summaryrefslogtreecommitdiff
path: root/eclass/toolchain-glibc.eclass
blob: a0a407882d60f131976eba79506a202c4ea9fea0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
# Copyright 1999-2019 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

# @DEAD

# @ECLASS: toolchain-glibc.eclass
# @MAINTAINER:
# <toolchain@gentoo.org>
# @SUPPORTED_EAPIS: 0 1 2 3 4 5 6
# @BLURB: Common code for sys-libs/glibc ebuilds
# @DESCRIPTION:
# This eclass contains the common phase functions migrated from
# sys-libs/glibc eblits.

if [[ -z ${_TOOLCHAIN_GLIBC_ECLASS} ]]; then

TMPFILES_OPTIONAL=1

inherit eutils versionator toolchain-funcs flag-o-matic gnuconfig \
	multilib systemd tmpfiles unpacker multiprocessing prefix

case ${EAPI:-0} in
	0|1|2|3) EXPORT_FUNCTIONS pkg_setup src_unpack src_compile src_test \
		src_install pkg_preinst pkg_postinst;;
	2|3) EXPORT_FUNCTIONS pkg_setup src_unpack src_prepare src_configure \
		src_compile src_test src_install pkg_preinst pkg_postinst;;
	4|5) EXPORT_FUNCTIONS pkg_pretend pkg_setup src_unpack src_prepare \
		src_configure src_compile src_test src_install \
		pkg_preinst pkg_postinst;;
	6) EXPORT_FUNCTIONS pkg_pretend;;
	*) die "Unsupported EAPI=${EAPI}";;
esac

# == common ==

alt_prefix() {
	is_crosscompile && echo /usr/${CTARGET}
}

if [[ ${EAPI:-0} == [012] ]] ; then
	: ${ED:=${D}}
	: ${EROOT:=${ROOT}}
fi
# This indirection is for binpkgs. #523332
_nonfatal() { nonfatal "$@" ; }
if [[ ${EAPI:-0} == [0123] ]] ; then
	nonfatal() { "$@" ; }
	_nonfatal() { "$@" ; }
fi

# We need to be able to set alternative headers for
# compiling for non-native platform
# Will also become useful for testing kernel-headers without screwing up
# the whole system.
# note: intentionally undocumented.
alt_headers() {
	echo ${ALT_HEADERS:=$(alt_prefix)/usr/include}
}
alt_build_headers() {
	if [[ -z ${ALT_BUILD_HEADERS} ]] ; then
		ALT_BUILD_HEADERS="${EPREFIX}$(alt_headers)"
		if tc-is-cross-compiler ; then
			ALT_BUILD_HEADERS=${SYSROOT}$(alt_headers)
			if [[ ! -e ${ALT_BUILD_HEADERS}/linux/version.h ]] ; then
				local header_path=$(echo '#include <linux/version.h>' | $(tc-getCPP ${CTARGET}) ${CFLAGS} 2>&1 | grep -o '[^"]*linux/version.h')
				ALT_BUILD_HEADERS=${header_path%/linux/version.h}
			fi
		fi
	fi
	echo "${ALT_BUILD_HEADERS}"
}

alt_libdir() {
	echo $(alt_prefix)/$(get_libdir)
}
alt_usrlibdir() {
	echo $(alt_prefix)/usr/$(get_libdir)
}

builddir() {
	echo "${WORKDIR}/build-${ABI}-${CTARGET}-$1"
}

setup_target_flags() {
	# This largely mucks with compiler flags.  None of which should matter
	# when building up just the headers.
	just_headers && return 0

	case $(tc-arch) in
		x86)
			# -march needed for #185404 #199334
			# TODO: When creating the first glibc cross-compile, this test will
			# always fail as it does a full link which in turn requires glibc.
			# Probably also applies when changing multilib profile settings (e.g.
			# enabling x86 when the profile was amd64-only previously).
			# We could change main to _start and pass -nostdlib here so that we
			# only test the gcc code compilation.  Or we could do a compile and
			# then look for the symbol via scanelf.
			if ! glibc_compile_test "" 'void f(int i, void *p) {if (__sync_fetch_and_add(&i, 1)) f(i, p);}\nint main(){return 0;}\n' 2>/dev/null ; then
				local t=${CTARGET_OPT:-${CTARGET}}
				t=${t%%-*}
				filter-flags '-march=*'
				export CFLAGS="-march=${t} ${CFLAGS}"
				einfo "Auto adding -march=${t} to CFLAGS #185404"
			fi
		;;
		amd64)
			# -march needed for #185404 #199334
			# Note: This test only matters when the x86 ABI is enabled, so we could
			# optimize a bit and elide it.
			# TODO: See cross-compile issues listed above for x86.
			if ! glibc_compile_test "${CFLAGS_x86}" 'void f(int i, void *p) {if (__sync_fetch_and_add(&i, 1)) f(i, p);}\nint main(){return 0;}\n' 2>/dev/null ; then
				local t=${CTARGET_OPT:-${CTARGET}}
				t=${t%%-*}
				# Normally the target is x86_64-xxx, so turn that into the -march that
				# gcc actually accepts. #528708
				[[ ${t} == "x86_64" ]] && t="x86-64"
				filter-flags '-march=*'
				# ugly, ugly, ugly.  ugly.
				CFLAGS_x86=$(CFLAGS=${CFLAGS_x86} filter-flags '-march=*'; echo "${CFLAGS}")
				export CFLAGS_x86="${CFLAGS_x86} -march=${t}"
				einfo "Auto adding -march=${t} to CFLAGS_x86 #185404"
			fi
		;;
		mips)
			# The mips abi cannot support the GNU style hashes. #233233
			filter-ldflags -Wl,--hash-style=gnu -Wl,--hash-style=both
		;;
		sparc)
			# Both sparc and sparc64 can use -fcall-used-g6.  -g7 is bad, though.
			filter-flags "-fcall-used-g7"
			append-flags "-fcall-used-g6"

			# If the CHOST is the basic one (e.g. not sparcv9-xxx already),
			# try to pick a better one so glibc can use cpu-specific .S files.
			# We key off the CFLAGS to get a good value.  Also need to handle
			# version skew.
			# We can't force users to set their CHOST to their exact machine
			# as many of these are not recognized by config.sub/gcc and such :(.
			# Note: If the mcpu values don't scale, we might try probing CPP defines.
			# Note: Should we factor in -Wa,-AvXXX flags too ?  Or -mvis/etc... ?

