Merge branch 'master' into feature/iolintfeature/iolint

17 files changed, 936 insertions, 555 deletions

diff --git a/build-aux/ChangeLog b/build-aux/ChangeLog
index 8f07b4c6..eaaa6515 100644
--- a/build-aux/ChangeLog
+++ b/build-aux/ChangeLog
@@ -1,3 +1,7 @@
+2020-09-24         Arnold D. Robbins     <arnold@skeeve.com>
+
+	* config.guess: Updated from GNULIB.
+
 2020-09-11         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* config.sub: Updated from GNULIB.
diff --git a/build-aux/config.guess b/build-aux/config.guess
index 9aff91cf..8d70ec2b 100755
--- a/build-aux/config.guess
+++ b/build-aux/config.guess
@@ -2,7 +2,7 @@
 # Attempt to guess a canonical system name.
 #   Copyright 1992-2020 Free Software Foundation, Inc.
 
-timestamp='2020-08-17'
+timestamp='2020-09-19'
 
 # This file is free software; you can redistribute it and/or modify it
 # under the terms of the GNU General Public License as published by
@@ -150,17 +150,15 @@ Linux|GNU|GNU/*)
 	#elif defined(__dietlibc__)
 	LIBC=dietlibc
 	#else
+	#include <stdarg.h>
+	#ifdef __DEFINED_va_list
+	LIBC=musl
+	#else
 	LIBC=gnu
 	#endif
+	#endif
 	EOF
 	eval "`$CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep '^LIBC' | sed 's, ,,g'`"
-
-	# If ldd exists, use it to detect musl libc.
-	if command -v ldd >/dev/null && \
-		ldd --version 2>&1 | grep -q ^musl
-	then
-	    LIBC=musl
-	fi
 	;;
 esac
 
diff --git a/doc/ChangeLog b/doc/ChangeLog
index 4f485386..bb6aa39e 100644
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -1,3 +1,12 @@
+2020-09-24         Arnold D. Robbins     <arnold@skeeve.com>
+
+	* gawktexi.in: Fix a spelling error.
+	* wordlist, wordlist2, wordlist3: Remove words that spell
+	now recognizes as real words.
+	* gawkinet.texi: Fix a spelling error.
+	* Makefile.am (spellinet): New target.
+	* wordlist4: New file.
+
 2020-09-18         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* gawktexi.in: Minor fixes. Thanks to Antonio Columbo for
diff --git a/doc/Makefile.am b/doc/Makefile.am
index 24dd0405..d95d5660 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -110,7 +110,7 @@ awkcard.nc: $(CARDFILES)
 awkcard.pdf: awkcard.ps
 	ps2pdf awkcard.ps awkcard.pdf
 
-spell: spellmanual spellworkflow spellmanpage
+spell: spellmanual spellworkflow spellmanpage spellinet
 
 spellmanual:
 	@echo ==== gawktexi.in ====;
@@ -126,3 +126,8 @@ spellmanpage:
 	@echo ==== gawk.1 ====
 	export LC_ALL=C ; spell "$(srcdir)"/gawk.1 | \
 	sort -u | comm -23 - "$(srcdir)"/wordlist3
+
+spellinet:
+	@echo ==== gawkinet.texi ====
+	export LC_ALL=C ; spell "$(srcdir)"/gawkinet.texi | \
+	sort -u | comm -23 - "$(srcdir)"/wordlist4
diff --git a/doc/Makefile.in b/doc/Makefile.in
index c457ea1a..5d33b8a5 100644
--- a/doc/Makefile.in
+++ b/doc/Makefile.in
@@ -933,7 +933,7 @@ awkcard.nc: $(CARDFILES)
 awkcard.pdf: awkcard.ps
 	ps2pdf awkcard.ps awkcard.pdf
 
-spell: spellmanual spellworkflow spellmanpage
+spell: spellmanual spellworkflow spellmanpage spellinet
 
 spellmanual:
 	@echo ==== gawktexi.in ====;
@@ -950,6 +950,11 @@ spellmanpage:
 	export LC_ALL=C ; spell "$(srcdir)"/gawk.1 | \
 	sort -u | comm -23 - "$(srcdir)"/wordlist3
 
+spellinet:
+	@echo ==== gawkinet.texi ====
+	export LC_ALL=C ; spell "$(srcdir)"/gawkinet.texi | \
+	sort -u | comm -23 - "$(srcdir)"/wordlist4
+
 # Tell versions [3.59,3.63) of GNU make to not export all variables.
 # Otherwise a system limit (for SysV at least) may be exceeded.
 .NOEXPORT:
diff --git a/doc/gawk.info b/doc/gawk.info
index 88c01fae..a3c9a803 100644
--- a/doc/gawk.info
+++ b/doc/gawk.info
@@ -17892,8 +17892,8 @@ BREs.  You use '-E' to specify the use of EREs, and '-F' to specify
 searching for fixed strings.
 
