2003-10-21 Arnaud Charlet <charlet@act-europe.fr>

	* 3psoccon.ads, 3veacodu.adb, 3vexpect.adb, 3vsoccon.ads,
	3vsocthi.adb, 3vsocthi.ads, 3vtrasym.adb, 3zsoccon.ads,
	3zsocthi.adb, 3zsocthi.ads, 50system.ads, 51system.ads,
	55system.ads, 56osinte.adb, 56osinte.ads, 56taprop.adb,
	56taspri.ads, 56tpopsp.adb, 57system.ads, 58system.ads,
	59system.ads, 5aml-tgt.adb, 5bml-tgt.adb, 5csystem.ads,
	5dsystem.ads, 5fosinte.adb, 5gml-tgt.adb, 5hml-tgt.adb,
	5isystem.ads, 5lparame.adb, 5msystem.ads, 5psystem.ads,
	5sml-tgt.adb, 5sosprim.adb, 5stpopsp.adb, 5tsystem.ads,
	5usystem.ads, 5vml-tgt.adb, 5vsymbol.adb, 5vtraent.adb,
	5vtraent.ads, 5wml-tgt.adb, 5xparame.ads, 5xsystem.ads,
	5xvxwork.ads, 5yparame.ads, 5ytiitho.adb, 5zinit.adb,
	5zml-tgt.adb, 5zparame.ads, 5ztaspri.ads, 5ztfsetr.adb,
	5zthrini.adb, 5ztiitho.adb, 5ztpopsp.adb, 7stfsetr.adb,
	7straces.adb, 7strafor.adb, 7strafor.ads, 7stratas.adb,
	a-excach.adb, a-exexda.adb, a-exexpr.adb, a-exextr.adb,
	a-exstat.adb, a-strsup.adb, a-strsup.ads, a-stwisu.adb,
	a-stwisu.ads, bld.adb, bld.ads, bld-io.adb,
	bld-io.ads, clean.adb, clean.ads, ctrl_c.c,
	erroutc.adb, erroutc.ads, errutil.adb, errutil.ads,
	err_vars.ads, final.c, g-arrspl.adb, g-arrspl.ads,
	g-boubuf.adb, g-boubuf.ads, g-boumai.ads, g-bubsor.adb,
	g-bubsor.ads, g-comver.adb, g-comver.ads, g-ctrl_c.ads,
	g-dynhta.adb, g-dynhta.ads, g-eacodu.adb, g-excact.adb,
	g-excact.ads, g-heasor.adb, g-heasor.ads, g-memdum.adb,
	g-memdum.ads, gnatclean.adb, gnatsym.adb, g-pehage.adb,
	g-pehage.ads, g-perhas.ads, gpr2make.adb, gpr2make.ads,
	gprcmd.adb, gprep.adb, gprep.ads, g-semaph.adb,
	g-semaph.ads, g-string.adb, g-string.ads, g-strspl.ads,
	g-wistsp.ads, i-vthrea.adb, i-vthrea.ads, i-vxwoio.adb,
	i-vxwoio.ads, Makefile.generic, Makefile.prolog, Makefile.rtl,
	prep.adb, prep.ads, prepcomp.adb, prepcomp.ads,
	prj-err.adb, prj-err.ads, s-boarop.ads, s-carsi8.adb,
	s-carsi8.ads, s-carun8.adb, s-carun8.ads, s-casi16.adb,
	s-casi16.ads, s-casi32.adb, s-casi32.ads, s-casi64.adb,
	s-casi64.ads, s-casuti.adb, s-casuti.ads, s-caun16.adb,
	s-caun16.ads, s-caun32.adb, s-caun32.ads, s-caun64.adb,
	s-caun64.ads, scng.adb, scng.ads, s-exnint.adb,
	s-exnllf.adb, s-exnlli.adb, s-expint.adb, s-explli.adb,
	s-geveop.adb, s-geveop.ads, s-hibaen.ads, s-htable.adb,
	s-htable.ads, sinput-c.adb, sinput-c.ads, s-memcop.ads,
	socket.c, s-purexc.ads, s-scaval.adb, s-stopoo.adb,
	s-strcom.adb, s-strcom.ads, s-strxdr.adb, s-rident.ads,
	s-thread.adb, s-thread.ads, s-tpae65.adb, s-tpae65.ads,
	s-tporft.adb, s-traent.adb, s-traent.ads, styleg.adb,
	styleg.ads, styleg-c.adb, styleg-c.ads, s-veboop.adb,
	s-veboop.ads, s-vector.ads, symbols.adb, symbols.ads,
	tb-alvms.c, tb-alvxw.c, tempdir.adb, tempdir.ads,
	vms_conv.ads, vms_conv.adb, vms_data.ads,
	vxaddr2line.adb: Files added. Merge with ACT tree.

	* 4dintnam.ads, 4mintnam.ads, 4uintnam.ads, 52system.ads,
	5dosinte.ads, 5etpopse.adb, 5mosinte.ads, 5qosinte.adb,
	5qosinte.ads, 5qstache.adb, 5qtaprop.adb, 5qtaspri.ads,
	5stpopse.adb, 5uintman.adb, 5uosinte.ads, adafinal.c,
	g-enblsp.adb, io-aux.c, scn-nlit.adb, scn-slit.adb,
	s-exnflt.ads, s-exngen.adb, s-exngen.ads, s-exnlfl.ads,
	s-exnlin.ads, s-exnsfl.ads, s-exnsin.ads, s-exnssi.ads,
	s-expflt.ads, s-expgen.adb, s-expgen.ads, s-explfl.ads,
	s-explin.ads, s-expllf.ads, s-expsfl.ads, s-expsin.ads,
	s-expssi.ads, style.adb: Files removed. Merge with ACT tree.