			local cpu
			case ${CTARGET} in
			sparc64-*)
				case $(get-flag mcpu) in
				niagara[234])
					if version_is_at_least 2.8 ; then
						cpu="sparc64v2"
					elif version_is_at_least 2.4 ; then
						cpu="sparc64v"
					elif version_is_at_least 2.2.3 ; then
						cpu="sparc64b"
					fi
					;;
				niagara)
					if version_is_at_least 2.4 ; then
						cpu="sparc64v"
					elif version_is_at_least 2.2.3 ; then
						cpu="sparc64b"
					fi
					;;
				ultrasparc3)
					cpu="sparc64b"
					;;
				*)
					# We need to force at least v9a because the base build doesn't
					# work with just v9.
					# https://sourceware.org/bugzilla/show_bug.cgi?id=19477
					[[ -z ${cpu} ]] && append-flags "-Wa,-xarch=v9a"
					;;
				esac
				;;
			sparc-*)
				case $(get-flag mcpu) in
				niagara[234])
					if version_is_at_least 2.8 ; then
						cpu="sparcv9v2"
					elif version_is_at_least 2.4 ; then
						cpu="sparcv9v"
					elif version_is_at_least 2.2.3 ; then
						cpu="sparcv9b"
					else
						cpu="sparcv9"
					fi
					;;
				niagara)
					if version_is_at_least 2.4 ; then
						cpu="sparcv9v"
					elif version_is_at_least 2.2.3 ; then
						cpu="sparcv9b"
					else
						cpu="sparcv9"
					fi
					;;
				ultrasparc3)
					cpu="sparcv9b"
					;;
				v9|ultrasparc)
					cpu="sparcv9"
					;;
				v8|supersparc|hypersparc|leon|leon3)
					cpu="sparcv8"
					;;
				esac
			;;
			esac
			[[ -n ${cpu} ]] && CTARGET_OPT="${cpu}-${CTARGET#*-}"
		;;
	esac
}

setup_flags() {
	# Make sure host make.conf doesn't pollute us
	if is_crosscompile || tc-is-cross-compiler ; then
		CHOST=${CTARGET} strip-unsupported-flags
	fi

	# Store our CFLAGS because it's changed depending on which CTARGET
	# we are building when pulling glibc on a multilib profile
	CFLAGS_BASE=${CFLAGS_BASE-${CFLAGS}}
	CFLAGS=${CFLAGS_BASE}
	CXXFLAGS_BASE=${CXXFLAGS_BASE-${CXXFLAGS}}
	CXXFLAGS=${CXXFLAGS_BASE}
	ASFLAGS_BASE=${ASFLAGS_BASE-${ASFLAGS}}
	ASFLAGS=${ASFLAGS_BASE}

	# Over-zealous CFLAGS can often cause problems.  What may work for one
	# person may not work for another.  To avoid a large influx of bugs
	# relating to failed builds, we strip most CFLAGS out to ensure as few
	# problems as possible.
	strip-flags
	strip-unsupported-flags
	filter-flags -m32 -m64 -mabi=*
	filter-ldflags -Wl,-rpath=*

	# Bug 492892.
	filter-flags -frecord-gcc-switches

	unset CBUILD_OPT CTARGET_OPT
	if use multilib ; then
		CTARGET_OPT=$(get_abi_CTARGET)
		[[ -z ${CTARGET_OPT} ]] && CTARGET_OPT=$(get_abi_CHOST)
	fi

	setup_target_flags

	if [[ -n ${CTARGET_OPT} && ${CBUILD} == ${CHOST} ]] && ! is_crosscompile; then
		CBUILD_OPT=${CTARGET_OPT}
	fi

	# Lock glibc at -O2 -- linuxthreads needs it and we want to be
	# conservative here.  -fno-strict-aliasing is to work around #155906
	filter-flags -O?
	append-flags -O2 -fno-strict-aliasing

	# Can't build glibc itself with fortify code.  Newer versions add
	# this flag for us, so no need to do it manually.
	version_is_at_least 2.16 ${PV} || append-cppflags -U_FORTIFY_SOURCE

	# building glibc <2.25 with SSP is fraught with difficulty, especially
	# due to __stack_chk_fail_local which would mean significant changes
	# to the glibc build process. See bug #94325 #293721
	# Note we have to handle both user-given CFLAGS and gcc defaults via
	# spec rules here.  We can't simply add -fno-stack-protector as it gets
	# added before user flags, and we can't just filter-flags because
	# _filter_hardened doesn't support globs.
	filter-flags -fstack-protector*
	if ! version_is_at_least 2.25 ; then
		tc-enables-ssp && append-flags $(test-flags -fno-stack-protector)
	fi

	if [[ $(gcc-major-version) -lt 6 ]]; then
		# Starting with gcc-6 (and fully upstreamed pie patches) we control
		# default enabled/disabled pie via use flags. So nothing to do
		# here. #618160

		if use hardened && tc-enables-pie ; then
			# Force PIC macro definition for all compilations since they're all
			# either -fPIC or -fPIE with the default-PIE compiler.
			append-cppflags -DPIC
		else
			# Don't build -fPIE without the default-PIE compiler and the
			# hardened-pie patch
			filter-flags -fPIE
		fi
	fi
}

want_nptl() {
	[[ -z ${LT_VER} ]] && return 0
	want_tls || return 1
	use nptl || return 1

	# Older versions of glibc had incomplete arch support for nptl.
	# But if you're building those now, you can handle USE=nptl yourself.
	return 0
}

want_linuxthreads() {
	[[ -z ${LT_VER} ]] && return 1
	use linuxthreads
}

want_tls() {
	# Archs that can use TLS (Thread Local Storage)
	case $(tc-arch) in
		x86)
			# requires i486 or better #106556
			[[ ${CTARGET} == i[4567]86* ]] && return 0
			return 1
		;;
	esac

	return 0
}

want__thread() {
	want_tls || return 1

	# For some reason --with-tls --with__thread is causing segfaults on sparc32.
	[[ ${PROFILE_ARCH} == "sparc" ]] && return 1

	[[ -n ${WANT__THREAD} ]] && return ${WANT__THREAD}

	# only test gcc -- can't test linking yet
	tc-has-tls -c ${CTARGET}
	WANT__THREAD=$?

	return ${WANT__THREAD}
}

use_multiarch() {
	# Make sure binutils is new enough to support indirect functions #336792
	# This funky sed supports gold and bfd linkers.
	local bver nver
	bver=$($(tc-getLD ${CTARGET}) -v | sed -n -r '1{s:[^0-9]*::;s:^([0-9.]*).*:\1:;p}')
	case $(tc-arch ${CTARGET}) in
	amd64|x86) nver="2.20" ;;
	arm)       nver="2.22" ;;
	hppa)      nver="2.23" ;;
	ppc|ppc64) nver="2.20" ;;
	# ifunc was added in 2.23, but glibc also needs machinemode which is in 2.24.
	s390)      nver="2.24" ;;
	sparc)     nver="2.21" ;;
	*)         return 1 ;;
	esac
	version_is_at_least ${nver} ${bver}
}

# Setup toolchain variables that had historically
# been defined in the profiles for these archs.
setup_env() {
	# silly users
	unset LD_RUN_PATH
	unset LD_ASSUME_KERNEL

	if is_crosscompile || tc-is-cross-compiler ; then
		multilib_env ${CTARGET_OPT:-${CTARGET}}

		if ! use multilib ; then
			MULTILIB_ABIS=${DEFAULT_ABI}
		else
			MULTILIB_ABIS=${MULTILIB_ABIS:-${DEFAULT_ABI}}
		fi

