if ! $(gPYTHON_INCLUDED)
{
gPYTHON_INCLUDED = true ;

import testing ;
    
# Do some OS-specific setup
if $(NT)
{
    CATENATE = type ;
}
else if $(UNIX)
{
    CATENATE = cat ;
}

PYTHON_VERSION ?= 2.4 ;

# Strip the dot from the Python version in order to be able to name
# libraries
PYTHON_VERSION_NODOT
 = [ MATCH ([0-9]*)\.([0-9]*) : $(PYTHON_VERSION) ]
      ;
PYTHON_VERSION_NODOT = $(PYTHON_VERSION_NODOT:J=) ;

local RUN_PATH = $(RUN_PATH) ;

if $(NT) || ( $(UNIX) && $(OS) = CYGWIN )
{
    PYTHON_WINDOWS = true ;
}

if $(PYTHON_WINDOWS)
{
    # common properties required for compiling any Python module.
    PYTHON_PROPERTIES =
      boost-python-disable-borland
      select-nt-python-includes
      <runtime-link>dynamic
      <sysinclude>@boost
      <$(gcc-compilers)><*><define>USE_DL_IMPORT
      ;
    
    CYGWIN_PYTHON_ROOT ?= /usr ;
    if ! $(NT)
    {
        PYTHON_ROOT ?= $(CYGWIN_PYTHON_ROOT) ;
    }
    
    if $(CYGWIN_PYTHON_ROOT) = /usr
    {
        CYGWIN_PYTHON_DLL_PATH ?= /bin ;
    }
    else
    {
        CYGWIN_PYTHON_DLL_PATH ?= $(CYGWIN_PYTHON_ROOT)/bin ;
    }
    CYGWIN_PYTHON_VERSION ?= $(PYTHON_VERSION) ;
    CYGWIN_PYTHON_LIB_PATH ?= $(CYGWIN_PYTHON_ROOT)/lib/python$(CYGWIN_PYTHON_VERSION)/config ;
      
    CYGWIN_PYTHON_DEBUG_VERSION ?= $(CYGWIN_PYTHON_VERSION) ;
    CYGWIN_PYTHON_DEBUG_ROOT ?= $(PYTHON_ROOT) ;
    CYGWIN_PYTHON_DEBUG_DLL_PATH ?= $(CYGWIN_PYTHON_DEBUG_ROOT)/bin ;
    CYGWIN_PYTHON_DEBUG_LIB_PATH ?= $(CYGWIN_PYTHON_DEBUG_ROOT)/lib/python$(CYGWIN_PYTHON_DEBUG_VERSION)/config ;
}
else if $(UNIX)
{
	# PYTHON_EMBEDDED_LIBRARY: Libraries to include when
	# embedding Python in C++ code.  We need the Python library,
	# libdl for dynamic loading and possibly libutil on BSD-like
	# systems (including Linux).  A dynamic libpython should
	# automatically pick up the libutil dependency, but we cannot
	# tell here if we are linking with a static or dynamic
	# libpython, so we include libutil for all UNIX systems where
	# it is available.

	if $(OS) = MACOSX
	{
		PYTHON_EMBEDDED_LIBRARY = ;
	}
	else if $(OS) = SOLARIS
	{
		PYTHON_EMBEDDED_LIBRARY = python$(PYTHON_VERSION) dl ;
	}
	else if $(OS) = OSF
	{
		PYTHON_EMBEDDED_LIBRARY = python$(PYTHON_VERSION) ;
	}
	else
	{
		PYTHON_EMBEDDED_LIBRARY = python$(PYTHON_VERSION) dl util ;
	}
}


if $(NT)
{
    PYTHON_ROOT ?= c:/Python$(PYTHON_VERSION_NODOT) ;
    
    # Reconstitute any paths split due to embedded spaces.
    PYTHON_ROOT = $(PYTHON_ROOT:J=" ") ;
    
    PYTHON_LIB_PATH ?= $(PYTHON_ROOT)/libs [ GLOB $(PYTHON_ROOT) : PCbuild ] ;

    PYTHON_INCLUDES ?= $(PYTHON_ROOT)/include ;
    
