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C++的一个好库。。。现在很流行

# Boost.Signals Library 

# Copyright Douglas Gregor 2001-2003. Use, modification and
# distribution is subject to the Boost Software License, Version
# 1.0. (See accompanying file LICENSE_1_0.txt or copy at
# http://www.boost.org/LICENSE_1_0.txt)

# For more information, see http://www.boost.org

# declare the location of this subproject relative to the root
subproject libs/signals/build ;

#
# this template defines the options common to
# all signals builds and tests:
#
template signals-options
   : # sources
   : # requirements
     <define>BOOST_SIGNALS_NO_LIB=1        
     <sysinclude>$(BOOST_ROOT)
   ;

#
# this template defines the options common to
# all signals dll builds and tests:
#
template signals-dll-options
   : <template>signals-options # sources
   : # requirements
     <define>BOOST_SIGNALS_DYN_LINK=1      
     <runtime-link>dynamic
   ;

SOURCES = trackable connection named_slot_map signal_base slot ;
       
lib boost_signals : ../src/$(SOURCES).cpp <template>signals-options
    :
        [ common-names ]
    : 
        debug release
    ;


dll boost_signals : ../src/$(SOURCES).cpp <template>signals-dll-options
    : 
       [ common-names ]
    : 
        debug release
    ;
    
stage stage/lib : <lib>boost_signals <dll>boost_signals
    :
        <locate>$(BOOST_ROOT)
        [ common-names ]
        <target>stage
        <target>all
    :
        debug release
    ;

install signals lib
    : <dll>boost_signals <lib>boost_signals
    ;