		# If the user has CFLAGS_<CTARGET> in their make.conf, use that,
		# and fall back on CFLAGS.
		local VAR=CFLAGS_${CTARGET//[-.]/_}
		CFLAGS=${!VAR-${CFLAGS}}
		einfo " $(printf '%15s' 'Manual CFLAGS:')   ${CFLAGS}"
	fi

	setup_flags

	export ABI=${ABI:-${DEFAULT_ABI:-default}}

	if just_headers ; then
		# Avoid mixing host's CC and target's CFLAGS_${ABI}:
		# At this bootstrap stage we have only binutils for
		# target but not compiler yet.
		einfo "Skip CC ABI injection. We can't use (cross-)compiler yet."
		return 0
	fi

	local VAR=CFLAGS_${ABI}
	# We need to export CFLAGS with abi information in them because glibc's
	# configure script checks CFLAGS for some targets (like mips).  Keep
	# around the original clean value to avoid appending multiple ABIs on
	# top of each other.
	: ${__GLIBC_CC:=$(tc-getCC ${CTARGET_OPT:-${CTARGET}})}
	export __GLIBC_CC CC="${__GLIBC_CC} ${!VAR}"
	einfo " $(printf '%15s' 'Manual CC:')   ${CC}"
}

foreach_abi() {
	setup_env

	local ret=0
	local abilist=""
	if use multilib ; then
		abilist=$(get_install_abis)
	else
		abilist=${DEFAULT_ABI}
	fi
	local -x ABI
	for ABI in ${abilist:-default} ; do
		setup_env
		einfo "Running $1 for ABI ${ABI}"
		$1
		: $(( ret |= $? ))
	done
	return ${ret}
}

just_headers() {
	is_crosscompile && use headers-only
}

glibc_banner() {
	local b="Gentoo ${PVR}"
	[[ -n ${SNAP_VER} ]] && b+=" snapshot ${SNAP_VER}"
	[[ -n ${PATCH_VER} ]] && ! use vanilla && b+=" p${PATCH_VER}"
	echo "${b}"
}

# == phases ==

glibc_compile_test() {
	local ret save_cflags=${CFLAGS}
	CFLAGS+=" $1"
	shift

	pushd "${T}" >/dev/null

	rm -f glibc-test*
	printf '%b' "$*" > glibc-test.c

	_nonfatal emake -s glibc-test
	ret=$?

	popd >/dev/null

	CFLAGS=${save_cflags}
	return ${ret}
}

glibc_run_test() {
	local ret

	if [[ ${EMERGE_FROM} == "binary" ]] ; then
		# ignore build failures when installing a binary package #324685
		glibc_compile_test "" "$@" 2>/dev/null || return 0
	else
		if ! glibc_compile_test "" "$@" ; then
			ewarn "Simple build failed ... assuming this is desired #324685"
			return 0
		fi
	fi

	pushd "${T}" >/dev/null

	./glibc-test
	ret=$?
	rm -f glibc-test*

	popd >/dev/null

	return ${ret}
}

check_devpts() {
	# Make sure devpts is mounted correctly for use w/out setuid pt_chown.

	# If merely building the binary package, then there's nothing to verify.
	[[ ${MERGE_TYPE} == "buildonly" ]] && return

	# Only sanity check when installing the native glibc.
	[[ ${ROOT} != "/" ]] && return

	# Older versions always installed setuid, so no need to check.
	in_iuse suid || return

	# If they're opting in to the old suid code, then no need to check.
	use suid && return

	if awk '$3 == "devpts" && $4 ~ /[, ]gid=5[, ]/ { exit 1 }' /proc/mounts ; then
		eerror "In order to use glibc with USE=-suid, you must make sure that"
		eerror "you have devpts mounted at /dev/pts with the gid=5 option."
		eerror "Openrc should do this for you, so you should check /etc/fstab"
		eerror "and make sure you do not have any invalid settings there."
		# Do not die on older kernels as devpts did not export these settings #489520.
		if version_is_at_least 2.6.25 $(uname -r) ; then
			die "mount & fix your /dev/pts settings"
		fi
	fi
}

toolchain-glibc_pkg_pretend() {
	if [[ ${EAPI:-0} == 6 ]]; then
		eerror "We're moving code back to the ebuilds to get away from the ancient EAPI cruft."
		eerror "From EAPI=6 on you'll have to define the phases in the glibc ebuilds."
		die "Silly overlay authors..."
	fi

	# For older EAPIs, this is run in pkg_preinst.
	if [[ ${EAPI:-0} != [0123] ]] ; then
		check_devpts
	fi

	# Prevent native builds from downgrading.
	if [[ ${MERGE_TYPE} != "buildonly" ]] && \
	   [[ ${ROOT} == "/" ]] && \
	   [[ ${CBUILD} == ${CHOST} ]] && \
	   [[ ${CHOST} == ${CTARGET} ]] ; then
		# The high rev # is to allow people to downgrade between -r# versions.
		# We want to block 2.20->2.19, but 2.20-r3->2.20-r2 should be fine.
		# Hopefully we never actually use a r# this high.
		if has_version ">${CATEGORY}/${P}-r10000" ; then
			eerror "Sanity check to keep you from breaking your system:"
			eerror " Downgrading glibc is not supported and a sure way to destruction"
			[[ ${I_ALLOW_TO_BREAK_MY_SYSTEM} = yes ]] || die "Aborting to save your system."
		fi

		if ! glibc_run_test '#include <pwd.h>\nint main(){return getpwuid(0)==0;}\n'
		then
			eerror "Your patched vendor kernel is broken.  You need to get an"
			eerror "update from whoever is providing the kernel to you."
			eerror "https://sourceware.org/bugzilla/show_bug.cgi?id=5227"
			eerror "http://bugs.gentoo.org/262698"
			die "keeping your system alive, say thank you"
		fi

		if ! glibc_run_test '#include <unistd.h>\n#include <sys/syscall.h>\nint main(){return syscall(1000)!=-1;}\n'
		then
			eerror "Your old kernel is broken.  You need to update it to"
			eerror "a newer version as syscall(<bignum>) will break."
			eerror "http://bugs.gentoo.org/279260"
			die "keeping your system alive, say thank you"
		fi
	fi

	# users have had a chance to phase themselves, time to give em the boot
	if [[ -e ${EROOT}/etc/locale.gen ]] && [[ -e ${EROOT}/etc/locales.build ]] ; then
		eerror "You still haven't deleted ${EROOT}/etc/locales.build."
		eerror "Do so now after making sure ${EROOT}/etc/locale.gen is kosher."
		die "lazy upgrader detected"
	fi

	if [[ ${CTARGET} == i386-* ]] ; then
		eerror "i386 CHOSTs are no longer supported."
		eerror "Chances are you don't actually want/need i386."
		eerror "Please read http://www.gentoo.org/doc/en/change-chost.xml"
		die "please fix your CHOST"
	fi

	if [[ -e /proc/xen ]] && [[ $(tc-arch) == "x86" ]] && ! is-flag -mno-tls-direct-seg-refs ; then
		ewarn "You are using Xen but don't have -mno-tls-direct-seg-refs in your CFLAGS."
		ewarn "This will result in a 50% performance penalty when running with a 32bit"
		ewarn "hypervisor, which is probably not what you want."
	fi

