Re: -ffunction-sections -fdata-sections vs. string-inst

[Loren James Rittle <rittle at latour dot rsch dot comm dot mot dot com>]

Benjamin,

I had libstdc++-v3 testsuite output for a freshly-bootstrapped,
unpatched-mainline CVS tree.  I added your patch, rebuilt all derived
$src files with the steps listed in $src/libstdc++-v3/configure.in,
ran ``make clean'' in $obj/libstdc++-v3, reconfigured in
$obj/libstdc++-v3, ran ``make Makefile'' at all levels in
$obj/libstdc++-v3 (for some reason this was not done automatically),
make, chmod +x mkcheck (for some reason whenever it is recreated, it
gets the wrong permission on my system), make check.

Most tests appear to get smaller.  However, for some reason, some
tests appear to get *much* larger now.  E.g. see 21_strings/append.cc.
I am rerunning the entire bootstrap to verify that I didn't somehow
mess up the libstdc++ rebuild process.  Will report tomorrow.

Regards,
Loren

Below are the relevant changes in testsuite output (produced with this
handy es shell line:  diff -u \
  <{awk <test1 '{printf "%d\t%d\t%d\t%s\n", $4, $5, $6, $7}'} \
  <{awk <test2 '{printf "%d\t%d\t%d\t%s\n", $4, $5, $6, $7}'} | grep '^[-+]' ):

