PmDriver.icl 72.8 KB
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implementation module PmDriver

import StdArray, StdBool, StdList, StdMisc, StdEnum
import StdPSt, StdSystem, StdPStClass, StdTimer
import StdWindow

import UtilNewlinesFile, UtilIO

import IdeState
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from typewin import updateTypeWindow, tw_safe_close, class Typer, :: TypeWinInfo
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from typeatt import typeWinKeyboard, typeWinMouse
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from errwin  import updateErrorWindow, ew_safe_close
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from messwin import showInfo, :: InfoMessage(..)
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from projwin import pm_update_project_window
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import PmCleanSystem
import PmPath
import PmProject
from PmDialogues import doPathsDialog
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import PmAbcMagic
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import PmFileInfo
import PmDirCache
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import interrupt,Platform
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from StdLibMisc import :: Date{..}, :: Time{..}
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//from dodebug import trace_n`
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//import nodebug
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//import dodebug
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trace_n _ g :== g
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trace_n` _ g :== g
//from StdDebug import trace_r
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//--

verboseInfo verbose info ps :== verbi verbose info ps
where
	verbi verbose info ps
		| not verbose && level3 info
			= ps
			= showInfo info ps

	level3 (Level3 _) = True
	level3 _ = False

traceInfo _ ps :== ps
//traceInfo i ps :== showInfo i ps

//--

getFICache` ps
	# (_,ps)	= getFICache ps
	# fi		= FI_EmptyCache
	= (fi,ps)


/*--- TO DO:

system module dependancy analysis is possible...

	ie. when you encounter a system module that must be recompiled then check in done list
	and remove those that depend on this system module and put them back into the todo list

should also be possible to detect cycles... -> generate warning dialogue...

---*/

System			:== "_system"

//--- project manager routines

:: SetMadeProjectFun :== (Bool -> Bool -> Project -> (PSt General) -> PSt General)

//	Compile /Check Syntax of the designated module
CompileProjectModule ::	!CompileOrCheckSyntax !Pathname !Project !SetMadeProjectFun !*(PSt General) -> *(PSt General)
CompileProjectModule compilerOrCheckSyntax path project setproject ps
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	# ps					= ClearCompilerCache` ps
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	# (syspaths,ps)			= getCurrentPaths ps
	# prjpaths				= PR_GetPaths project
	# srcpaths				= AppendLists prjpaths syspaths
	#! (abccache,ps)		= getABCCache ps
	#! (fileinfo,ps)		= getFICache` ps
	#! ((errs,warns,dircache),ps)
							= accFiles (DC_Setup srcpaths) ps
	# ({be_verbose},ps)		= getPrefs ps
	#! ps					= HandleDCErrors be_verbose errs warns ps
	#! (ps,fileinfo,_,abccache,project,ok,newpaths,_,_)
							= CompileTheProjectModule True compilerOrCheckSyntax path fileinfo dircache abccache project ps
	# ps					= setABCCache abccache ps
	# ps					= setFICache fileinfo ps
	= setproject ok newpaths project ps

GenAsmProjectModule :: !.Pathname !Project !SetMadeProjectFun !*(PSt General) -> *(PSt *General)
GenAsmProjectModule path project setproject ps
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	# ps					= ClearCompilerCache` ps
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	# (syspaths,ps)			= getCurrentPaths ps
	# prjpaths				= PR_GetPaths project
	# srcpaths				= AppendLists prjpaths syspaths
	# (abccache,ps)			= getABCCache ps
	#! (fileinfo,ps)		= getFICache` ps
	# ((errs,warns,dircache),ps)
							= accFiles (DC_Setup srcpaths) ps
	# ({be_verbose},ps)		= getPrefs ps
	# ps					= HandleDCErrors be_verbose errs warns ps
	# (ps,fileinfo,_,abccache,project,ok,newpaths,abcpath,_)
							= CompileTheProjectModule True Compilation path fileinfo dircache abccache project ps
	| not ok || newpaths
		# ps				= setABCCache abccache ps
		# ps				= setFICache fileinfo ps
		= setproject True False project ps
	#	(ps,abccache,fileinfo,project,ok,_)
							= GenCodeTheProjectModule True False AsmGeneration abcpath abccache fileinfo project ps
	# ps					= setABCCache abccache ps
	# ps					= setFICache fileinfo ps
	= setproject True ok project ps

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:: CleanupCont :== Pathname Bool Bool *(PSt *General) -> *(PSt *General)
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BringProjectUptoDate :: !Bool CleanupCont !*(PSt *General) -> *PSt *General
BringProjectUptoDate force continuation ps
	#  (project,ps)		= getProject ps

	#	ps				= ew_safe_close ps							// close error window
	#	ps				= tw_safe_close ps							// close types window

	#	ps				= PrecompileFase project ps

	#	ps				= showInfo (Level1 "Bring up to date...") ps
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	#	ps				= ClearCompilerCache` ps
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	#!	(intr_info,ps) 	= getInterrupt ps
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//		(interact,ps) 	= getInteract ps
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		ini_step		= DInit force project cleanup
	#	ps				= StartIntr intr_info ini_step step ps
	= ps
where
	PrecompileFase project ps
		# (precompile,project)	= PR_GetPrecompile project
		| isJust precompile
			# ps				= showInfo (Level1 "Precompile...") ps
			# (ok,ec,ps)		= Execute` (fromJust precompile) ps
			// error handling???
			= trace_n ("PRE",ok,ec) ps
		= trace_n "NO-PRE" ps
	
	PostlinkFase project ps
		# (postlink,project)	= PR_GetPostlink project
		| isJust postlink
			# ps				= showInfo (Level1 "Postlink...") ps
			# (ok,ec,ps)		= Execute` (fromJust postlink) ps
			= ps
		= ps
	
	cleanup :: !Bool !Bool !Bool !FileInfoCache !StaticLibInfo !(List Modulename) !Project !Bool (!*ABCCache,!(PSt *General)) -> *(!*DriverState,!PSt *General)
	cleanup ok newpaths linked fileinfo libsinfo modpaths project intr (abccache,ps)
		| newpaths && not intr		// if paths have changed -> try again
			# ps			= showInfo (Level1 "Paths have changed: remaking.") ps
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			# ps			= ClearCompilerCache` ps
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			= MakeTheProject False fileinfo libsinfo abccache project cleanup` ps