	* 1ic.ads, 31soccon.ads, 31soliop.ads, 3asoccon.ads,
	3bsoccon.ads, 3gsoccon.ads, 3hsoccon.ads, 3ssoccon.ads,
	3ssoliop.ads, 3wsoccon.ads, 3wsocthi.adb, 3wsocthi.ads,
	3wsoliop.ads, 41intnam.ads, 42intnam.ads, 4aintnam.ads,
	4cintnam.ads, 4gintnam.ads, 4hexcpol.adb, 4hintnam.ads,
	4lintnam.ads, 4nintnam.ads, 4ointnam.ads, 4onumaux.ads,
	4pintnam.ads, 4sintnam.ads, 4vcaldel.adb, 4vcalend.adb,
	4vintnam.ads, 4wexcpol.adb, 4wintnam.ads, 4zintnam.ads,
	51osinte.adb, 51osinte.ads, 52osinte.adb, 52osinte.ads,
	53osinte.ads, 54osinte.ads, 5aosinte.adb, 5aosinte.ads,
	5asystem.ads, 5ataprop.adb, 5atasinf.ads, 5ataspri.ads,
	5atpopsp.adb, 5avxwork.ads, 5bosinte.adb, 5bosinte.ads,
	5bsystem.ads, 5cosinte.ads, 5esystem.ads, 5fintman.adb,
	5fosinte.ads, 5fsystem.ads, 5ftaprop.adb, 5ftasinf.ads,
	5ginterr.adb, 5gintman.adb, 5gmastop.adb, 5gosinte.ads,
	5gproinf.ads, 5gsystem.ads, 5gtaprop.adb, 5gtasinf.ads,
	5gtpgetc.adb, 5hosinte.adb, 5hosinte.ads, 5hsystem.ads,
	5htaprop.adb, 5htaspri.ads, 5htraceb.adb, 5iosinte.adb,
	5itaprop.adb, 5itaspri.ads, 5ksystem.ads, 5kvxwork.ads,
	5lintman.adb, 5lml-tgt.adb, 5losinte.ads, 5lsystem.ads,
	5mvxwork.ads, 5ninmaop.adb, 5nintman.adb, 5nosinte.ads,
	5ntaprop.adb, 5ntaspri.ads, 5ointerr.adb, 5omastop.adb,
	5oosinte.adb, 5oosinte.ads, 5oosprim.adb, 5oparame.adb,
	5osystem.ads, 5otaprop.adb, 5otaspri.ads, 5posinte.ads,
	5posprim.adb, 5pvxwork.ads, 5sintman.adb, 5sosinte.adb,
	5sosinte.ads, 5ssystem.ads, 5staprop.adb, 5stasinf.ads,
	5staspri.ads, 5svxwork.ads, 5tosinte.ads, 5vasthan.adb,
	5vinmaop.adb, 5vinterr.adb, 5vintman.adb, 5vintman.ads,
	5vmastop.adb, 5vosinte.adb, 5vosinte.ads, 5vosprim.adb,
	5vsystem.ads, 5vtaprop.adb, 5vtaspri.ads, 5vtpopde.adb,
	5vtpopde.ads, 5wgloloc.adb, 5wintman.adb, 5wmemory.adb,
	5wosprim.adb, 5wsystem.ads, 5wtaprop.adb, 5wtaspri.ads,
	5ysystem.ads, 5zinterr.adb, 5zintman.adb, 5zosinte.adb,
	5zosinte.ads, 5zosprim.adb, 5zsystem.ads, 5ztaprop.adb,
	6vcpp.adb, 6vcstrea.adb, 6vinterf.ads, 7sinmaop.adb,
	7sintman.adb, 7sosinte.adb, 7sosprim.adb, 7staprop.adb,
	7staspri.ads, 7stpopsp.adb, 7straceb.adb, 9drpc.adb,
	a-caldel.adb, a-caldel.ads, a-charac.ads, a-colien.ads,
	a-comlin.adb, adaint.c, adaint.h, ada-tree.def,
	a-diocst.adb, a-diocst.ads, a-direio.adb, a-except.adb,
	a-except.ads, a-excpol.adb, a-exctra.adb, a-exctra.ads,
	a-filico.adb, a-interr.adb, a-intsig.adb, a-intsig.ads,
	ali.adb, ali.ads, ali-util.adb, ali-util.ads,
	a-ngcefu.adb, a-ngcoty.adb, a-ngelfu.adb, a-nudira.adb,
	a-nudira.ads, a-nuflra.adb, a-nuflra.ads, a-reatim.adb,
	a-reatim.ads, a-retide.ads, a-sequio.adb, a-siocst.adb,
	a-siocst.ads, a-ssicst.adb, a-ssicst.ads, a-strbou.adb,
	a-strbou.ads, a-strfix.adb, a-strmap.adb, a-strsea.ads,
	a-strunb.adb, a-strunb.ads, a-ststio.adb, a-stunau.adb,
	a-stunau.ads, a-stwibo.adb, a-stwibo.ads, a-stwifi.adb,
	a-stwima.adb, a-stwiun.adb, a-stwiun.ads, a-tags.adb,
	a-tags.ads, a-tasatt.adb, a-taside.adb, a-teioed.adb,
	a-textio.adb, a-textio.ads, a-tienau.adb, a-tifiio.adb,
	a-tiflau.adb, a-tiflio.adb, a-tigeau.adb, a-tigeau.ads,
	a-tiinau.adb, a-timoau.adb, a-tiocst.adb, a-tiocst.ads,
	atree.adb, atree.ads, a-witeio.adb, a-witeio.ads,
	a-wtcstr.adb, a-wtcstr.ads, a-wtdeio.adb, a-wtedit.adb,
	a-wtenau.adb, a-wtflau.adb, a-wtinau.adb, a-wtmoau.adb,
	bcheck.adb, binde.adb, bindgen.adb, bindusg.adb,
	checks.adb, checks.ads, cio.c, comperr.adb,
	comperr.ads, csets.adb, cstand.adb, cstreams.c,
	debug_a.adb, debug_a.ads, debug.adb, decl.c,