	# Make sure host system is up to date #394453
	if has_version '<sys-libs/glibc-2.13' && \
	   [[ -n $(scanelf -qys__guard -F'#s%F' "${EROOT}"/lib*/l*-*.so) ]]
	then
		ebegin "Scanning system for __guard to see if you need to rebuild first ..."
		local files=$(
			scanelf -qys__guard -F'#s%F' \
				"${EROOT}"/*bin/ \
				"${EROOT}"/lib* \
				"${EROOT}"/usr/*bin/ \
				"${EROOT}"/usr/lib* | \
				egrep -v \
					-e "^${EROOT}/lib.*/(libc|ld)-2.*.so$" \
					-e "^${EROOT}/sbin/(ldconfig|sln)$"
		)
		[[ -z ${files} ]]
		if ! eend $? ; then
			eerror "Your system still has old SSP __guard symbols.  You need to"
			eerror "rebuild all the packages that provide these files first:"
			eerror "${files}"
			die "old __guard detected"
		fi
	fi
}

toolchain-glibc_pkg_setup() {
	[[ ${EAPI:-0} == [0123] ]] && toolchain-glibc_pkg_pretend
}

# The following Kernel version handling functions are mostly copied from portage
# source. It's better not to use linux-info.eclass here since a) it adds too
# much magic, see bug 326693 for some of the arguments, and b) some of the
# functions are just not provided.

tc_glibc_get_KV() {
	uname -r
	return $?
}

tc_glibc_KV_major() {
	[[ -z $1 ]] && return 1
	local KV=$@
	echo "${KV%%.*}"
}

tc_glibc_KV_minor() {
	[[ -z $1 ]] && return 1
	local KV=$@
	KV=${KV#*.}
	echo "${KV%%.*}"
}

tc_glibc_KV_micro() {
	[[ -z $1 ]] && return 1
	local KV=$@
	KV=${KV#*.*.}
	echo "${KV%%[^[:digit:]]*}"
}

tc_glibc_KV_to_int() {
	[[ -z $1 ]] && return 1
	local KV_MAJOR=$(tc_glibc_KV_major "$1")
	local KV_MINOR=$(tc_glibc_KV_minor "$1")
	local KV_MICRO=$(tc_glibc_KV_micro "$1")
	local KV_int=$(( KV_MAJOR * 65536 + KV_MINOR * 256 + KV_MICRO ))

	# We make version 2.2.0 the minimum version we will handle as
	# a sanity check ... if its less, we fail ...
	if [[ ${KV_int} -ge 131584 ]] ; then
		echo "${KV_int}"
		return 0
	fi
	return 1
}

tc_glibc_int_to_KV() {
	local version=$1 major minor micro
	major=$((version / 65536))
	minor=$(((version % 65536) / 256))
	micro=$((version % 256))
	echo ${major}.${minor}.${micro}
}

eend_KV() {
	[[ $(tc_glibc_KV_to_int $1) -ge $(tc_glibc_KV_to_int $2) ]]
	eend $?
}

get_kheader_version() {
	printf '#include <linux/version.h>\nLINUX_VERSION_CODE\n' | \
	$(tc-getCPP ${CTARGET}) -I "$(alt_build_headers)" - | \
	tail -n 1
}

check_nptl_support() {
	# don't care about the compiler here as we aren't using it
	just_headers && return

	local run_kv build_kv want_kv
	run_kv=$(tc_glibc_get_KV)
	build_kv=$(tc_glibc_int_to_KV $(get_kheader_version))
	want_kv=${NPTL_KERN_VER}

	ebegin "Checking gcc for __thread support"
	if ! eend $(want__thread ; echo $?) ; then
		echo
		eerror "Could not find a gcc that supports the __thread directive!"
		eerror "Please update your binutils/gcc and try again."
		die "No __thread support in gcc!"
	fi

	if ! is_crosscompile && ! tc-is-cross-compiler ; then
		# Building fails on an non-supporting kernel
		ebegin "Checking kernel version (${run_kv} >= ${want_kv})"
		if ! eend_KV ${run_kv} ${want_kv} ; then
			echo
			eerror "You need a kernel of at least ${want_kv} for NPTL support!"
			die "Kernel version too low!"
		fi
	fi

	ebegin "Checking linux-headers version (${build_kv} >= ${want_kv})"
	if ! eend_KV ${build_kv} ${want_kv} ; then
		echo
		eerror "You need linux-headers of at least ${want_kv} for NPTL support!"
		die "linux-headers version too low!"
	fi
}

unpack_pkg() {
	local a=${PN}
	[[ -n ${SNAP_VER} ]] && a="${a}-${RELEASE_VER}"
	[[ -n $1 ]] && a="${a}-$1"
	if [[ -n ${SNAP_VER} ]] ; then
		a="${a}-${SNAP_VER}"
	else
		if [[ -n $2 ]] ; then
			a="${a}-$2"
		else
			a="${a}-${RELEASE_VER}"
		fi
	fi
	if has ${a}.tar.xz ${A} ; then
		unpacker ${a}.tar.xz
	else
		unpack ${a}.tar.bz2
	fi
	[[ -n $1 ]] && { mv ${a} $1 || die ; }
}

toolchain-glibc_do_src_unpack() {
	# Check NPTL support _before_ we unpack things to save some time
	want_nptl && check_nptl_support

	unpack_pkg

	cd "${S}"
	touch locale/C-translit.h #185476 #218003
	[[ -n ${LT_VER}     ]] && unpack_pkg linuxthreads ${LT_VER}
	[[ -n ${PORTS_VER}  ]] && unpack_pkg ports ${PORTS_VER}
	[[ -n ${LIBIDN_VER} ]] && unpack_pkg libidn

	if [[ -n ${PATCH_VER} ]] ; then
		cd "${WORKDIR}"
		unpack glibc-${RELEASE_VER}-patches-${PATCH_VER}.tar.bz2
		# pull out all the addons
		local d
		for d in extra/*/configure ; do
			d=${d%/configure}
			[[ -d ${S}/${d} ]] && die "${d} already exists in \${S}"
			mv "${d}" "${S}" || die "moving ${d} failed"
		done
	fi
}

toolchain-glibc_src_unpack() {
	setup_env

	toolchain-glibc_do_src_unpack
	[[ ${EAPI:-0} == [01] ]] && cd "${S}" && toolchain-glibc_src_prepare
}

toolchain-glibc_src_prepare() {
	# tag, glibc is it
	if ! version_is_at_least 2.17 ; then
		[[ -e csu/Banner ]] && die "need new banner location"
		glibc_banner > csu/Banner
	fi
	if [[ -n ${PATCH_VER} ]] && ! use vanilla ; then
		EPATCH_MULTI_MSG="Applying Gentoo Glibc Patchset ${RELEASE_VER}-${PATCH_VER} ..." \
		EPATCH_EXCLUDE=${GLIBC_PATCH_EXCLUDE} \
		EPATCH_SUFFIX="patch" \
		ARCH=$(tc-arch) \
		epatch "${WORKDIR}"/patches
	fi

	if just_headers ; then
		if [[ -e ports/sysdeps/mips/preconfigure ]] ; then
			# mips peeps like to screw with us.  if building headers,
			# we don't have a real compiler, so we can't let them
			# insert -mabi on us.
			sed -i '/CPPFLAGS=.*-mabi/s|.*|:|' ports/sysdeps/mips/preconfigure || die
			find ports/sysdeps/mips/ -name Makefile -exec sed -i '/^CC.*-mabi=/s:-mabi=.*:-D_MIPS_SZPTR=32:' {} +
		fi
	fi

