Boost C++ Libraries

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This is the documentation for an old version of boost. Click here for the latest Boost documentation.

tools/build/v1/allyourbase.jam

#
# /+\
# +\    Copyright 1993, 2000 Christopher Seiwald.
# \+/
#
# This file is part of Jam - see jam.c for Copyright information.
#

# This file is ALSO:
# (C) Copyright David Abrahams 2001.
# Distributed under the Boost Software License, Version 1.0.
# (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)

#
# JAMBASE - jam 2.3 ruleset providing make(1)-like functionality
#
# Supports UNIX, NT, and VMS.
#
# 12/27/93 (seiwald) - purturb library sources with SOURCE_GRIST
# 04/18/94 (seiwald) - use '?=' when setting OS specific vars
# 04/21/94 (seiwald) - do RmTemps together
# 05/05/94 (seiwald) - all supported C compilers support -o: relegate
#                      RELOCATE as an option; set Ranlib to "" to disable it
# 06/01/94 (seiwald) - new 'actions existing' to do existing sources
# 08/25/94 (seiwald) - new ObjectCcFlags rule to append to per-target CCFLAGS
# 08/29/94 (seiwald) - new ObjectHdrs rule to append to per-target HDRS
# 09/19/94 (seiwald) - LinkLibraries and Undefs now append
#                    - Rule names downshifted.
# 10/06/94 (seiwald) - Dumb yyacc stuff moved into Jamfile.
# 10/14/94 (seiwald) - (Crude) support for .s, .C, .cc, .cpp, and .f files.
# 01/08/95 (seiwald) - Shell now handled with awk, not sed
# 01/09/95 (seiwald) - Install* now take dest directory as target
# 01/10/95 (seiwald) - All entries sorted.
# 01/10/95 (seiwald) - NT support moved in, with LauraW's help.  
# 01/10/95 (seiwald) - VMS support moved in.
# 02/06/95 (seiwald) - ObjectC++Flags and SubDirC++Flags added.
# 02/07/95 (seiwald) - Iron out when HDRSEARCH uses "" or SEARCH_SOURCE.
# 02/08/95 (seiwald) - SubDir works on VMS.
# 02/14/95 (seiwald) - MkDir and entourage.
# 04/30/95 (seiwald) - Use install -c flag so that it copies, not moves.
# 07/10/95 (taylor) - Support for Microsoft C++.
# 11/21/96 (peterk) - Support for BeOS
# 07/19/99 (sickel) - Support for Mac OS X Server (and maybe client)
# 02/18/00 (belmonte)- Support for Cygwin.

# Special targets defined in this file:
#
# all           - parent of first, shell, files, lib, exe
# first         - first dependent of 'all', for potential initialization
# shell         - parent of all Shell targets 
# files         - parent of all File targets
# lib           - parent of all Library targets
# exe           - parent of all Main targets
# dirs          - parent of all MkDir targets
# clean         - removes all Shell, File, Library, and Main targets
# uninstall     - removes all Install targets
#       

# Rules defined by this file:
#
# as obj.o : source.s ;                 .s -> .o
# Bulk dir : files ;                    populate directory with many files
# Cc obj.o : source.c ;                 .c -> .o
# C++ obj.o : source.cc ;               .cc -> .o
# Clean clean : sources ;               remove sources with 'jam clean'
# File dest : source ;                  copy file
# Fortran obj.o : source.f ;            .f -> .o
# GenFile source.c : program args ;     make custom file
# Hardlink target : source ;            make link from source to target
# HdrRule source : headers ;            handle #includes
# InstallInto dir : sources ;           install any files
# InstallBin dir : sources ;            install binaries
# InstallLib dir : sources ;            install files
# InstallFile dir : sources ;           install files
# InstallMan dir : sources ;            install man pages
# InstallShell dir : sources ;          install shell scripts
# Lex source.c : source.l ;             .l -> .c
# Library lib : source ;                archive library from compiled sources
# LibraryFromObjects lib : objects ;    archive library from objects
# LinkLibraries images : libraries ;    bag libraries onto Mains
# Main image : source ;                 link executable from compiled sources
# MainFromObjects image : objects ;     link executable from objects
# MkDir dir ;                           make a directory, if not there
# Object object : source ;              compile object from source
# ObjectCcFlags source : flags ;        add compiler flags for object
# ObjectC++Flags source : flags ;       add compiler flags for object
# ObjectHdrs source : dirs ;            add include directories for object
# Objects sources ;                     compile sources
# RmTemps target : sources ;            remove temp sources after target made
# Setuid images ;                       mark executables Setuid
# SubDir TOP d1 d2 ... ;                start a subdirectory Jamfile
# SubDirCcFlags flags ;                 add compiler flags until next SubDir
# SubDirC++Flags flags ;                add compiler flags until next SubDir
# SubDirHdrs dirs ;                     add include dirs until next SubDir
# SubInclude TOP d1 d2 ... ;            include a subdirectory Jamfile
# Shell exe : source ;                  make a shell executable
# Undefines images : symbols ;          save undef's for linking
# UserObject object : source ;          handle unknown suffixes for Object
# Yacc source.c : source.y ;            .y -> .c
#
# Utility rules that have no side effects (not supported):
#
# FAppendSuffix f1 f2 ... : $(SUF) ;    return $(<) with suffixes
# join value ... ;                   return contatenated values
# FDirName d1 d2 ... ;                  return path from root to dir
# FGrist d1 d2 ... ;                    return d1!d2!...
# FGristFiles value ;                   return $(value:G=$(SOURCE_GRIST))
# FGristSourceFiles value ;             return $(value:G=$(SOURCE_GRIST))
# FRelPath d1 : d2 ;                    return rel path from d1 to d2
# FSubDir d1 d2 ... ;                   return path to root
#


# Brief review of the jam language:
#
# Statements:
#       rule RULE - statements to process a rule
#       actions RULE - system commands to carry out target update
#
# Modifiers on actions:
#       together - multiple instances of same rule on target get executed
#                  once with their sources ($(>)) concatenated
#       updated - refers to updated sources ($(>)) only
#       ignore - ignore return status of command
#       quietly - don't trace its execution unless verbose
#       piecemeal - iterate command each time with a small subset of $(>)
#       existing - refers to currently existing sources ($(>)) only
#       bind vars - subject to binding before expanding in actions
#
# Special rules:
#       ALWAYS - always build a target
#       DEPENDS - builds the dependency graph
#       ECHO - blurt out targets on stdout
#       EXIT - blurt out targets and exit
#       INCLUDES - marks sources as headers for target (a codependency)
#       NOCARE - don't panic if the target can't be built
#       NOUPDATE - create the target if needed but never update it 
#       NOTFILE - ignore the timestamp of the target (it's not a file)
#       TEMPORARY - target need not be present if sources haven't changed
#
# Special variables set by jam:
#       $(<) - targets of a rule (to the left of the :)
#       $(>) - sources of a rule (to the right of the :)
#       $(xxx) - true on xxx (UNIX, VMS, NT, OS2, MAC)
#       $(OS) - name of OS - varies wildly
#       $(JAMVERSION) - version number (2.3)
#
# Special variables used by jam:
#       SEARCH - where to find something (used during binding and actions)
#       LOCATE - where to plop something not found with SEARCH
#       HDRRULE - rule to call to handle include files
#       HDRSCAN - egrep regex to extract include files
#
# Special targets:
#       all - default if none given on command line
#

# Initialize variables
#

#
# OS specific variable settings
#

# dwa 6/4/01 - removed all settings of the following variables for boost:
#   CC, CCFLAGS, C++, C++FLAGS, LINK, LINKFLAGS, LINKLIBS
# probably a lot more could be cleared away

if $(NT)
{
    CP              ?= copy ;
    RM              ?= del /f/q ;
    SLASH           ?= \\ ;
    SPLITPATH       ?= ";" ; # dwa -- added missing SPLITPATH
    SUFLIB          ?= .lib ;
    SUFOBJ          ?= .obj ;
    SUFEXE          ?= .exe ;
    SUFDLL          ?= .dll .lib ;
    gLINK_VARIABLE(.dll) = ;             # dlls are NOT linked to directly
    gLINK_VARIABLE(.lib) = NEEDLIBS ;    # instead, users link to import libs
    PREDLL          ?= "" ;
    NOARSCAN        ?= true ;
    SHELL_EXPORT    ?= ;
    SHELL_SET       ?= "set " ;
    