    In practice, systems continue to come with separate 'egrep' and
-'fgrep' utilities, for backwards compatibilty.  This minor node provides
-an 'awk' implementation of 'egrep', which supports all of the
+'fgrep' utilities, for backwards compatibility.  This minor node
+provides an 'awk' implementation of 'egrep', which supports all of the
 POSIX-mandated options.  You invoke it as follows:
 
      'egrep' [OPTIONS] ''PATTERN'' FILES ...
@@ -37956,272 +37956,272 @@ Node: Running Examples726294
 Node: Clones727022
 Node: Cut Program728246
 Node: Egrep Program738175
-Node: Id Program747185
-Node: Split Program757132
-Ref: Split Program-Footnote-1760590
-Node: Tee Program760719
-Node: Uniq Program763509
-Node: Wc Program771073
-Ref: Wc Program-Footnote-1775328
-Node: Miscellaneous Programs775422
-Node: Dupword Program776635
-Node: Alarm Program778665
-Node: Translate Program783520
-Ref: Translate Program-Footnote-1788085
-Node: Labels Program788355
-Ref: Labels Program-Footnote-1791706
-Node: Word Sorting791790
-Node: History Sorting795862
-Node: Extract Program798087
-Node: Simple Sed806141
-Node: Igawk Program809215
-Ref: Igawk Program-Footnote-1823546
-Ref: Igawk Program-Footnote-2823748
-Ref: Igawk Program-Footnote-3823870
-Node: Anagram Program823985
-Node: Signature Program827047
-Node: Programs Summary828294
-Node: Programs Exercises829508
-Ref: Programs Exercises-Footnote-1833638
-Node: Advanced Features833724
-Node: Nondecimal Data835714
-Node: Array Sorting837305
-Node: Controlling Array Traversal838005
-Ref: Controlling Array Traversal-Footnote-1846373
-Node: Array Sorting Functions846491
-Ref: Array Sorting Functions-Footnote-1851582
-Node: Two-way I/O851778
-Ref: Two-way I/O-Footnote-1859499
-Ref: Two-way I/O-Footnote-2859686
-Node: TCP/IP Networking859768
-Node: Profiling862886
-Node: Advanced Features Summary872200
-Node: Internationalization874044
-Node: I18N and L10N875524
-Node: Explaining gettext876211
-Ref: Explaining gettext-Footnote-1882103
-Ref: Explaining gettext-Footnote-2882288
-Node: Programmer i18n882453
-Ref: Programmer i18n-Footnote-1887402
-Node: Translator i18n887451
-Node: String Extraction888245
-Ref: String Extraction-Footnote-1889377
-Node: Printf Ordering889463
-Ref: Printf Ordering-Footnote-1892249
-Node: I18N Portability892313
-Ref: I18N Portability-Footnote-1894769
-Node: I18N Example894832
-Ref: I18N Example-Footnote-1898107
-Ref: I18N Example-Footnote-2898180
-Node: Gawk I18N898289
-Node: I18N Summary898938
-Node: Debugger900279
-Node: Debugging901279
-Node: Debugging Concepts901720
-Node: Debugging Terms903529
-Node: Awk Debugging906104
-Ref: Awk Debugging-Footnote-1907049
-Node: Sample Debugging Session907181
-Node: Debugger Invocation907715
-Node: Finding The Bug909101
-Node: List of Debugger Commands915575
-Node: Breakpoint Control916908
-Node: Debugger Execution Control920602
-Node: Viewing And Changing Data923964
-Node: Execution Stack927505
-Node: Debugger Info929142
-Node: Miscellaneous Debugger Commands933213
-Node: Readline Support938275
-Node: Limitations939171
-Node: Debugging Summary941725
-Node: Namespaces943004
-Node: Global Namespace944115
-Node: Qualified Names945513
-Node: Default Namespace946512
-Node: Changing The Namespace947253
-Node: Naming Rules948867
-Node: Internal Name Management950715
-Node: Namespace Example951757
-Node: Namespace And Features954319
-Node: Namespace Summary955754
-Node: Arbitrary Precision Arithmetic957231
-Node: Computer Arithmetic958718
-Ref: table-numeric-ranges962484
-Ref: table-floating-point-ranges962977
-Ref: Computer Arithmetic-Footnote-1963635
-Node: Math Definitions963692
-Ref: table-ieee-formats967008
-Ref: Math Definitions-Footnote-1967611
-Node: MPFR features967716
-Node: FP Math Caution969434
-Ref: FP Math Caution-Footnote-1970506
-Node: Inexactness of computations970875
-Node: Inexact representation971835
-Node: Comparing FP Values973195
-Node: Errors accumulate974436
-Node: Getting Accuracy975869
-Node: Try To Round978579
-Node: Setting precision979478
-Ref: table-predefined-precision-strings980175
-Node: Setting the rounding mode982005
-Ref: table-gawk-rounding-modes982379
-Ref: Setting the rounding mode-Footnote-1986310
-Node: Arbitrary Precision Integers986489
-Ref: Arbitrary Precision Integers-Footnote-1989664
-Node: Checking for MPFR989813
-Node: POSIX Floating Point Problems991287
-Ref: POSIX Floating Point Problems-Footnote-1995572
-Node: Floating point summary995610
-Node: Dynamic Extensions997800
-Node: Extension Intro999353
-Node: Plugin License1000619
-Node: Extension Mechanism Outline1001416
-Ref: figure-load-extension1001855
-Ref: figure-register-new-function1003420
-Ref: figure-call-new-function1004512
-Node: Extension API Description1006574
-Node: Extension API Functions Introduction1008287
-Ref: table-api-std-headers1010123
-Node: General Data Types1014372
-Ref: General Data Types-Footnote-11023002
-Node: Memory Allocation Functions1023301
-Ref: Memory Allocation Functions-Footnote-11027802
-Node: Constructor Functions1027901
-Node: API Ownership of MPFR and GMP Values1031367
-Node: Registration Functions1032680
-Node: Extension Functions1033380
-Node: Exit Callback Functions1038702
-Node: Extension Version String1039952
-Node: Input Parsers1040615
-Node: Output Wrappers1053336
-Node: Two-way processors1057848
-Node: Printing Messages1060113
-Ref: Printing Messages-Footnote-11061284
-Node: Updating ERRNO1061437
-Node: Requesting Values1062176
-Ref: table-value-types-returned1062913
-Node: Accessing Parameters1063849
-Node: Symbol Table Access1065086
-Node: Symbol table by name1065598
-Ref: Symbol table by name-Footnote-11068622
-Node: Symbol table by cookie1068750
-Ref: Symbol table by cookie-Footnote-11072935
-Node: Cached values1072999
-Ref: Cached values-Footnote-11076535
-Node: Array Manipulation1076688
-Ref: Array Manipulation-Footnote-11077779
-Node: Array Data Types1077816
-Ref: Array Data Types-Footnote-11080474
-Node: Array Functions1080566
-Node: Flattening Arrays1085064
-Node: Creating Arrays1092040
-Node: Redirection API1096807
-Node: Extension API Variables1099640
-Node: Extension Versioning1100351
