Fixup noreturn attributes in modula-2 [PR108551] and [PR108612]

Fixup noreturn attributes in modula-2 [PR108551] and [PR108612]

PR108612 - m2/gm2-libs-iso/ClientSocket.mod:229:1: error: control
reaches end of non-void function [-Werror=return-type]
PR108551 - gcc/m2/gm2-libs-pim/Termbase.mod:128:1: error: control
reaches end of non-void function [-Werror=return-type]
This patch adds missing return values to the procedure functions
mentioned in PR108612 and PR108551.  It corrects the noreturn
attribute to throw and rethrow in the modula2 frontend.  The patch
also changes HALT, Halt, Raise procedures in the libraries to use
the <* noreturn *> attribute.  Finally the patch includes
rebuilt bootstrap tools mc and pge.

gcc/m2/ChangeLog:

	* Make-lang.in (GM2_FLAGS): Add -fno-return -Wreturn-type.
	(GM2_ISO_FLAGS): Add -fno-return -Wreturn-type.
	* Make-maintainer.in (GM2PATH): Split into separate -I components.
	(MC-LIB-DEFS): Add RTentity.def.
	(m2/boot-bin/mc-devel$(exeext)): Changed -I$(GM2PATH) to
	$(GM2PATH).
	(m2/boot-bin/mc-opt$(exeext)): Separate -I paths.
	(m2/mc/decl.o): Separate -I paths.
	(gm2-bootstrap): Separate -I paths.
	(m2/mc-boot-gen/$(SRC_PREFIX)%.h): Separate -I paths.
	(m2/mc-boot-gen/$(SRC_PREFIX)decl.c): Separate -I paths.
	(m2/mc-boot-gen/$(SRC_PREFIX)%.c): Separate -I paths.
	(gm2.verifyparanoid): Separate -I paths.
	(gm2.verifystage12): Separate -I paths.
	* gm2-compiler/M2ALU.mod (GetConstructorElement): Add default
	Return NulSym.  Remove return from the error case.
	* gm2-compiler/M2Base.mod (ComplexToScalar): Return RType
	from the error case.
	(MixMetaTypes):  Return MakeError as a default.
	* gm2-compiler/M2GCCDeclare.mod (GetTypeMin): Return NulSym
	from the error case.
	(GetTypeMax): Return NulSym from the error case.
	* gm2-compiler/M2GenGCC.mod (IsExportedGcc): Replace Assert
	by InternalError.
	* gm2-compiler/M2Quads.mod (GetItemPointedTo): Add InternalError.
	(GetTypeMin): Add InternalError.
	(GetTypeMax): Add InternalError.
	* gm2-compiler/M2System.mod (InitSystem): Call
	PutProcedureNoReturn on Throw.
	* gm2-gcc/m2except.cc (m2except_InitExceptions): fn_throw_tree
	declare as noreturn.  fn_rethrow_tree declare as noreturn.
	* gm2-libs-coroutines/Debug.def (Halt): Add noreturn attribute.
	* gm2-libs-coroutines/SYSTEM.def (THROW): Add noreturn attribute.
	* gm2-libs-iso/ClientSocket.mod (dorbytes): Add return FALSE.
	* gm2-libs-iso/EXCEPTIONS.def (RAISE): Add noreturn attribute.
	* gm2-libs-iso/IOLink.def (RAISEdevException): Add noreturn attribute.
	* gm2-libs-iso/M2RTS.def (HALT): Add noreturn attribute.
	(Halt): Ditto.
	(HaltC): Ditto.
	(ErrorMessage): Ditto.
	(AssignmentException): Ditto.
	(ReturnException): Ditto.
	(IncException): Ditto.
	(DecException): Ditto.
	(InclException): Ditto.
	(ExclException): Ditto.
	(ShiftException): Ditto.
	(RotateException): Ditto.
	(StaticArraySubscriptException): Ditto.