    # dwa 6/4/01 - removed compiler determination for boost
    # added some yacc/lex stuff, assuming cygwin for now.
    LEX             ?= flex ;
    YACC            ?= bison -y ;
    YACCFILES       ?= y.tab ;
    YACC_OUTPUT     ?= --output= ;
    LEX_OUTPUT      ?= -o ;
    
    LN              ?= $(CP) ;
    NULL_OUT        ?= >NUL: ;
}
else if $(OS2)
{
    WATCOM          ?= $(watcom) ;

    if ! $(WATCOM)
    {
        EXIT On OS2, set WATCOM to the root of the Watcom directory. ;
    }

    AR              ?= wlib ;
    BINDIR          ?= \\os2\\apps ;
    CP              ?= copy ;
    DOT             ?= . ;
    DOTDOT          ?= .. ;
    MV              ?= move ;
    NOARSCAN        ?= true ;
    OPTIM           ?= ;
    RM              ?= del /f ;
    SLASH           ?= \\ ;
    SPLITPATH       ?= ";" ; # dwa -- added missing SPLITPATH
    STDHDRS         ?= $(WATCOM)\\h ;
    SUFEXE          ?= .exe ;
    SUFLIB          ?= .lib ;
    SUFOBJ          ?= .obj ;
    UNDEFFLAG       ?= "/u _" ;

}
else if $(VMS)
{
    CHMOD           ?= set file/prot= ;
    CP              ?= copy/replace ;
    CRELIB          ?= true ;
    DOT             ?= [] ;
    DOTDOT          ?= [-] ;
    EXEMODE         ?= (w:e) ;
    FILEMODE        ?= (w:r) ;
    HDRS            ?= ;
    MKDIR           ?= create/dir ;
    MV              ?= rename ;
    OPTIM           ?= "" ;
    RM              ?= delete ;
    RUNVMS          ?= mcr ;
    SHELLMODE       ?= (w:er) ;
    SLASH           ?= . ;
    STDHDRS         ?= decc$library_include ;
    SUFEXE          ?= .exe ;
    SUFLIB          ?= .olb ;
    SUFOBJ          ?= .obj ;

    switch $(OS) 
    {
    case VMS     : LINKLIBS ?= sys$library:vaxcrtl.olb/lib ;
    }
}
else if $(MAC)
{
    local OPT ;

    CW      ?= "{CW}" ;

    MACHDRS ?=
            "$(UMACHDRS):Universal:Interfaces:CIncludes"
            "$(CW):MSL:MSL_C:MSL_Common:Include"
            "$(CW):MSL:MSL_C:MSL_MacOS:Include" ;

    MACLIBS ?=
            "$(CW):MacOS Support:Universal:Libraries:StubLibraries:Interfacelib"
            "$(CW):MacOS Support:Universal:Libraries:StubLibraries:Mathlib" ;

    MPWLIBS ?= 
            "$(CW):MacOS Support:Libraries:Runtime:Runtime PPC:MSL MPWCRuntime.lib"
            "$(CW):MSL:MSL_C:MSL_MacOS:Lib:PPC:MSL C.PPC MPW.Lib" ;

    MPWNLLIBS ?= 
            "$(CW):MacOS Support:Libraries:Runtime:Runtime PPC:MSL MPWCRuntime.lib"
            "$(CW):MSL:MSL_C:MSL_MacOS:Lib:PPC:MSL C.PPC MPW(NL).Lib" ;

    SIOUXHDRS ?= ;

    SIOUXLIBS ?= 
            "$(CW):MacOS Support:Libraries:Runtime:Runtime PPC:MSL RuntimePPC.lib"
            "$(CW):MSL:MSL_C:MSL_MacOS:Lib:PPC:MSL SIOUX.PPC.Lib" 
            "$(CW):MSL:MSL_C:MSL_MacOS:Lib:PPC:MSL C.PPC.Lib" ;

    CP              ?= duplicate -y ;
    DOT             ?= ":" ;
    DOTDOT          ?= "::" ;
    HDRS            ?= $(MACHDRS) $(MPWHDRS) ;
    MKDIR           ?= newfolder ;
    MV              ?= rename -y ;
    NOARSCAN        ?= true ;
    OPTIM           ?= ;
    RM              ?= delete -y ;
    SLASH           ?= ":" ;
    STDHDRS         ?= ; 
    SUFLIB          ?= .lib ;
    SUFOBJ          ?= .o ;
}
else if $(OS) = BEOS && $(METROWERKS)
{
    AR              ?= mwld -xml -o ;
    BINDIR          ?= /boot/apps ;
    FORTRAN         ?= "" ;
    LIBDIR          ?= /boot/develop/libraries ;
    MANDIR          ?= /boot/documentation/"Shell Tools"/HTML ;
    NOARSCAN        ?= true ;
    STDHDRS         ?= /boot/develop/headers/posix ;
}
else if $(OS) = BEOS 
{
    BINDIR          ?= /boot/apps ;
    FORTRAN         ?= "" ;
    LIBDIR          ?= /boot/develop/libraries ;
    NOARSCAN        ?= true ;
    STDHDRS         ?= /boot/develop/headers/posix ;
}
else if $(UNIX)
{
    switch $(OS)
    {
    case AIX :
        IMPLIB_FLAGS    ?= -bI: ;
        SUFDLL          ?= .so ;
        gLINK_VARIABLE(.so) = NEEDLIBS ;  # shared libs should be added to the list of libs needed
        gLINK_VARIABLE(.imp) = NEEDIMPS ; # import libs are handled separately.
        gSHELL_LIBPATH = LIBPATH ;
        
    case AMIGA :
        YACC            ?= bison -y ;

    case CYGWIN :       
        LEX             ?= flex ;
        RANLIB          ?= "" ;
        SUFEXE          ?= .exe ;
        YACC            ?= bison -y ;
        MKDIR           ?= mkdir -p ;
        SUFDLL          ?= .dll ;

    case DGUX :
        RANLIB          ?= "" ;
        RELOCATE        ?= true ;

    case HPUX :
        RANLIB          ?= "" ;

    case INTERIX :
        RANLIB          ?= "" ;

    case IRIX :
        RANLIB          ?= "" ;

    case KFREEBSD :
        CLONE           ?= cp -fpd ;

    case LINUX :
        CLONE           ?= cp -fpd ;

    case MPEIX :
        HDRS            += /usr/include ;
        RANLIB          ?= "" ; 
        NOARSCAN        ?= true ;
        NOARUPDATE      ?= true ;

    case MVS :
        RANLIB          ?= "" ; 

    case NEXT :
        AR              ?= libtool -o ;
        RANLIB          ?= "" ;

    case MACOSX :
        MANDIR          ?= /usr/local/share/man ;
        SUFDLL          ?= .dylib ;
        gSHELL_LIBPATH  ?= DYLD_LIBRARY_PATH ;
        NOARSCAN        ?= true ;

    case NCR :
        RANLIB          ?= "" ;

    case PTX :
        RANLIB          ?= "" ;

    case QNX :
        AR              ?= wlib ;
        NOARSCAN        ?= true ;
        RANLIB          ?= "" ;

    case SCO :
        RANLIB          ?= "" ;
        RELOCATE        ?= true ;

    case SINIX :
        RANLIB          ?= "" ;

    case SOLARIS :
        RANLIB          ?= "" ;
        AR              ?= "/usr/ccs/bin/ar ru" ;
	STDHDRS         ?= "." ;

    case UNICOS :
        NOARSCAN        ?= true ;
        OPTIM           ?= -O0 ;

    case UNIXWARE :
        RANLIB          ?= "" ;
        RELOCATE        ?= true ;

    case OSF :
        gLINK_VARIABLE(.so) = NEEDLIBS ; # shared objects should be added to the list of libs needed
    }

    # UNIX defaults
    CHMOD           ?= chmod ;
    LEX             ?= lex ;
    OPTIM           ?= -O ;
    RANLIB          ?= ranlib ;
    YACC            ?= yacc ;
    YACCFILES       ?= y.tab ;
    YACCFLAGS       ?= -d ;
    SHELL_EXPORT    ?= "export " ;
    SHELL_SET       ?= "" ;
    gSHELL_LIBPATH  ?= LD_LIBRARY_PATH ;
    BINDIR          ?= /usr/local/bin ;
    LIBDIR          ?= /usr/local/lib ;
    MANDIR          ?= /usr/local/man ;
    STDHDRS         ?= /usr/include ;
}
    