-Ref: gawk-api-version1100780
-Node: Extension GMP/MPFR Versioning1102511
-Node: Extension API Informational Variables1104139
-Node: Extension API Boilerplate1105212
-Node: Changes from API V11109186
-Node: Finding Extensions1110758
-Node: Extension Example1111317
-Node: Internal File Description1112115
-Node: Internal File Ops1116195
-Ref: Internal File Ops-Footnote-11127545
-Node: Using Internal File Ops1127685
-Ref: Using Internal File Ops-Footnote-11130068
-Node: Extension Samples1130342
-Node: Extension Sample File Functions1131871
-Node: Extension Sample Fnmatch1139520
-Node: Extension Sample Fork1141007
-Node: Extension Sample Inplace1142225
-Node: Extension Sample Ord1145850
-Node: Extension Sample Readdir1146686
-Ref: table-readdir-file-types1147575
-Node: Extension Sample Revout1148642
-Node: Extension Sample Rev2way1149231
-Node: Extension Sample Read write array1149971
-Node: Extension Sample Readfile1151913
-Node: Extension Sample Time1153008
-Node: Extension Sample API Tests1154760
-Node: gawkextlib1155252
-Node: Extension summary1158170
-Node: Extension Exercises1161872
-Node: Language History1163114
-Node: V7/SVR3.11164770
-Node: SVR41166922
-Node: POSIX1168356
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-Node: POSIX/GNU1170466
-Node: Feature History1176244
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-Node: Contributors1198947
-Node: History summary1204944
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-Node: Extracting1208715
-Node: Distribution contents1210353
-Node: Unix Installation1216833
-Node: Quick Installation1217515
-Node: Shell Startup Files1219929
-Node: Additional Configuration Options1221018
-Node: Configuration Philosophy1223333
-Node: Non-Unix Installation1225702
-Node: PC Installation1226162
-Node: PC Binary Installation1227000
-Node: PC Compiling1227435
-Node: PC Using1228552
-Node: Cygwin1232105
-Node: MSYS1233329
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-Node: VMS Dynamic Extensions1236009
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-Node: VMS Running1239947
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-Node: Bug address1246095
-Node: Usenet1249077
-Node: Maintainers1250081
-Node: Other Versions1251266
-Node: Installation summary1258354
-Node: Notes1259563
-Node: Compatibility Mode1260357
-Node: Additions1261139
-Node: Accessing The Source1262064
-Node: Adding Code1263501
-Node: New Ports1269720
-Node: Derived Files1274095
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-Node: Future Extensions1280502
-Node: Implementation Limitations1281160
-Node: Extension Design1282370
-Node: Old Extension Problems1283514
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-Node: Extension New Mechanism Goals1285089
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-Node: Extension Other Design Decisions1288642
-Node: Extension Future Growth1290755
-Node: Notes summary1291361
-Node: Basic Concepts1292519
-Node: Basic High Level1293200
-Ref: figure-general-flow1293482
-Ref: figure-process-flow1294167
-Ref: Basic High Level-Footnote-11297468
-Node: Basic Data Typing1297653
-Node: Glossary1300981
-Node: Copying1332866
-Node: GNU Free Documentation License1370409
-Node: Index1395529
+Node: Id Program747186
+Node: Split Program757133
+Ref: Split Program-Footnote-1760591
+Node: Tee Program760720
+Node: Uniq Program763510
+Node: Wc Program771074
+Ref: Wc Program-Footnote-1775329
+Node: Miscellaneous Programs775423
+Node: Dupword Program776636
+Node: Alarm Program778666
+Node: Translate Program783521
+Ref: Translate Program-Footnote-1788086
+Node: Labels Program788356
+Ref: Labels Program-Footnote-1791707
+Node: Word Sorting791791
+Node: History Sorting795863
+Node: Extract Program798088
+Node: Simple Sed806142
+Node: Igawk Program809216
+Ref: Igawk Program-Footnote-1823547
+Ref: Igawk Program-Footnote-2823749
+Ref: Igawk Program-Footnote-3823871
+Node: Anagram Program823986
+Node: Signature Program827048
+Node: Programs Summary828295
+Node: Programs Exercises829509
+Ref: Programs Exercises-Footnote-1833639
+Node: Advanced Features833725
+Node: Nondecimal Data835715
+Node: Array Sorting837306
+Node: Controlling Array Traversal838006
+Ref: Controlling Array Traversal-Footnote-1846374
+Node: Array Sorting Functions846492
+Ref: Array Sorting Functions-Footnote-1851583
+Node: Two-way I/O851779
+Ref: Two-way I/O-Footnote-1859500
+Ref: Two-way I/O-Footnote-2859687
+Node: TCP/IP Networking859769
+Node: Profiling862887
+Node: Advanced Features Summary872201
+Node: Internationalization874045
+Node: I18N and L10N875525
+Node: Explaining gettext876212
+Ref: Explaining gettext-Footnote-1882104
+Ref: Explaining gettext-Footnote-2882289
+Node: Programmer i18n882454
+Ref: Programmer i18n-Footnote-1887403
+Node: Translator i18n887452
+Node: String Extraction888246
+Ref: String Extraction-Footnote-1889378
+Node: Printf Ordering889464
+Ref: Printf Ordering-Footnote-1892250
+Node: I18N Portability892314
+Ref: I18N Portability-Footnote-1894770
+Node: I18N Example894833
+Ref: I18N Example-Footnote-1898108
+Ref: I18N Example-Footnote-2898181
+Node: Gawk I18N898290
+Node: I18N Summary898939
+Node: Debugger900280
+Node: Debugging901280
+Node: Debugging Concepts901721
+Node: Debugging Terms903530
+Node: Awk Debugging906105
+Ref: Awk Debugging-Footnote-1907050
+Node: Sample Debugging Session907182
+Node: Debugger Invocation907716
+Node: Finding The Bug909102
+Node: List of Debugger Commands915576
+Node: Breakpoint Control916909
+Node: Debugger Execution Control920603
+Node: Viewing And Changing Data923965
+Node: Execution Stack927506
+Node: Debugger Info929143
+Node: Miscellaneous Debugger Commands933214
+Node: Readline Support938276
+Node: Limitations939172
+Node: Debugging Summary941726
+Node: Namespaces943005
+Node: Global Namespace944116
+Node: Qualified Names945514
+Node: Default Namespace946513
+Node: Changing The Namespace947254
+Node: Naming Rules948868
+Node: Internal Name Management950716
+Node: Namespace Example951758
+Node: Namespace And Features954320
+Node: Namespace Summary955755
+Node: Arbitrary Precision Arithmetic957232
+Node: Computer Arithmetic958719
