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#------------------------------------------------------------------------------

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# $Id$

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#------------------------------------------------------------------------------

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AC_PREREQ(2.59)

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AC_CONFIG_AUX_DIR([autoconf])

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AM_INIT_AUTOMAKE([-Wall -Werror dist-bzip2])

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AC_PREFIX_DEFAULT([/opt/etherlab])

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AC_CONFIG_HEADERS([config.h])

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AC_CONFIG_SRCDIR([config.h.in])

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#------------------------------------------------------------------------------

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# Global

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#------------------------------------------------------------------------------

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branch=trunk

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AC_DEFINE_UNQUOTED(BRANCH, ["$branch"], [Subversion branch])

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AC_SUBST(BRANCH, [$branch])

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#------------------------------------------------------------------------------

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# Linux sources

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#------------------------------------------------------------------------------

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AC_ARG_WITH([linux-dir],

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    AC_HELP_STRING(

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        [--with-linux-dir=<DIR>],

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        [Linux kernel sources @<:@running kernel@:>@]

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    ),

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    [

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        sourcedir=[$withval]

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    ],

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    [

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        version=[`uname -r`]

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        modulesdir=/lib/modules/${version}

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        if test \! -d ${modulesdir} || test \! -d ${modulesdir}/build; then

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           echo

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           AC_MSG_ERROR([Failed to find Linux sources. Use --with-linux-dir!])

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        fi

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        sourcedir=`cd ${modulesdir}/build && pwd -P`

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    ]

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)

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AC_MSG_CHECKING([for Linux kernel sources])

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if test \! -r ${sourcedir}/.config; then

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    echo

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    AC_MSG_ERROR([No configured Linux kernel sources in $sourcedir])

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fi

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# Try to get kernel release string

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if test -r ${sourcedir}/include/config/kernel.release; then

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    kernelrelease=`cat $sourcedir/include/config/kernel.release`

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elif test -r ${sourcedir}/.kernelrelease; then

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    kernelrelease=`cat $sourcedir/.kernelrelease`

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elif test -r ${sourcedir}/include/linux/utsrelease.h; then

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    hdr=${sourcedir}/include/linux/utsrelease.h

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    kernelrelease=`grep UTS_RELEASE $hdr | cut -d " " -f 3- | tr -d \"`

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elif test -r ${sourcedir}/include/linux/version.h; then

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    hdr=${sourcedir}/include/linux/version.h

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    kernelrelease=`grep UTS_RELEASE $hdr | cut -d " " -f 3- | tr -d \"`

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fi

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if test -z "$kernelrelease"; then

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    echo

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    AC_MSG_ERROR([Failed to extract Linux kernel version!])

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fi

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# Extract three numbers from kernel release string

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linuxversion=`echo $kernelrelease | grep -oE "^[[0-9]]+\.[[0-9]]+\.[[0-9]]+"`

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AC_SUBST(LINUX_SOURCE_DIR,[$sourcedir])

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AC_SUBST(LINUX_KERNEL_RELEASE,[$kernelrelease])

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AC_SUBST(LINUX_KERNEL_VERSION,[$linuxversion])

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AC_SUBST(LINUX_MOD_PATH,[/lib/modules/$kernelrelease/ethercat])

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AC_MSG_RESULT([$LINUX_SOURCE_DIR (Kernel $LINUX_KERNEL_RELEASE)])

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#------------------------------------------------------------------------------

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# 8139too Kernel

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#------------------------------------------------------------------------------

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AC_ARG_WITH([8139too-kernel],

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    AC_HELP_STRING(

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        [--with-8139too-kernel=<X.Y.Z>],

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        [8139too kernel (only if differing)]

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    ),

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    [

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        kernel8139too=[$withval]

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    ],

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    [

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        kernel8139too=$linuxversion

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    ]

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)

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AC_MSG_CHECKING([for kernel for 8139too driver])

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kernels=`ls -1 devices/ | grep -oE "^8139too-.*-" | cut -d "-" -f 2 | uniq`

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found=0

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for k in $kernels; do

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    if test "$kernel8139too" = "$k"; then

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        found=1

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    fi

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done

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if test $found -ne 1; then

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    AC_MSG_ERROR([kernel $kernel8139too not available for 8139too driver!])

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fi

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AC_MSG_RESULT([$kernel8139too])

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#------------------------------------------------------------------------------

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# RTAI path (optional)

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#------------------------------------------------------------------------------

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AC_ARG_WITH([rtai-dir],

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    AC_HELP_STRING(

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        [--with-rtai-dir=<DIR>],

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        [RTAI path (only for RTAI examples)]

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    ),

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    [

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        rtaidir=[$withval]

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    ],

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    [

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        rtaidir=""

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    ]

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)

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AC_MSG_CHECKING([for RTAI path])

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

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    AC_MSG_RESULT([not specified.])

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else

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    if test \! -r ${rtaidir}/include/rtai.h; then

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        AC_MSG_ERROR([no RTAI installation found in ${rtaidir}!])

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    fi

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    AC_MSG_RESULT([$rtaidir])

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    AC_SUBST(RTAI_DIR,[$rtaidir])

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fi

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#------------------------------------------------------------------------------

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# MSR path (optional)

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#------------------------------------------------------------------------------

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AC_ARG_WITH([msr-dir],

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    AC_HELP_STRING(

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        [--with-msr-dir=<DIR>],

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        [MSR path (only for MSR example)]

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    ),

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    [

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        msrdir=[$withval]

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    ],

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    [

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        msrdir=""

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    ]

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)

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AC_MSG_CHECKING([for MSR path])

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

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    AC_MSG_RESULT([not specified.])

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else

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    if test \! -r ${msrdir}/include/msr.h; then

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        AC_MSG_ERROR([no MSR installation found in ${msrdir}!])

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    fi

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    AC_MSG_RESULT([$msrdir])

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    AC_SUBST(MSR_DIR,[$msrdir])

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fi

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#------------------------------------------------------------------------------

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# Debug interface

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#------------------------------------------------------------------------------

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AC_ARG_ENABLE([dbg-if],

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    AS_HELP_STRING([--enable-dbg-if],

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                   [Create a debug interface for each master @<:@NO@:>@]),

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    [

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        case "${enableval}" in

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            yes) dbg=1

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                AC_DEFINE([EC_DBG_IF], [1], [Debug interfaces enabled])

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                ;;

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            no) dbg=0

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                ;;

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            *) AC_MSG_ERROR([Invalid value for --enable-dbg-if])

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                ;;

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        esac

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    ],

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    [dbg=0]

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)

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AM_CONDITIONAL(EC_DBG_IF, test "x$dbg" = x1)

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AC_SUBST([EC_DBG_IF],${dbg})

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#------------------------------------------------------------------------------

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# Create config.kbuild

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echo configure: creating config.kbuild...

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cat > config.kbuild <<EOF

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# config.kbuild - created by configure

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EC_DBG_IF := ${dbg}

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EC_8139TOO_KERNEL := ${kernel8139too}

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EC_RTAI_DIR := "${rtaidir}"

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EC_MSR_DIR := "${msrdir}"

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EOF

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#------------------------------------------------------------------------------

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AC_CONFIG_FILES([

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        Makefile

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        master/Makefile

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        devices/Makefile

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        script/Makefile

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        include/Makefile

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        examples/Makefile

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        examples/mini/Makefile

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        examples/rtai/Makefile

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        examples/msr/Makefile

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])

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AC_OUTPUT

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#------------------------------------------------------------------------------