mkvtoolnix/ac/ax_boost_base.m4

# ===========================================================================
#             http://autoconf-archive.cryp.to/ax_boost_base.html
# ===========================================================================
#
# SYNOPSIS
#
#   AX_BOOST_BASE([MINIMUM-VERSION])
#
# 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://randspringer.de/boost/index.html>.
#
#   This macro calls:
#
#     AC_SUBST(BOOST_CPPFLAGS) / AC_SUBST(BOOST_LDFLAGS)
#
#   And sets:
#
#     HAVE_BOOST
#
# LAST MODIFICATION
#
#   2008-04-12
#
# COPYLEFT
#
#   Copyright (c) 2008 Thomas Porschberg <thomas@randspringer.de>
#
#   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.

AC_DEFUN([AX_BOOST_BASE],
[

    AC_ARG_WITH([boost],
        AS_HELP_STRING([--with-boost=DIR], [specify the root directory for the mandatory Boost library (default is autodetection)]),
        [
        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 overwrite 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
        AC_MSG_ERROR(The Boost library is required for building MKVToolNix)
    fi

    boost_lib_version_req=ifelse([$1], ,1.32.0,$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 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
        case $target in
             powerpc64*|ppc64*|sparc64*|x86_64*) BOOST_LDFLAGS="-L$ac_boost_path/lib64" ;;
             *)                       BOOST_LDFLAGS="-L$ac_boost_path/lib" ;;
        esac
        BOOST_CPPFLAGS="-I$ac_boost_path/include"
    else
        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
                case $target in
                     powerpc64*|ppc64*|sparc64*|x86_64*) BOOST_LDFLAGS="-L$ac_boost_path_tmp/lib64" ;;
                     *)                       BOOST_LDFLAGS="-L$ac_boost_path_tmp/lib" ;;
                esac
                BOOST_CPPFLAGS="-I$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_LANG_PUSH(C++)
        AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
    @%:@include <boost/version.hpp>
    ]], [[
    #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-$VERSION_UNDERSCORE"
                done
            fi
        else
            for ac_boost_path in /usr /usr/local /opt /opt/local ; do
                if test -d "$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
                case $target in
                     powerpc64*|ppc64*|sparc64*|x86_64*) BOOST_LDFLAGS="-L$best_path/lib64" ;;
                     *)                       BOOST_LDFLAGS="-L$best_path/lib" ;;
                esac
            fi

                if test "x$BOOST_ROOT" != "x"; then
                if test -d "$BOOST_ROOT" && test -r "$BOOST_ROOT" && test -d "$BOOST_ROOT/stage/lib" && test -r "$BOOST_ROOT/stage/lib"; then
                    version_dir=`expr //$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/lib"
                    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>
        ]], [[
        #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_ERROR([[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.]])
        else
            AC_MSG_NOTICE([Your boost libraries seem to be too old (version $_version).])
        fi
    else
        AC_SUBST(BOOST_CPPFLAGS)
        AC_SUBST(BOOST_LDFLAGS)
        AC_DEFINE(HAVE_BOOST,,[define if the Boost library is available])
    fi

    CPPFLAGS="$CPPFLAGS_SAVED"
    LDFLAGS="$LDFLAGS_SAVED"

])