	einfo.adb, einfo.ads, errout.adb, errout.ads,
	eval_fat.adb, eval_fat.ads, exp_aggr.adb, expander.adb,
	expander.ads, exp_attr.adb, exp_ch11.adb, exp_ch13.adb,
	exp_ch2.adb, exp_ch3.adb, exp_ch3.ads, exp_ch4.adb,
	exp_ch5.adb, exp_ch6.adb, exp_ch7.adb, exp_ch7.ads,
	exp_ch8.adb, exp_ch9.adb, exp_code.adb, exp_dbug.adb,
	exp_dbug.ads, exp_disp.adb, exp_dist.adb, expect.c,
	exp_fixd.adb, exp_imgv.adb, exp_intr.adb, exp_pakd.adb,
	exp_prag.adb, exp_strm.adb, exp_strm.ads, exp_tss.adb,
	exp_tss.ads, exp_util.adb, exp_util.ads, exp_vfpt.adb,
	fe.h, fmap.adb, fmap.ads, fname.adb,
	fname.ads, fname-uf.adb, fname-uf.ads, freeze.adb,
	freeze.ads, frontend.adb, g-awk.adb, g-awk.ads,
	g-busora.adb, g-busora.ads, g-busorg.adb, g-busorg.ads,
	g-casuti.adb, g-casuti.ads, g-catiio.adb, g-catiio.ads,
	g-cgi.adb, g-cgi.ads, g-cgicoo.adb, g-cgicoo.ads,
	g-cgideb.adb, g-cgideb.ads, g-comlin.adb, g-comlin.ads,
	g-crc32.adb, g-crc32.ads, g-debpoo.adb, g-debpoo.ads,
	g-debuti.adb, g-debuti.ads, g-diopit.adb, g-diopit.ads,
	g-dirope.adb, g-dirope.ads, g-dyntab.adb, g-dyntab.ads,
	g-except.ads, g-exctra.adb, g-exctra.ads, g-expect.adb,
	g-expect.ads, g-hesora.adb, g-hesora.ads, g-hesorg.adb,
	g-hesorg.ads, g-htable.adb, g-htable.ads, gigi.h,
	g-io.adb, g-io.ads, g-io_aux.adb, g-io_aux.ads,
	g-locfil.adb, g-locfil.ads, g-md5.adb, g-md5.ads,
	gmem.c, gnat1drv.adb, gnatbind.adb, gnatchop.adb,
	gnatcmd.adb, gnatfind.adb, gnatkr.adb, gnatlbr.adb,
	gnatlink.adb, gnatls.adb, gnatmake.adb, gnatmem.adb,
	gnatname.adb, gnatprep.adb, gnatprep.ads, gnatpsta.adb,
	gnatxref.adb, g-os_lib.adb, g-os_lib.ads, g-regexp.adb,
	g-regexp.ads, g-regist.adb, g-regist.ads, g-regpat.adb,
	g-regpat.ads, g-soccon.ads, g-socket.adb, g-socket.ads,
	g-socthi.adb, g-socthi.ads, g-soliop.ads, g-souinf.ads,
	g-speche.adb, g-speche.ads, g-spipat.adb, g-spipat.ads,
	g-spitbo.adb, g-spitbo.ads, g-sptabo.ads, g-sptain.ads,
	g-sptavs.ads, g-table.adb, g-table.ads, g-tasloc.adb,
	g-tasloc.ads, g-thread.adb, g-thread.ads, g-traceb.adb,
	g-traceb.ads, g-trasym.adb, g-trasym.ads, hostparm.ads,
	i-c.ads, i-cobol.adb, i-cpp.adb, i-cstrea.ads,
	i-cstrin.adb, i-cstrin.ads, impunit.adb, init.c,
	inline.adb, interfac.ads, i-pacdec.ads, itypes.adb,
	itypes.ads, i-vxwork.ads, lang.opt, lang-specs.h,
	layout.adb, lib.adb, lib.ads, lib-list.adb,
	lib-load.adb, lib-load.ads, lib-sort.adb, lib-util.adb,
	lib-writ.adb, lib-writ.ads, lib-xref.adb, lib-xref.ads,
	link.c, live.adb, make.adb, make.ads,
	Makefile.adalib, Makefile.in, Make-lang.in, makeusg.adb,
	mdll.adb, mdll-fil.adb, mdll-fil.ads, mdll-utl.adb,
	mdll-utl.ads, memroot.adb, memroot.ads, memtrack.adb,
	misc.c, mkdir.c, mlib.adb, mlib.ads,
	mlib-fil.adb, mlib-fil.ads, mlib-prj.adb, mlib-prj.ads,
	mlib-tgt.adb, mlib-tgt.ads, mlib-utl.adb, mlib-utl.ads,
	namet.adb, namet.ads, namet.h, nlists.ads,
	nlists.h, nmake.adt, opt.adb, opt.ads,
	osint.adb, osint.ads, osint-b.adb, osint-c.adb,
	par.adb, par-ch10.adb, par-ch11.adb, par-ch2.adb,
	par-ch3.adb, par-ch4.adb, par-ch5.adb, par-ch6.adb,
	par-ch9.adb, par-endh.adb, par-labl.adb, par-load.adb,
	par-prag.adb, par-sync.adb, par-tchk.adb, par-util.adb,
	prj.adb, prj.ads, prj-attr.adb, prj-attr.ads,
	prj-com.adb, prj-com.ads, prj-dect.adb, prj-dect.ads,
	prj-env.adb, prj-env.ads, prj-ext.adb, prj-ext.ads,
	prj-makr.adb, prj-makr.ads, prj-nmsc.adb, prj-nmsc.ads,
	prj-pars.adb, prj-pars.ads, prj-part.adb, prj-part.ads,
	prj-pp.adb, prj-pp.ads, prj-proc.adb, prj-proc.ads,
	prj-strt.adb, prj-strt.ads, prj-tree.adb, prj-tree.ads,