		# ps				= PostlinkFase project ps
		
		# ps				= showInfo (Level1 "Finished making.") ps
		# ps				= setProject project ps
		# ps				= setABCCache abccache ps
		# ps				= setFICache fileinfo ps
		# ps				= pm_update_project_window ps
		# path				= PR_GetExecPath project
		= stop (DDone,continuation path linked ok ps)
	
	cleanup` :: MTPContinuation
	cleanup` = cleanup

//-- Private stuff

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:: MTPContinuation :== Bool Bool Bool FileInfoCache StaticLibInfo (List Modulename) Project Bool *(*ABCCache,(PSt *General)) -> *(*DriverState,PSt *General)
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MakeTheProject :: !Bool !FileInfoCache !StaticLibInfo !*ABCCache !Project !MTPContinuation !(PSt General) -> (!*DriverState,!PSt General)
MakeTheProject force fileinfo libsinfo abccache project continue ps
	# (syspaths,ps)			= getCurrentPaths ps
	# prjpaths				= PR_GetPaths project
	# srcpaths				= AppendLists prjpaths syspaths
	# ((errs,warns,dircache),ps)
							= accFiles (DC_Setup srcpaths) ps
	# ({be_verbose},ps)		= getPrefs ps
	# ps					= HandleDCErrors be_verbose errs warns ps
	# (root,project)		= PR_GetRootPathName project
	# root					= MakeDefPathname root	// avoid double compilation...
	# inidone				= Nil
	# (env_static_libs,ps)	= getCurrentSlibs ps
	# sfiles				= (StrictListToList(Concat (SL_Libs libsinfo) env_static_libs))
	# (err,ps)				= check_exists sfiles ps
	| isJust err
		# line				= Level3 ["Error: Unable to find static library: '" +++ fromJust err +++ "'."]
		# ps				= showInfo line ps
		= continue False False False fileinfo libsinfo Nil project False (abccache, ps)
	# ((errs,slibs),ps)		= accFiles (getLibs sfiles) ps
	| not (isEmpty errs)
		# line				= Level3 ["Error: Failed reading static libraries: '" :errs]
		# ps				= showInfo line ps
		= continue False False False fileinfo libsinfo Nil project False (abccache, ps)
	# slibs					= ListToStrictList slibs
	# libsinfo				= SL_SetDcls slibs libsinfo
	# ps					= showInfo (Level1 "Compiling...") ps
	# rest					= root :! Nil
	# (method,ps)			= getCurrentMeth ps
	# compinfo = case method of
				CompileSync			-> Sync
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				(CompileAsync cmax)	-> PlatformDependant
										(AsyncWin cmax [])								// win
										(Async [] cmax 0 NoUnknownFinishedProcessors)	// mac
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				CompilePers			-> Pers InitCompilingInfo
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	# ds = 
		{ project	= project
		, continue	= continue
		, fileinfo	= fileinfo
		, abccache	= abccache
		, libsinfo	= libsinfo
		, ok		= True
		, newpaths	= False
		, modpaths	= inidone
		}
	= step False (DComp force dircache compinfo rest ds) ps
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where
	check_exists [] ps = (Nothing,ps)
	check_exists [file:rest] ps
		# (ok,ps) = accFiles (FExists file) ps
		| ok = check_exists rest ps
		= (Just file,ps)

:: CurrentlyCompiled =
	{ iclModule	:: !String
	, options	:: CompilerOptions
	, slot		:: !Int
	}

//--

cont :: !*(.a,*(PSt *General)) -> *(.a,*(PSt *General));
cont (ls,ps)
	# (intr_info,ps) 	= getInterrupt ps
	# ps				= ContIntr intr_info ps
	= (ls,ps)

stop :: !*(.a,*(PSt *General)) -> *(.a,*(PSt *General));
stop (ls,ps)
	# (intr_info,ps) 	= getInterrupt ps
	# ps				= StopIntr intr_info ps
	= (ls,ps)

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step :: !Bool !*DriverState !*(PSt General) -> (!*DriverState,!*(PSt General))
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step intr (DInit force project setproject) ps
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//	# ps				= showInfo (Level1 "Make the project...") ps
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	# libsinfo			= PR_GetStaticLibsInfo project
	# (abccache,ps)		= getABCCache ps
	# (fileinfo,ps)		= getFICache` ps
	= MakeTheProject force fileinfo libsinfo abccache project setproject ps

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step True (DComp force dircache (Pers inf) rest ds) ps
	# ds			= {ds & ok = False}
	# (paths,ds)	= ds!modpaths
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	// compile phase finished: kill clean compiler
	# (_,ps)				= ExitCleanCompiler (inf,ps)
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	= step True (DGene paths SyncCodeGeneration ds) ps
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step True (DComp force dircache compinfo rest ds) ps
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	// need async cocl shootdown as well..
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	# ds			= {ds & ok = False}
	# (paths,ds)	= ds!modpaths
	= step True (DGene paths SyncCodeGeneration ds) ps
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step intr (DComp force dircache Sync Nil ds) ps
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	// compile phase finished: remove all modules not (indirectly) imported by main module
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	# project				= PR_SetBuilt ds.modpaths ds.project	// removes unused modules
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	# (modpaths,project)	= PR_GetModulenames True IclMod project
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	# ds					= {ds & modpaths = modpaths, project = project}
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	# ps					= showInfo (Level1 "Generating...") ps
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	# (paths,ds)			= ds!modpaths
	= step intr (DGene paths SyncCodeGeneration ds) ps
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step intr (DComp force dircache Sync (next :! rest) ds) ps
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	// compile phase: check module 'next'
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	| StringOccurs next ds.modpaths
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		// if already done then skip
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		= step intr (DComp force dircache Sync rest ds) ps
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	# modname					= GetModuleName next
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	| isProjLibraryModule modname ds.libsinfo
		// instead of testing explicitly put libmodules in done <= conflicts with other administration
		= step intr (DComp force dircache Sync rest ds) ps
	# (ps,dircache,ok,newpaths`,rest,compinfo,ds,_)
							= UpdateDependencies force next rest Sync dircache ds ps
	# ds	= {ds & newpaths = ds.newpaths || newpaths`, ok = ok}
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	| not ok
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		# (paths,ds)		= ds!modpaths
		= step intr (DGene paths SyncCodeGeneration ds) ps
	# ds	= {ds & modpaths = next :! ds.modpaths}
	= cont (DComp force dircache compinfo rest ds,ps)
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step intr (DComp force dircache (Pers inf) Nil ds) ps
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	// compile phase finished: kill clean compiler
	# (_,ps)				= ExitCleanCompiler (inf,ps)
	// compile phase finished: remove all modules not (indirectly) imported by main module
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	# project				= PR_SetBuilt ds.modpaths ds.project	// removes unused modules
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	# (modpaths,project)	= PR_GetModulenames True IclMod project
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	# ds					= {ds & modpaths = modpaths, project = project}
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	# ps					= showInfo (Level1 "Generating...") ps
//XXX	= step intr (DGene True newpaths fileinfo libsinfo modpaths modpaths abccache project setproject) ps
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	# (paths,ds)			= ds!modpaths
	= step intr (DGene paths SyncCodeGeneration ds) ps
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step intr (DComp force dircache compinfo=:(Pers _) (next :! rest) ds) ps
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	// compile phase: check module 'next'
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	# ps = trace_n ("comp step",next) ps
	| StringOccurs next ds.modpaths
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		// if already done then skip
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		= step intr (DComp force dircache compinfo rest ds) ps
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	# modname					= GetModuleName next
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	| isProjLibraryModule modname ds.libsinfo
		// instead of testing explicitly put libmodules in done <= conflicts with other administration
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		= step intr (DComp force dircache compinfo rest ds) ps
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	# ps = trace_n ("update",next) ps
	# (ps,dircache,ok,newpaths`,rest,compinfo,ds,_)
							= UpdateDependencies force next rest compinfo dircache ds ps
	# ds	= {ds & newpaths = ds.newpaths || newpaths`, ok = ok}
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	| not ok
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		# (Pers inf)		= compinfo
		# (_,ps)			= trace_n "exit compiler!" ExitCleanCompiler (inf,ps)
		# (paths,ds)		= ds!modpaths
		= step intr (DGene paths SyncCodeGeneration ds) ps
	# ds	= {ds & modpaths = next :! ds.modpaths}
	= cont (DComp force dircache compinfo rest ds,ps)
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step intr (DComp force dircache (Async [] max_n_processes n_used_processors NoUnknownFinishedProcessors) Nil ds) ps
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	// compile phase finished: remove all modules not (indirectly) imported by main module
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	# project				= PR_SetBuilt ds.modpaths ds.project	// removes unused modules
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	# (modpaths,project)	= PR_GetModulenames True IclMod project
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	# ds					= {ds & modpaths = modpaths, project = project}
	# (os_error,ps)			= ClearCompilerCaches n_used_processors ps;
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	# ps					= showInfo (Level1 "Generating...") ps
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	# (paths,ds)			= ds!modpaths
	= step intr (DGene paths (ASyncCodeGeneration [] max_n_processes NoUnknownFinishedProcessors) ds) ps
step intr (DComp force dircache (AsyncWin _ []) Nil ds) ps
	// compile phase finished: remove all modules not (indirectly) imported by main module
	# project				= PR_SetBuilt ds.modpaths ds.project	// removes unused modules
	# (modpaths,project)	= PR_GetModulenames True IclMod project
	# ds					= {ds & modpaths = modpaths, project = project}
//	# (os_error,ps)			= ClearCompilerCaches n_used_processors ps;
	# ps					= showInfo (Level1 "Generating...") ps
	# (paths,ds)			= ds!modpaths
	= step intr (DGene paths SyncCodeGeneration ds) ps
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step intr state=:(DComp force _ (Async _ _ _ _) _ _) ps
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	# ps					= traceInfo (Level3 ["check_completed..."]) ps
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	# (state, ps)			= check_completed state ps
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	# ps					= traceInfo (Level3 ["start_compilations..."]) ps
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	# (state, ps)			= start_compilations state ps
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	= cont (state, ps)
	where
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		check_completed :: !*DriverState !*(PSt General) -> (!*DriverState,!*PSt General)
		check_completed state=:(DComp force _ (Async current=:[_:_] cmax _ _) _ _)  ps
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			= case (CompilePollCompleted ps) of
				(NoFinishedCompiler,ps)
					-> check_unknow_processors_are_known state ps
				(UnknownFinishedCompiler,ps)
					-> case state of
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						DComp force dircache (Async current cmax n_used_processors unknown_finished_processors) todo ds
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							# unknown_finished_processors = add_unknown_finished_processor unknown_finished_processors
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							# state = DComp force dircache (Async current cmax n_used_processors unknown_finished_processors) todo ds
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							-> check_completed state ps
				(FinishedCompiler completedSlot exitcode,ps)
					# ps = traceInfo (Level3 ["process_completed...",toString completedSlot,toString exitcode]) ps
					#! (state,ps) = process_completed completedSlot exitcode state ps
					-> check_completed state ps
		check_completed state ps
			= check_unknow_processors_are_known state ps