	(DynamicArraySubscriptException): Ditto.
	(ForLoopBeginException): Ditto.
	(ForLoopToException): Ditto.
	(ForLoopEndException): Ditto.
	(PointerNilException): Ditto.
	(NoReturnException): Ditto.
	(CaseException): Ditto.
	(WholeNonPosDivException): Ditto.
	(WholeNonPosModException): Ditto.
	(WholeZeroDivException): Ditto.
	(WholeZeroRemException): Ditto.
	(WholeValueException): Ditto.
	(RealValueException): Ditto.
	(ParameterException): Ditto.
	(NoException): Ditto.
	* gm2-libs-iso/SYSTEM.def (THROW): Ditto.
	* gm2-libs-iso/TermFile.mod (dorbytes): Add default return FALSE.
	* gm2-libs-min/M2RTS.def: Add noreturn attribute.
	* gm2-libs/FIO.mod (BufferedRead): Return -1.
	(getFileName): Return NIL.
	(getFileNameLength): Return 0.
	* gm2-libs/M2RTS.def (HaltC): Add noreturn attribute.
	(AssignmentException): Ditto.
	(ReturnException): Ditto.
	(IncException): Ditto.
	(DecException): Ditto.
	(InclException): Ditto.
	(ExclException): Ditto.
	(ShiftException): Ditto.
	(RotateException): Ditto.
	(StaticArraySubscriptException): Ditto.
	(DynamicArraySubscriptException): Ditto.
	(ForLoopBeginException): Ditto.
	(ForLoopToException): Ditto.
	(ForLoopEndException): Ditto.
	(PointerNilException): Ditto.
	(NoReturnException): Ditto.
	(CaseException): Ditto.
	(WholeNonPosDivException): Ditto.
	(WholeNonPosModException): Ditto.
	(WholeZeroDivException): Ditto.
	(WholeZeroRemException): Ditto.
	(WholeValueException): Ditto.
	(RealValueException): Ditto.
	(ParameterException): Ditto.
	(NoException): Ditto.
	* gm2-libs/RTExceptions.def (Raise): Ditto.
	* gm2-libs/RTExceptions.mod (InvokeHandler): Ditto.
	* gm2-libs/SYSTEM.def (THROW): Ditto.
	* m2.flex (_M2_m2flex_fini): Remamed to...
	(_M2_m2flex_finish): ...here.
	* mc-boot-ch/GBuiltins.c (_M2_Builtins_finish): Remamed to...
	(_M2_Builtins_fini): ...this.
	* mc-boot-ch/GRTco.c (_M2_RTco_finish): Remamed to...
	(_M2_RTco_fini): ...this.
	* mc-boot-ch/GSYSTEM.c (_M2_SYSTEM_finish): Remamed to...
	(_M2_SYSTEM_fini): ...this.
	* mc-boot-ch/GSelective.c (_M2_Selective_finish): Remamed to...
	(_M2_Selective_fini): ...this.
	* mc-boot-ch/GSysExceptions.c (_M2_SysExceptions_init): Add
	parameters.
	(_M2_SysExceptions_finish): Remamed to...
	(_M2_SysExceptions_fini): ...this.
	* mc-boot-ch/GUnixArgs.cc (_M2_UnixArgs_finish): Remamed to...
	(_M2_UnixArgs_fini): ...this.
	(_M2_UnixArgs_ctor::_M2_UnixArgs_ctor): Change parameter
	to _M2_UnixArgs_fini.
	* mc-boot-ch/Gdtoa.c (_M2_dtoa_finish): Remamed to...
	(_M2_dtoa_fini): ...this.
	* mc-boot-ch/Gerrno.c (_M2_errno_finish): Remamed to...
	(_M2_errno_fini): ...this.
	* mc-boot-ch/Gldtoa.c (_M2_ldtoa_finish): Remamed to...
	(_M2_ldtoa_fini): ...this.
	* mc-boot-ch/Gtermios.cc (_M2_termios_init): Add parameters.
	(_M2_termios_finish): Remamed to...
	(_M2_termios_fini): ...this.
	* mc-boot-ch/Gwrapc.c (_M2_wrapc_init): Add parameters.
	(_M2_wrapc_finish): Remamed to...
	(_M2_wrapc_fini): ...this.