	epatch_user

	gnuconfig_update

	# Glibc is stupid sometimes, and doesn't realize that with a
	# static C-Only gcc, -lgcc_eh doesn't exist.
	# https://sourceware.org/ml/libc-alpha/2003-09/msg00100.html
	# https://sourceware.org/ml/libc-alpha/2005-02/msg00042.html
	# But! Finally fixed in recent versions:
	# https://sourceware.org/ml/libc-alpha/2012-05/msg01865.html
	if ! version_is_at_least 2.16 ; then
		echo 'int main(){}' > "${T}"/gcc_eh_test.c
		if ! $(tc-getCC ${CTARGET}) ${CFLAGS} ${LDFLAGS} "${T}"/gcc_eh_test.c -lgcc_eh 2>/dev/null ; then
			sed -i -e 's:-lgcc_eh::' Makeconfig || die "sed gcc_eh"
		fi
	fi

	cd "${WORKDIR}"
	find . -type f '(' -size 0 -o -name "*.orig" ')' -delete
	find . -name configure -exec touch {} +

	eprefixify extra/locale/locale-gen

	# Fix permissions on some of the scripts.
	chmod u+x "${S}"/scripts/*.sh
}
dump_toolchain_settings() {
	echo

	einfo "$*"

	local v
	for v in ABI CBUILD CHOST CTARGET CBUILD_OPT CTARGET_OPT CC LD {AS,C,CPP,CXX,LD}FLAGS ; do
		einfo " $(printf '%15s' ${v}:)   ${!v}"
	done

	# The glibc configure script doesn't properly use LDFLAGS all the time.
	export CC="$(tc-getCC ${CTARGET}) ${LDFLAGS}"
	einfo " $(printf '%15s' 'Manual CC:')   ${CC}"
	echo
}

glibc_do_configure() {
	# Glibc does not work with gold (for various reasons) #269274.
	tc-ld-disable-gold

	dump_toolchain_settings "Configuring glibc for $1"

	local myconf=()

	# set addons
	pushd "${S}" > /dev/null
	local addons=$(echo */configure | sed \
		-e 's:/configure::g' \
		-e 's:\(linuxthreads\|nptl\|rtkaio\|glibc-compat\)\( \|$\)::g' \
		-e 's: \+$::' \
		-e 's! !,!g' \
		-e 's!^!,!' \
		-e '/^,\*$/d')
	[[ -d ports ]] && addons+=",ports"
	popd > /dev/null

	if has_version '<sys-libs/glibc-2.13' ; then
		myconf+=( --enable-old-ssp-compat )
	fi

	if version_is_at_least 2.25 ; then
		case ${CTARGET} in
			m68k*)
				# setjmp() is not compatible with stack protection:
				# https://sourceware.org/PR24202
				myconf+=( --enable-stack-protector=no )
				;;
			mips*)
				# dlopen() detects stack smash on mips n32 ABI.
				# Cause is unknown: https://bugs.gentoo.org/640130
				myconf+=( --enable-stack-protector=no )
				;;
			powerpc-*)
				# Currently gcc on powerpc32 generates invalid code for
				# __builtin_return_address(0) calls. Normally programs
				# don't do that but malloc hooks in glibc do:
				# https://gcc.gnu.org/PR81996
				# https://bugs.gentoo.org/629054
				myconf+=( --enable-stack-protector=no )
				;;
			*)
				myconf+=( --enable-stack-protector=all )
				;;
		esac
	fi

	# Keep a whitelist of targets supporing IFUNC. glibc's ./configure
	# is not robust enough to detect proper support:
	#    https://bugs.gentoo.org/641216
	#    https://sourceware.org/PR22634#c0
	case $(tc-arch ${CTARGET}) in
		# Keep whitelist of targets where autodetection mostly works.
		amd64|x86|sparc|ppc|ppc64|arm|arm64|s390) ;;
		# Blacklist everywhere else
		*) myconf+=( libc_cv_ld_gnu_indirect_function=no ) ;;
	esac

	if version_is_at_least 2.25 ; then
		myconf+=( --enable-stackguard-randomization )
	else
		myconf+=( $(use_enable hardened stackguard-randomization) )
	fi

	[[ $(tc-is-softfloat) == "yes" ]] && myconf+=( --without-fp )

	if [[ $1 == "linuxthreads" ]] ; then
		if want_tls ; then
			myconf+=( --with-tls )

			if ! want__thread || use glibc-compat20 || [[ ${LT_KER_VER} == 2.[02].* ]] ; then
				myconf+=( --without-__thread )
			else
				myconf+=( --with-__thread )
			fi
		else
			myconf+=( --without-tls --without-__thread )
		fi

		myconf+=( --disable-sanity-checks )
		addons="linuxthreads${addons}"
		myconf+=( --enable-kernel=${LT_KER_VER} )
	elif [[ $1 == "nptl" ]] ; then
		# Newer versions require nptl, so there is no addon for it.
		version_is_at_least 2.20 || addons="nptl${addons}"
		myconf+=( --enable-kernel=${NPTL_KERN_VER} )
	else
		die "invalid pthread option"
	fi
	myconf+=( --enable-add-ons="${addons#,}" )

	# Since SELinux support is only required for nscd, only enable it if:
	# 1. USE selinux
	# 2. only for the primary ABI on multilib systems
	# 3. Not a crosscompile
	if ! is_crosscompile && use selinux ; then
		if use multilib ; then
			if is_final_abi ; then
				myconf+=( --with-selinux )
			else
				myconf+=( --without-selinux )
			fi
		else
			myconf+=( --with-selinux )
		fi
	else
		myconf+=( --without-selinux )
	fi

	# Force a few tests where we always know the answer but
	# configure is incapable of finding it.
	if is_crosscompile ; then
		export \
			libc_cv_c_cleanup=yes \
			libc_cv_forced_unwind=yes
	fi

	myconf+=(
		--without-cvs
		--disable-werror
		--enable-bind-now
		--build=${CBUILD_OPT:-${CBUILD}}
		--host=${CTARGET_OPT:-${CTARGET}}
		$(use_enable profile)
		$(use_with gd)
		--with-headers=$(alt_build_headers)
		--prefix="${EPREFIX}/usr"
		--sysconfdir="${EPREFIX}/etc"
		--localstatedir="${EPREFIX}/var"
		--libdir='$(prefix)'/$(get_libdir)
		--mandir='$(prefix)'/share/man
		--infodir='$(prefix)'/share/info
		--libexecdir='$(libdir)'/misc/glibc
		--with-bugurl=http://bugs.gentoo.org/
		--with-pkgversion="$(glibc_banner)"
		$(use_multiarch || echo --disable-multi-arch)
		$(in_iuse rpc && use_enable rpc obsolete-rpc || echo --enable-obsolete-rpc)
		$(in_iuse systemtap && use_enable systemtap)
		$(in_iuse nscd && use_enable nscd)
		${EXTRA_ECONF}
	)

	# We rely on sys-libs/timezone-data for timezone tools normally.
	if version_is_at_least 2.23 ; then
		myconf+=( $(use_enable vanilla timezone-tools) )
	fi