#
# General defaults; a lot like UNIX
#

AR              ?= ar ru ;
AS              ?= as ;
ASFLAGS         ?= ;
AWK             ?= awk ;
BINDIR          ?= ;
CLONE           ?= $(CP) ;
CLONE           ?= cp -fp ;
CP              ?= cp -f ;
CRELIB          ?= ;
DOT             ?= . ;
DOTDOT          ?= .. ;
EXEMODE         ?= 711 ;
DLLMODE         ?= 755 ;
FILEMODE        ?= 644 ;
FORTRAN         ?= f77 ;
FORTRANFLAGS    ?= ;
HDRS            ?= ;
JAMFILE         ?= Jamfile ;
JAMRULES        ?= Jamrules ;
LEX             ?= ;
LIBDIR          ?= ;
LN              ?= ln ;
MANDIR          ?= ;
MKDIR           ?= mkdir ;
MV              ?= mv -f ;
OPTIM           ?= ;
RCP             ?= rcp ;
RM              ?= rm -f ;
RSH             ?= rsh ;
SED             ?= sed ;
SHELLHEADER     ?= "#!/bin/sh" ;
SHELLMODE       ?= 755 ;
SHELL_EXPORT    ?= ;
SHELL_SET       ?= "" ;
SLASH           ?= / ;
SPLITPATH       ?= ":" ; # dwa -- added missing SPLITPATH
STDHDRS         ?= ;
SUFEXE          ?= "" ;
SUFDLL          ?= .so ;
SUFLIB          ?= .a ;
SUFOBJ          ?= .o ;
PREDLL          ?= lib ;
PRELIB          ?= lib ;
UNDEFFLAG       ?= "-u _" ;
YACC            ?= ;
YACCFILES       ?= ;
YACCFLAGS       ?= ;
BIN_DIRECTORY   ?= bin ;

#~ HDRPATTERN = 
        #~ "^[     ]*#[    ]*include[      ]*([<\"][^\">]*[\">]).*$" ;
HDRPATTERN = 
        "^[ 	]*#[ 	]*include[ 	]*([<\"][^\">]*[\">]).*$" ;
          
#" My Jam mode gets its syntax highlighting confused without this comment

OSFULL = $(OS)$(OSVER)$(OSPLAT) $(OS)$(OSPLAT) $(OS)$(OSVER) $(OS) ;

#
# Rule to automate patching of singleton variables from the user so that
# they are correctly interpreted as a single entry instead of as a list if
# they happen to contain spaces.
#
# This also remembers the first(global) value so that it can be reset
# when cleared, but used again.
#
rule set-as-singleton ( variables + )
{
    for local variable in $(variables)
    {
        $(variable) = $($(variable):J=" ") ;
        #~ if ! $(gSINGLETON_SET($(variable)))
        #~ {
            #~ gSINGLETON($(variable)) = $($(variable)) ;
            #~ gSINGLETON_SET($(variable)) = true ;
        #~ }
        #~ $(variable) ?= $(gSINGLETON($(variable))) ;
    }
}

#
# "Fix" the known possibly directory variables.
#
set-as-singleton
    BINDIR
    CW
    JAMFILE
    JAMRULES
    JAMSHELL
    LIBDIR
    MANDIR
    WATCOM
    ;

#
# Base dependencies - first for "bootstrap" kinds of rules
#

# dwa 6/17/01 - added test
DEPENDS all : shell files lib dll exe obj ;
DEPENDS all shell files lib dll exe obj test : first ;
NOTFILE all first shell files lib dll exe obj dirs clean uninstall test nothing ;
ALWAYS clean uninstall ;

#
# Prevent external variables from interfeering with some esnetial intenal
# variables.
#
TOP = ;

#
# Rules
#

# dwa 6/4/01 - added for boost
# type-DEPENDS type : targets...
#
# Use this to create a dependency between a fake type-target and other targets. Will prevent
# targets in dependee subprojects from being added to the type-target's dependencies.
rule type-DEPENDS # type-target : targets...
{
    if ! $(gSUPPRESS_FAKE_TARGETS) && ! $(gIN_LIB_INCLUDE)
    {
        DEPENDS $(<) : $(>) ;
    }
}

# dwa 6/4/01 - added for boost
# Archive file-target : sources
#
# Used to dispatch through Archive-action, which should be redefined in toolset
# description files.
rule Archive
{
    Archive-action $(<) : $(>) ;
}

rule As
{
    DEPENDS $(<) : $(>) ;
    ASFLAGS on $(<) += $(ASFLAGS) $(SUBDIRASFLAGS) ;
}

rule Bulk
{
    local i ;

    for i in $(>)
    {
        File $(i:D=$(<)) : $(i) ;
    }
}

# dwa 6/4/01 - modified for boost
# factored out stuff from the builtin Cc and C++ rules
rule Cc-platform-specifics
{
    # If the compiler's -o flag doesn't work, relocate the .o

    if $(RELOCATE)
    {
        CcMv $(<) : $(>) ;
    }

    local _h = $(SEARCH_SOURCE) $(HDRS) ;

    if $(VMS) && $(_h)
    {
        SLASHINC on $(<) = "/inc=(" $(_h[1]) ,$(_h[2-]) ")" ;
    }
    else if $(MAC) && $(_h)
    {
        local _i _j ;
        _j = $(_h[1]) ;
        for _i in $(_h[2-])
        {
            _j = $(_j),$(_i) ;
        }
        MACINC on $(<) = \"$(_j)\" ;
    }
}

# dwa 6/4/01 - added for boost
# always-c++ filename...
#
# declares that the given files should be compiled as C++, regardless of their
# filename extension.
rule always-c++
{
    gALWAYS_C++ += [ FGristFiles $(<) ] ;
}

# dwa 6/4/01 - modified for boost
rule Cc
{
    DEPENDS $(<) : $(>) ;

    Cc-platform-specifics $(<) : $(>) ;

    if $(>) in $(gALWAYS_C++)
    {
        C++-action $(<) : $(>) ;
    }
    else
    {
        Cc-action $(<) : $(>) ;
    }
}

# dwa 6/4/01 - modified for boost
rule C++
{
    DEPENDS $(<) : $(>) ;

    Cc-platform-specifics $(<) : $(>) ;
    
    C++-action $(<) : $(>) ;
}

rule Chmod
{
    if $(CHMOD) { Chmod1 $(<) ; }
}

# dwa 6/4/01 - added for boost
# conditional <cond> : <true-value> : <false-value>
# returns <true-value> if <cond>, <false-value> otherwise
rule conditional
{
    if $(1) { return $(2) ; } else { return $(3) ; }
}

# dwa 6/4/01 - modified for boost
rule File
{
    type-DEPENDS files : $(<) ;
    DEPENDS $(<) : $(>) ;
    SEARCH on $(>) = $(SEARCH_SOURCE) ;
    MODE on $(<) = $(FILEMODE) ;
    Chmod $(<) ;
}

rule FileClone
{
    type-DEPENDS files : $(<) ;
    DEPENDS $(<) : $(>) ;
    SEARCH on $(>) = $(SEARCH_SOURCE) ;
}

rule Fortran
{
    DEPENDS $(<) : $(>) ;
}

rule GenFile 
{
    local _t = [ FGristSourceFiles $(<) ] ;
    local _s = [ FAppendSuffix $(>[1]) : $(SUFEXE) ] ;
    Depends $(_t) : $(_s) $(>[2-]) ;
    GenFile1 $(_t) : $(_s) $(>[2-]) ;
    Clean clean : $(_t) ;
}

rule GenFile1
{
    MakeLocate $(<) : $(LOCATE_SOURCE) ;
    SEARCH on $(>) = $(SEARCH_SOURCE) ;
}

# dwa 6/4/01 - modified for boost
rule HardLink
{
    type-DEPENDS files : $(<) ;
    DEPENDS $(<) : $(>) ;
    SEARCH on $(>) = $(SEARCH_SOURCE) ;
}

rule HdrRule
{
    # HdrRule source : headers ;

    # N.B.  This rule is called during binding, potentially after
    # the fate of many targets has been determined, and must be
    # used with caution: don't add dependencies to unrelated
    # targets, and don't set variables on $(<).

