dnl srcdir will be something like <path>/packages/<package_path>/<version>/host

    package_dir=`cd ${srcdir} && /bin/pwd`

    PACKAGE_VERSION=`dirname ${package_dir}`

    PACKAGE_VERSION=`basename ${PACKAGE_VERSION}`

    dnl Now look for an "acsupport" directory as a good way of identifying

    dnl the root of the repository. Assume that this does not clash with

    dnl any real packages in the repository. Also assume that no silly games

    dnl are being played with symlinks.

    package_dir=`dirname ${package_dir}`

    package_dir=`dirname ${package_dir}`

    possibles="${package_dir}/.. ${package_dir}/../.. ${package_dir}/../../.. ${package_dir}/../../../.."

    possibles="${possibles} ${package_dir}/../../../../.. ${package_dir}/../../../../../.."

    AC_FIND_DIR("acsupport", ${possibles}, repository_root)

    if test "${repository_root}" = "" ; then

        AC_MSG_ERROR([Failed to identify this package's position within the eCos repository])

    fi

    dnl repository_root will still contain the ..'s, instead of an absolute path

    ECOS_REPOSITORY=`cd "${repository_root}/packages/pkgconf/.." && /bin/pwd`

    dnl Now we have two absolute paths, so just remove one from the other

    PACKAGE_DIR=`echo ${package_dir} | sed -e "s:${ECOS_REPOSITORY}/::"`

    dnl To avoid creating too many subdirectories on the host-side, turn

    dnl e.g. hal/synth/arch into hal_synth_arch. Theoretically this could

    dnl go wrong because multiple packages could map onto the same string,

    dnl but in practice there should be a net reduction in complexity.

    dnl bartv: / to _ conversion disabled for now, 5 March 2002

    PACKAGE_INSTALL="${PACKAGE_DIR}/${PACKAGE_VERSION}"

    dnl PACKAGE_INSTALL=`echo ${PACKAGE_INSTALL} | sed -e "s:/:_:g"`

    AC_SUBST(ECOS_REPOSITORY)

    AC_SUBST(PACKAGE_DIR)

    AC_SUBST(PACKAGE_VERSION)

    AC_SUBST(PACKAGE_INSTALL)

])