--- /dev/fd/3	Fri Jan  7 13:49:20 2000
+++ /dev/fd/4	Fri Jan  7 13:49:20 2000
-199020	8549	1490930	17_intro/header_iostream.cc
+197268	8933	1382933	17_intro/header_iostream.cc
-199020	8549	1542009	17_intro/headers.cc
+197268	8933	1433988	17_intro/headers.cc
-63208	4504	345986	21_strings/append.cc
-13525	642	116031	21_strings/append.cc
+201504	9605	1403850	21_strings/append.cc
+13525	642	124347	21_strings/append.cc
-68984	4216	345588	21_strings/capacity.cc
-19464	380	171454	21_strings/capacity.cc
+70304	4224	349027	21_strings/capacity.cc
+19464	380	178160	21_strings/capacity.cc
-54008	4120	252518	21_strings/char_traits.cc
-4488	256	75057	21_strings/char_traits.cc
+55452	4128	256094	21_strings/char_traits.cc
+4488	256	77838	21_strings/char_traits.cc
-58276	4184	266264	21_strings/compare.cc
-8364	332	89811	21_strings/compare.cc
+59696	4192	269848	21_strings/compare.cc
+8364	332	95169	21_strings/compare.cc
-59456	4216	279269	21_strings/ctor_copy_dtor.cc
-10125	370	104351	21_strings/ctor_copy_dtor.cc
+60860	4224	282837	21_strings/ctor_copy_dtor.cc
+10125	370	110690	21_strings/ctor_copy_dtor.cc
-54720	4248	257626	21_strings/element_access.cc
-5353	394	81173	21_strings/element_access.cc
+56128	4256	261198	21_strings/element_access.cc
+5353	394	84937	21_strings/element_access.cc
-59032	4088	321122	21_strings/find.cc
-9332	252	87363	21_strings/find.cc
+202928	9189	1386245	21_strings/find.cc
+9332	252	90332	21_strings/find.cc
-61452	4696	284756	21_strings/insert.cc
-11985	854	110935	21_strings/insert.cc
+62856	4704	288324	21_strings/insert.cc
+11985	854	118078	21_strings/insert.cc
-212120	10373	1656440	21_strings/inserters_extractors.cc
-22139	1284	229335	21_strings/inserters_extractors.cc
+204588	10181	1469116	21_strings/inserters_extractors.cc
+22139	1284	236384	21_strings/inserters_extractors.cc
-62276	4248	282986	21_strings/invariants.cc
-12604	384	106839	21_strings/invariants.cc
+63596	4256	286425	21_strings/invariants.cc
+12604	384	112923	21_strings/invariants.cc
-67020	4248	288108	21_strings/nonmember.cc
-17348	384	113473	21_strings/nonmember.cc
+68440	4256	291679	21_strings/nonmember.cc
+17348	384	119682	21_strings/nonmember.cc
-55788	4120	261718	21_strings/operations.cc
-6320	268	86391	21_strings/operations.cc
+57108	4128	265157	21_strings/operations.cc
+6320	268	91145	21_strings/operations.cc
-61252	4184	288001	21_strings/replace.cc
-11580	324	112544	21_strings/replace.cc
+62656	4192	291524	21_strings/replace.cc
+11580	324	118928	21_strings/replace.cc
-55952	4184	265919	21_strings/substr.cc
-6569	342	90631	21_strings/substr.cc
+57360	4192	269491	21_strings/substr.cc
+6569	342	95876	21_strings/substr.cc
-199856	8645	1482138	22_locale/ctype.cc
+198096	9029	1374119	22_locale/ctype.cc
-201180	8901	1479908	22_locale/ctype_char_members.cc
-2472	379	86603	22_locale/ctype_char_members.cc
+198988	9285	1371366	22_locale/ctype_char_members.cc
+2472	379	86775	22_locale/ctype_char_members.cc
-61084	4312	337906	23_containers/bitset_ctor.cc
-11653	458	162775	23_containers/bitset_ctor.cc
+62076	4320	340994	23_containers/bitset_ctor.cc
+11653	458	168328	23_containers/bitset_ctor.cc
-72968	4184	381687	23_containers/bitset_shift.cc
-23825	332	205945	23_containers/bitset_shift.cc
+73960	4192	384788	23_containers/bitset_shift.cc
+23825	332	209190	23_containers/bitset_shift.cc
-205512	8549	1561702	23_containers/multiset.cc
-7140	18	165110	23_containers/multiset.cc
+203348	8933	1453069	23_containers/multiset.cc
+7140	18	165365	23_containers/multiset.cc
-7856	204	79426	23_containers/vector_capacity.cc
+7856	204	79628	23_containers/vector_capacity.cc
-226592	8773	1625864	23_containers/vector_ctor.cc
-28152	208	186056	23_containers/vector_ctor.cc
+224552	9125	1517399	23_containers/vector_ctor.cc
+28152	208	186258	23_containers/vector_ctor.cc
-13084	204	122369	23_containers/vector_modifiers.cc
+13084	204	122571	23_containers/vector_modifiers.cc
-206984	9221	1534734	24_iterators/istreambuf_iterator.cc
-12727	676	175281	24_iterators/istreambuf_iterator.cc
+201680	9573	1420967	24_iterators/istreambuf_iterator.cc
+12727	676	180545	24_iterators/istreambuf_iterator.cc
-78120	4088	435704	24_iterators/iterator.cc
-28600	228	259510	24_iterators/iterator.cc
+79440	4096	439143	24_iterators/iterator.cc
+28600	228	269453	24_iterators/iterator.cc
-753	200	20563	25_algorithms/min_max.cc
+753	200	20659	25_algorithms/min_max.cc
-203304	8549	1616664	26_numerics/binary_closure.cc
-4799	20	219169	26_numerics/binary_closure.cc
+201516	8933	1508595	26_numerics/binary_closure.cc
+4799	20	219273	26_numerics/binary_closure.cc
-733	1	9174	26_numerics/buggy_complex.cc
+733	1	9309	26_numerics/buggy_complex.cc
