# ===========================================================================

#       http://www.gnu.org/software/autoconf-archive/ax_boost_base.html

# ===========================================================================

#

# SYNOPSIS

#

#   AX_BOOST_BASE([MINIMUM-VERSION], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])

#

# DESCRIPTION

#

#   Test for the Boost C++ libraries of a particular version (or newer)

#

#   If no path to the installed boost library is given the macro searchs

#   under /usr, /usr/local, /opt and /opt/local and evaluates the

#   $BOOST_ROOT environment variable. Further documentation is available at

#   <http: boost="" index.html="" randspringer.de="">.</http:>

#

#   This macro calls:

#

#     AC_SUBST(BOOST_CPPFLAGS) / AC_SUBST(BOOST_LDFLAGS)

#

#   And sets:

#

#     HAVE_BOOST

#

# LICENSE

#

#   Copyright (c) 2008 Thomas Porschberg <thomas@randspringer.de></thomas@randspringer.de>

#   Copyright (c) 2009 Peter Adolphs

#

#   Copying and distribution of this file, with or without modification, are

#   permitted in any medium without royalty provided the copyright notice

#   and this notice are preserved. This file is offered as-is, without any

#   warranty.

#serial 21

AC_DEFUN([AX_BOOST_BASE],

[

AC_ARG_WITH([boost],

  [AS_HELP_STRING([--with-boost@<:@=ARG@:>@],

    [use Boost library from a standard location (ARG=yes),

     from the specified location (ARG=<path>),</path>

     or disable it (ARG=no)

     @<:@ARG=yes@:>@ ])],

    [

    if test "$withval" = "no"; then

        want_boost="no"

    elif test "$withval" = "yes"; then

        want_boost="yes"

        ac_boost_path=""

    else

        want_boost="yes"

        ac_boost_path="$withval"

    fi

    ],

    [want_boost="yes"])

AC_ARG_WITH([boost-libdir],

        AS_HELP_STRING([--with-boost-libdir=LIB_DIR],

        [Force given directory for boost libraries. Note that this will override library path detection, so use this parameter only if default library detection fails and you know exactly where your boost libraries are located.]),

        [

        if test -d "$withval"

        then

                ac_boost_lib_path="$withval"

        else

                AC_MSG_ERROR(--with-boost-libdir expected directory name)

        fi

        ],

        [ac_boost_lib_path=""]

)

if test "x$want_boost" = "xyes"; then

    boost_lib_version_req=ifelse([$1], ,1.20.0,$1)

    boost_lib_version_req_shorten=`expr $boost_lib_version_req : '\([[0-9]]*\.[[0-9]]*\)'`

    boost_lib_version_req_major=`expr $boost_lib_version_req : '\([[0-9]]*\)'`

    boost_lib_version_req_minor=`expr $boost_lib_version_req : '[[0-9]]*\.\([[0-9]]*\)'`

    boost_lib_version_req_sub_minor=`expr $boost_lib_version_req : '[[0-9]]*\.[[0-9]]*\.\([[0-9]]*\)'`

    if test "x$boost_lib_version_req_sub_minor" = "x" ; then

        boost_lib_version_req_sub_minor="0"

        fi

    WANT_BOOST_VERSION=`expr $boost_lib_version_req_major \* 100000 \+  $boost_lib_version_req_minor \* 100 \+ $boost_lib_version_req_sub_minor`

    AC_MSG_CHECKING(for boostlib >= $boost_lib_version_req)

    succeeded=no

    dnl On 64-bit systems check for system libraries in both lib64 and lib.

    dnl The former is specified by FHS, but e.g. Debian does not adhere to

    dnl this (as it rises problems for generic multi-arch support).

    dnl The last entry in the list is chosen by default when no libraries

    dnl are found, e.g. when only header-only libraries are installed!

    libsubdirs="lib"

    ax_arch=`uname -m`

    case $ax_arch in

      x86_64|ppc64|s390x|sparc64|aarch64)

        libsubdirs="lib64 lib lib64"

        ;;

    esac

    dnl first we check the system location for boost libraries

    dnl this location ist chosen if boost libraries are installed with the --layout=system option

    dnl or if you install boost with RPM

    if test "$ac_boost_path" != ""; then

        BOOST_CPPFLAGS="-I$ac_boost_path/include"

        for ac_boost_path_tmp in $libsubdirs; do

                if test -d "$ac_boost_path"/"$ac_boost_path_tmp" ; then

                        BOOST_LDFLAGS="-L$ac_boost_path/$ac_boost_path_tmp"

                        break

                fi

        done

    elif test "$cross_compiling" != yes; then

        for ac_boost_path_tmp in /usr /usr/local /opt /opt/local ; do

            if test -d "$ac_boost_path_tmp/include/boost" && test -r "$ac_boost_path_tmp/include/boost"; then

                for libsubdir in $libsubdirs ; do

                    if ls "$ac_boost_path_tmp/$libsubdir/libboost_"* >/dev/null 2>&1 ; then break; fi

                done

                BOOST_LDFLAGS="-L$ac_boost_path_tmp/$libsubdir"

                BOOST_CPPFLAGS="-I$ac_boost_path_tmp/include"

                break;

            fi

        done

    fi

    dnl overwrite ld flags if we have required special directory with

    dnl --with-boost-libdir parameter

    if test "$ac_boost_lib_path" != ""; then

       BOOST_LDFLAGS="-L$ac_boost_lib_path"

    fi

    CPPFLAGS_SAVED="$CPPFLAGS"

    CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"

    export CPPFLAGS

    LDFLAGS_SAVED="$LDFLAGS"