    PYTHON_DLL ?= [ GLOB $(PYTHON_ROOT) $(PATH) $(Path) : python$(PYTHON_VERSION_NODOT).dll ] ;
    PYTHON_DEBUG_DLL ?= [ GLOB $(PYTHON_ROOT) $(PATH) $(Path) : python$(PYTHON_VERSION_NODOT)_d.dll ] ;
    PYTHON_IMPORT_LIB ?= [ GLOB $(PYTHON_LIB_PATH) : libpython$(PYTHON_VERSION_NODOT).* ] ;
    PYTHON_DEBUG_IMPORT_LIB ?= [ GLOB $(PYTHON_LIB_PATH) : libpython$(PYTHON_VERSION_NODOT).* ] ;
}
else if $(UNIX) && $(OS) = MACOSX
{
    if ! $(PYTHON_ROOT)
    {
        if [ GLOB /System/Library/Frameworks : Python.framework ]
        {
            PYTHON_ROOT ?= /System/Library/Frameworks/Python.framework/Versions/$(PYTHON_VERSION) ;
        }
        else
        {
            PYTHON_ROOT ?= /Library/Frameworks/Python.framework/Versions/$(PYTHON_VERSION) ;
        }
    }
    PYTHON_ROOT = $(PYTHON_ROOT:J=" ") ;
    PYTHON_INCLUDES ?= $(PYTHON_ROOT)/include/python$(PYTHON_VERSION) ;
    PYTHON_FRAMEWORK ?= $(PYTHON_ROOT) ;
    while $(PYTHON_FRAMEWORK:D=) && $(PYTHON_FRAMEWORK:D=) != Python.framework
    {
        PYTHON_FRAMEWORK = $(PYTHON_FRAMEWORK:D) ;
    }
    PYTHON_FRAMEWORK = $(PYTHON_FRAMEWORK:D)/Python ;

    PYTHON_PROPERTIES ?=
      <sysinclude>$(PYTHON_INCLUDES)
      ;
}
else if $(UNIX)
{
    PYTHON_ROOT ?= /usr ;
    PYTHON_ROOT = $(PYTHON_ROOT:J=" ") ;
    PYTHON_INCLUDES ?= $(PYTHON_ROOT)/include/python$(PYTHON_VERSION) ;
    PYTHON_LIB_PATH ?= $(PYTHON_ROOT)/lib/python$(PYTHON_VERSION)/config ;

    PYTHON_PROPERTIES ?=
      <sysinclude>$(PYTHON_INCLUDES)
        <library-path>$(PYTHON_LIB_PATH)
          <default>python-intel-use-gcc-stdlib
          python-static-multithread
      ;
    
    if $(OS) = OSF
    {
        local not-gcc-compilers = [ difference $(TOOLS) : $(gcc-compilers) ] ;

        PYTHON_PROPERTIES +=
          <$(not-gcc-compilers)><*><linkflags>"-expect_unresolved 'Py*' -expect_unresolved '_Py*'"
          <$(gcc-compilers)><*><linkflags>"-Xlinker -expect_unresolved -Xlinker 'Py*' -Xlinker -expect_unresolved -Xlinker '_Py*'" ;
    }
    else if $(OS) = AIX
    {
        PYTHON_PROPERTIES 
          += <*><*><linkflags>"-Wl,-bI:$(PYTHON_LIB_PATH)/python.exp"
            <*><*><find-library>pthreads ;
    }
}

#
# Locate the python executable(s)
#
CYGWIN_ROOT ?= c:/cygwin ;
{
    for local cyg in "" CYGWIN_
    {
        for local d in "" _D
        {
            local d_D = _DEBUG ;
            local debug = $(d$(d)) ; # "" or _DEBUG

            # select base name of variables
            local var-base = $(cyg)PYTHON$(debug) ; 
            
            # Base defaults for the debug build on the non-debug
            $(var-base)_VERSION ?= $($(cyg)PYTHON_VERSION) ;
            $(var-base)_ROOT ?= $($(cyg)PYTHON_ROOT) ;
            
            # Version number element of executable name
            local exe-version = $($(var-base)_VERSION) ;
            if $(NT) && ! $(cyg) { exe-version = $(d:L) ; }
            