	prj-util.adb, prj-util.ads, raise.c, raise.h,
	repinfo.adb, repinfo.h, restrict.adb, restrict.ads,
	rident.ads, rtsfind.adb, rtsfind.ads, s-addima.ads,
	s-arit64.adb, s-assert.adb, s-assert.ads, s-atacco.adb,
	s-atacco.ads, s-auxdec.adb, s-auxdec.ads, s-bitops.adb,
	scans.ads, scn.adb, scn.ads, s-crc32.adb,
	s-crc32.ads, s-direio.adb, sem.adb, sem.ads,
	sem_aggr.adb, sem_attr.adb, sem_attr.ads, sem_case.adb,
	sem_case.ads, sem_cat.adb, sem_cat.ads, sem_ch10.adb,
	sem_ch11.adb, sem_ch12.adb, sem_ch12.ads, sem_ch13.adb,
	sem_ch13.ads, sem_ch3.adb, sem_ch3.ads, sem_ch4.adb,
	sem_ch5.adb, sem_ch5.ads, sem_ch6.adb, sem_ch6.ads,
	sem_ch7.adb, sem_ch7.ads, sem_ch8.adb, sem_ch8.ads,
	sem_ch9.adb, sem_disp.adb, sem_disp.ads, sem_dist.adb,
	sem_elab.adb, sem_eval.adb, sem_eval.ads, sem_intr.adb,
	sem_maps.adb, sem_mech.adb, sem_prag.adb, sem_prag.ads,
	sem_res.adb, sem_res.ads, sem_type.adb, sem_type.ads,
	sem_util.adb, sem_util.ads, sem_warn.adb, s-errrep.adb,
	s-errrep.ads, s-exctab.adb, s-exctab.ads, s-exnint.ads,
	s-exnllf.ads, s-exnlli.ads, s-expint.ads, s-explli.ads,
	s-expuns.ads, s-fatflt.ads, s-fatgen.adb, s-fatgen.ads,
	s-fatlfl.ads, s-fatllf.ads, s-fatsfl.ads, s-fileio.adb,
	s-fileio.ads, s-finimp.adb, s-finimp.ads, s-finroo.adb,
	s-finroo.ads, sfn_scan.adb, s-gloloc.adb, s-gloloc.ads,
	s-imgdec.adb, s-imgenu.adb, s-imgrea.adb, s-imgwch.adb,
	sinfo.adb, sinfo.ads, s-inmaop.ads, sinput.adb,
	sinput.ads, sinput-d.adb, sinput-l.adb, sinput-l.ads,
	sinput-p.adb, sinput-p.ads, s-interr.adb, s-interr.ads,
	s-intman.ads, s-maccod.ads, s-mastop.adb, s-mastop.ads,
	s-memory.adb, s-memory.ads, snames.adb, snames.ads,
	snames.h, s-osprim.ads, s-parame.ads, s-parint.ads,
	s-pooloc.adb, s-pooloc.ads, s-poosiz.adb, sprint.adb,
	s-proinf.ads, s-scaval.ads, s-secsta.adb, s-secsta.ads,
	s-sequio.adb, s-shasto.adb, s-shasto.ads, s-soflin.ads,
	s-stache.adb, s-stache.ads, s-stalib.adb, s-stalib.ads,
	s-stoele.ads, s-stopoo.ads, s-stratt.adb, s-stratt.ads,
	s-strops.adb, s-strops.ads, s-taasde.adb, s-taasde.ads,
	s-tadeca.adb, s-tadeca.ads, s-tadert.adb, s-tadert.ads,
	s-taenca.adb, s-taenca.ads, s-taprob.adb, s-taprob.ads,
	s-taprop.ads, s-tarest.adb, s-tarest.ads, s-tasdeb.adb,
	s-tasdeb.ads, s-tasinf.adb, s-tasinf.ads, s-tasini.adb,
	s-tasini.ads, s-taskin.adb, s-taskin.ads, s-tasque.adb,
	s-tasque.ads, s-tasren.adb, s-tasren.ads, s-tasres.ads,
	s-tassta.adb, s-tassta.ads, s-tasuti.adb, s-tasuti.ads,
	s-tataat.adb, s-tataat.ads, s-tpinop.adb, s-tpinop.ads,
	s-tpoben.adb, s-tpoben.ads, s-tpobop.adb, s-tpobop.ads,
	s-tposen.adb, s-tposen.ads, s-traceb.adb, s-traceb.ads,
	stringt.adb, stringt.ads, stringt.h, style.ads,
	stylesw.adb, stylesw.ads, s-unstyp.ads, s-vaflop.ads,
	s-valrea.adb, s-valuti.adb, s-vercon.adb, s-vmexta.adb,
	s-wchcnv.ads, s-wchcon.ads, s-widcha.adb, switch.adb,
	switch.ads, switch-b.adb, switch-c.adb, switch-m.adb,
	s-wwdcha.adb, s-wwdwch.adb, sysdep.c, system.ads,
	table.adb, table.ads, targparm.adb, targparm.ads,
	targtyps.c, tbuild.adb, tbuild.ads, tracebak.c,
	trans.c, tree_io.adb, treepr.adb, treeprs.adt,
	ttypes.ads, types.ads, types.h, uintp.adb,
	uintp.ads, uintp.h, uname.adb, urealp.adb,
	urealp.ads, urealp.h, usage.adb, utils2.c,
	utils.c, validsw.adb, validsw.ads, widechar.adb,
	xeinfo.adb, xnmake.adb, xref_lib.adb, xref_lib.ads,
	xr_tabls.adb, xr_tabls.ads, xtreeprs.adb, xsnames.adb,
	einfo.h, sinfo.h, treeprs.ads, nmake.ads, nmake.adb,
	gnatvsn.ads: Merge with ACT tree.