+Ref: table-numeric-ranges962485
+Ref: table-floating-point-ranges962978
+Ref: Computer Arithmetic-Footnote-1963636
+Node: Math Definitions963693
+Ref: table-ieee-formats967009
+Ref: Math Definitions-Footnote-1967612
+Node: MPFR features967717
+Node: FP Math Caution969435
+Ref: FP Math Caution-Footnote-1970507
+Node: Inexactness of computations970876
+Node: Inexact representation971836
+Node: Comparing FP Values973196
+Node: Errors accumulate974437
+Node: Getting Accuracy975870
+Node: Try To Round978580
+Node: Setting precision979479
+Ref: table-predefined-precision-strings980176
+Node: Setting the rounding mode982006
+Ref: table-gawk-rounding-modes982380
+Ref: Setting the rounding mode-Footnote-1986311
+Node: Arbitrary Precision Integers986490
+Ref: Arbitrary Precision Integers-Footnote-1989665
+Node: Checking for MPFR989814
+Node: POSIX Floating Point Problems991288
+Ref: POSIX Floating Point Problems-Footnote-1995573
+Node: Floating point summary995611
+Node: Dynamic Extensions997801
+Node: Extension Intro999354
+Node: Plugin License1000620
+Node: Extension Mechanism Outline1001417
+Ref: figure-load-extension1001856
+Ref: figure-register-new-function1003421
+Ref: figure-call-new-function1004513
+Node: Extension API Description1006575
+Node: Extension API Functions Introduction1008288
+Ref: table-api-std-headers1010124
+Node: General Data Types1014373
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+Node: Memory Allocation Functions1023302
+Ref: Memory Allocation Functions-Footnote-11027803
+Node: Constructor Functions1027902
+Node: API Ownership of MPFR and GMP Values1031368
+Node: Registration Functions1032681
+Node: Extension Functions1033381
+Node: Exit Callback Functions1038703
+Node: Extension Version String1039953
+Node: Input Parsers1040616
+Node: Output Wrappers1053337
+Node: Two-way processors1057849
+Node: Printing Messages1060114
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+Node: Updating ERRNO1061438
+Node: Requesting Values1062177
+Ref: table-value-types-returned1062914
+Node: Accessing Parameters1063850
+Node: Symbol Table Access1065087
+Node: Symbol table by name1065599
+Ref: Symbol table by name-Footnote-11068623
+Node: Symbol table by cookie1068751
+Ref: Symbol table by cookie-Footnote-11072936
+Node: Cached values1073000
+Ref: Cached values-Footnote-11076536
+Node: Array Manipulation1076689
+Ref: Array Manipulation-Footnote-11077780
+Node: Array Data Types1077817
+Ref: Array Data Types-Footnote-11080475
+Node: Array Functions1080567
+Node: Flattening Arrays1085065
+Node: Creating Arrays1092041
+Node: Redirection API1096808
+Node: Extension API Variables1099641
+Node: Extension Versioning1100352
+Ref: gawk-api-version1100781
+Node: Extension GMP/MPFR Versioning1102512
+Node: Extension API Informational Variables1104140
+Node: Extension API Boilerplate1105213
+Node: Changes from API V11109187
+Node: Finding Extensions1110759
+Node: Extension Example1111318
+Node: Internal File Description1112116
+Node: Internal File Ops1116196
+Ref: Internal File Ops-Footnote-11127546
+Node: Using Internal File Ops1127686
+Ref: Using Internal File Ops-Footnote-11130069
+Node: Extension Samples1130343
+Node: Extension Sample File Functions1131872
+Node: Extension Sample Fnmatch1139521
+Node: Extension Sample Fork1141008
+Node: Extension Sample Inplace1142226
+Node: Extension Sample Ord1145851
+Node: Extension Sample Readdir1146687
+Ref: table-readdir-file-types1147576
+Node: Extension Sample Revout1148643
+Node: Extension Sample Rev2way1149232
+Node: Extension Sample Read write array1149972
+Node: Extension Sample Readfile1151914
+Node: Extension Sample Time1153009
+Node: Extension Sample API Tests1154761
+Node: gawkextlib1155253
+Node: Extension summary1158171
+Node: Extension Exercises1161873
+Node: Language History1163115
+Node: V7/SVR3.11164771
+Node: SVR41166923
+Node: POSIX1168357
+Node: BTL1169738
+Node: POSIX/GNU1170467
+Node: Feature History1176245
+Node: Common Extensions1192564
+Node: Ranges and Locales1193847
+Ref: Ranges and Locales-Footnote-11198463
+Ref: Ranges and Locales-Footnote-21198490
+Ref: Ranges and Locales-Footnote-31198725
+Node: Contributors1198948
+Node: History summary1204945
+Node: Installation1206325
+Node: Gawk Distribution1207269
+Node: Getting1207753
+Node: Extracting1208716
+Node: Distribution contents1210354
+Node: Unix Installation1216834
+Node: Quick Installation1217516
+Node: Shell Startup Files1219930
+Node: Additional Configuration Options1221019
+Node: Configuration Philosophy1223334
+Node: Non-Unix Installation1225703
+Node: PC Installation1226163
+Node: PC Binary Installation1227001
+Node: PC Compiling1227436
+Node: PC Using1228553
+Node: Cygwin1232106
+Node: MSYS1233330
+Node: VMS Installation1233932
+Node: VMS Compilation1234723
+Ref: VMS Compilation-Footnote-11235952
+Node: VMS Dynamic Extensions1236010
+Node: VMS Installation Details1237695
+Node: VMS Running1239948
+Node: VMS GNV1244227
+Node: VMS Old Gawk1244962
+Node: Bugs1245433
+Node: Bug address1246096
+Node: Usenet1249078
+Node: Maintainers1250082
+Node: Other Versions1251267
+Node: Installation summary1258355
+Node: Notes1259564
+Node: Compatibility Mode1260358
+Node: Additions1261140
+Node: Accessing The Source1262065
+Node: Adding Code1263502
+Node: New Ports1269721
+Node: Derived Files1274096
+Ref: Derived Files-Footnote-11279756
+Ref: Derived Files-Footnote-21279791
+Ref: Derived Files-Footnote-31280389
+Node: Future Extensions1280503
+Node: Implementation Limitations1281161
+Node: Extension Design1282371
+Node: Old Extension Problems1283515
+Ref: Old Extension Problems-Footnote-11285033
+Node: Extension New Mechanism Goals1285090
+Ref: Extension New Mechanism Goals-Footnote-11288454
+Node: Extension Other Design Decisions1288643
+Node: Extension Future Growth1290756
+Node: Notes summary1291362
+Node: Basic Concepts1292520
+Node: Basic High Level1293201
+Ref: figure-general-flow1293483
+Ref: figure-process-flow1294168
+Ref: Basic High Level-Footnote-11297469
+Node: Basic Data Typing1297654
+Node: Glossary1300982
+Node: Copying1332867
+Node: GNU Free Documentation License1370410
+Node: Index1395530
 