	# These libs don't have configure flags.
	ac_cv_lib_audit_audit_log_user_avc_message=$(in_iuse audit && usex audit || echo no)
	ac_cv_lib_cap_cap_init=$(in_iuse caps && usex caps || echo no)

	# There is no configure option for this and we need to export it
	# since the glibc build will re-run configure on itself
	export libc_cv_rootsbindir="${EPREFIX}/sbin"
	export libc_cv_slibdir="${EPREFIX}/$(get_libdir)"

	# We take care of patching our binutils to use both hash styles,
	# and many people like to force gnu hash style only, so disable
	# this overriding check.  #347761
	export libc_cv_hashstyle=no

	# Overtime, generating info pages can be painful.  So disable this for
	# versions older than the latest stable to avoid the issue (this ver
	# should be updated from time to time).  #464394 #465816
	if ! version_is_at_least 2.17 ; then
		export ac_cv_prog_MAKEINFO=:
	fi

	local builddir=$(builddir "$1")
	mkdir -p "${builddir}"
	cd "${builddir}"
	set -- "${S}"/configure "${myconf[@]}"
	echo "$@"
	"$@" || die "failed to configure glibc"

	# ia64 static cross-compilers are a pita in so much that they
	# can't produce static ELFs (as the libgcc.a is broken).  so
	# disable building of the programs for those targets if it
	# doesn't work.
	# XXX: We could turn this into a compiler test, but ia64 is
	# the only one that matters, so this should be fine for now.
	if is_crosscompile && [[ ${CTARGET} == ia64* ]] ; then
		sed -i '1i+link-static = touch $@' config.make
	fi

	# If we're trying to migrate between ABI sets, we need
	# to lie and use a local copy of gcc.  Like if the system
	# is built with MULTILIB_ABIS="amd64 x86" but we want to
	# add x32 to it, gcc/glibc don't yet support x32.
	if [[ -n ${GCC_BOOTSTRAP_VER} ]] && use multilib ; then
		echo 'main(){}' > "${T}"/test.c
		if ! $(tc-getCC ${CTARGET}) ${CFLAGS} ${LDFLAGS} "${T}"/test.c -Wl,-emain -lgcc 2>/dev/null ; then
			sed -i -e '/^CC = /s:$: -B$(objdir)/../'"gcc-${GCC_BOOTSTRAP_VER}/${ABI}:" config.make || die
			mkdir -p sunrpc
			cp $(which rpcgen) sunrpc/cross-rpcgen || die
			touch -t 202001010101 sunrpc/cross-rpcgen || die
		fi
	fi
}

toolchain-glibc_headers_configure() {
	export ABI=default

	local builddir=$(builddir "headers")
	mkdir -p "${builddir}"
	cd "${builddir}"

	# if we don't have a compiler yet, we can't really test it now ...
	# hopefully they don't affect header generation, so let's hope for
	# the best here ...
	local v vars=(
		ac_cv_header_cpuid_h=yes
		libc_cv_{386,390,alpha,arm,hppa,ia64,mips,{powerpc,sparc}{,32,64},sh,x86_64}_tls=yes
		libc_cv_asm_cfi_directives=yes
		libc_cv_broken_visibility_attribute=no
		libc_cv_c_cleanup=yes
		libc_cv_forced_unwind=yes
		libc_cv_gcc___thread=yes
		libc_cv_mlong_double_128=yes
		libc_cv_mlong_double_128ibm=yes
		libc_cv_ppc_machine=yes
		libc_cv_ppc_rel16=yes
		libc_cv_predef_fortify_source=no
		libc_cv_visibility_attribute=yes
		libc_cv_z_combreloc=yes
		libc_cv_z_execstack=yes
		libc_cv_z_initfirst=yes
		libc_cv_z_nodelete=yes
		libc_cv_z_nodlopen=yes
		libc_cv_z_relro=yes
		libc_mips_abi=${ABI}
		libc_mips_float=$([[ $(tc-is-softfloat) == "yes" ]] && echo soft || echo hard)
		# These libs don't have configure flags.
		ac_cv_lib_audit_audit_log_user_avc_message=no
		ac_cv_lib_cap_cap_init=no
	)
	if ! version_is_at_least 2.25 ; then
		vars+=(
			libc_cv_predef_stack_protector=no
		)
	fi
	einfo "Forcing cached settings:"
	for v in "${vars[@]}" ; do
		einfo " ${v}"
		export ${v}
	done

	# Blow away some random CC settings that screw things up. #550192
	if [[ -d ${S}/sysdeps/mips ]]; then
		pushd "${S}"/sysdeps/mips >/dev/null
		sed -i -e '/^CC +=/s:=.*:= -D_MIPS_SZPTR=32:' mips32/Makefile mips64/n32/Makefile || die
		sed -i -e '/^CC +=/s:=.*:= -D_MIPS_SZPTR=64:' mips64/n64/Makefile || die
		if version_is_at_least 2.21 ; then
			# Force the mips ABI to the default.  This is OK because the set of
			# installed headers in this phase is the same between the 3 ABIs.
			# If this ever changes, this hack will break, but that's unlikely
			# as glibc discourages that behavior.
			# https://crbug.com/647033
			sed -i -e 's:abiflag=.*:abiflag=_ABIO32:' preconfigure || die
		fi
		popd >/dev/null
	fi

	local myconf=()
	myconf+=(
		--disable-sanity-checks
		--enable-hacker-mode
		--without-cvs
		--disable-werror
		--enable-bind-now
		--build=${CBUILD_OPT:-${CBUILD}}
		--host=${CTARGET_OPT:-${CTARGET}}
		--with-headers=$(alt_build_headers)
		--prefix="${EPREFIX}/usr"
		${EXTRA_ECONF}
	)

	local addons
	[[ -d ${S}/ports ]] && addons+=",ports"
	# Newer versions require nptl, so there is no addon for it.
	version_is_at_least 2.20 || addons+=",nptl"
	myconf+=( --enable-add-ons="${addons#,}" )

	# Nothing is compiled here which would affect the headers for the target.
	# So forcing CC/CFLAGS is sane.
	set -- "${S}"/configure "${myconf[@]}"
	echo "$@"
	CC="$(tc-getBUILD_CC)" \
	CFLAGS="-O1 -pipe" \
	CPPFLAGS="-U_FORTIFY_SOURCE" \
	LDFLAGS="" \
	"$@" || die "failed to configure glibc"
}

toolchain-glibc_do_src_configure() {
	if just_headers ; then
		toolchain-glibc_headers_configure
	else
		want_linuxthreads && glibc_do_configure linuxthreads
		want_nptl && glibc_do_configure nptl
	fi
}

toolchain-glibc_src_configure() {
	foreach_abi toolchain-glibc_do_src_configure
}

toolchain-glibc_do_src_compile() {
	local t
	for t in linuxthreads nptl ; do
		if want_${t} ; then
			[[ ${EAPI:-0} == [01] ]] && glibc_do_configure ${t}
			emake -C "$(builddir ${t})" || die "make ${t} for ${ABI} failed"
		fi
	done
}

toolchain-glibc_src_compile() {
	if just_headers ; then
		[[ ${EAPI:-0} == [01] ]] && toolchain-glibc_headers_configure
		return
	fi