	* gnatvsn.adb: Rewritten in a simpler and more efficient way.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@72751 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 230 insertions, 42 deletions

diff --git a/gcc/ada/g-os_lib.ads b/gcc/ada/g-os_lib.ads
index c6dfede2021..f7cf85bb3fc 100644
--- a/gcc/ada/g-os_lib.ads
+++ b/gcc/ada/g-os_lib.ads
@@ -6,7 +6,7 @@
 --                                                                          --
 --                                 S p e c                                  --
 --                                                                          --
---          Copyright (C) 1995-2002 Free Software Foundation, Inc.          --
+--          Copyright (C) 1995-2003 Free Software Foundation, Inc.          --
 --                                                                          --
 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
 -- terms of the  GNU General Public License as published  by the Free Soft- --
@@ -26,7 +26,8 @@
 -- however invalidate  any other reasons why  the executable file  might be --
 -- covered by the  GNU Public License.                                      --
 --                                                                          --
--- Extensive contributions were provided by Ada Core Technologies Inc.   --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc.      --
 --                                                                          --
 ------------------------------------------------------------------------------
 
@@ -46,27 +47,44 @@
 --  all GNAT implementations on all supported operating systems.
 
 with System;
-with Unchecked_Deallocation;
+with GNAT.Strings;
 
 package GNAT.OS_Lib is
 pragma Elaborate_Body (OS_Lib);
 
-   type String_Access is access all String;
+   subtype String_Access is Strings.String_Access;
    --  General purpose string access type. Some of the functions in this
    --  package allocate string results on the heap, and return a value of
    --  this type. Note that the caller is responsible for freeing this
    --  String to avoid memory leaks.
 
-   procedure Free is new Unchecked_Deallocation
-     (Object => String, Name => String_Access);
+   function "=" (Left, Right : in String_Access) return Boolean
+     renames Strings."=";
+
+   procedure Free (X : in out String_Access) renames Strings.Free;
    --  This procedure is provided for freeing returned values of type
    --  String_Access
 
-   type String_List is array (Positive range <>) of String_Access;
-   type String_List_Access is access all String_List;
+   subtype String_List is Strings.String_List;
+   function "=" (Left, Right : in String_List) return Boolean
+     renames Strings."=";
+
+   function "&" (Left : String_Access; Right : String_Access)
+     return String_List renames Strings."&";
+   function "&" (Left : String_Access; Right : String_List)
+     return String_List renames Strings."&";
+   function "&" (Left : String_List; Right : String_Access)
+     return String_List renames Strings."&";
+   function "&" (Left : String_List; Right : String_List)
+     return String_List renames Strings."&";
+
+   subtype String_List_Access is Strings.String_List_Access;
    --  General purpose array and pointer for list of string accesses
+   function "=" (Left, Right : in String_List_Access) return Boolean
+     renames Strings."=";
 
-   procedure Free (Arg : in out String_List_Access);
+   procedure Free (Arg : in out String_List_Access)
+     renames Strings.Free;
    --  Frees the given array and all strings that its elements reference,
    --  and then sets the argument to null. Provided for freeing returned
    --  values of this type (including Argument_List_Access).
@@ -100,6 +118,14 @@ pragma Elaborate_Body (OS_Lib);
    function GM_Minute  (Date : OS_Time) return Minute_Type;
    function GM_Second  (Date : OS_Time) return Second_Type;
 
+   function "<"  (X, Y : OS_Time) return Boolean;
+   function ">"  (X, Y : OS_Time) return Boolean;
+   function ">=" (X, Y : OS_Time) return Boolean;
+   function "<=" (X, Y : OS_Time) return Boolean;
+   --  Basic comparison operators on OS_Time with obvious meanings. Note
+   --  that these have Intrinsic convention, so for example it is not
+   --  permissible to create accesses to any of these functions.
+
    procedure GM_Split
      (Date    : OS_Time;
       Year    : out Year_Type;
@@ -125,15 +151,15 @@ pragma Elaborate_Body (OS_Lib);
    --  permitted, and will be ignored (more accurately, the NUL and any
    --  characters that follow it will be ignored).
 