    # Tell Jam that anything depending on $(<) also depends on $(>),
    # set SEARCH so Jam can find the headers, but then say we don't
    # care if we can't actually find the headers (they may have been
    # within ifdefs),

    local angle-includes = [ MATCH "[<]([^>]+)[>]" : $(>) ] ;
    local quoted-includes = [ MATCH "[\"]([^\"]+)[\"]" : $(>) ] ;

    local s ;

    if $(HDRGRIST) 
    { 
        angle-includes = $(angle-includes:G=$(HDRGRIST)) ;
        quoted-includes = $(quoted-includes:G=$(HDRGRIST)) ;
    } 

    local s = $(angle-includes) $(quoted-includes) ;

    INCLUDES $(<) : $(s) ;
    NOCARE $(s) ;

    SEARCH on $(angle-includes) = $(HDRSEARCH)  ;
    SEARCH on $(quoted-includes) = $(gBINDING($(<)):D) $(HDRSEARCH)  ;
    
    BINDRULE on $(s) = remember-binding ;

    # Propagate on $(<) to $(>)

    HDRSEARCH on $(s) = $(HDRSEARCH) ;
    HDRSCAN on $(s) = $(HDRSCAN) ;
    HDRRULE on $(s) = $(HDRRULE) ;
    HDRGRIST on $(s) = $(HDRGRIST) ;
}
rule HdrSearchAndLocate ( header : search * )
{
    if ! $(gBINDING($(header)))
    {
        local header-glob = [ GLOB "$(search:G=)" : $(header:G=) ] ;
        local header-locate = ;
        for local bound-path in $(header-glob)
        {
            if ! $(header-locate)
            {
                if ! [ GLOB "$(bound-path)" : * ]
                {
                    header-locate = $(bound-path) ;
                }
            }
        }
        if $(header-locate)
        {
            LOCATE on $(header) = $(header-locate:D) ;
            gBINDING($(header)) = $(header-locate) ;
        }
        else
        {
            LOCATE on $(header) = $(DOT) ;
            gBINDING($(header)) = $(header:G=:R=$(DOT)) ;
        }
    }
}

# dwa 6/4/01 - modified for boost
rule InstallInto
{
    local i t ;

    t = $(>:G=installed) ;

    type-DEPENDS install : $(t) ;
    DEPENDS $(t) : $(>) ;
    SEARCH on $(>) = $(SEARCH_SOURCE) ;
    MakeLocate $(t) : $(<) ;

    # Arrange for jam uninstall

    Clean uninstall : $(t) ;

    for i in $(>)
    {
        Install $(i:G=installed) : $(i) ;
    }

    Chmod $(t) ;

    if $(UNIX)
    {
        if $(OWNER) { Chown $(t) ; OWNER on $(t) = $(OWNER) ; }
        if $(GROUP) { Chgrp $(t) ; GROUP on $(t) = $(GROUP) ; }
    }
}

rule InstallBin
{
    local _t = [ FAppendSuffix $(>) : $(SUFEXE) ] ;

    InstallInto $(<) : $(_t) ;
    MODE on $(_t:G=installed) = $(EXEMODE) ;
}

rule InstallFile
{
    InstallInto $(<) : $(>) ;
    MODE on $(>:G=installed) = $(FILEMODE) ;
}

rule InstallLib
{
    InstallInto $(<) : $(>) ;
    MODE on $(>:G=installed) = $(FILEMODE) ;
}

rule InstallMan
{
    # Really this just strips the . from the suffix

    local i s d ;

    for i in $(>)
    {
        switch $(i:S)
        {
        case .1 : s = 1 ; case .2 : s = 2 ; case .3 : s = 3 ;
        case .4 : s = 4 ; case .5 : s = 5 ; case .6 : s = 6 ;
        case .7 : s = 7 ; case .8 : s = 8 ; case .l : s = l ;
        case .n : s = n ; case .man : s = 1 ;
        }

        d = man$(s) ;

        InstallInto $(d:R=$(<)) : $(i) ;
    }

    MODE on $(>:G=installed) = $(FILEMODE) ;
}

rule InstallShell
{
    InstallInto $(<) : $(>) ;
    MODE on $(>:G=installed) = $(SHELLMODE) ;
}

# dwa 6/4/01 - modified for boost
rule Lex # file.c : file.l
{
    # If we don't have a way of specifying the lex output file, we'll have to move it
    # We'd rather not do this if possible because: a. lex generates #line
    # directives for the output file which would refer to the wrong place and
    # b. the Jam invocation directory could be read-only
    if ! $(LEX_OUTPUT)
    {
        LexMv $(<) : $(>) ;
    }
    
    DEPENDS $(<) : $(>) ;
    MakeLocate $(<) : $(LOCATE_SOURCE) ;
    SEARCH on $(<) = $(LOCATE_SOURCE) ;
    Clean clean : $(<) ;
}

# dwa 6/4/01 - modified for boost
rule Library
{
    LibraryFromObjects $(<) : [ Objects $(>) ] ;
}

# dwa 6/4/01 - modified for boost
rule LibraryFromObjects
{
    local _i _l ;

    _l = $(<:S=$(SUFLIB)) ;

    # library depends on its member objects

    if $(KEEPOBJS)
    {
        type-DEPENDS obj : $(>) ;
    }
    else
    {
        type-DEPENDS lib : $(_l) ;
    }

    # Set LOCATE for the library and its contents.  The bound
    # value shows up as $(NEEDLIBS) on the Link actions.
    # For compatibility, we only do this if the library doesn't
    # already have a path.

    if ! $(_l:D)
    {
        MakeLocate $(_l) $(_l)($(>:BS)) : $(LOCATE_TARGET) ;
    }

    if $(NOARSCAN) 
    { 
        # If we can't scan the library to timestamp its contents,
        # we have to just make the library depend directly on the
        # on-disk object files.  

        DEPENDS $(_l) : $(>) ;
    }
    else
    {
        # If we can scan the library, we make the library depend
        # on its members and each member depend on the on-disk
        # object file.

        DEPENDS $(_l) : $(_l)($(>:BS)) ;

        for _i in $(>)
        {
            DEPENDS $(_l)($(_i:BS)) : $(_i) ;
        }
    }

    Clean clean : $(_l) ;

    if $(CRELIB) { CreLib $(_l) : $(>[1]) ; }

    Archive $(_l) : $(>) ;

    if $(RANLIB) { Ranlib $(_l) ; }

    # If we can't scan the library, we have to leave the .o's around.

    if ! ( $(NOARSCAN) || $(KEEPOBJS) ) { RmTemps $(_l) : $(>) ; }
}

# dwa 6/4/01 - modified for boost to dispatch through Link-action and to pass
# the target-type through. *** NOW UNUSED BY BOOST ***
#
# Link executable-target : object-target...
rule Link
{
    MODE on $(<) = $(EXEMODE) ;
    Link-action $(<) : $(>) : $(3) ;
    Chmod $(<) ;
}

rule LinkLibraries
{
    # make library dependencies of target
    # set NEEDLIBS variable used by 'actions Main'

    local _t = [ FAppendSuffix $(<) : $(SUFEXE) ] ;

    DEPENDS $(_t) : $(>:S=$(SUFLIB)) ;
    NEEDLIBS on $(_t) += $(>:S=$(SUFLIB)) ;
}

# dwa 6/4/01 - modified for boost
rule Main
{
    MainFromObjects $(<) : [ Objects $(>) ] ;
}

# dwa 6/4/01 - modified for boost
rule MainFromObjects
{
    local _s _t ;

    # Add grist to file names
    # Add suffix to exe

    _s = $(>) ;
    _t = [ FAppendSuffix $(<) : $(SUFEXE) ] ;

    if $(_t) != $(<)
    {
        DEPENDS $(<) : $(_t) ;
        NOTFILE $(<) ;
    }

    # make compiled sources a dependency of target

    type-DEPENDS exe : $(_t) ;
    DEPENDS $(_t) : $(_s) ;
    MakeLocate $(_t) : $(LOCATE_TARGET) ;

    Clean clean : $(_t) ;