 End Tag Table
 
diff --git a/doc/gawk.texi b/doc/gawk.texi
index fdeb01ed..90146b9f 100644
--- a/doc/gawk.texi
+++ b/doc/gawk.texi
@@ -25337,7 +25337,7 @@ is to search using BREs. You use @command{-E} to specify the use
 of EREs, and @option{-F} to specify searching for fixed strings.
 
 In practice, systems continue to come with separate @command{egrep}
-and @command{fgrep} utilities, for backwards compatibilty. This
+and @command{fgrep} utilities, for backwards compatibility. This
 @value{SECTION} provides an @command{awk} implementation of @command{egrep},
 which supports all of the POSIX-mandated options.
 You invoke it as follows:
diff --git a/doc/gawkinet.info b/doc/gawkinet.info
index 4de7cf0a..626048fa 100644
--- a/doc/gawkinet.info
+++ b/doc/gawkinet.info
@@ -2894,7 +2894,7 @@ variables.  The following conventions are used:
 
    Now it's clear what happens to the 'Label' parameter of the function
 'migrate()'.  It is copied into 'MOBVAR["Label"]' and travels alongside
-the other data.  Since travelling takes place via HTTP, records must be
+the other data.  Since traveling takes place via HTTP, records must be
 separated with '"\r\n"' in 'RS' and 'ORS' as usual.  The code assembly
 for migration takes place in three steps:
 