	foreach_abi toolchain-glibc_do_src_compile
}

glibc_src_test() {
	cd "$(builddir $1)"
	nonfatal emake -j1 check && return 0
	einfo "make check failed - re-running with --keep-going to get the rest of the results"
	nonfatal emake -j1 -k check
	ewarn "make check failed for ${ABI}-${CTARGET}-$1"
	return 1
}

toolchain-glibc_do_src_test() {
	local ret=0 t
	for t in linuxthreads nptl ; do
		if want_${t} ; then
			glibc_src_test ${t}
			: $(( ret |= $? ))
		fi
	done
	return ${ret}
}

toolchain-glibc_src_test() {
	# Give tests more time to complete.
	export TIMEOUTFACTOR=5

	foreach_abi toolchain-glibc_do_src_test || die "tests failed"
}

toolchain-glibc_do_src_install() {
	local builddir=$(builddir $(want_linuxthreads && echo linuxthreads || echo nptl))
	cd "${builddir}"

	emake install_root="${D}$(alt_prefix)" install || die

	if want_linuxthreads && want_nptl ; then
		einfo "Installing NPTL to $(alt_libdir)/tls/..."
		cd "$(builddir nptl)"
		dodir $(alt_libdir)/tls $(alt_usrlibdir)/nptl

		local l src_lib
		for l in libc libm librt libpthread libthread_db ; do
			# take care of shared lib first ...
			l=${l}.so
			if [[ -e ${l} ]] ; then
				src_lib=${l}
			else
				src_lib=$(eval echo */${l})
			fi
			cp -a ${src_lib} "${ED}"$(alt_libdir)/tls/${l} || die "copying nptl ${l}"
			fperms a+rx $(alt_libdir)/tls/${l}
			dosym ${l} $(alt_libdir)/tls/$(scanelf -qSF'%S#F' ${src_lib})

			# then grab the linker script or the symlink ...
			if [[ -L ${ED}$(alt_usrlibdir)/${l} ]] ; then
				dosym $(alt_libdir)/tls/${l} $(alt_usrlibdir)/nptl/${l}
			else
				sed \
					-e "s:/${l}:/tls/${l}:g" \
					-e "s:/${l/%.so/_nonshared.a}:/nptl/${l/%.so/_nonshared.a}:g" \
					"${ED}"$(alt_usrlibdir)/${l} > "${ED}"$(alt_usrlibdir)/nptl/${l}
			fi

			# then grab the static lib ...
			src_lib=${src_lib/%.so/.a}
			[[ ! -e ${src_lib} ]] && src_lib=${src_lib/%.a/_pic.a}
			cp -a ${src_lib} "${ED}"$(alt_usrlibdir)/nptl/ || die "copying nptl ${src_lib}"
			src_lib=${src_lib/%.a/_nonshared.a}
			if [[ -e ${src_lib} ]] ; then
				cp -a ${src_lib} "${ED}"$(alt_usrlibdir)/nptl/ || die "copying nptl ${src_lib}"
			fi
		done

		# use the nptl linker instead of the linuxthreads one as the linuxthreads
		# one may lack TLS support and that can be really bad for business
		cp -a elf/ld.so "${ED}"$(alt_libdir)/$(scanelf -qSF'%S#F' elf/ld.so) || die "copying nptl interp"
	fi

	# Normally real_pv is ${PV}. Live ebuilds are exception, there we need
	# to infer upstream version:
	# '#define VERSION "2.26.90"' -> '2.26.90'
	local upstream_pv=$(sed -n -r 's/#define VERSION "(.*)"/\1/p' "${S}"/version.h)
	# Newer versions get fancy with libm linkage to include vectorized support.
	# While we don't really need a ldscript here, portage QA checks get upset.
	if [[ -e ${ED}$(alt_usrlibdir)/libm-${upstream_pv}.a ]] ; then
		dosym ../../$(get_libdir)/libm-${upstream_pv}.so $(alt_usrlibdir)/libm-${upstream_pv}.so
	fi

	# We'll take care of the cache ourselves
	rm -f "${ED}"/etc/ld.so.cache

	# Everything past this point just needs to be done once ...
	is_final_abi || return 0

	# Make sure the non-native interp can be found on multilib systems even
	# if the main library set isn't installed into the right place.  Maybe
	# we should query the active gcc for info instead of hardcoding it ?
	local i ldso_abi ldso_name
	local ldso_abi_list=(
		# x86
		amd64   /lib64/ld-linux-x86-64.so.2
		x32     /libx32/ld-linux-x32.so.2
		x86     /lib/ld-linux.so.2
		# mips
		o32     /lib/ld.so.1
		n32     /lib32/ld.so.1
		n64     /lib64/ld.so.1
		# powerpc
		ppc     /lib/ld.so.1
		# s390
		s390    /lib/ld.so.1
		s390x   /lib/ld64.so.1
		# sparc
		sparc32 /lib/ld-linux.so.2
		sparc64 /lib64/ld-linux.so.2
	)
	case $(tc-endian) in
	little)
		ldso_abi_list+=(
			# arm
			arm64   /lib/ld-linux-aarch64.so.1
			# ELFv2 (glibc does not support ELFv1 on LE)
			ppc64   /lib64/ld64.so.2
		)
		;;
	big)
		ldso_abi_list+=(
			# arm
			arm64   /lib/ld-linux-aarch64_be.so.1
			# ELFv1 (glibc does not support ELFv2 on BE)
			ppc64   /lib64/ld64.so.1
		)
		;;
	esac
	if [[ ${SYMLINK_LIB} == "yes" ]] && [[ ! -e ${ED}/$(alt_prefix)/lib ]] ; then
		dosym $(get_abi_LIBDIR ${DEFAULT_ABI}) $(alt_prefix)/lib
	fi
	for (( i = 0; i < ${#ldso_abi_list[@]}; i += 2 )) ; do
		ldso_abi=${ldso_abi_list[i]}
		has ${ldso_abi} $(get_install_abis) || continue

		ldso_name="$(alt_prefix)${ldso_abi_list[i+1]}"
		if [[ ! -L ${ED}/${ldso_name} && ! -e ${ED}/${ldso_name} ]] ; then
			dosym ../$(get_abi_LIBDIR ${ldso_abi})/${ldso_name##*/} ${ldso_name}
		fi
	done

	# With devpts under Linux mounted properly, we do not need the pt_chown
	# binary to be setuid.  This is because the default owners/perms will be
	# exactly what we want.
	if in_iuse suid && ! use suid ; then
		find "${ED}" -name pt_chown -exec chmod -s {} +
	fi

	#################################################################
	# EVERYTHING AFTER THIS POINT IS FOR NATIVE GLIBC INSTALLS ONLY #
	# Make sure we install some symlink hacks so that when we build
	# a 2nd stage cross-compiler, gcc finds the target system
	# headers correctly.  See gcc/doc/gccinstall.info
	if is_crosscompile ; then
		# We need to make sure that /lib and /usr/lib always exists.
		# gcc likes to use relative paths to get to its multilibs like
		# /usr/lib/../lib64/.  So while we don't install any files into
		# /usr/lib/, we do need it to exist.
		cd "${ED}"$(alt_libdir)/..
		[[ -e lib ]] || mkdir lib
		cd "${ED}"$(alt_usrlibdir)/..
		[[ -e lib ]] || mkdir lib

		dosym usr/include $(alt_prefix)/sys-include
		return 0
	fi

	# Files for Debian-style locale updating
	dodir /usr/share/i18n
	sed \
		-e "/^#/d" \
		-e "/SUPPORTED-LOCALES=/d" \
		-e "s: \\\\::g" -e "s:/: :g" \
		"${S}"/localedata/SUPPORTED > "${ED}"/usr/share/i18n/SUPPORTED \
		|| die "generating /usr/share/i18n/SUPPORTED failed"
	cd "${WORKDIR}"/extra/locale
	dosbin locale-gen || die
	doman *.[0-8]
	insinto /etc
	doins locale.gen || die