    Link $(_t) : $(_s) ;
}

# dwa 6/4/01 - modified for boost
rule MakeLocate
{
    if $(>)
    {
        LOCATE on $(<) = $(>) ;

        # provide a way to get back the location from a built target name.
        gLOCATE($(<)) = $(>) ; 
        
        # We add directory-grist here so that implicitly-created directory
        # target names don't collide with user-specified targets.
        Depends $(<) : [ MkDir $(>[1]:G=directory-grist) ] ;
    }
}

# now returns the created directory target -- dwa
rule MkDir
{
    # If dir exists, don't update it
    # Do this even for $(DOT).

    local dir = $(<) ;
    if $(NT)
    {
        # make sure slashes all go the right way
        dir = [ split-path $(dir) ] ;
        dir = $(dir:J=$(SLASH)) ;
    }
    
    local result = $(dir) ;
    
    while $(dir) && ( $(dir) != $(DOT) ) && ! $($(dir)-mkdir) 
    {
        # Cheesy gate to prevent multiple invocations on same dir
        # MkDir1 has the actions 
        # Arrange for jam dirs

        $(dir)-mkdir = true ;
        MkDir1 $(dir) ;
        Depends dirs : $(dir) ;
        NOUPDATE $(dir) ;


        # Recursively make parent directories.
        # $(dir:P) = $(dir)'s parent, & we recurse until root

        local s = $(dir:P) ;

        if $(NT)
        {
            switch $(s)
            {
            case *:   : s = ;
            case *:\\ : s = ;
            }
        }

        if $(s) && $(s) != $(dir)
        {
            Depends $(dir) : $(s) ;
            dir = $(s) ;
        }
        else 
        {
            dir = ; # stop iterating
            if $(s) { NOTFILE $(s) ; }
        }
    }
    return $(result) ;
}

# dwa 6/4/01 - modified for boost
rule Object
{
    local h ;

    type-DEPENDS obj : $(<) ;
    set-target-variables $(<) ;
    
    # Make it possible to compile a given source file by giving its
    # object file name as a target.
    type-DEPENDS $(<:G=) : $(<) ; 
    
    # locate object and search for source, if wanted

    Clean clean : $(<) ;

    MakeLocate $(<) : $(LOCATE_TARGET) ;
    SEARCH on $(>) = $(SEARCH_SOURCE) ;

    # Save HDRS for -I$(HDRS) on compile.
    # We shouldn't need -I$(SEARCH_SOURCE) as cc can find headers
    # in the .c file's directory, but generated .c files (from
    # yacc, lex, etc) are located in $(LOCATE_TARGET), possibly
    # different from $(SEARCH_SOURCE).

    # Use unique to clean up confusing duplicates a bit
    HDRS on $(<) = [ unique $(LOCATE_SOURCE) $(HDRS) ] ;

    # Set STDHDRS on the object so that multi-compiler builds will search for
    # headers in the right places. 
    STDHDRS on $(<) = $(STDHDRS) ;
    SYSHDRS on $(<) = $(SYSHDRS) ;

    # handle #includes for source: Jam scans for headers with
    # the regexp pattern $(HDRSCAN) and then invokes $(HDRRULE)
    # with the scanned file as the target and the found headers
    # as the sources.  HDRSEARCH is the value of SEARCH used for
    # the found header files.  Finally, if jam must deal with 
    # header files of the same name in different directories,
    # they can be distinguished with HDRGRIST.

    # $(h) is where cc first looks for #include "foo.h" files.
    # If the source file is in a distant directory, look there.
    # Else, look in "" (the current directory).

    if $(SEARCH_SOURCE)
    {
        h = $(SEARCH_SOURCE)$(SLASH)$(>:D) ;
    }
    else
    {
        h = $(>:D) ;
    }

    HDRRULE on $(>) = HdrRule ;
    HDRSCAN on $(>) = $(HDRPATTERN) ;
    HDRSEARCH on $(>) = $(HDRS) $(h) $(STDHDRS) $(SYSHDRS) ;
    HDRGRIST on $(>) = $(HDRGRIST) ;

    # if source is not .c, generate .c with specific rule

    # make sure we don't generate the same object twice.
    if ! $(gGENERATED_TARGET($(<)))
    {
        switch $(>:S)
        {
            case .asm : As $(<) : $(>) ;
            case .c :   Cc $(<) : $(>) ;
            case .C :   C++ $(<) : $(>) ;
            case .cc :  C++ $(<) : $(>) ;
            case .cpp : C++ $(<) : $(>) ;
            case .cxx : C++ $(<) : $(>) ;
            case .f :   Fortran $(<) : $(>) ;
            case .s :   As $(<) : $(>) ;
            case * :    UserObject $(<) : $(>) ;
        }
        gGENERATED_TARGET($(<)) = true ;
    }
}
    
# dwa 6/4/01 - added for boost
# Return the corresponding object file target names given a list of source file
# target names.
rule object-name # sources...
{
    return $(<:D=:S=$(SUFOBJ):G=$(TARGET_GRIST)) ;
}

# dwa 6/4/01 - added for boost
# Build a generated source file from input-target, and build whatever that file generates.
# Return a list of all object target names ultimately generated by recursively
# building the products of input-target.
rule gen-source # source => object-file-names
{
    local suffix = .c ;
    if $(<:S) in .lpp .ypp
    {
        suffix = .cpp ;
    }
    
    local immediate-target = $(<:D=:S=$(suffix):G=$(SOURCE_GRIST)) ;
    # make sure we don't regenerate sources twice.
    if ! $(gGENERATED_TARGET($(immediate-target)))
    {
        switch $(<:S)
        {
         case .l* : Lex $(immediate-target) : $(<) ; SEARCH on $(<) = $(SEARCH_SOURCE) ;
         case .y* : Yacc $(immediate-target) : $(<) ; SEARCH on $(<) = $(SEARCH_SOURCE) ;
        }
        gGENERATED_TARGET($(immediate-target)) = true ;
    }
    return [ Objects $(immediate-target) ] ;
}

# dwa 6/4/01 - added for boost
# A list of all file extensions which generate source files when built.
SOURCE_GENERATING_EXTENSIONS ?= .lpp .ypp .l .y ;

# dwa 6/4/01 - modified for boost
# Build all object files generated by building $(<), and return a list of the
# names of those object file targets.
rule Objects
{
    local _i _n _r ;


    for _i in $(<)
    {
        if $(_i:S) in $(SOURCE_GENERATING_EXTENSIONS)
        {
            _n = [ gen-source $(_i) ] ;
        }
        else
        {
            _n = [ object-name $(_i) ] ;
            Object $(_n) : $(_i) ;
        }
        _r += $(_n) ;
    }
    
    return $(_r) ;
}

rule RmTemps
{
    TEMPORARY $(>) ;
}

rule Setuid
{
    MODE on [ FAppendSuffix $(<) : $(SUFEXE) ] = 4711 ;
}

# dwa 6/4/01 - modified for boost
rule Shell
{
    type-DEPENDS shell : $(<) ;
    DEPENDS $(<) : $(>) ;
    SEARCH on $(>) = $(SEARCH_SOURCE) ;
    MODE on $(<) = $(SHELLMODE) ;
    Clean clean : $(<) ;
    Chmod $(<) ;
}

# dwa 6/7/01 - added for boost
# subproject path
#
# Invokes SubDir with a path description
rule subproject
{
    SubDir TOP [ split-path $(<) ] ;
}

# dwa 6/18/01 - added for boost
# project-root
#
# Declares this directory to be the project root.
rule project-root ( )
{
    local project-location ;
    if $(gTOP)
    {
        project-location = [ root-paths $($(gTOP)) : [ PWD ] ] ;
    }
    else
    {
        project-location = [ PWD ] ;
    }
    local name ;
    name = $(PROJECT($(project-location))) ;
    name ?= $(project-location:B) ;
    PROJECT = $(name) ;
    gPROJECT($(name)) = $(project-location) ;
    SubDir TOP ;
}

# grafik.
#
# Declare either your own project, or an external project.
#
rule project ( name : location ? )
{
    if ! $(location)
    {
        gPROJECT($(name)) = $(gPROJECT($(PROJECT))) ;
        PROJECT($(gPROJECT($(name)))) = $(name) ;
        PROJECT = $(name) ;
    }
    else
    {
        gPROJECT($(name)) = [ root-paths $(location) : [ root-paths $($(gTOP)) : [ PWD ] ] ] ;
        local [ protect-subproject ] ;
        enter-subproject @$(name) ;
    }
}