@@ -4394,12 +4394,12 @@ Node: STATIST104830
 Ref: STATIST-Footnote-1117982
 Node: MAZE118427
 Node: MOBAGWHO124634
-Ref: MOBAGWHO-Footnote-1138652
-Node: STOXPRED138707
-Node: PROTBASE152995
-Node: Links166111
-Node: GNU Free Documentation License169544
-Node: Index194664
+Ref: MOBAGWHO-Footnote-1138651
+Node: STOXPRED138706
+Node: PROTBASE152994
+Node: Links166110
+Node: GNU Free Documentation License169543
+Node: Index194663
 
 End Tag Table
 
diff --git a/doc/gawkinet.texi b/doc/gawkinet.texi
index 91c222be..2bb22d93 100644
--- a/doc/gawkinet.texi
+++ b/doc/gawkinet.texi
@@ -3507,7 +3507,7 @@ takes part in migration has to be an element of this array.
 
 Now it's clear what happens to the @code{Label} parameter of the
 function @code{migrate()}. It is copied into @code{MOBVAR["Label"]} and
-travels alongside the other data. Since travelling takes place via HTTP,
+travels alongside the other data. Since traveling takes place via HTTP,
 records must be separated with @code{"\r\n"} in @code{RS} and
 @code{ORS} as usual. The code assembly for migration takes place in
 three steps:
diff --git a/doc/gawktexi.in b/doc/gawktexi.in
index 1f639334..ae1d0bc4 100644
--- a/doc/gawktexi.in
+++ b/doc/gawktexi.in
@@ -24347,7 +24347,7 @@ is to search using BREs. You use @command{-E} to specify the use
 of EREs, and @option{-F} to specify searching for fixed strings.
 