-215472	9541	1617090	26_numerics/complex_inserters_extractors.cc
-15631	804	178464	26_numerics/complex_inserters_extractors.cc
+208268	9829	1468102	26_numerics/complex_inserters_extractors.cc
+15631	804	182787	26_numerics/complex_inserters_extractors.cc
-659	12	50274	26_numerics/valarray.cc
+659	12	50378	26_numerics/valarray.cc
-212688	9509	1535213	27_io/filebuf.cc
-18307	980	188018	27_io/filebuf.cc
+208756	9925	1423906	27_io/filebuf.cc
+18307	980	191261	27_io/filebuf.cc
-2761	188	69835	27_io/fpos.cc
+2761	188	70163	27_io/fpos.cc
-204384	9093	1543378	27_io/ios_base_callbacks.cc
-9503	552	159453	27_io/ios_base_callbacks.cc
+198208	9445	1429150	27_io/ios_base_callbacks.cc
+9503	552	165108	27_io/ios_base_callbacks.cc
-202484	9029	1511762	27_io/ios_base_members_static.cc
-7148	481	149370	27_io/ios_base_members_static.cc
+197992	9381	1399596	27_io/ios_base_members_static.cc
+7148	481	153355	27_io/ios_base_members_static.cc
-204208	8997	1538225	27_io/ios_ctor.cc
-9451	456	154230	27_io/ios_ctor.cc
+199596	9349	1425751	27_io/ios_ctor.cc
+9451	456	158505	27_io/ios_ctor.cc
-206332	9221	1552708	27_io/ios_manip_basefield.cc
-13467	671	190141	27_io/ios_manip_basefield.cc
+191312	9253	1382042	27_io/ios_manip_basefield.cc
+13467	671	195205	27_io/ios_manip_basefield.cc
-207024	9253	1566399	27_io/ios_manip_fmtflags.cc
-15199	723	196195	27_io/ios_manip_fmtflags.cc
+201924	9637	1453241	27_io/ios_manip_fmtflags.cc
+15199	723	201664	27_io/ios_manip_fmtflags.cc
-202936	8901	1495216	27_io/ios_members.cc
-5815	360	103374	27_io/ios_members.cc
+198984	9285	1383651	27_io/ios_members.cc
+5815	360	106416	27_io/ios_members.cc
-199460	8613	1567718	27_io/iostream_objects.cc
-968	76	180588	27_io/iostream_objects.cc
+197580	8997	1459461	27_io/iostream_objects.cc
+968	76	180823	27_io/iostream_objects.cc
-213812	10053	1583276	27_io/istream_extractor_arith.cc
-23219	1512	217614	27_io/istream_extractor_arith.cc
+209112	10405	1470853	27_io/istream_extractor_arith.cc
+23219	1512	221956	27_io/istream_extractor_arith.cc
-209408	9317	1554306	27_io/istream_extractor_char.cc
-15175	780	173127	27_io/istream_extractor_char.cc
+203956	9669	1441070	27_io/istream_extractor_char.cc
+15175	780	177361	27_io/istream_extractor_char.cc
-209340	9317	1557528	27_io/istream_extractor_other.cc
-15654	780	190323	27_io/istream_extractor_other.cc
+203420	9669	1443583	27_io/istream_extractor_other.cc
+15654	780	195807	27_io/istream_extractor_other.cc
-205832	9413	1570080	27_io/istream_manip.cc
-10063	644	165078	27_io/istream_manip.cc
+199292	9541	1433376	27_io/istream_manip.cc
+10063	644	169625	27_io/istream_manip.cc
-202724	9093	1540390	27_io/istream_sentry.cc
-8151	556	156936	27_io/istream_sentry.cc
+198264	9445	1428339	27_io/istream_sentry.cc
+8151	556	160976	27_io/istream_sentry.cc
-224284	9989	1571585	27_io/istream_unformatted.cc
-32143	1452	218434	27_io/istream_unformatted.cc
+209764	10021	1401460	27_io/istream_unformatted.cc
+32143	1452	223571	27_io/istream_unformatted.cc
-203868	9253	1527825	27_io/istringstream_members.cc
-10691	708	171500	27_io/istringstream_members.cc
+198316	9605	1414073	27_io/istringstream_members.cc
+10691	708	176878	27_io/istringstream_members.cc
-214532	9733	1596363	27_io/ostream_inserter_arith.cc
-22833	1083	207736	27_io/ostream_inserter_arith.cc
+209192	9989	1463686	27_io/ostream_inserter_arith.cc
+22833	1083	213043	27_io/ostream_inserter_arith.cc
-210956	9829	1592163	27_io/ostream_inserter_char.cc
-21743	1188	214591	27_io/ostream_inserter_char.cc
+205780	10085	1459211	27_io/ostream_inserter_char.cc
+21743	1188	221382	27_io/ostream_inserter_char.cc
-201760	9637	1550044	27_io/ostream_inserter_other.cc
-10679	1088	187661	27_io/ostream_inserter_other.cc
+198676	9989	1439298	27_io/ostream_inserter_other.cc
+10679	1088	192006	27_io/ostream_inserter_other.cc
-203972	9157	1549823	27_io/ostream_manip.cc
-12131	612	172089	27_io/ostream_manip.cc
+199348	9509	1437159	27_io/ostream_manip.cc
+12131	612	177513	27_io/ostream_manip.cc
-202064	9221	1516522	27_io/ostream_unformatted.cc
-7800	673	156312	27_io/ostream_unformatted.cc
+197980	9573	1404749	27_io/ostream_unformatted.cc
+7800	673	160344	27_io/ostream_unformatted.cc
-209740	9221	1529643	27_io/streambuf.cc
-14227	692	143724	27_io/streambuf.cc
+203220	9605	1415134	27_io/streambuf.cc
+14227	692	149104	27_io/streambuf.cc
-219576	9157	1564952	27_io/stringbuf.cc
-25835	628	183359	27_io/stringbuf.cc
+213264	9541	1450261	27_io/stringbuf.cc
+25835	628	189320	27_io/stringbuf.cc
-206820	9573	1576357	27_io/stringstream.cc
-15572	1046	196067	27_io/stringstream.cc
+201724	9957	1462928	27_io/stringstream.cc
+15572	1046	202098	27_io/stringstream.cc
-199020	8709	1593117	ext/headers.cc
+197268	9093	1485096	ext/headers.cc