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+# Copyright 2003 Dave Abrahams
+# Copyright 2003, 2005, 2006 Rene Rivera
+# Copyright 2003, 2005, 2006 Vladimir Prus
+# 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)
+
+# First of all, check the jam version
+
+if $(JAM_VERSION:J="") < 030112
+{
+ ECHO "error: Boost.Jam version 3.1.12 or later required" ;
+ EXIT ;
+}
+
+local required-rules = GLOB-RECURSIVELY HAS_NATIVE_RULE ;
+
+for local r in $(required-rules)
+{
+ if ! $(r) in [ RULENAMES ]
+ {
+ ECHO "error: builtin rule '$(r)' is not present" ;
+ ECHO "error: your version of bjam is likely out of date" ;
+ ECHO "error: please get a fresh version from SVN." ;
+ EXIT ;
+ }
+}
+
+local native =
+ regex transform 2
+ ;
+while $(native)
+{
+ if ! [ HAS_NATIVE_RULE $(native[1]) :
+ $(native[2]) :
+ $(native[3]) ]
+ {
+ ECHO "error: missing native rule '$(native[1]).$(native[2])'" ;
+ ECHO "error: or interface version of that rule is too low" ;
+ ECHO "error: your version of bjam is likely out of date" ;
+ ECHO "error: please get a fresh version from SVN." ;
+ EXIT ;
+ }
+ native = $(native[4-]) ;
+}
+
+# Check that the builtin .ENVIRON module is present. We don't have a
+# builtin to check that a module is present, so we assume that the PATH
+# environment variable is always set and verify that the .ENVIRON module
+# has non-empty value of that variable.
+module .ENVIRON
+{
+ local p = $(PATH) $(Path) $(path) ;
+ if ! $(p)
+ {
+ ECHO "error: no builtin module .ENVIRON is found" ;
+ ECHO "error: your version of bjam is likely out of date" ;
+ ECHO "error: please get a fresh version from SVN." ;
+ EXIT ;
+ }
+}
+
+# Check that @() functionality is present. Similarly to modules,
+# we don't have a way to test that directly. Instead we check that
+# $(TMPNAME) functionality is present which was added at roughly
+# the same time (more precisely it was added just before).
+{
+ if ! $(TMPNAME)
+ {
+ ECHO "error: no @() functionality found" ;
+ ECHO "error: your version of bjam is likely out of date" ;
+ ECHO "error: please get a fresh version from SVN." ;
+ EXIT ;
+ }
+}
+
+# Make sure that \n escape is avaiable.
+if "\n" = "n"
+{
+ if $(OS) = CYGWIN
+ {
+ ECHO "warning: escape sequences are not supported" ;
+ ECHO "warning: this will cause major misbehaviour on cygwin" ;
+ ECHO "warning: your version of bjam is likely out of date" ;
+ ECHO "warning: please get a fresh version from SVN." ;
+ }
+}
+
+# Bootstrap the module system. Then bring the import rule into the global module.
+#
+SEARCH on <module@>modules.jam = $(.bootstrap-file:D) ;
+module modules { include <module@>modules.jam ; }
+IMPORT modules : import : : import ;
+
+{
+ # Add module subdirectories to the BOOST_BUILD_PATH, which allows
+ # us to make an incremental refactoring step by moving modules to
+ # the appropriate subdirectories, thereby achieving some physical
+ # separation of different layers without changing all of our code
+ # to specify subdirectories in import statements or use an extra
+ # level of qualification on imported names.
+
+ local subdirs =
+ kernel # only the most-intrinsic modules: modules, errors
+ util # low-level substrate: string/number handling, etc.
+ build # essential elements of the build system architecture
+ tools # toolsets for handling specific build jobs and targets.
+ contrib # user contributed (unreviewed) modules
+ . # build-system.jam lives here
+ ;
+ local whereami = [ NORMALIZE_PATH $(.bootstrap-file:DT) ] ;
+ BOOST_BUILD_PATH += $(whereami:D)/$(subdirs) ;
+
+ modules.poke .ENVIRON : BOOST_BUILD_PATH : $(BOOST_BUILD_PATH) ;
+
+ modules.poke : EXTRA_PYTHONPATH : $(whereami) ;
+}
+
+# Reload the modules, to clean up things. The modules module can tolerate
+# being included twice.