 In practice, systems continue to come with separate @command{egrep}
-and @command{fgrep} utilities, for backwards compatibilty. This
+and @command{fgrep} utilities, for backwards compatibility. This
 @value{SECTION} provides an @command{awk} implementation of @command{egrep},
 which supports all of the POSIX-mandated options.
 You invoke it as follows:
diff --git a/doc/wordlist b/doc/wordlist
index 3b5f579f..d3aea0be 100644
--- a/doc/wordlist
+++ b/doc/wordlist
@@ -4,7 +4,6 @@ ABC
 ABCDEFGHIJKLMNOPQRSTUVWXYZ
 ABCXYabcdxyz
 ACLs
-ACM
 ADR
 AF
 ANDing
@@ -21,14 +20,11 @@ AWKBUFSIZE
 AWKLIBPATH
 AWKPATH
 AWKREADFUNC
-Acknowledgements
-Adams's
 AdditionalResources
 Affero
 Aharon
 Aho
 Akim
-Anders
 Andreas
 Argind
 Assaf
@@ -46,18 +42,15 @@ BEGINFILE
 BEL
 BINMODE
 BLKSIZE
+BREs
 BSIZE
 BTL
 BWK
 Banzai
 BeOS
-Bentley's
 Benzinger
-Bitwise
 Bleah
 Bornstein
-Bourne
-Breakpoint
 Brin's
 Brini
 Brini's
@@ -77,7 +70,6 @@ CEST
 CFLAGS
 CGI
 CHEM
-CMP
 COMFOLLOW
 COMMONEXT
 CONFIG
@@ -86,7 +78,6 @@ CRC
 CRTL
 CSV
 CTYPE
-Callback
 Cc
 Chana
 ChangeLog
@@ -98,7 +89,6 @@ Cloutier
 Cn
 Co
 Collado
-Constant's
 Coprocess
 Coprocesses
 Coreutils
@@ -115,7 +105,6 @@ DDF
 DEV
 DF
 DFA
-DGAWK
 DHAVE
 DIR
 DJGPP
@@ -123,11 +112,8 @@ DK
 DST
 DTD
 DVI
-Datafile
 Davide
 Davide's
-Decrement
-Decrementing
 Deifik
 Demaille
 Dinline
@@ -135,15 +121,10 @@ Drepper
 Duman
 Dupword
 EAGAIN
-EBCDIC
 EC
 EINTR
-EMISTERED
 EMRED
-EMX
 ENDFILE
-ENVIRON
-EOF
 EREs
 ERRNO
 ESC
@@ -151,15 +132,12 @@ EST
 ETIMEDOUT
 EWOULDBLOCK
 EY
-Eberhard
 Ec
 Ee
 Efraim
 Eggert
 Egrep
 Embeddable
-Emptor
-Executables
 Exp
 Expat
 Ey
@@ -168,9 +146,7 @@ FD
 FDL
 FF
 FFN
-FHS
 FIELDWIDTHS
-FILENAME
 FIXME
 FN
 FNM
@@ -180,21 +156,16 @@ FORmula
 FP
 FPAT
 FS
-FSF
-FSF's
 FTS
 FULLXREF
 FUNCTAB
 Fabi
 Fabius
 Fenlason
-Filename
 Filetrans
 Fnames
 Fnmatch
-Formatter
 Formfeed
-Fortran
 FreeBSD
 Friedl
 GAWKINETTITLE
@@ -205,7 +176,6 @@ GETGRENT
 GMP
 GMT
 GNITS
-GNU's
 GNV
 GPL
 GR
@@ -214,7 +184,7 @@ GetSystemTimeAsFileTime
 Getline
 Getlocaltime
 Getopt
-GitHub
+Ggnru
 Grigera
 Groucho
 GyeoNxTFby
@@ -231,11 +201,10 @@ Haque
 Hartholz
 Hasegawa
 Hermann
-Hitchhiker's
 Hoare's
 Hurd
-Hurray
 IA
+IDs
 IFBLK
 IFCHR
 IFDIR
@@ -256,7 +225,6 @@ ISCHR
 ISLNK
 Igawk
 Illumos
-Incrementing
 Inf
 Init
 Inited
@@ -274,7 +242,6 @@ JVM
 Jaegermann
 Jannick
 Jeroen
-Johansen
 Johansen's
 Jul
 Jun
@@ -283,19 +250,15 @@ Kahrs
 Kai
 Kasal
 Kenobi
-Kernighan
-Kernighan's
 Korn
 Krauze
 Kwityn
 Kwok
 LARGEFILE
 LC
-LDFLAGS
 LEQ
 LF
 LGPL
-LIBS
 LINENO
 LXIX
 Langston
@@ -307,8 +270,6 @@ Lvalue
 MALLOC
 MAXLINES
 MC
-MERCHANTABILITY
-MINGW
 MIPS
 MKS
 MMC
@@ -323,8 +284,6 @@ MSG
 MSYS
 MVX
 MW
-Makefile
-Makefiles
 Malka
 Malmberg
 MathWorld
@@ -358,7 +317,6 @@ NT
 NUMCUR
 NaN
 Nachum
-NeXT
 Neacsu
 Neacsu's
 NetBSD
@@ -373,13 +331,11 @@ Nonduplicated
 Noninteractive
 Nonoption
 Nov
-O'Reilly
 ODS
 OFMT
 OFS
 OI
 OM
-OMF
 ORG
 ORS
 OU
@@ -405,16 +361,12 @@ Ou
 Oy
 PASSWD
 PATCHLEVEL
-PATHNAME
 PCPU
 PCSI
 PDF
 PEBKAC
 PNG
 POS
-POSIX
-POSIXLY
-PP
 PQgetvalue
 PREC
 PROCINFO
@@ -423,36 +375,27 @@ PW
 PWD
 Panos
 Papadopoulos
-Parsers
 Passwd
 Peifer
 PiFormulas
 Plauger
-Plugin
 PostScript
 PostgreSQL
 Postprocessing
-PowerPC
 Pr
 Pre
 Preopened
-Preprocessor
 Prestandard
 Printf
-Prolog
 QSE
 QSINGLE
 QTawk
 Quanstrom
 Quicksort
 QuikTrim
-RANLIB
-README
 REGEX
-RELICENSING
 REVOUT
 RLENGTH
-RMS
 ROUNDMODE
 RRI
 RSTART
@@ -463,16 +406,12 @@ RapidJson
 Readdir
 Readfile
 Readline
-Redirections
-Redis
 Regex
 Regexp
 Regexps
-Reimplementing
 Retryable
 Revout
 RiscOS
-Ritchie
 Rivka
 Rvalue
 SA
@@ -483,7 +422,6 @@ SIGHUP
 SIGINT
 SIGQUIT
 SIGUSR
-SPARC
 SRC
 SS
 SSC
@@ -510,11 +448,8 @@ Significand
 Skywalker
 Smalltalk
 Smallville
-Solaris
-Stallman
 Std
 Stepan
-Stewartson's
 Strnum
 Strtonum
 Subarrays
@@ -522,7 +457,6 @@ Sublicensing
 SunOS
 SylvestersSequence
 TABs
-TCP
 TEXTDOMAIN
 TIDYMEM
 TM
@@ -531,45 +465,33 @@ TRANslator
 TZ
 Tcl
 Texinfo
-Timestamp
 Topher
 Toporek
 Trueman
 UC
-UDP
 UI
-UNIXROOT
+ULONG
 USR
 UTC
 UTF
-Ubuntu
 Ulrich
-Ultrix
-Unary
-Uncomment
 Uniq
 Uwe
 VER
-VMS
 VT
-Vax
 Versioning
 Vinschen
 WIPO