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		check_unknow_processors_are_known (DComp force dircache (Async current cmax n_used_processors (UnknownFinishedProcessors n_unknown_finished_processors known_finished_processors)) todo ds) ps
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			| n_unknown_finished_processors+length known_finished_processors>=cmax
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				# state = DComp force dircache (Async current cmax n_used_processors NoUnknownFinishedProcessors) todo ds
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				# (state,ps) = handle_completed_processes 0 state ps
					with
						handle_completed_processes process_n state ps
							| process_n>=cmax
								= (state,ps)
							| isMember process_n known_finished_processors
								= handle_completed_processes (process_n+1) state ps
								# (_,ps) = SendRepeatResult process_n ps
								/*
								# exitcode = 1
								# ps = traceInfo (Level3 ["process_completed...",toString process_n,toString exitcode]) ps
								#! (state,ps) = process_completed process_n exitcode state ps
								*/
								= handle_completed_processes (process_n+1) state ps								
				= (state, ps)
		check_unknow_processors_are_known state ps
			=	(state, ps)

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		process_completed :: !Int !Int !*DriverState !*(PSt General) -> (!*DriverState,!*PSt General)
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		process_completed completedSlot exitcode (DComp force dircache (Async current cmax n_used_processors unknown_finished_processors) todo ds) ps
			# (completed, current)			= removeFromCurrent completedSlot current
			# unknown_finished_processors	= remove_from_unknown_finished_processors completedSlot unknown_finished_processors
			# (startupdir,ps)				= getStup ps
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			  typewin						= updateTypeWindow True (GetModuleName completed.iclModule) [typeWinKeyboard, typeWinMouse]
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			# ccstring						= "dummy ccstring for now.."
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			# (abcpath,res,ps)				= CompileHandleExitCode exitcode ccstring startupdir completedSlot updateErrorWindow typewin 
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												completed.iclModule completed.options.listTypes ps // types param
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			# (_,(ps,fileinfo,dircache,abccache,project,ok,newpaths`,_,deps))
											= ProcessCompilerMsg Nothing Compilation completed.options completed.iclModule abcpath res ds.fileinfo dircache ds.abccache ds.project ps
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			# ds							= {ds & newpaths = ds.newpaths || newpaths`, fileinfo = fileinfo, abccache = abccache, project = project, ok = ok}
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			| ok
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				# ds						= {ds & modpaths = completed.iclModule :! ds.modpaths}
				= (DComp force dircache (Async current cmax n_used_processors unknown_finished_processors) (Concat deps todo) ds, ps)
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			// not ok
				# (os_error,ps) = ClearCompilerCaches n_used_processors ps;
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				# (paths,ds)	= ds!modpaths
				= (DGene paths SyncCodeGeneration ds, ps)
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			where
				removeFromCurrent :: Int [CurrentlyCompiled] -> (CurrentlyCompiled, [CurrentlyCompiled])
				removeFromCurrent _ []
					=	abort "driver.icl: unknown threadId"
				removeFromCurrent completedSlot [current=:{slot} : rest]
					| completedSlot == slot
						=	(current, rest)
					// otherwise
						# (completed, rest) = removeFromCurrent completedSlot rest
						= (completed, [current : rest])

		start_compilations :: !*DriverState !*(PSt General) -> (!*DriverState,!*PSt General)
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		start_compilations state=:(DComp force dircache (Async current cmax n_used_processors unknown_finished_processors) (next :! rest) ds) ps
			// all threads used?
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			| length current >= cmax
				= (state, ps)
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			// compile phase: check module 'next'
			| StringOccurs next ds.modpaths || currently_compiled next current
				= start_compilations (DComp force dircache (Async current cmax n_used_processors unknown_finished_processors) rest ds) ps
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			# modname = GetModuleName next
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			| isProjLibraryModule modname ds.libsinfo
				// instead of testing explicitly put libmodules in done <= conflicts with other administration
				= (DComp force dircache (Async current cmax n_used_processors unknown_finished_processors) rest ds, ps)
			# (ps,dircache,ok,_,rest,compinfo,ds,_)
				= UpdateDependencies force next rest (Async current cmax n_used_processors unknown_finished_processors) dircache ds ps
			# ds = {ds & ok = ok}
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			| not ok
				# (os_error,ps) = ClearCompilerCaches n_used_processors ps;
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				#! (paths,ds)	= ds!modpaths
				= (DGene paths SyncCodeGeneration ds, ps)
			= start_compilations (DComp force dircache compinfo rest ds) ps
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		start_compilations state ps
//			# ps = traceInfo (Level3 ["start_compilations no next..."]) ps
			= (state, ps)

		currently_compiled :: String [CurrentlyCompiled] -> Bool
		currently_compiled next current
			=	or [c.iclModule == next \\ c <- current]