-   type File_Descriptor is private;
-   --  Corresponds to the int file handle values used in the C routines,
+   type File_Descriptor is new Integer;
+   --  Corresponds to the int file handle values used in the C routines
 
-   Standin  : constant File_Descriptor;
-   Standout : constant File_Descriptor;
-   Standerr : constant File_Descriptor;
+   Standin  : constant File_Descriptor := 0;
+   Standout : constant File_Descriptor := 1;
+   Standerr : constant File_Descriptor := 2;
    --  File descriptors for standard input output files
 
-   Invalid_FD : constant File_Descriptor;
+   Invalid_FD : constant File_Descriptor := -1;
    --  File descriptor returned when error in opening/creating file;
 
    type Mode is (Binary, Text);
@@ -145,7 +171,7 @@ pragma Elaborate_Body (OS_Lib);
    --  Text as the mode parameter causes the system to do CR/LF translation
    --  and also to recognize the DOS end of file character on input. The use
    --  of Text where appropriate allows programs to take a portable Unix view
-   --  of DOs-format files and process them appropriately.
+   --  of DOS-format files and process them appropriately.
 
    function Open_Read
      (Name  : String;
@@ -188,15 +214,40 @@ pragma Elaborate_Body (OS_Lib);
    procedure Create_Temp_File
      (FD   : out File_Descriptor;
       Name : out Temp_File_Name);
-   --  Create and open for writing a temporary file. The name of the
-   --  file and the File Descriptor are returned. The File Descriptor
-   --  returned is Invalid_FD in the case of failure. No mode parameter
-   --  is provided. Since this is a temporary file, there is no point in
-   --  doing text translation on it.
+   --  Create and open for writing a temporary file in the current working
+   --  directory. The name of the file and the File Descriptor are returned.
+   --  The File Descriptor returned is Invalid_FD in the case of failure.
+   --  No mode parameter is provided. Since this is a temporary file,
+   --  there is no point in doing text translation on it.
+   --  On some OSes, the maximum number of temp files that can be
+   --  created with this procedure may be limited. When the maximum is
+   --  reached, this procedure returns Invalid_FD. On some OSes, there may be
+   --  a race condition between processes trying to create temp files
+   --  at the same time in the same directory using this procedure.
+
+   procedure Create_Temp_File
+     (FD   : out File_Descriptor;
+      Name : out String_Access);
+   --  Create and open for writing a temporary file in the current working
+   --  directory. The name of the file and the File Descriptor are returned.
+   --  No mode parameter is provided. Since this is a temporary file,
+   --  there is no point in doing text translation on it.
+   --  It is the responsibility of the caller to deallocate the access value
+   --  returned in Name.
+   --  This procedure will always succeed if the current working directory
+   --  is writable. If the current working directory is not writable, then
+   --  Invalid_FD is returned for the file descriptor and null for the Name.
+   --  There is no race condition problem between processes trying to
+   --  create temp files at the same time in the same directory.
+
+   procedure Close (FD : File_Descriptor; Status : out Boolean);
+   --  Close file referenced by FD. Status is False if the underlying service
+   --  failed. Reasons for failure include: disk full, disk quotas exceeded
+   --  and invalid file descriptor (the file may have been closed twice).
 
    procedure Close (FD : File_Descriptor);
-   pragma Import (C, Close, "close");
-   --  Close file referenced by FD
+   --  Close file referenced by FD. This form is used when the caller
+   --  wants to ignore any possible error (see above for error cases).
 
    procedure Delete_File (Name : String; Success : out Boolean);
    --  Deletes file. Success is set True or False indicating if the delete is
@@ -206,8 +257,79 @@ pragma Elaborate_Body (OS_Lib);
      (Old_Name : String;
       New_Name : String;
       Success  : out Boolean);
-   --  Rename a file. Success is set True or False indicating if the rename is
-   --  successful.
+   --  Rename a file. Success is set True or False indicating if the
+   --  rename is successful or not.
+
+   --  The following defines the mode for the Copy_File procedure below.
+   --  Note that "time stamps and other file attributes" in the descriptions
+   --  below refers to the creation and last modification times, and also
+   --  the file access (read/write/execute) status flags.
+
+   type Copy_Mode is
+     (Copy,
+      --  Copy the file. It is an error if the target file already exists.
+      --  The time stamps and other file attributes are preserved in the copy.
+
+      Overwrite,
+      --  If the target file exists, the file is replaced otherwise
+      --  the file is just copied. The time stamps and other file
+      --  attributes are preserved in the copy.
+
+      Append);
+      --  If the target file exists, the contents of the source file
+      --  is appended at the end. Otherwise the source file is just
+      --  copied. The time stamps and other file attributes are
+      --  are preserved if the destination file does not exist.
+
+   type Attribute is
+     (Time_Stamps,
+      --  Copy time stamps from source file to target file. All other
+      --  attributes are set to normal default values for file creation.
+
+      Full,
+      --  All attributes are copied from the source file to the target
+      --  file. This includes the timestamps, and for example also includes
+      --  read/write/execute attributes in Unix systems.
+
+      None);
+      --  No attributes are copied. All attributes including the time stamp
+      --  values are set to normal default values for file creation.
+
+   --  Note: The default is Time_Stamps, which corresponds to the normal
+   --  default on Windows style systems. Full corresponds to the typical
+   --  effect of "cp -p" on Unix systems, and None corresponds to the
+   --  typical effect of "cp" on Unix systems.
+
+   --  Note: Time_Stamps and Full are not supported on VMS and VxWorks
+
+   procedure Copy_File
+     (Name     : String;
+      Pathname : String;
+      Success  : out Boolean;
+      Mode     : Copy_Mode := Copy;
+      Preserve : Attribute := Time_Stamps);
+   --  Copy a file. Name must designate a single file (no wild cards allowed).
+   --  Pathname can be a filename or directory name. In the latter case Name
+   --  is copied into the directory preserving the same file name. Mode
+   --  defines the kind of copy, see above with the default being a normal
+   --  copy in which the target file must not already exist. Success is set
+   --  to True or False indicating if the copy is successful (depending on
+   --  the specified Mode).
+   --
+   --  Note: this procedure is only supported to a very limited extent on
+   --  VMS. The only supported mode is Overwrite, and the only supported
+   --  value for Preserve is None, resulting in the default action which
+   --  for Overwrite is to leave attributes unchanged. Furthermore, the
+   --  copy only works for simple text files.
+
+   procedure Copy_Time_Stamps (Source, Dest : String; Success : out Boolean);
+   --  Copy Source file time stamps (last modification and last access time
+   --  stamps) to Dest file. Source and Dest must be valid filenames,
+   --  furthermore Dest must be writable. Success will be set to True if the
+   --  operation was successful and False otherwise.
+   --
+   --  Note: this procedure is not supported on VMS and VxWorks. On these
+   --  platforms, Success is always set to False.
 
