2005-03-08  Robert Dewar  <dewar@adacore.com>

	* system-unixware.ads, system-linux-ia64.ads, system-freebsd-x86.ads,
	system-lynxos-ppc.ads, system-lynxos-x86.ads, system-linux-x86_64.ads,
	system-tru64.ads, system-aix.ads, system-vxworks-sparcv9.ads,
	system-vxworks-xscale.ads, system-solaris-x86.ads, system-irix-o32.ads,
	system-irix-n32.ads, system-hpux.ads, system-vxworks-m68k.ads,
	system-linux-x86.ads, system-vxworks-mips.ads, system-os2.ads,
	system-interix.ads, system-solaris-sparc.ads,
	system-solaris-sparcv9.ads, system-vms.ads, system-mingw.ads,
	system-vms-zcx.ads, system-vxworks-ppc.ads, system-vxworks-alpha.ads,
	system-vms_64.ads, system-darwin-ppc.ads, system-vxworks-x86.ads,
	system-linux-ppc.ads, system-linux-alpha.ads, system-linux-sparc.ads,
	system-linux-s390.ads, system-linux-s390x.ads: Add line defining
	Compiler_System_Version to be False.

	* opt.ads: Add new flag Opt.Address_Is_Private

	* targparm.ads, targparm.adb: Set new flag Opt.Address_Is_Private
	Add new parameter Compiler_System_Version to avoid checking for
	completeness of parameters when compiler is compiling itself.
	Allows old versions of GNAT to be compiled with new compiler.

From-SVN: r96478