+#
+import modules ;
+
+# Process option plugins first to alow them to prevent loading
+# the rest of the build system.
+#
+import option ;
+local dont-build = [ option.process ] ;
+
+# Should we skip building, i.e. loading the build system, according
+# to the options processed?
+#
+if ! $(dont-build)
+{
+ if ! --python in $(ARGV)
+ {
+ # Allow users to override the build system file from the
+ # command-line (mostly for testing)
+ local build-system = [ MATCH --build-system=(.*) : $(ARGV) ] ;
+ build-system ?= build-system ;
+
+ # Use last element in case of multiple command-line options
+ import $(build-system[-1]) ;
+ }
+ else
+ {
+ ECHO "Boost.Build V2 Python port (experimental)" ;
+
+ # Define additional interface that is exposed to Python code. Python code will
+ # also have access to select bjam builtins in the 'bjam' module, but some
+ # things are easier to define outside C.
+ module python_interface
+ {
+ rule load ( module-name : location )
+ {
+ USER_MODULE $(module-name) ;
+ # Make all rules in the loaded module available in
+ # the global namespace, so that we don't have
+ # to bother specifying "right" module when calling
+ # from Python.
+ module $(module-name)
+ {
+ __name__ = $(1) ;
+ include $(2) ;
+ local rules = [ RULENAMES $(1) ] ;
+ IMPORT $(1) : $(rules) : $(1) : $(1).$(rules) ;
+ }
+ }
+
+ rule peek ( module-name ? : variables + )
+ {
+ module $(<)
+ {
+ return $($(>)) ;
+ }
+ }
+
+ rule set-variable ( module-name : name : value * )
+ {
+ module $(<)
+ {
+ $(>) = $(3) ;
+ }
+ }
+
+ rule set-top-level-targets ( targets * )
+ {
+ DEPENDS all : $(targets) ;
+ }
+
+ rule call-in-module ( m : rulename : * )
+ {
+ module $(m)
+ {
+ return [ $(2) $(3) : $(4) : $(5) : $(6) : $(7) : $(8) : $(9) ] ;
+ }
+ }
+
+
+ rule set-update-action ( action : targets * : sources * : properties * )
+ {
+ $(action) $(targets) : $(sources) : $(properties) ;
+ }
+
+ rule set-update-action-in-module ( m : action : targets * : sources * : properties * )
+ {
+ module $(m)
+ {
+ $(2) $(3) : $(4) : $(5) ;
+ }
+ }
+
+ rule set-target-variable ( targets + : variable : value * : append ? )
+ {
+ if $(append)
+ {
+ $(variable) on $(targets) += $(value) ;
+ }
+ else
+ {
+ $(variable) on $(targets) = $(value) ;
+ }
+ }
+
+ rule get-target-variable ( targets + : variable )
+ {
+ return [ on $(targets) return $($(variable)) ] ;
+ }
+
+ rule import-rules-from-parent ( parent-module : this-module : user-rules * )
+ {
+ IMPORT $(parent-module) : $(user-rules) : $(this-module) : $(user-rules) ;
+ EXPORT $(this-module) : $(user-rules) ;
+ }
+
+ rule mark-included ( targets * : includes * ) {
+ NOCARE $(includes) ;
+ INCLUDES $(targets) : $(includes) ;
+ ISFILE $(includes) ;
+ }
+ }
+
+ PYTHON_IMPORT_RULE bootstrap : bootstrap : PyBB : bootstrap ;
+ modules.poke PyBB : root : [ NORMALIZE_PATH $(.bootstrap-file:DT)/.. ] ;
+
+ module PyBB
+ {
+ local ok = [ bootstrap $(root) ] ;
+ if ! $(ok)
+ {
+ EXIT ;
+ }
+ }
+
+
+ #PYTHON_IMPORT_RULE boost.build.build_system : main : PyBB : main ;
+
+ #module PyBB
+ #{
+ # main ;
+ #}
+
+ }
+}