    LDFLAGS="$LDFLAGS $BOOST_LDFLAGS"

    export LDFLAGS

    AC_REQUIRE([AC_PROG_CXX])

    AC_LANG_PUSH(C++)

        AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[

    @%:@include <boost version.hpp=""></boost>

    ]], [[

    #if BOOST_VERSION >= $WANT_BOOST_VERSION

    // Everything is okay

    #else

    #  error Boost version is too old

    #endif

    ]])],[

        AC_MSG_RESULT(yes)

    succeeded=yes

    found_system=yes

        ],[

        ])

    AC_LANG_POP([C++])

    dnl if we found no boost with system layout we search for boost libraries

    dnl built and installed without the --layout=system option or for a staged(not installed) version

    if test "x$succeeded" != "xyes"; then

        _version=0

        if test "$ac_boost_path" != ""; then

            if test -d "$ac_boost_path" && test -r "$ac_boost_path"; then

                for i in `ls -d $ac_boost_path/include/boost-* 2>/dev/null`; do

                    _version_tmp=`echo $i | sed "s#$ac_boost_path##" | sed 's/\/include\/boost-//' | sed 's/_/./'`

                    V_CHECK=`expr $_version_tmp \> $_version`

                    if test "$V_CHECK" = "1" ; then

                        _version=$_version_tmp

                    fi

                    VERSION_UNDERSCORE=`echo $_version | sed 's/\./_/'`

                    BOOST_CPPFLAGS="-I$ac_boost_path/include/boost-$VERSION_UNDERSCORE"

                done

            fi

        else

            if test "$cross_compiling" != yes; then

                for ac_boost_path in /usr /usr/local /opt /opt/local ; do

                    if test -d "$ac_boost_path" && test -r "$ac_boost_path"; then

                        for i in `ls -d $ac_boost_path/include/boost-* 2>/dev/null`; do

                            _version_tmp=`echo $i | sed "s#$ac_boost_path##" | sed 's/\/include\/boost-//' | sed 's/_/./'`

                            V_CHECK=`expr $_version_tmp \> $_version`

                            if test "$V_CHECK" = "1" ; then

                                _version=$_version_tmp

                                best_path=$ac_boost_path

                            fi

                        done

                    fi

                done

                VERSION_UNDERSCORE=`echo $_version | sed 's/\./_/'`

                BOOST_CPPFLAGS="-I$best_path/include/boost-$VERSION_UNDERSCORE"

                if test "$ac_boost_lib_path" = ""; then

                    for libsubdir in $libsubdirs ; do

                        if ls "$best_path/$libsubdir/libboost_"* >/dev/null 2>&1 ; then break; fi

                    done

                    BOOST_LDFLAGS="-L$best_path/$libsubdir"

                fi

            fi

            if test "x$BOOST_ROOT" != "x"; then

                for libsubdir in $libsubdirs ; do

                    if ls "$BOOST_ROOT/stage/$libsubdir/libboost_"* >/dev/null 2>&1 ; then break; fi

                done

                if test -d "$BOOST_ROOT" && test -r "$BOOST_ROOT" && test -d "$BOOST_ROOT/stage/$libsubdir" && test -r "$BOOST_ROOT/stage/$libsubdir"; then

                    version_dir=`expr //$BOOST_ROOT : '.*/\(.*\)'`

                    stage_version=`echo $version_dir | sed 's/boost_//' | sed 's/_/./g'`

                        stage_version_shorten=`expr $stage_version : '\([[0-9]]*\.[[0-9]]*\)'`

                    V_CHECK=`expr $stage_version_shorten \>\= $_version`

                    if test "$V_CHECK" = "1" -a "$ac_boost_lib_path" = "" ; then

                        AC_MSG_NOTICE(We will use a staged boost library from $BOOST_ROOT)

                        BOOST_CPPFLAGS="-I$BOOST_ROOT"

                        BOOST_LDFLAGS="-L$BOOST_ROOT/stage/$libsubdir"

                    fi

                fi

            fi

        fi

        CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"

        export CPPFLAGS

        LDFLAGS="$LDFLAGS $BOOST_LDFLAGS"

        export LDFLAGS

        AC_LANG_PUSH(C++)

            AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[

        @%:@include <boost version.hpp=""></boost>

        ]], [[

        #if BOOST_VERSION >= $WANT_BOOST_VERSION

        // Everything is okay

        #else

        #  error Boost version is too old

        #endif

        ]])],[

            AC_MSG_RESULT(yes)

        succeeded=yes

        found_system=yes

            ],[

            ])

        AC_LANG_POP([C++])

    fi

    if test "$succeeded" != "yes" ; then

        if test "$_version" = "0" ; then

            AC_MSG_NOTICE([[We could not detect the boost libraries (version $boost_lib_version_req_shorten or higher). If you have a staged boost library (still not installed) please specify \$BOOST_ROOT in your environment and do not give a PATH to --with-boost option.  If you are sure you have boost installed, then check your version number looking in <boost version.hpp="">. See http://randspringer.de/boost for more documentation.]])</boost>

        else

            AC_MSG_NOTICE([Your boost libraries seems to old (version $_version).])

        fi

        # execute ACTION-IF-NOT-FOUND (if present):

        ifelse([$3], , :, [$3])

    else

        AC_SUBST(BOOST_CPPFLAGS)

        AC_SUBST(BOOST_LDFLAGS)

        AC_DEFINE(HAVE_BOOST,,[define if the Boost library is available])

        # execute ACTION-IF-FOUND (if present):

        ifelse([$2], , :, [$2])

    fi

    CPPFLAGS="$CPPFLAGS_SAVED"

    LDFLAGS="$LDFLAGS_SAVED"

fi

])