    function Read
      (FD   : File_Descriptor;
@@ -248,15 +370,17 @@ pragma Elaborate_Body (OS_Lib);
 
    function File_Time_Stamp (Name : String) return OS_Time;
    --  Given the name of a file or directory, Name, obtains and returns the
-   --  time stamp. This function can be used for an unopend file.
+   --  time stamp. This function can be used for an unopened file.
 
    function File_Time_Stamp (FD : File_Descriptor) return OS_Time;
    --  Get time stamp of file from file descriptor FD
 
    function Normalize_Pathname
-     (Name      : String;
-      Directory : String := "")
-      return      String;
+     (Name           : String;
+      Directory      : String  := "";
+      Resolve_Links  : Boolean := True;
+      Case_Sensitive : Boolean := True)
+      return           String;
    --  Returns a file name as an absolute path name, resolving all relative
    --  directories, and symbolic links. The parameter Directory is a fully
    --  resolved path name for a directory, or the empty string (the default).
@@ -269,6 +393,11 @@ pragma Elaborate_Body (OS_Lib);
    --  not true; for example, this is not true in Unix for two hard links
    --  designating the same file.
    --
+   --  If Resolve_Links is set to True, then the symbolic links, on systems
+   --  that support them, will be fully converted to the name of the file
+   --  or directory pointed to. This is slightly less efficient, since it
+   --  requires system calls.
+   --
    --  If Name cannot be resolved or is null on entry (for example if there is
    --  a circularity in symbolic links: A is a symbolic link for B, while B is
    --  a symbolic link for A), then Normalize_Pathname returns an empty string.
@@ -276,6 +405,14 @@ pragma Elaborate_Body (OS_Lib);
    --  In VMS, if Name follows the VMS syntax file specification, it is first
    --  converted into Unix syntax. If the conversion fails, Normalize_Pathname
    --  returns an empty string.
+   --
+   --  For case-sensitive file systems, the value of Case_Sensitive parameter
+   --  is ignored. In systems that have a non case-sensitive file system like
+   --  Windows and OpenVMS, if this parameter is set OFF, then the result
+   --  is returned folded to lower case, this allows to checks if two files
+   --  are the same by applying this function to their names and by comparing
+   --  the results of these calls. If Case_Sensitive is ON, this function does
+   --  not change the casing of file and directory names.
 
    function Is_Absolute_Path (Name : String) return Boolean;
    --  Returns True if Name is an absolute path name, i.e. it designates
@@ -289,9 +426,30 @@ pragma Elaborate_Body (OS_Lib);
    --  Determines if the given string, Name, is the name of a directory.
    --  Returns True if so, False otherwise.
 
+   function Is_Readable_File (Name : String) return Boolean;
+   --  Determines if the given string, Name, is the name of an existing
+   --  file that is readable. Returns True if so, False otherwise. Note
+   --  that this function simply interrogates the file attributes (e.g.
+   --  using the C function stat), so it does not indicate a situation
+   --  in which a file may not actually be readable due to some other
+   --  process having exclusive access.
+
    function Is_Writable_File (Name : String) return Boolean;
    --  Determines if the given string, Name, is the name of an existing
-   --  file that is writable. Returns True if so, False otherwise.
+   --  file that is writable. Returns True if so, False otherwise. Note
+   --  that this function simply interrogates the file attributes (e.g.
+   --  using the C function stat), so it does not indicate a situation
+   --  in which a file may not actually be writeable due to some other
+   --  process having exclusive access.
+
+   function Is_Symbolic_Link (Name : String) return Boolean;
+   --  Determines if the given string, Name, is the path of a symbolic link
+   --  on systems that support it. Returns True if so, False if the path
+   --  is not a symbolic link or if the system does not support symbolic links.
+   --
+   --  A symbolic link is an indirect pointer to a file; its directory entry
+   --  contains the name of the file to which it is linked. Symbolic links may
+   --  span file systems and may refer to directories.
 