	# Make sure all the ABI's can find the locales and so we only
	# have to generate one set
	local a
	keepdir /usr/$(get_libdir)/locale
	for a in $(get_install_abis) ; do
		if [[ ! -e ${ED}/usr/$(get_abi_LIBDIR ${a})/locale ]] ; then
			dosym /usr/$(get_libdir)/locale /usr/$(get_abi_LIBDIR ${a})/locale
		fi
	done

	cd "${S}"

	# Install misc network config files
	insinto /etc
	doins nscd/nscd.conf posix/gai.conf nss/nsswitch.conf || die
	doins "${WORKDIR}"/extra/etc/*.conf || die

	if ! in_iuse nscd || use nscd ; then
		doinitd "$(prefixify_ro "${WORKDIR}"/extra/etc/nscd)" || die

		local nscd_args=(
			-e "s:@PIDFILE@:$(strings "${ED}"/usr/sbin/nscd | grep nscd.pid):"
		)
		version_is_at_least 2.16 || nscd_args+=( -e 's: --foreground : :' )
		sed -i "${nscd_args[@]}" "${ED}"/etc/init.d/nscd

		# Newer versions of glibc include the nscd.service themselves.
		# TODO: Drop the $FILESDIR copy once 2.19 goes stable.
		if version_is_at_least 2.19 ; then
			systemd_dounit nscd/nscd.service || die
			newtmpfiles nscd/nscd.tmpfiles nscd.conf || die
		else
			systemd_dounit "${FILESDIR}"/nscd.service || die
			newtmpfiles "${FILESDIR}"/nscd.tmpfilesd nscd.conf || die
		fi
	else
		# Do this since extra/etc/*.conf above might have nscd.conf.
		rm -f "${ED}"/etc/nscd.conf
	fi

	echo 'LDPATH="include ld.so.conf.d/*.conf"' > "${T}"/00glibc
	doenvd "${T}"/00glibc || die

	for d in BUGS ChangeLog* CONFORMANCE FAQ NEWS NOTES PROJECTS README* ; do
		[[ -s ${d} ]] && dodoc ${d}
	done

	# Prevent overwriting of the /etc/localtime symlink.  We'll handle the
	# creation of the "factory" symlink in pkg_postinst().
	rm -f "${ED}"/etc/localtime
}

toolchain-glibc_headers_install() {
	local builddir=$(builddir "headers")
	cd "${builddir}"
	emake install_root="${D}$(alt_prefix)" install-headers || die
	if ! version_is_at_least 2.16 ; then
		insinto $(alt_headers)/bits
		doins bits/stdio_lim.h || die
	fi
	insinto $(alt_headers)/gnu
	doins "${S}"/include/gnu/stubs.h || die "doins include gnu"
	# Make sure we install the sys-include symlink so that when
	# we build a 2nd stage cross-compiler, gcc finds the target
	# system headers correctly.  See gcc/doc/gccinstall.info
	dosym usr/include $(alt_prefix)/sys-include
}

toolchain-glibc_src_install() {
	if just_headers ; then
		export ABI=default
		toolchain-glibc_headers_install
		return
	fi

	foreach_abi toolchain-glibc_do_src_install
}

# Simple test to make sure our new glibc isn't completely broken.
# Make sure we don't test with statically built binaries since
# they will fail.  Also, skip if this glibc is a cross compiler.
#
# If coreutils is built with USE=multicall, some of these files
# will just be wrapper scripts, not actual ELFs we can test.
glibc_sanity_check() {
	cd / #228809

	# We enter ${ED} so to avoid trouble if the path contains
	# special characters; for instance if the path contains the
	# colon character (:), then the linker will try to split it
	# and look for the libraries in an unexpected place. This can
	# lead to unsafe code execution if the generated prefix is
	# within a world-writable directory.
	# (e.g. /var/tmp/portage:${HOSTNAME})
	pushd "${ED}"/$(get_libdir) >/dev/null

	local x striptest
	for x in cal date env free ls true uname uptime ; do
		x=$(type -p ${x})
		[[ -z ${x} || ${x} != ${EPREFIX}/* ]] && continue
		striptest=$(LC_ALL="C" file -L ${x} 2>/dev/null) || continue
		case ${striptest} in
		*"statically linked"*) continue;;
		*"ASCII text"*) continue;;
		esac
		# We need to clear the locale settings as the upgrade might want
		# incompatible locale data.  This test is not for verifying that.
		LC_ALL=C \
		./ld-*.so --library-path . ${x} > /dev/null \
			|| die "simple run test (${x}) failed"
	done

	popd >/dev/null
}

toolchain-glibc_pkg_preinst() {
	# nothing to do if just installing headers
	just_headers && return

	# prepare /etc/ld.so.conf.d/ for files
	mkdir -p "${EROOT}"/etc/ld.so.conf.d

	# Default /etc/hosts.conf:multi to on for systems with small dbs.
	if [[ $(wc -l < "${EROOT}"/etc/hosts) -lt 1000 ]] ; then
		sed -i '/^multi off/s:off:on:' "${ED}"/etc/host.conf
		elog "Defaulting /etc/host.conf:multi to on"
	fi

	[[ ${ROOT} != "/" ]] && return 0
	[[ -d ${ED}/$(get_libdir) ]] || return 0
	[[ -z ${BOOTSTRAP_RAP} ]] && glibc_sanity_check

	# For newer EAPIs, this was run in pkg_pretend.
	if [[ ${EAPI:-0} == [0123] ]] ; then
		check_devpts
	fi
}

toolchain-glibc_pkg_postinst() {
	# nothing to do if just installing headers
	just_headers && return

	if ! tc-is-cross-compiler && [[ -x ${EROOT}/usr/sbin/iconvconfig ]] ; then
		# Generate fastloading iconv module configuration file.
		"${EROOT}"/usr/sbin/iconvconfig --prefix="${ROOT}"
	fi

	if ! is_crosscompile && [[ ${ROOT} == "/" ]] ; then
		# Reload init ... if in a chroot or a diff init package, ignore
		# errors from this step #253697
		/sbin/telinit U 2>/dev/null

		# if the host locales.gen contains no entries, we'll install everything
		local locale_list="${EROOT}etc/locale.gen"
		if [[ -z $(locale-gen --list --config "${locale_list}") ]] ; then
			ewarn "Generating all locales; edit /etc/locale.gen to save time/space"
			locale_list="${EROOT}usr/share/i18n/SUPPORTED"
		fi
		locale-gen -j $(makeopts_jobs) --config "${locale_list}"
	fi
}

_TOOLCHAIN_GLIBC_ECLASS=1
fi