# grafik.
#
# Returns the set of vars to localize to prevent changes from
# affecting the current project. Also remembers the current values
# to use by enter-subproject to set the defaults for the new vars.
#
rule protect-subproject ( )
{
    .TOP = $(TOP) ;
    .TOP_TOKENS = $(TOP_TOKENS) ;
    .gTOP = $(gTOP) ;
    .PROJECT = $(PROJECT) ;
    return TOP TOP_TOKENS gTOP PROJECT [ protect-subdir ] ;
}

# grafik.
#
# Sets up the environment as if the context is another project in
# preparation to include the external projects targets. This also
# works for refering to the current project.
#
rule enter-subproject ( project-path )
{
    TOP = $(.TOP) ;
    TOP_TOKENS = $(.TOP_TOKENS) ;
    gTOP = $(.gTOP) ;
    PROJECT = $(.PROJECT) ;
    
    local project-name = [ MATCH "^@([^/\\]+)" : $(project-path) ] ;
    project-name ?= $(PROJECT) ;
    project-name ?= "" ;
    local project-subdir = [ MATCH "^@[^/\\]+[/\\](.*)" : $(project-path) ] ;
    local project-top ;
    
    if $(project-name)
    {
        project-top = [ split-path $(gPROJECT($(project-name))) ] ;
        if $(project-subdir)
        {
            project-top +=
                [ split-path [ relative-path $(project-subdir) ] ]
                [ split-path [ FSubDir [ split-path [ relative-path $(project-subdir) ] ] ] ] ;
        }
        TOP = [ join-path $(project-top) ] ;
        TOP_TOKENS = $(project-top) ;
        gTOP = TOP ;
        PROJECT = $(project-name) ;
    }
    project-subdir ?= . ;
    
    subproject $(project-subdir) ;
    
    return $(project-name) $(project-subdir) ;
}

# dwa 6/7/01 - added for boost
# subinclude path...
#
# Invokes SubInclude for each path
rule subinclude
{
    local d ;
    for d in $(<)
    {
        SubInclude TOP [ split-path $(d) ] ;
    }
}

# dwa 10/6/01 - added for boost
#
# path-global variable-name : path... ;
#
# if $(variable-name) is unset, sets variable-name to path...
# variable-name will be adjusted on a per-subproject basis to refer to the same path.
rule path-global
{
    $(<) ?= $(>) ;
    gPATH_GLOBAL_VALUE($(<)) = $($(<)) ;
    
    if ! ( $(<) in $(gPATH_GLOBALS) )
    {
        gPATH_GLOBALS += $(<) ;
    }
}

# dwa 6/4/01 - modified for boost
rule SubDir
{
    local _r ;

    #
    # SubDir TOP d1 [ ... ]
    #
    # This introduces a Jamfile that is part of a project tree 
    # rooted at $(TOP).  It (only once) includes the project-specific
    # rules file $(TOP)/Jamrules and then sets search & locate stuff.
    #
    # If the variable $(TOPRULES) is set (where TOP is the first arg 
    # to SubDir), that file is included instead of $(TOP)/Jamrules.
    #
    # d1 ... are the directory elements that lead to this directory 
    # from $(TOP).  We construct the system dependent path from these
    # directory elements in order to set search&locate stuff.
    # 

    if ! $($(<[1]))
    {
        if ! $(<[1])
        {
            EXIT SubDir syntax error ;
        }

        $(<[1]) = [ FSubDir $(<[2-]) ] ;
        $(<[1])_TOKENS = [ split-path $($(<[1])) ] ;
        gTOP = $(<[1]) ; #  not sure why someone would want to use anything
                         # other than TOP, but just in case...
    }

    # Get path to current directory from root using SubDir.
    # Save dir tokens for other potential uses.
    local .SUBDIR_TOKENS = $(<[2-]) ;
    
    # This allows us to determine whether we're in the directory where jam was
    # invoked from so that we can make locally named targets
    gINVOCATION_SUBDIR_TOKENS ?= $(.SUBDIR_TOKENS) ;
    gINVOCATION_SUBDIR_TOKENS ?= $(DOT) ;

    #
    # If $(TOP)/Jamrules hasn't been included, do so.
    #

    local top = [ root-paths $($(gTOP)) : [ PWD ] ] ;
    if ! $(gINCLUDED($(JAMRULES:R=$(top))))
    {
        # Gated entry.

        gINCLUDED($(JAMRULES:R=$(top))) = TRUE ;

        # Include it.

        project-root ;
        include $(JAMRULES:R=$(top)) ;
    }

    # Get path to current directory from root using SubDir.
    # Save dir tokens for other potential uses.
    SUBDIR_TOKENS = $(<[2-]) ;
    
    # SUBDIR is the path from the invocation directory to the subproject
    # directory.
    SUBDIR = [ tokens-to-simple-path $($(gTOP)_TOKENS)  $(SUBDIR_TOKENS) ] ;

    SEARCH_SOURCE = $(SUBDIR) ;

    # This will strip off any leading dot on SUBDIR_TOKENS
    local nodot_subdir = [ simplify-path-tokens $(SUBDIR_TOKENS) ] ;

    if $(ALL_LOCATE_TARGET) && ! $(first_ALL_LOCATE_TARGET)
    {
        normalized_ALL_LOCATE_TARGET = [ join-path $($(gTOP)) $(ALL_LOCATE_TARGET) ] ;
    }
    else
    {
        normalized_ALL_LOCATE_TARGET ?= [ join-path $($(gTOP)) $(ALL_LOCATE_TARGET) ] ;
    }
    first_ALL_LOCATE_TARGET ?= $(ALL_LOCATE_TARGET) ;
    LOCATE_SOURCE = [ FDirName $(normalized_ALL_LOCATE_TARGET) $(BIN_DIRECTORY) $(PROJECT) $(nodot_subdir) ] ;
    LOCATE_TARGET = $(LOCATE_SOURCE) ;
    HCACHEFILE = [ FDirName $(normalized_ALL_LOCATE_TARGET) $(BIN_DIRECTORY) .jamdeps ] ;
    
    SOURCE_GRIST = [ FGrist @$(PROJECT) $(SUBDIR_TOKENS) ] ;

    # Reset per-directory ccflags, hdrs

    SUBDIRCCFLAGS = ;
    SUBDIRC++FLAGS = ;

    # This variable holds the path from the directory of Jam's invocation to the
    # directory of the current subproject.
    RELATIVE_SUBDIR_TOKENS = [ simplify-path-tokens $($(gTOP)_TOKENS) $(SUBDIR_TOKENS) : $(DOT) ] ;
    RELATIVE_SUBDIR = [ join-path $(RELATIVE_SUBDIR_TOKENS) ] ;

    adjust-path-globals ;
}

rule in-invocation-subdir
{
    local subdir-tokens = $(SUBDIR_TOKENS) ;
    subdir-tokens ?= $(DOT) ;
    if $(subdir-tokens) = $(gINVOCATION_SUBDIR_TOKENS)
    {
        return true ;
    }
}

# These are the global variables that get set up by SubDir. If you need to
# invoke SubDir temporarily and then restore them, declare
#       local $(gSUBDIR_GLOBALS) ;
gSUBDIR_GLOBALS = SUBDIR SUBDIR_TOKENS SEARCH_SOURCE LOCATE_SOURCE LOCATE_TARGET
    SOURCE_GRIST RELATIVE_SUBDIR RELATIVE_SUBDIR_TOKENS ; 


rule protect-subdir
{
    return $(gSUBDIR_GLOBALS) $(gPATH_GLOBALS) ;
}

# prepends root to any unrooted elements of paths, and simplifies
rule root-paths ( paths * : root )
{
    local path result ;
    for path in $(paths)
    {
        local rooted = $(path:R=$(root)) ;
        path = [ tokens-to-simple-path [ split-path $(rooted:G=) ] ] ;
        path = $(path:G=$(rooted:G)) ;
        result += $(path) ;
    }
    return $(result) ;
}

# Adjust all path globals so that they are relative to the current subproject.
rule adjust-path-globals
{
    # compute path tokens from current subproject to root
    local tokens-to-root = [ split-path [ FSubDir $(SUBDIR_TOKENS) ] ] ;
    