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/*XXX
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step intr state=:(DComp force dircache compinfo=:(AsyncWin _ _) rest ds) ps
	# ps					= traceInfo (Level3 ["check_completed..."]) ps
	# (state, ps) = check_completed state ps
	# ps					= traceInfo (Level3 ["start_compilations..."]) ps
	# (state, ps) = start_compilations state ps
	= cont (state, ps)
	where
		check_completed :: !*DriverState !*(PSt General) -> !(!*DriverState,!*PSt General)
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		check_completed state=:(DComp _ _ (AsyncWin cmax current=:[_:_]) _ _)  ps
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			=	case (CompilePollCompleted ps) of
					(NoFinishedCompiler, ps)
						-> (state, ps)
					(FinishedCompiler completedSlot exitcode, ps)
						#! (state,ps) = process_completed completedSlot exitcode state ps
						-> check_completed state ps
					(UnknownFinishedCompiler,ps)
						-> (state, ps)	// -> doesn't occur on win
		check_completed state ps
			=	(state, ps)

		process_completed :: !Int !Int !*DriverState !*(PSt General) -> !(!*DriverState,!*PSt General)
		process_completed completedSlot exitcode (DComp force dircache (AsyncWin cmax current) todo ds) ps
			# (completed, current)	= removeFromCurrent completedSlot current
			# (startupdir,ps)		= getStup ps
			  typewin				= updateTypeWindow (GetModuleName completed.iclModule) [typeWinKeyboard, typeWinMouse]
			# ccstring				= "dummy ccstring for now.."
			# (ps,abcpath,res)		= CompileHandleExitCode exitcode ccstring startupdir completedSlot updateErrorWindow typewin 
										completed.iclModule completed.options.listTypes ps // types param
			# (ps,fileinfo,dircache,abccache,project,ok,newpaths`,_,deps)
									= ProcessCompilerMsg Compilation completed.options completed.iclModule abcpath res ds.fileinfo dircache ds.abccache ds.project ps
			# ds					= {ds & newpaths = ds.newpaths || newpaths`, fileinfo = fileinfo, abccache = abccache, project = project, ok = ok}
			| ok
				# ds						= {ds & modpaths = completed.iclModule :! ds.modpaths}
				= (DComp force dircache (AsyncWin cmax current) (Concat deps todo) ds, ps)
			// not ok
				# (paths,ds)	= ds!modpaths
				= (DGene paths SyncCodeGeneration ds, ps)
			where
				removeFromCurrent :: Int [CurrentlyCompiled] -> (CurrentlyCompiled, [CurrentlyCompiled])
				removeFromCurrent _ []
					=	abort "driver.icl: unknown threadId"
				removeFromCurrent completedSlot [current=:{slot} : rest]
					| completedSlot == slot
						=	(current, rest)
					// otherwise
						# (completed, rest) = removeFromCurrent completedSlot rest
						= (completed, [current : rest])

		start_compilations :: !*DriverState !*(PSt General) -> (!*DriverState,!*PSt General)
		start_compilations state=:(DComp force dircache (AsyncWin cmax current) (next :! rest) ds) ps
			| length current >= cmax
				= (state, ps)
		// compile phase: check module 'next'
			| StringOccurs next ds.modpaths || currently_compiled next current
				= start_compilations (DComp force dircache (AsyncWin cmax current) rest ds) ps
			# modname = GetModuleName next
			| isProjLibraryModule modname ds.libsinfo
				// instead of testing explicitly put libmodules in done <= conflicts with other administration
				= (DComp force dircache (AsyncWin cmax current) rest ds, ps)
			# (ps,dircache,ok,_,rest,compinfo,ds,_)
				= UpdateDependencies force next rest (AsyncWin cmax current) dircache ds ps
			# ds = {ds & ok = ok}
			| not ok
				#! (paths,ds)	= ds!modpaths
				= (DGene paths SyncCodeGeneration ds, ps)
			= start_compilations (DComp force dircache compinfo rest ds) ps
		start_compilations state ps
			= (state, ps)

		currently_compiled :: String [CurrentlyCompiled] -> Bool
		currently_compiled next current
			=	or [c.iclModule == next \\ c <- current]
*/
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step intr (DGene Nil SyncCodeGeneration ds) ps
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	#! ps	= showInfo (Level1 "Linking...") ps
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	= step intr (DLink ds) ps
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step intr (DGene Nil (ASyncCodeGeneration [] _ NoUnknownFinishedProcessors) ds) ps
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	#! ps	= showInfo (Level1 "Linking...") ps
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	= step intr (DLink ds) ps
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step intr (DGene (path:!rest) SyncCodeGeneration ds) ps
	| not ds.ok || intr
		# ds = {ds & ok = False}
		= step intr (DLink ds) ps
	# (ps,abccache,fileinfo,gen,abcpath)	= CheckABCOutOfDate False path ds.abccache ds.fileinfo ds.project ps
	# (ps,abccache,fileinfo,project,ok,_)	= GenCodeTheProjectModule gen False CodeGeneration abcpath abccache fileinfo ds.project ps
	# ds = {ds & abccache = abccache, fileinfo = fileinfo, project = project, ok = ok}
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	| not ok
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		= step intr (DLink ds) ps
	= cont (DGene rest SyncCodeGeneration ds, ps)
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step intr (DGene paths (ASyncCodeGeneration busy_processes max_n_processes unknown_finished_processors) ds) ps
	# (ok,busy_processes,unknown_finished_processors,project,fileinfo,ps)
		= handle_finished_code_generators busy_processes unknown_finished_processors ds.project ds.fileinfo ps
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		with
			handle_finished_code_generators busy_processes=:[_:_] unknown_finished_processors project fileinfo ps
				= case (CompilePollCompleted ps) of
					(NoFinishedCompiler, ps)
						-> check_unknow_processors_are_known busy_processes unknown_finished_processors project fileinfo ps
					(UnknownFinishedCompiler,ps)
						# unknown_finished_processors = add_unknown_finished_processor unknown_finished_processors
						-> (True,busy_processes,unknown_finished_processors,project,fileinfo,ps)
					(FinishedCompiler finished_cg_slot_n exit_code, ps)
//						# ps  = trace ("code generator finished "+++toString finished_cg_slot_n+++" "+++toString exit_code+++"\n") ps
//						# ps  = trace ("f "+++toString finished_cg_slot_n+++" "+++toString exit_code+++" ") ps

