Re: [boost] m4 macro for boost?

From: Thomas Porschberg (thomas.porschberg_at_[hidden])
Date: 2006-01-02 09:21:06

Hi,
I updated the macro. If a path to --with-boost is given I assume
there is a installed boost version.
E.g. --with-boost=/usr/local means I can find 
include files under /usr/local/include/boost-*
and the libs in /usr/local/lib.
If multiple boost-installations are found I take the newest one.
If no path was specified I look in /usr /usr/local and /opt 
and assume an installed boost library (and no staged one).
As a last resort I evaluate $BOOST_ROOT. 
Any further thoughts ?

AC_DEFUN([AX_PATH_BOOST], [
        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
        
        AC_MSG_CHECKING(for boostlib >= $boost_lib_version_req)
        succeeded=no

        AC_ARG_WITH(boost, [  --with-boost=DIR root directory for boost library ], 
[
                if test "$withval" = "no"; then	
                        AC_MSG_ERROR('You specified --with-boost=no. 
                   Sorry we need boost. Please download from http://boost.org.')
                elif test "$withval" = "yes"; then
                        ac_boost_path=""
                else
                        ac_boost_path="$withval"
                fi
        ],[ac_boost_path=""])

        _version=0	
        if test "$ac_boost_path" != ""; then	
                BOOST_LDFLAGS="-L$ac_boost_path/lib"	
                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-
$VERSION_UNDERSCORE"
                        done
                fi
        else
                for ac_boost_path in /usr /usr/local/ /opt ; do
                        if test -d "$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-$VERSION_UNDERSCORE"
                BOOST_LDFLAGS="-L$best_path/lib"

            if test "x$BOOST_ROOT" != "x"; then
                        if test -d "$BOOST_ROOT" && test -r "$BOOST_ROOT"; then
                                version_dir=`expr //$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" ; 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

        AC_SUBST(BOOST_CPPFLAGS)	
        AC_SUBST(BOOST_LDFLAGS)		

        CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"
        export CPPFLAGS
        LDFLAGS="$LDFLAGS $BOOST_LDFLAGS"
        export LDFLAGS

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

     AC_TRY_COMPILE(
       [
#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 ($_version))
                 succeeded=yes	
         ifelse([$2], , :, [$2])
       ],
       [
         AC_MSG_RESULT(no ($_version))
         ifelse([$3], , :, [$3])
       ])

        if test "$VERSION_CHECK" = "1" ; then
                succeeded=yes
        fi

        if test "$succeeded" != "yes" ; then
                if test "$_version" = "0" ; then
                        AC_MSG_ERROR('We did not find a directory include/boost-
<version> 
                   under $ac_boost_path. 
                   This means we could not detect the boost libraries.
                   Sorry we need boost. Please download from http://boost.org.
                   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')
                else
                        AC_MSG_ERROR('Your boost libraries seems to old (version 
$_version). 
                   We need at least $boost_lib_version_shorten')	
                fi
        fi

        
])