    # compute path tokens from current subproject to invocation
    # directory. $(DOT) is added just in case we're building from the project
    # root
    local tokens-to-invocation
        = $(tokens-to-root) $(gINVOCATION_SUBDIR_TOKENS) ;
         
    local variable ;
    for variable in $(gPATH_GLOBALS)
    {
        local paths = $(gPATH_GLOBAL_VALUE($(variable))) ;
        $(variable) = ;
        local path ;
        for path in $(paths)
        {
            # is path already rooted?
            if $(path:R=x) = $(path)
            {
                $(variable) += $(path) ;
            }
            else
            {
                local tokens = $(tokens-to-invocation) [ split-path $(path) ] ;
                $(variable) += [ tokens-to-simple-path $(tokens) ] ;
            }
        }
    }
}

# dwa 6/4/01 - added for boost
# strip-grist value
#
# strip all leading gristed elements from value and return the result.
rule strip-grist
{
    local x = $(<:G=) ;
    if ! $(x:G)
    {
        return $(x) ;
    }
    else
    {
        return [ strip-grist $(x) ] ;
    }
}

# dwa 6/4/01 - added for boost
# Breaks $(<) into path components
# This could certainly be improved now that we have David Turner's regular expression features.
#
# split-path <foo>bar/<bee>baz/mumble  => <foo>bar <bee>baz mumble 
rule split-path
{
    local result = $(gSPLIT-PATH.$(<)) ;

    if ! $(result)
    {
        local parent = $(<:P) ;
        if $(NT)
        {
            switch $(<:G=)
            {
                # It turns out that to match a backslash, you need a /quadruple/ slash
                # in the case clause!
                case *\\\\*:* : # continue splitting
                  case *:\\\\*\\\\* :  # continue splitting
                  case *:/*\\\\* :  # continue splitting
                  case *:\\\\*/* :  # continue splitting
                  case *:/*/* :  # continue splitting
                  case *:/* : result = $(<) ;
                case *:\\\\* : result = $(<) ;
                case *: : result = $(<) ;
            }
        }

        if ( ! $(<:B) ) && ( $(<) != $(DOT) ) # handle the case where $(<) is all grist.
        {
            result ?= $(<:G) ;
        }
        else if ( ! $(parent:G=) )
        {
            result ?= $(<) ;
        }
        else
        {
            local p = [ split-path $(parent) ] ;
            local b = [ strip-grist $(<) ] ;
            p += $(b:D=) ; # can't use :B here because it destroys . and ..
            result ?= $(p) ;
        }
        gSPLIT-PATH.$(<) = $(result) ;
    }
    return $(result) ;
}

rule split ( string separator )
{
    local result ;
    local s = $(string) ;
    
    while $(s)
    {
        local match = [ MATCH ^(.*)$(separator)(.*) : $(s) ] ;
        
        local tail = $(match[2]) ;
        tail ?= $(s) ;

        result = $(tail) $(result) ;
        s = $(match[1]) ;
    }
    return $(result) ;
}

rule split-path ( path )
{
    if ! $(gSPLIT_PATH_CACHE($(path)))
    {
        gSPLIT_PATH_CACHE($(path)) =
          [ MATCH  "^([/$(SLASH)]+).*" : $(path) ] # rooting slash(es), if any
            [ split $(path) "[/$(SLASH)]" ]        # the rest.
              ;
    }
    return $(gSPLIT_PATH_CACHE($(path))) ;
}

# dwa 6/4/01 - added for boost
# reverse item1 item2... 
#
# Returns ...item2 item1
rule reverse
{
    local result ;
    for x in $(<)
    {
        result = $(x) $(result) ;
    }
    return $(result) ;
}

# dwa 6/28/01 - added for boost
# strip-initial tokens... : input
#
# if input begins with tokens, remove the initial sequence of tokens and return
# the rest. Otherwise return input unchanged.
rule strip-initial
{
    local result = $(>) ;
    local t ;
    local matched = true ;
    for t in $(<)
    {
        if $(matched) && ( $(t) = $(result[1]) )
        {
            result = $(result[2-]) ;
        }
        else
        {
            matched = ;
            result = $(>) ;
        }
    }
    return $(result) ;
}

# dwa 6/4/01 - added for boost
# simplify-path-tokens token1 token2 ... tokenN : DOT-opt
#
# Remove redundant information from the given path elements
# if DOT-opt is supplied, empty results are replaced with
# $(DOT-opt).
#
# [ simplify-path-tokens a b . c .. .. d e ] => a d e
# [ simplify-path-tokens a b .. .. .. d e ]  => .. d e
# [ simplify-path-tokens .. .. d e : xxx ]   => .. .. d e (provided TOP != ../..)
# [ simplify-path-tokens a b .. .. : xxx ]   => xxx
rule simplify-path-tokens
{
    local reverse-path = [ reverse $(<) ] ;
    local dotdots ;
    local result ;
    local token ;
    for token in $(reverse-path)
    {
        if $(token) = $(DOT)
        {
        }
        else if $(token) = $(DOTDOT)
        {
            dotdots += $(token) ;
        }
        else if $(dotdots)
        {
            dotdots = $(dotdots[2-]) ;
        }
        else
        {
            result = $(token) $(result) ;
        }
    }

    result = $(dotdots) $(result) ;
    result = [ strip-initial $($(gTOP)_TOKENS) $(gINVOCATION_SUBDIR_TOKENS) : $(result) ] ;
    result ?= $(>) ;
    return $(result) ;
}

rule tokens-to-simple-path
{
    return [ FDirName [ simplify-path-tokens  $(<) ] ] ;
}

rule SubDirCcFlags
{
    SUBDIRCCFLAGS += $(<) ;
}

rule SubDirC++Flags
{
    SUBDIRC++FLAGS += $(<) ;
}

rule SubDirHdrs
{
    SUBDIRHDRS += $(<) ;
}

rule SubInclude
{
    local _s ;

    # That's
    #       SubInclude TOP d1 [ d2 [ d3 [ d4 ] ] ]
    #
    # to include a subdirectory's Jamfile.

    if ! $($(<[1]))
    {
        EXIT Top level of source tree has not been set with $(<[1]) ;
    }

    _s = [ FDirName $(<[2-]) ] ;

    # protect variables from being permanently set by SubDir invocations
    # in included files.
    local project = $(PROJECT) ;
    local [ protect-subdir ] ;
    PROJECT = $(project) ;
    local jamfile-path
        = [ tokens-to-simple-path
            [ split-path $(JAMFILE:D=$(_s):R=$($(<[1]))) ] ] ;
    load-jamfiles $(jamfile-path) ;
}

# Load a user's Jamfile(s).
#
rule load-jamfiles ( jamfiles * )
{
    # First we load the Jamfiles without generation of main targets so that
    # dependencies are preloaded. Then we reload the files with target
    # generation enabled.
    
    local jamfile ;
    local as-dependant = $(gIN_LIB_INCLUDE) ;
    local gIN_LIB_INCLUDE ;
    
    gIN_LIB_INCLUDE = TRUE ;
    for jamfile-path in $(jamfiles)
    {
        if ! $(gINCLUDED_AS_DEPENDANT($(jamfile-path)))
        {
            gINCLUDED_AS_DEPENDANT($(jamfile-path)) = TRUE ;
            include $(jamfile-path) ;
        }
    }
    
    if ! $(as-dependant)
    {
        gIN_LIB_INCLUDE = ;
        for jamfile-path in $(jamfiles)
        {
            if ! $(gINCLUDED($(jamfile-path)))
            {
                gINCLUDED($(jamfile-path)) = TRUE ;
                include $(jamfile-path) ;
            }
        }
    }
}

rule Undefines
{
    UNDEFS on [ FAppendSuffix $(<) : $(SUFEXE) ] += $(UNDEFFLAG)$(>) ;
}

rule UserObject
{
    EXIT "Unknown suffix on" $(>) "- see UserObject rule in Jamfile(5)." ;
}

# dwa 6/4/01 - modified for boost
rule Yacc
{
    local _h ;

    # Can't just replace .cpp with .h, because bison seems to generate a .cpp.h file
    _h = $(<).h ;

    # Some places don't have a yacc.

    MakeLocate $(<) $(_h) : $(LOCATE_SOURCE) ;
    SEARCH on $(<) $(_h) = $(LOCATE_SOURCE) ;

    if $(YACC)
    {
        DEPENDS $(<) $(_h) : $(>) ;

        # if YACC can accept an output file, we'll just generate the file there.
        YACCFILES on $(<) $(_h) = [ join-path $(LOCATE_SOURCE) $(<[1]) ] ;
        
        Yacc1 $(<) $(_h) : $(>) ;
        
        if ! $(YACC_OUTPUT)
        {
            YaccMv $(<) $(_h) : $(>) ;
        }
        
        Clean clean : $(<) $(_h) ;
    }

    # make sure someone includes $(_h) else it will be
    # a deadly independent target

    INCLUDES $(<) : $(_h) ;
}

rule remember-binding ( target : bound-path ) {
    gBINDING($(target)) = $(bound-path) ;
}

#
# Utility rules; no side effects on these
#

rule FGrist
{
    # Turn individual elements in $(<) into grist.

    local _g _i ;

    _g = $(<[1]) ;

    for _i in $(<[2-])
    {
        _g = $(_g)!$(_i) ;
    }

    return $(_g) ;
}

rule FGristFiles 
{
    if ! $(SOURCE_GRIST)
    {
        return $(<) ;
    }
    else 
    {
        return $(<:G=$(SOURCE_GRIST)) ;
    }
}

# dwa 6/4/01 - modified for boost
rule FGristSourceFiles
{
    # Produce source file name name with grist in it, 
    # if SOURCE_GRIST is set.