						# unknown_finished_processors = remove_from_unknown_finished_processors finished_cg_slot_n unknown_finished_processors
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						# (abc_path,obj_path,busy_processes) = get_paths_and_remove_process_from_list finished_cg_slot_n busy_processes
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							with
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								get_paths_and_remove_process_from_list finished_cg_slot_n [busy_process=:(slot,abc_path,obj_path) : rest]
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									| finished_cg_slot_n==slot
										= (abc_path,obj_path,rest)
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										# (abc_path,obj_path,rest) = get_paths_and_remove_process_from_list finished_cg_slot_n rest
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										= (abc_path,obj_path,[busy_process:rest])
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								get_paths_and_remove_process_from_list finished_cg_slot_n []
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									= abort "driver.icl: unknown code generator id"
						| exit_code==0
							# (fileinfo,ps) = accFiles (FI_UpdateObjDate abc_path obj_path fileinfo) ps
							# project = PR_SetCodeGenerated (GetModuleName abc_path) project
							-> handle_finished_code_generators busy_processes unknown_finished_processors project fileinfo ps
							-> (False,busy_processes,unknown_finished_processors,project,fileinfo,ps)
			handle_finished_code_generators [] unknown_finished_processors project fileinfo ps
				= check_unknow_processors_are_known [] unknown_finished_processors project fileinfo ps

			check_unknow_processors_are_known busy_processes (UnknownFinishedProcessors n_unknown_finished_processors known_finished_processors) project fileinfo ps
				| n_unknown_finished_processors+length known_finished_processors>=max_n_processes
					# (busy_processes,project,fileinfo,ps) = handle_completed_processes 0 busy_processes project fileinfo ps
						with
							handle_completed_processes process_n busy_processes project fileinfo ps
								| process_n>=max_n_processes
									= (busy_processes,project,fileinfo,ps)
								| isMember process_n known_finished_processors
									= handle_completed_processes (process_n+1) busy_processes project fileinfo ps
									# (_,ps) = SendRepeatResult process_n ps
									/*
									# unknown_finished_processors = remove_from_unknown_finished_processors finished_cg_slot_n unknown_finished_processors
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									# (abc_path,obj_path,busy_processes) = get_paths_and_remove_process_from_list finished_cg_slot_n busy_processes
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										with
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											get_paths_and_remove_process_from_list finished_cg_slot_n [busy_process=:(slot,abc_path,obj_path) : rest]
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												| process_n==slot
													= (abc_path,obj_path,rest)
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													# (abc_path,obj_path,rest) = get_paths_and_remove_process_from_list finished_cg_slot_n rest
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													= (abc_path,obj_path,[busy_process:rest])
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											get_paths_and_remove_process_from_list finished_cg_slot_n []
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												= abort "driver.icl: unknown code generator id"
									# (fileinfo,ps) = accFiles (FI_UpdateObjDate abc_path obj_path fileinfo) ps
									# project = PR_SetCodeGenerated (GetModuleName abc_path) project
									*/
									= handle_completed_processes (process_n+1) busy_processes project fileinfo ps								
					= (True,busy_processes,NoUnknownFinishedProcessors,project,fileinfo,ps)
			check_unknow_processors_are_known busy_processes unknown_finished_processors project fileinfo ps
				= (True,busy_processes,unknown_finished_processors,project,fileinfo,ps)
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	# ds = {ds & fileinfo = fileinfo, project = project, ok = ds.ok && ok && not intr}
	| not ds.ok
		= cont (DGene paths (ASyncCodeGeneration busy_processes max_n_processes unknown_finished_processors) ds,ps)
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	| length busy_processes>=max_n_processes || (case paths of Nil -> True ; _ -> False)
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		= cont (DGene paths (ASyncCodeGeneration busy_processes max_n_processes unknown_finished_processors) ds,ps)
	# (ok,paths,busy_processes,fileinfo,abccache,ps) = start_code_generators paths busy_processes ds.fileinfo ds.abccache ps
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		with
			start_code_generators paths=:(path :! rest) busy_processes fileinfo abccache ps
				| length busy_processes>=max_n_processes
					= (True,paths,busy_processes,fileinfo,abccache,ps)
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				# (ps,abccache,fileinfo,gen,abc_path)
									= CheckABCOutOfDate False path abccache fileinfo project ps
				# cgo				= PR_GetCodeGenOptions project
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				# (proc,ps)			= getCurrentProc ps
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				# ((abccache,fileinfo,info), ps)
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									= FI_GetFileInfo proc abc_path abccache fileinfo ps
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				| not gen
					= start_code_generators rest busy_processes fileinfo abccache ps
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				# ps				= showInfo (Level2 (
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													(foldl (+++) ("Generating code for "
																	+++ RemovePath abc_path) [" "+++RemovePath abc_path \\ (_,abc_path,_)<-busy_processes])
													)) ps
				# (startupdir,ps)	= getStup ps
				# (cgen,ps)			= getCurrentCgen ps
				# ao				= PR_GetApplicationOptions project
				# (prefs,ps)		= getPrefs ps
				# defaultCO			= prefs.compopts
				# modname			= GetModuleName abc_path
				# co				= case (PR_GetModuleInfo modname project) of
										Just modinfo	-> modinfo.compilerOptions
										_				-> defaultCO
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				# timeprofile		= ao.profiling && (not co.neverTimeProfile)
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				# free_slot			= hd (removeMembers [0..max_n_processes-1] [slot \\ (slot,_,_) <- busy_processes])				

//				# ps  = trace ("code generator started "+++toString free_slot+++"\n") ps
//				# ps  = trace ("s "+++toString free_slot+++" ") ps

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				# (res,obj_path,_,ps) = StartCodeGenerator cgen updateErrorWindow CodeGeneration abc_path free_slot timeprofile cgo proc ao startupdir NoCompilerProcessIds ps
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				| not res				
					= (False,rest,busy_processes,fileinfo,abccache,ps)
				# busy_processes	= [(free_slot,abc_path,obj_path):busy_processes]
				= start_code_generators rest busy_processes fileinfo abccache ps
			start_code_generators Nil busy_processes fileinfo abccache ps
				= (True,Nil,busy_processes,fileinfo,abccache,ps)
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	# ds = {ds & fileinfo = fileinfo, abccache = abccache, ok = ok}
	= cont (DGene paths (ASyncCodeGeneration busy_processes max_n_processes unknown_finished_processors) ds, ps)
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step intr (DLink ds=:{ok, newpaths, fileinfo, libsinfo, modpaths, abccache, project, continue}) ps
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	//	Check whether executable is out of date and relink it	if required.
	| intr || not ok
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		= continue False newpaths False fileinfo libsinfo modpaths project intr (abccache, ps)
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	# lo						= PR_GetLinkOptions project
	# (prj_path,ps)				= getPath ps
	# (app_path,ps)				= getStup ps
	# (defpaths,ps)				= getCurrentPaths ps
	# prjpaths					= PR_GetPaths project
	# srcpaths					= AppendLists prjpaths defpaths