            # assign default target name
            local executable = $(cyg)PYTHON$(d) ;
            $(executable) ?= <$(cyg)EXE$(d)@>python$(exe-version)$(SUFEXE) ;

            # choose the appropriate root directory/ies to search for the target
            local r = $($(var-base)_ROOT) ;
            if $(NT)
            {
                switch $(r)
                {
                    case [/\\]* : # in case of unix-style path
                      r = $(CYGWIN_ROOT)$(r) $(r) ; # re-root for windows
                }
            }
            
            # set up search path
            SEARCH on $($(executable))
              = $(r)/bin           # Standard locations
                $(r)               # Standard locations
                $(r)/PCBuild       # In case building from a windows development Python
                $(RUN_PATH)        # Just look in the path
                ;
        }
    }
}

# Normally on Linux, Python is built with GCC.  A "poor QOI choice" in
# the implementation of the intel tools prevents the use of
# intel-linked shared libs by a GCC-built executable unless they have
# been told to use the GCC runtime.  This rule adds the requisite
# flags to the compile and link lines.
rule python-intel-use-gcc-stdlib ( toolset variant : non-defaults * )
{
    if ( ! $(PYTHON_WINDOWS) )
      && ( ! <define>BOOST_PYTHON_STATIC_LIB in $(non-defaults) )
          && [ MATCH (intel) : $(toolset) ]
    {
        return <stdlib>gcc ;
    }
    else
    {
        return ;
    }
}

# Force statically-linked embedding applications to be multithreaded
# on UNIX.
rule python-static-multithread ( toolset variant : properties * )
{
    if ! $(PYTHON_WINDOWS)
    {
        local x = <define>BOOST_PYTHON_STATIC_LIB <threading>single ;
        if $(x) in $(properties)
        {
            properties = [ difference $(properties) : <threading>single ] <threading>multi ;
        }
    }
    return $(properties) ;
}

# Borland compilers are not supported
rule boost-python-disable-borland ( toolset variant : properties * )
{
    if [ MATCH .*(bcc|borland).* : $(toolset) ]
    {
        properties += <build>no ;
    }
    return $(properties) ;
}

# select-python-library
#
# Ungristed elements of a requirements list are treated as the rule
# names to be called to transform the property set. This is used when
# the requirements are too complicated to express otherwise.  This
# rule selects the right python library when building on Windows.
rule select-python-library ( toolset variant : properties * )
{
    if $(PYTHON_WINDOWS) 
    {
        if $(toolset) in $(gcc-compilers)
        {
            if <define>BOOST_DEBUG_PYTHON in $(properties)
            {
                properties += <library-path>$(CYGWIN_PYTHON_DEBUG_LIB_PATH) <find-library>python$(CYGWIN_PYTHON_DEBUG_VERSION).dll ;
            }
            else
            {
                properties += <library-path>$(CYGWIN_PYTHON_LIB_PATH) <find-library>python$(CYGWIN_PYTHON_VERSION).dll ;
            }
        }
        else if [ MATCH .*(mingw).* : $(toolset) ]
        {
            local lib = $(PYTHON_IMPORT_LIB) ;
            if <define>BOOST_DEBUG_PYTHON in $(properties)
            {
                lib = $(PYTHON_DEBUG_IMPORT_LIB) ;
            }
            lib ?= $(PYTHON_DLL) ;
            if <define>BOOST_DEBUG_PYTHON in $(properties)
            {
                lib ?= $(PYTHON_DEBUG_DLL) ;
            }
            properties += <library-file>$(lib) ;
        }
        else 
        {
            properties += <library-path>$(PYTHON_LIB_PATH) ;
            
            if $(toolset) != msvc  # msvc compilers auto-find the python library
            {
                properties += <library-path>$(PYTHON_LIB_PATH) ;
                
                local lib = python$(PYTHON_VERSION_NODOT) ;
                if <define>BOOST_DEBUG_PYTHON in $(properties)
                {
                    lib = python$(PYTHON_VERSION_NODOT)_d ;
                }
                properties += <find-library>$(lib) ;
            } 
        }
    }
    if $(OS) = MACOSX && [ MATCH .*(darwin).* : $(toolset) ]
    {
        if <target-type>PYD in $(properties)