    # Leave header files alone, because they have a global
    # visibility.

    if ! $(SOURCE_GRIST)
    {
        return $(<) ;
    }
    else 
    {
        local _i _o ;

        for _i in $(<)
        {
            switch $(_i)
            {
            case *.h :      _o += $(_i) ;
            case *.hpp :      _o += $(_i) ;
            case * :        _o += $(_i:G=$(SOURCE_GRIST)) ;
            }
        }

        return $(_o) ;
    }
}

# dwa 6/4/01 - modified for boost
# join values... : [separator]
#
# Pastes values together into a single list element, separated by an optional separator.
rule join ( values * : sep ? )
{
    sep ?= "" ;
    return $(values:J=$(sep)) ;
}

# Given $(<), the tokens comprising a relative path from D1 to a subdirectory
# D2, return the relative path from D2 to D1, using ../../ etc.
rule FSubDir
{
    local _d ;

    if ! $(<[1]) 
    {
        _d = $(DOT) ;
    } 
    else
    {
        _d = $(DOTDOT) ;

        local _i ;
        for _i in $(<[2-])
        {
            _d = $(_d:R=$(DOTDOT)) ;
        }
    }

    return $(_d) ;
}

# dwa 6/4/01 - added for boost
# Turn individual elements in $(<) into a usable path. If $(<) is empty, $(>) is
# returned.
rule join-path
{
    local _s _i ;

    if ! $(<)
    {
        _s = $(>) ;
    }
    else if $(VMS)
    {
        # This handles the following cases:
        #   a -> [.a]
        #   a b c -> [.a.b.c]
        #   x: -> x:
        #   x: a -> x:[a]
        #   x:[a] b -> x:[a.b]

        switch $(<[1])
        {
        case *:* : _s = $(<[1]) ;
        case \\[*\\] : _s = $(<[1]) ;
        case * : _s = [.$(<[1])] ;
        }

        for _i in [.$(<[2-])]
        {
            _s = $(_i:R=$(_s)) ;
        }
    }
    else if $(MAC)
    {
        _s = $(DOT) ;

        for _i in $(<)
        {
            _s = $(_i:R=$(_s)) ;
        }
    }
    else
    {
        _s = $(<[1]) ;
        local _r = $(<[2-]) ;

        # Jam doesn't handle the root directory properly
        if $(_s) in / $(SLASH)
        {
            _s = $(_s)$(_r[1]) ;
            _r = $(_r[2-]) ;
        }
        
        for _i in $(_r)
        {
            _s = $(_i:R=$(_s)) ;
        }
    }

    return $(_s) ;
}

# dwa 6/4/01 - modified for boost
rule FDirName
{
    # Turn individual elements in $(<) into a usable path.
    return [ join-path $(<) : $(DOT) ] ;
}


rule _makeCommon
{
    # strip common initial elements

    if $($(<)[1]) && $($(<)[1]) = $($(>)[1])
    {
        $(<) = $($(<)[2-]) ;
        $(>) = $($(>)[2-]) ;
        _makeCommon $(<) : $(>) ;
    }
}


rule FRelPath
{
    local _l _r ;

    # first strip off common parts

    _l = $(<) ;
    _r = $(>) ;

    _makeCommon _l : _r ;

    # now make path to root and path down

    _l = [ FSubDir $(_l) ] ;
    _r = [ FDirName $(_r) ] ;

    # Concatenate and save

    # XXX This should be better

    if $(_r) = $(DOT) {
        return $(_l) ;
    } else {
        return $(_r:R=$(_l)) ;
    }
}

# dwa 6/17/01 - modified for boost to handle multiple suffixes
rule FAppendSuffix
{
   # E.g., "FAppendSuffix yacc lex foo.bat : $(SUFEXE) ;"
   # returns (yacc,lex,foo.bat) on Unix and 
   # (yacc.exe,lex.exe,foo.bat) on NT.

    if $(>)
    {
        local _i _o ;

        for _i in $(<)
        {
            if $(_i:S)
            {
                _o += $(_i) $(_i:S=$(>[2-])) ;
            }
            else
            {
                _o += $(_i:S=$(>)) ;
            }
        }
        return $(_o) ;
    }
    else
    {
        return $(<) ;
    }
}

rule unmakeDir
{
    if $(>[1]:D) && $(>[1]:D) != $(>[1]) && $(>[1]:D) != \\\\ 
    {
        unmakeDir $(<) : $(>[1]:D) $(>[1]:BS) $(>[2-]) ;
    }
    else
    {
        $(<) = $(>) ;
    }
}

#
# Actions
#

#
# First the defaults
#

actions As
{
    $(AS) $(ASFLAGS) -I$(HDRS) -o $(<) $(>)
}

actions Chgrp
{
    chgrp $(GROUP) $(<)
}

actions Chmod1
{
    $(CHMOD) $(MODE) "$(<)"
}

actions Chown
{
    chown $(OWNER) $(<)
}

actions piecemeal together existing Clean
{
    $(RM) "$(>)" $(NULL_OUT)
}

actions File
{
    $(CP) "$(>)" "$(<)" $(NULL_OUT)
}

actions FileClone
{
    $(CLONE) "$(>)" "$(<)" $(NULL_OUT)
}

actions GenFile1
{
    $(>[1]) $(<) $(>[2-])
}

actions Fortran
{
    $(FORTRAN) $(FORTRANFLAGS) -o $(<) $(>)
}

actions HardLink
{
    $(RM) "$(<)" 2$(NULL_OUT) $(NULL_OUT)
    $(LN) "$(>)" "$(<)" $(NULL_OUT)
}

actions Install
{
    $(CP) $(>) $(<) 
}

# dwa 6/4/01 - modified for boost
actions together Lex
{
    $(LEX) $(LEXFLAGS) $(LEX_OUTPUT)$(<) $(>)
}

# dwa 6/4/01 - modified for boost
actions together LexMv
{
    $(MV) lex.yy.c $(<)
}

actions MkDir1
{
    $(MKDIR) "$(<)"
}

rule Ranlib
{
    Ranlib-action $(<) : $(>) ;
}

rule Ranlib-action
{
    system-Ranlib $(<) : $(>) ;
}

actions together system-Ranlib
{
    $(RANLIB) "$(<)"
}

actions quietly updated piecemeal together RmTemps
{
    $(RM) "$(>)"
}

actions Shell
{
    $(AWK) '
            NR == 1 { print "$(SHELLHEADER)" }
            NR == 1 && /^[#:]/ { next }
            /^##/ { next }
            { print }
    ' < $(>) > $(<)
}

# dwa 6/4/01 - modified for boost
actions together Yacc1
{
    $(YACC) $(YACCFLAGS) $(YACC_OUTPUT)$(<[1]) $(>)
}

# dwa 6/4/01 - modified for boost
actions together YaccMv
{
    $(MV) $(YACCFILES).c $(<[1])
    $(MV) $(YACCFILES).h $(<[2])
}

# dwa 6/4/01 - killed all platform-specific actions for boost

# dwa 6/4/01 - modified for boost
actions together Yacc-fix-line-directives
{
    $(YACC_FIX_LINES) $(<) > $(<)
}