	// set up dircache for 'Clean System Files'
	# ((errs,warns,abcPathsCache),ps)	= accFiles (DC_Setup (Map MakeSystemPathname srcpaths)) ps
	// need to handle this differently? Now barfs on paths without Clean System File subdirs
	// maybe use variant DC_Setup which ignores nonexistent CSF-dirs...
	# ({be_verbose},ps)			= getPrefs ps
	# ps						= HandleDCErrors be_verbose errs warns ps
	# (ok,full_sys0,_,abcPathsCache) = DC_Search (MakeABCPathname System) abcPathsCache
	# full_sys					= full_sys0 +++ {dirseparator} +++ (MakeABCPathname System)
	# full_sys`					= MakeImpPathname full_sys
	
	# ao						= PR_GetApplicationOptions project
	// possibly patch _system to correct profiling settings...

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//	# tp						= PR_GetProcessor project
	# (tp,ps)					= getCurrentProc ps
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	# ((abccache,fileinfo,modinfo),ps)
								= FI_GetFileInfo tp  full_sys` abccache fileinfo ps
	
	# wantstp					= ao.profiling //&& (not co.neverTimeProfile)
	# compile					= /*mp <> info.abcOptions.abcMemoryProfile ||*/ wantstp <> modinfo.abcOptions.abcTimeProfile
	# lines						= if (be_verbose && compile)
									(Level3 ["["+++(MakeABCPathname System)+++",]: compiled with different options"])
									(Level3 [])
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	# ps						= verboseInfo be_verbose lines ps
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	# (version,ps)				= getCurrentVers ps
	# (patched, ps)				= accFiles (PatchSystemABC version compile full_sys /*ao.memoryProfiling*/ wantstp) ps
	| not patched
		# line					= Level3 ["Error: ["+++(MakeABCPathname System)+++",]: could not be patched."]
		# ps					= showInfo line ps
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		= continue False newpaths False fileinfo libsinfo modpaths project intr (abccache, ps)
	# ((abcdate,fileinfo), ps)	= accFiles (FI_UpdateAbcDate full_sys` full_sys wantstp fileinfo) ps
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	# (ps,abccache,fileinfo,genabc,abcpath)
								// check _system module out of date
								= CheckABCOutOfDate True full_sys` abccache fileinfo project ps
	# (ps,abccache,fileinfo,project,ok,system_obj_path)
								// if out of date regenerate
								= GenCodeTheProjectModule genabc True CodeGeneration abcpath abccache fileinfo project ps
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	# (sys_date, ps)			= accFiles (FModified full_sys) ps
	# sys_obj					= full_sys0 +++ {dirseparator} +++ (MakeObjPathname tp System)
	# (sys_obj_date,ps)			= accFiles (FModified sys_obj) ps
	# sys_obj_date_time			= DATEtoDateTime sys_obj_date
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	# (abcPathsCache,ps)		= case genabc of
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									True
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										-> (DC_Update ((MakeObjPathname tp System),full_sys0,sys_obj_date_time) abcPathsCache,ps)
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												// need to check if line above actually works now...
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									False
										-> (abcPathsCache,ps)
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	| not ok
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		= continue False newpaths False fileinfo libsinfo modpaths project intr (abccache, ps)
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	# ((ok,_,_,_,sys_objs,sys_libs,abccache),ps)
								= accFiles (ParseABCDependencies` abcpath sys_date abccache) ps
	| not ok
		# line					= Level3 ["Error: ["+++(MakeABCPathname System)+++",]: could not be analysed."]
		# ps					= showInfo line ps
		= continue False newpaths False fileinfo libsinfo modpaths project intr (abccache, ps)
	
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	# prj_path`					= RemoveFilename prj_path
	# execpath					= PR_GetExecPath project
	# execpath					= fulPath app_path prj_path` execpath
	# ps						= showInfo (Level2 ("Linking '" +++ RemovePath execpath +++ "'")) ps
	
	// runtime objects and dynamic libs
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	# stdl						= Concat sys_libs (standardStaticLibraries tp lo.method)
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	# stdo						= Concat sys_objs (standardObjectFiles ao.stack_traces ao.profiling tp)
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	# (stdoOk,ofiles,abcPathsCache)
								= case ao.standard_rte of
									True	-> GetPathNames stdo Nil abcPathsCache
									False	-> (True,Nil,abcPathsCache)
	# (stdlOk,lfiles,abcPathsCache)
								= case ao.standard_rte of
									True	-> GetPathNames stdl Nil abcPathsCache
									False	-> (True,Nil,abcPathsCache)
	| not stdoOk
		# line					= Level3 ["Link error: File: '" +++ (Head ofiles) +++ "' not found."]
		# ps					= showInfo line ps
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		= continue False newpaths False fileinfo libsinfo modpaths project intr (abccache, ps)
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	| not stdlOk
		# line					= Level3 ["Link error: File: '" +++ (Head lfiles) +++ "' not found."]
		# ps					= showInfo line ps
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		= continue False newpaths False fileinfo libsinfo modpaths project intr (abccache, ps)
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	// environment objects and dynamic libs
	# (deflibs,ps)				= getCurrentDlibs ps
	# (defobjs,ps)				= getCurrentObjts ps
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	# ofiles					= Concat defobjs ofiles
	# lfiles					= Concat deflibs lfiles
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/* NO: these are stored with full path so need different approach???
	# (defobjsOk,defobjs,abcPathsCache)
								= GetPathNames defobjs Nil abcPathsCache
	# (deflibsOk,deflibs,abcPathsCache)
								= GetPathNames deflibs Nil abcPathsCache
	| not defobjsOk
		# line					= Level3 ["Link error: File: '" +++ (Head defobjs) +++ "' not found."]
		# ps					= showInfo line ps
		= continue False newpaths False fileinfo libsinfo abccache modpaths project intr ps
	| not deflibsOk
		# line					= Level3 ["Link error: File: '" +++ (Head deflibs) +++ "' not found."]
		# ps					= showInfo line ps
		= continue False newpaths False fileinfo libsinfo abccache modpaths project intr ps
*/

	// clean modules
	# (clmodpaths,fileinfo)		= FI_GetCleanModules system_obj_path libsinfo fileinfo
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	// why couldn't we use ds.modpaths above??? No we need to do trickery to ensure main module is first!
	# (rootpath,project)		= PR_GetRootPathName project
	# rootpath					= MakeObjSystemPathname tp rootpath 
	# clmodpaths				= RemoveStringFromList rootpath clmodpaths
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	# ofiles` = ofiles
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	# ofiles					= rootpath :! ofiles
	