	* mc-boot/GASCII.c: Rebuild.
	* mc-boot/GArgs.c: Rebuild.
	* mc-boot/GAssertion.c: Rebuild.
	* mc-boot/GBreak.c: Rebuild.
	* mc-boot/GCmdArgs.c: Rebuild.
	* mc-boot/GDebug.c: Rebuild.
	* mc-boot/GDynamicStrings.c: Rebuild.
	* mc-boot/GEnvironment.c: Rebuild.
	* mc-boot/GFIO.c: Rebuild.
	* mc-boot/GFormatStrings.c: Rebuild.
	* mc-boot/GFpuIO.c: Rebuild.
	* mc-boot/GIO.c: Rebuild.
	* mc-boot/GIndexing.c: Rebuild.
	* mc-boot/GM2Dependent.c: Rebuild.
	* mc-boot/GM2EXCEPTION.c: Rebuild.
	* mc-boot/GM2RTS.c: Rebuild.
	* mc-boot/GM2RTS.h: Rebuild.
	* mc-boot/GMemUtils.c: Rebuild.
	* mc-boot/GNumberIO.c: Rebuild.
	* mc-boot/GPushBackInput.c: Rebuild.
	* mc-boot/GRTExceptions.c: Rebuild.
	* mc-boot/GRTExceptions.h: Rebuild.
	* mc-boot/GRTco.h: Rebuild.
	* mc-boot/GRTint.c: Rebuild.
	* mc-boot/GSArgs.c: Rebuild.
	* mc-boot/GSFIO.c: Rebuild.
	* mc-boot/GStdIO.c: Rebuild.
	* mc-boot/GStorage.c: Rebuild.
	* mc-boot/GStrCase.c: Rebuild.
	* mc-boot/GStrIO.c: Rebuild.
	* mc-boot/GStrLib.c: Rebuild.
	* mc-boot/GStringConvert.c: Rebuild.
	* mc-boot/GSysStorage.c: Rebuild.
	* mc-boot/GTimeString.c: Rebuild.
	* mc-boot/Galists.c: Rebuild.
	* mc-boot/Gdecl.c: Rebuild.
	* mc-boot/Gkeyc.c: Rebuild.
	* mc-boot/Glists.c: Rebuild.
	* mc-boot/GmcComment.c: Rebuild.
	* mc-boot/GmcComp.c: Rebuild.
	* mc-boot/GmcDebug.c: Rebuild.
	* mc-boot/GmcError.c: Rebuild.
	* mc-boot/GmcFileName.c: Rebuild.
	* mc-boot/GmcLexBuf.c: Rebuild.
	* mc-boot/GmcMetaError.c: Rebuild.
	* mc-boot/GmcOptions.c: Rebuild.
	* mc-boot/GmcPreprocess.c: Rebuild.
	* mc-boot/GmcPretty.c: Rebuild.
	* mc-boot/GmcPrintf.c: Rebuild.
	* mc-boot/GmcQuiet.c: Rebuild.
	* mc-boot/GmcReserved.c: Rebuild.
	* mc-boot/GmcSearch.c: Rebuild.
	* mc-boot/GmcStack.c: Rebuild.
	* mc-boot/GmcStream.c: Rebuild.
	* mc-boot/Gmcp1.c: Rebuild.
	* mc-boot/Gmcp2.c: Rebuild.
	* mc-boot/Gmcp3.c: Rebuild.
	* mc-boot/Gmcp4.c: Rebuild.
	* mc-boot/Gmcp5.c: Rebuild.
	* mc-boot/GnameKey.c: Rebuild.
	* mc-boot/GsymbolKey.c: Rebuild.
	* mc-boot/Gtop.c: Rebuild.
	* mc-boot/Gvarargs.c: Rebuild.
	* mc-boot/Gwlists.c: Rebuild.
	* mc-boot/GRTentity.h: New file.
	* mc/decl.mod (scaffoldStatic): Change _finish to _fini.
	* mc/mc.flex (_M2_mcflex_fini): New function.
	(_M2_mcflex_finish): Remove function.
	* tools-src/mklink.c (GenerateFinishCalls): Change
	_finish to _fini.
	(GeneratePrototypes): Change _finish to _fini.

libgm2/ChangeLog:

	* libm2cor/Makefile.am (libm2cor_la_M2FLAGS): Add -Wreturn-type
	-fcase.
	* libm2cor/Makefile.in: Rebuild.
	* libm2iso/Makefile.am (libm2iso_la_M2FLAGS): Add -Wreturn-type
	-fcase.
	* libm2iso/Makefile.in: Rebuild.
	* libm2log/Makefile.am (libm2log_la_M2FLAGS): Add -Wreturn-type
	-fcase.
	* libm2log/Makefile.in: Rebuild.
	* libm2pim/Makefile.am (libm2pim_la_M2FLAGS): Add -Wreturn-type
	-fcase.
	* libm2pim/Makefile.in: Rebuild.

	PR modula2/108612
	PR modula2/108551

Signed-off-by: Gaius Mulley <gaiusmod2@gmail.com>