    function Locate_Exec_On_Path
      (Exec_Name : String)
@@ -312,7 +470,10 @@ pragma Elaborate_Body (OS_Lib);
    --  directories listed in  Path. If a file is found, its full pathname is
    --  returned; otherwise, a null pointer is returned. If the File_Name given
    --  is an absolute pathname, then Locate_Regular_File just checks that the
-   --  file exists and is a regular file. Otherwise, the Path argument is
+   --  file exists and is a regular file. Otherwise, if the File_Name given
+   --  includes directory information, Locate_Regular_File first checks if
+   --  the file exists relative to the current directory. If it does not,
+   --  or if the File_Name given is a simple file name, the Path argument is
    --  parsed according to OS conventions, and for each directory in the Path
    --  a check is made if File_Name is a relative pathname of a regular file
    --  from that directory.
@@ -338,7 +499,7 @@ pragma Elaborate_Body (OS_Lib);
    --  The following section contains low-level routines using addresses to
    --  pass file name and executable name. In each routine the name must be
    --  Nul-Terminated. For complete documentation refer to the equivalent
-   --  routine (but using string) defined above.
+   --  routine (using String in place of C_File_Name) defined above.
 
    subtype C_File_Name is System.Address;
    --  This subtype is used to document that a parameter is the address
@@ -371,13 +532,26 @@ pragma Elaborate_Body (OS_Lib);
       New_Name : C_File_Name;
       Success  : out Boolean);
 
+   procedure Copy_File
+     (Name     : C_File_Name;
+      Pathname : C_File_Name;
+      Success  : out Boolean;
+      Mode     : Copy_Mode := Copy;
+      Preserve : Attribute := Time_Stamps);
+
+   procedure Copy_Time_Stamps
+     (Source, Dest : C_File_Name;
+      Success      : out Boolean);
+
    function File_Time_Stamp (Name : C_File_Name) return OS_Time;
 
    function Is_Regular_File (Name : C_File_Name) return Boolean;
 
    function Is_Directory (Name : C_File_Name) return Boolean;
 
+   function Is_Readable_File (Name : C_File_Name) return Boolean;
    function Is_Writable_File (Name : C_File_Name) return Boolean;
+   function Is_Symbolic_Link (Name : C_File_Name) return Boolean;
 
    function Locate_Regular_File
      (File_Name : C_File_Name;
@@ -405,7 +579,7 @@ pragma Elaborate_Body (OS_Lib);
    --  on the same list it will do nothing the second time. Note that Spawn
    --  and Non_Blocking_Spawn call Normalize_Arguments automatically, but
    --  since there is a guarantee that a second call does nothing, this
-   --  internal call with have no effect if Normalize_Arguments is called
+   --  internal call will have no effect if Normalize_Arguments is called
    --  before calling Spawn. The call to Normalize_Arguments assumes that
    --  the individual referenced arguments in Argument_List are on the heap,
    --  and may free them and reallocate if they are modified.
@@ -423,6 +597,8 @@ pragma Elaborate_Body (OS_Lib);
    --  argument. On some systems (notably Unix systems) a simple file
    --  name may also work (if the executable can be located in the path).
    --
+   --  "Spawn" should not be used in tasking applications.
+   --
    --  Note: Arguments in Args that contain spaces and/or quotes such as
    --  "--GCC=gcc -v" or "--GCC=""gcc -v""" are not portable across all
    --  operating systems, and would not have the desired effect if they
@@ -448,6 +624,9 @@ pragma Elaborate_Body (OS_Lib);
    --  Similar to the above procedure, but returns the actual status returned
    --  by the operating system, or -1 under VxWorks and any other similar
    --  operating systems which have no notion of separately spawnable programs.
+   --
+   --  "Spawn" should not be used in tasking applications.
+   --
 
    type Process_Id is private;
    --  A private type used to identify a process activated by the following
@@ -465,6 +644,8 @@ pragma Elaborate_Body (OS_Lib);
    --  is returned. Parameters are to be used as in Spawn. If Invalid_Id
    --  is returned the program could not be spawned.
    --
+   --  "Non_Blocking_Spawn" should not be used in tasking applications.
+   --
    --  This function will always return Invalid_Id under VxWorks, since
    --  there is no notion of executables under this OS.
 
@@ -485,7 +666,7 @@ pragma Elaborate_Body (OS_Lib);
    function Argument_String_To_List
      (Arg_String : String)
       return       Argument_List_Access;
-   --  Take a string that is a program and it's arguments and parse it into
+   --  Take a string that is a program and its arguments and parse it into
    --  an Argument_List. Note that the result is allocated on the heap, and
    --  must be freed by the programmer (when it is no longer needed) to avoid
    --  memory leaks.
@@ -545,14 +726,21 @@ private
    pragma Import (C, Path_Separator, "__gnat_path_separator");
    pragma Import (C, Directory_Separator, "__gnat_dir_separator");
 
-   type OS_Time is new Integer;
-
-   type File_Descriptor is new Integer;
-
-   Standin    : constant File_Descriptor :=  0;
-   Standout   : constant File_Descriptor :=  1;
-   Standerr   : constant File_Descriptor :=  2;
-   Invalid_FD : constant File_Descriptor := -1;
+   type OS_Time is new Long_Integer;
+   --  Type used for timestamps in the compiler. This type is used to
+   --  hold time stamps, but may have a different representation than
+   --  C's time_t. This type needs to match the declaration of OS_Time
+   --  in adaint.h.
+
+   --  Add pragma Inline statements for comparison operations on OS_Time.
+   --  It would actually be nice to use pragma Import (Intrinsic) here,
+   --  but this was not properly supported till GNAT 3.15a, so that would
+   --  cause bootstrap path problems. To be changed later ???
+
+   pragma Inline ("<");
+   pragma Inline (">");
+   pragma Inline ("<=");
+   pragma Inline (">=");
 
    type Process_Id is new Integer;
    Invalid_Pid : constant Process_Id := -1;