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	# ofiles					= Reverse2 clmodpaths ofiles
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	// module imported objects and dynamic libs
	# abcLinkInfo				= PR_GetABCLinkInfo project
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	# linkObjFileNames			= Map fix abcLinkInfo.linkObjFileNames
									with
										fix s
											| s.[size s - 1] == '.'
												= MakeObjPathname tp s
												= s
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	# (objPathsOk,ofiles,abcPathsCache)
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								= GetPathNames linkObjFileNames ofiles abcPathsCache
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	# (_,ofiles`,abcPathsCache) = GetPathNames /*abcLinkInfo.*/linkObjFileNames ofiles` abcPathsCache
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	# (libPathsOk,lfiles,abcPathsCache)
								= GetPathNames abcLinkInfo.linkLibraryNames lfiles abcPathsCache
	| not objPathsOk
		# line					= Level3 ["Link error: File: '" +++ (Head ofiles) +++ "' not found."]
		# ps					= showInfo line ps
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		= continue False newpaths False fileinfo libsinfo modpaths project intr (abccache, ps)
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	| not libPathsOk
		# line					= Level3 ["Link error: File: '" +++ (Head lfiles) +++ "' not found."]
		# ps					= showInfo line ps
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		= continue False newpaths False fileinfo libsinfo modpaths project intr (abccache, ps)
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	// project objects and dynamic libs
/* full paths again...
	# (loobjsOk,ofiles,abcPathsCache)
								= GetPathNames lo.extraObjectModules ofiles abcPathsCache
	# (lolibsOk,lfiles,_)
								= GetPathNames lo.libraries lfiles abcPathsCache
*/
	# loobjsOk					= True
	# lolibsOk					= True
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	# extraObjectModules		= lo.extraObjectModules
	# extraObjectModules		= Map fix extraObjectModules
									with
										fix s
											| s.[size s - 1] == '.'
												= MakeObjPathname tp s
												= s
	# ofiles					= Concat extraObjectModules ofiles
	# ofiles`					= Concat extraObjectModules ofiles`
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	# lfiles					= Concat lo.libraries lfiles
	
	| not loobjsOk
		# line					= Level3 ["Link error: File: '" +++ (Head ofiles) +++ "' not found."]
		# ps					= showInfo line ps
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		= continue False newpaths False fileinfo libsinfo modpaths project intr (abccache, ps)
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	| not lolibsOk
		# line					= Level3 ["Link error: File: '" +++ (Head lfiles) +++ "' not found."]
		# ps					= showInfo line ps
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		= continue False newpaths False fileinfo libsinfo modpaths project intr (abccache, ps)
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	# (env_static_libs,ps)		= getCurrentSlibs ps
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	#! sfiles					= Concat (SL_Libs libsinfo) env_static_libs		// only if really used?
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	#! ofiles					= Reverse ofiles
	#! lfiles					= Reverse lfiles

//*	
	// .exe or .dat older than module.o
	// martijn also wants comparison with other libs and objs
	// !!! fails to check if console type options have changed...
	// ie. tries with old-fashioned PR_ExecUptoDate...
	// can't really fix this...
//	# (genabc,ps)				= CheckObjsOutOfDate genabc ofiles ps
//	# (genabc,ps) 				= CheckLibsOutOfDate genabc lfiles ps
	# (ood,ps)					= case lo.method of
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									LM_Static  
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										# (ood,ps) = CheckObjsOutOfDate genabc execpath ofiles` ps
										| ood -> (ood,ps)
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										-> CheckExecOutOfDate genabc execpath fileinfo project ps
									LM_Dynamic -> CheckExecOutOfDate genabc  ((RemoveSuffix` execpath) +++. ".bat") fileinfo project ps
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	| not ood
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		= continue True False False fileinfo libsinfo modpaths project intr (abccache, ps)
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//*/
	# static_info = 
		{ stat_mods				= symPaths app_path prj_path` modpaths
		, stat_objs				= symPaths app_path prj_path` ofiles
		, stat_slibs			= symPaths app_path prj_path` sfiles
		, stat_dlibs			= symPaths app_path prj_path` lfiles
		, stat_paths			= symPaths app_path prj_path` srcpaths
		, stat_app_path			= app_path
		, stat_prj_path			= prj_path`
		}
	# project					= setStaticInfo static_info project
	# (_,ps)					= accFiles (SaveProjectFile prj_path project app_path) ps
	# (linkstr,ps)				= getCurrentLink ps
	# (startupdir,ps)			= getStup ps
		
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// want to wait with .exe out of date checks till here...
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// ao ok
// lfiles ok
// ofiles ok
// sfiles ok
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// so: chache .exe date with used ao and lfiles,ofiles,sfiles dates...
// can imporve now by Younger checking all objects
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	# optionspath				= MakeOptionsName prj_path tp
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	# (dynlstr,ps)				= getCurrentDynl ps
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	# (ps, ok)					= Link linkstr updateErrorWindow execpath ao
									optionspath lfiles ofiles sfiles
									(lo.method == LM_Static)
									lo.generate_relocations
									lo.generate_link_map
									lo.link_resources
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									(fulPath app_path prj_path` lo.resource_source)
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									lo.generate_dll
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									(fulPath app_path prj_path` lo.dll_export_list_name)
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									startupdir dynlstr tp/*lo.add_carb_resource*/ ps
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	# project					= if ok (PR_SetLinked project) project
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	= continue ok False ok fileinfo libsinfo modpaths project intr (abccache, ps)
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where
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	DATEtoDateTime :: !DATE -> DateTime
	DATEtoDateTime {DATE | yy,mm,dd,h,m,s}
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		= ({year=yy,month=mm,day=dd,dayNr=0},{hours=h,minutes=m,seconds=s})
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step intr DDone ps
	= stop (DDone,ps)

//-- Compile Phase...

:: UnknownFinishedProcessors = NoUnknownFinishedProcessors | UnknownFinishedProcessors !Int ![Int]

add_unknown_finished_processor NoUnknownFinishedProcessors
	= UnknownFinishedProcessors 1 []
add_unknown_finished_processor (UnknownFinishedProcessors n_unknown_finished_processors known_finished_processors)
	= UnknownFinishedProcessors (n_unknown_finished_processors+1) known_finished_processors							

remove_from_unknown_finished_processors completedSlot (UnknownFinishedProcessors n_unknown_finished_processors known_finished_processors)
	| not (isMember completedSlot known_finished_processors)
		= UnknownFinishedProcessors n_unknown_finished_processors [completedSlot:known_finished_processors]
remove_from_unknown_finished_processors completedSlot unknown_finished_processors
	= unknown_finished_processors

:: *DriverCodeGenerationInfo
	= SyncCodeGeneration
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	| ASyncCodeGeneration ![(Int,String,String)] !Int !UnknownFinishedProcessors // [(busy_process_number,abc_path,obj_path)] max_n_processes unknown_finished_processors
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:: *DriverState
	= DInit !Bool !Project !MTPContinuation
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	| DComp !Bool !*DirCache !DriverCompilingInfo !(List String) !DriverStateRecord
	| DGene !(List String) !DriverCodeGenerationInfo !DriverStateRecord
	| DLink !DriverStateRecord
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	| DDone

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:: *DriverStateRecord =
	{ project	:: !Project
	, continue	:: !MTPContinuation
	, fileinfo	:: !FileInfoCache
	, abccache	:: !*ABCCache
	, libsinfo	:: !StaticLibInfo
	, ok		:: !Bool
	, newpaths	:: !Bool
	, modpaths	:: !List String
	}

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:: *DriverCompilingInfo
	= Sync
	| AsyncWin	!Int ![CurrentlyCompiled]
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	| Async	![CurrentlyCompiled] !Int !CompilerProcessIds !UnknownFinishedProcessors // busy_processors max_n_processes n_used_processors unknown_finished_processors
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	| Pers	!*CompilingInfo

compiling_info :: !DriverCompilingInfo -> (String,DriverCompilingInfo)
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/*
compiling_info info=:(AsyncWin _ current)
	=	(compiling_info_async current,info)
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*/
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compiling_info info=:(Async current _ _ _)
	= (compiling_info_async current,info);
compiling_info info
	= ("",info)

compiling_info_async []
	= ""
compiling_info_async current
	=	foldl (\s c -> s +++ " "+++(GetModuleName c.iclModule)) "Compiling:" current

//	Scan modified modules and update the dependencies (recompile if necessary).
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UpdateDependencies :: !Bool !String !(List String) !DriverCompilingInfo !*DirCache !DriverStateRecord !*(PSt *General)
	-> (*(PSt *General),*DirCache,Bool,Bool,List String,DriverCompilingInfo,DriverStateRecord,Bool)
UpdateDependencies force next rest compinfo dircache ds ps`
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	# impname					= MakeImpPathname next

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	# (version,ps)				= getCurrentVers ps					// lift to DriverState
	# (cinf,compinfo)			= compiling_info compinfo
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	# line						= Level2 ((if verbose ("Analyzing \'" +++  modname +++ "\'. ") ("")) +++ cinf)
	# ps						= verboseInfo verbose line ps
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	# (proc,ps)					= getCurrentProc ps
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	# ((abccache,fileinfo,info),ps)
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								= FI_GetFileInfo proc impname ds.abccache ds.fileinfo ps
	# ds						= {ds & abccache = abccache, fileinfo = fileinfo}
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	# abcexists					= info.abcdate.exists
	| not abcexists
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		# lines					= Level3 ["["+++modname+++".icl,]: no abc file"]
		#! ps					= showInfo lines ps
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		= case compinfo of
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			Sync				-> UpdateSyncDependencies rest impname co dircache ds ps
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			async=:(Async _ _ _ _)-> UpdateAsyncDependencies async rest impname co dircache ds ps
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//			async=:(AsyncWin _ _)-> UpdateAsyncDependencies async rest impname co dircache ds ps
			(Pers info)			-> UpdatePersDependencies info rest impname co dircache ds ps
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	| info.sys	// system module
		# wrongVersion			= info.version <> version
		| wrongVersion
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		// add automatic recompilation if system module...
		// check with John what compiler flags we should pass...
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			# line				= Level3 ["Error: System file: '" +++ modname +++ "' has incorrect abc version."]
			# ps				= showInfo line ps
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			= (ps, dircache, False, False, rest, compinfo, ds, False)
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		# wantstp				= tp && (not co.neverTimeProfile)
		# compile				= /*mp <> info.abcOptions.abcMemoryProfile ||*/ wantstp <> info.abcOptions.abcTimeProfile
		# lines					= (Level3 (if (verbose && compile) ["["+++modname+++".abc,]: System module compiled with different options"] []))
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		# ps					= verboseInfo verbose lines ps
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		| compile
			# abcPath			= MakeABCSystemPathname next
			# (patched, ps)		= accFiles (PatchSystemABC version True abcPath /*ao.memoryProfiling*/ wantstp) ps
			| patched
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				# ((abcdate,fileinfo), ps)
								= accFiles (FI_UpdateAbcDate impname abcPath wantstp ds.fileinfo) ps
				# ds = {ds & fileinfo = fileinfo}
				# ((ok,mods,_,_,objs,libs,abccache),ps)
								= accFiles (ParseABCDependencies` info.abcpath abcdate ds.abccache) ps
				# ds = {ds & abccache = abccache}
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				| not ok
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					# line		= Level3 ["Error: Strange error parsing dependencies: '" +++ info.abcpath +++ "'."]
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					// can actually only occur when failed to open .abc file...
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					# ps		= showInfo line ps
					= (ps,dircache,False,False,rest,compinfo,ds,False)
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				# (ok,paths,dircache)
								= LookupModulePaths mods dircache
				| not ok
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					# line		= Level3 ["Error: '" +++ (Head paths) +++ "' not found."]
					# ps		= showInfo line ps
					= (ps,dircache,False,False,rest,compinfo,ds,False)
				#! rest			= Concat rest paths
				#! project		= PR_AddABCInfo next objs libs defaultCO defeo impeo ds.project
				   ds = {ds & project = project, modpaths = next :! ds.modpaths}
				=	(ps, dircache, True, False, rest, compinfo, ds, True)
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			# line				= Level3 ["Error: System file: '" +++ modname +++ "' could not be patched."]
			# ps				= showInfo line ps
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			=	(ps, dircache, False, False, rest, compinfo, ds, False)
		# ((ok,mods,_,_,objs,libs,abccache),ps)
								= accFiles (ParseABCDependencies` info.abcpath info.abcdate ds.abccache) ps
		# ds = {ds & abccache = abccache}
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		| not ok
			# line				= Level3 ["Error: Strange error parsing dependencies: '" +++ info.abcpath +++ "'."]
			# ps				= showInfo line ps
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			= (ps,dircache,False,False,rest,compinfo,ds,False)
		# (ok,paths,dircache)	= LookupModulePaths mods dircache
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		| not ok
			# line				= Level3 ["Error: '" +++ (Head paths) +++ "' not found."]
			# ps				= showInfo line ps
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			= (ps,dircache,False,False,rest,compinfo,ds,False)
		#! rest					= Concat paths rest
		#! project				= PR_AddABCInfo next objs libs defaultCO defeo impeo ds.project
		   ds = {ds & project = project, modpaths = next :! ds.modpaths}
		=	(ps, dircache, True, False, rest, compinfo, ds, False)
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	// normal module
	| force
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		# lines					= Level3 ["["+++modname+++".icl,]: force compile"]
		#! ps					= showInfo lines ps
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		= case compinfo of
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			Sync				-> UpdateSyncDependencies rest impname co dircache ds ps
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			async=:(Async _ _ _ _ )-> UpdateAsyncDependencies async rest impname co dircache ds ps
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//			async=:(AsyncWin _ _)-> UpdateAsyncDependencies async rest impname co dircache ds ps
			(Pers info)			-> UpdatePersDependencies info rest impname co dircache ds ps
	# ((ok,mods,xxx_md,xxx_dd,objs,libs,abccache),ps)
								= accFiles (ParseABCDependencies` info.abcpath info.abcdate ds.abccache) ps
	# ds = {ds & abccache = abccache}
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	| not ok
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		# line					= Level3 ["Error: Strange error parsing dependencies: '" +++ info.abcpath +++ "'."]
		# ps					= showInfo line ps
		= (ps,dircache,False,False,rest,compinfo,ds,False)
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	# (okA,whyA,dircache)		= check_dependant_dates modname info.abcpath mods xxx_md xxx_dd dircache
	# (okC,whyC)				= check_module_options modname info co mp tp eod version
	
	| okA && okC
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		# (ok,paths,dircache)	= LookupModulePaths mods dircache
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		| not ok
			# line				= Level3 ["Error: '" +++ (Head paths) +++ "' not found."]
			# ps				= showInfo line ps
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			= (ps,dircache,False,False,rest,compinfo,ds,False)
		#! rest					= Concat paths rest
		#! project				= PR_AddABCInfo next objs libs co defeo impeo ds.project
		   ds = {ds & project = project, modpaths = next :! ds.modpaths}
		= (ps,dircache,True,False,rest,compinfo,ds,False)
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	# lines						= Level3 [if okC whyA whyC]