 Walamazoo
 Wallin
-Wasserman
 Watchpoint
 Wc
-Weinberger
 Weinberger's
 Weisstein
 Wfile
 Wfoo
 WhidbeyNet
-Whitespace
 Whoope
-Wikipedia
 Woehlke
 Wsource
 Wversion
@@ -588,14 +510,9 @@ Za
 Zaphod
 Zaretskii
 Zaretskii's
-Zcrtdll
 Zeichen
 Zeichenkette
-Zlinker
-Zmt
-Zomf
 Zoulas
-Zstack
 aB
 aCa
 aIt
@@ -621,7 +538,6 @@ abs
 abx
 ac
 acbfoo
-acknowledgements
 aclocal
 addrs
 adm
@@ -652,7 +568,6 @@ andrewsumner
 andspan
 andy
 anthony
-apache
 api
 appendixsec
 appendixsubsec
@@ -661,7 +576,6 @@ approx
 aqb
 aqc
 ar
-arctangent
 arg
 argc
 args
@@ -736,7 +650,6 @@ bigskip
 bindtextdomain
 binmode
 bisonfix
-bitwise
 blabber
 blabbers
 blabby
@@ -749,26 +662,21 @@ blockdev
 blockquote
 blocksize
 bool
-boolean
 boundar
 br
 brabble
 brabbles
 branchname
-breakpoint
 brennan
 brent
 brini
 broderick
 bt
-btl
 buening
 buf
 bufsize
 buildable
-builtin
 busybox
-bwk
 bwkawk
 bycount
 bygid
@@ -777,8 +685,6 @@ byuid
 bz
 bzip
 cAsE
-callback
-callbacks
 calloc
 caltech
 camelot
@@ -796,7 +702,6 @@ cd
 cde
 cdot
 ce
-centerline
 cgi
 cgit
 cgiwrap
@@ -812,6 +717,7 @@ chien
 chmod
 chown
 chr
+cilnqsvx
 cinaP
 cinap
 cindex
@@ -837,7 +743,6 @@ colname
 colsep
 colspec
 columnfractions
-colwidth
 com
 comcast
 commandline
@@ -860,16 +765,12 @@ copyrightable
 coreutils
 cos
 cosmogen
-counterintuitive
-cozx
 cp
 cplusplus
 cr
-cron
 csh
 cssun
 csv
-csvil
 ctime
 cul
 curdir
@@ -882,8 +783,6 @@ daabaaa
 daburashka
 danfuzz
 dartmouth
-datadir
-datafile
 datafiles
 datespec
 dave
@@ -895,36 +794,27 @@ dcngettext
 dd
 ddd
 de
-deallocations
 debuggee
-debugger's
 decommented
-decrement
-decrementing
 def
 del
 delarray
 delim
-delorie
 denorm
 depcomp
 desc
 descrip
 deserialize
-designator
 dest
-destructors
 detailmenu
 dev
 devbsize
-dfa
 dfn
 dgawk
 dict
 diff
 diffs
 digts
-dimensioned
 dir
 dircategory
 direntry
@@ -932,7 +822,6 @@ distributable
 div
 djgpp
 dl
-dlload
 dlopen
 dlsym
 dn
@@ -941,12 +830,10 @@ dom
 dont
 dorking
 doug
-dpitts
 dportein
 dps
 dresdnerbank
 drwxr
-dtect
 dumparray
 duncan
 dup
@@ -960,7 +847,6 @@ eg
 egid
 egrep
 eklye
-el
 elem
 elif
 eliz
@@ -969,10 +855,7 @@ emalloc
 embeddable
 emory
 emph
-emptor
-emxomfar
 en
-encodings
 enddots
 endfile
 endgrent
@@ -983,7 +866,6 @@ endpwent
 enrichening
 enum
 env
-environ
 eof
 eql
 equiv
@@ -999,16 +881,11 @@ euid
 eval
 evenheading
 exe
-execl
-executables
-exepack
 exitval
 exp
 expat
 expr
 ext
-extenders
-extern
 ezalloc
 ezwinports
 fPIC
@@ -1024,6 +901,7 @@ ferror
 fffffffffff
 fffffffffffd
 fflush
+fgrep
 fi
 fieldlist
 fieldpat
@@ -1033,13 +911,8 @@ fifo
 filedata
 filefuncs
 filelist
-filename
-filenames
 fileno
 fileref
-filesystem
-filesystem's
-filesystems
 filetype
 filll
 finalout
@@ -1049,6 +922,7 @@ finx
 firstname
 flac
 flist
+fmod
 fmode
 fn
 fname
@@ -1062,8 +936,6 @@ foobar
 foooo
 foooobazbarrrrr
 fopen
-formatter
-formatters
 formfeed
 fp
 fpat
@@ -1139,14 +1011,15 @@ gnv
 goawk
 golang
 goldberg
-goodie
-goto
 gr
 grcat
+grent
 grep
 groff
 groupawk
+groupnames
 groupsbyuser
+groupset
 grp
 gst
 gsub
@@ -1156,8 +1029,6 @@ gvim
 gz
 gzip
 halign
-hankedr
-hardcoded
 hboxes
 headitem
 helpfull
@@ -1168,8 +1039,6 @@ hhhh
 hhob
 histsort
 hlp
-hobbes
-hodge
 hotmail
 hpmuseum
 hrule
@@ -1209,20 +1078,16 @@ igawk
 iggy
 ileaf
 illumos
+ilnqsvx
 imagedata
 imageobject
-implementers
-implementors
 inbuf
-incrementing
 ind
 indirectcall
 indx
 inelegancies
 inet
-inexactitude
 inf
-infodir
 inforef
 informaltable
 infusarum
@@ -1230,8 +1095,6 @@ ing
 ington
 init
 inited
-initializations
-inline
 inlinefmt
 inlineraw
 inmargin
@@ -1244,7 +1107,6 @@ int
 intdiv
 interline
 internl
-interprocess
 io
 iobuf
 isarray
@@ -1274,7 +1136,6 @@ juan
 julie
 karl
 katie
-kb
 kbd
 kilgrona
 kmem
@@ -1292,15 +1153,13 @@ le
 lefthand
 len
 leq
-lex
+lexico
 lf
 lflashlight
-lgcc
 lgpl
 lhs
 li
 libexec
-libexecdir
 libintl
 libmawk
 libtool
@@ -1313,7 +1172,6 @@ linkend
 linksize
 linkval
 lintwarn
-linux
 listsize
 literallayout
 localhost
@@ -1336,21 +1194,15 @@ lvalues
 lwall
 lwc
 madronabluff
-maintainer's
 makeinfo
 malloc
 malloced
-mandir
-matcher
-matchers
 matchit
 mathcs
 mathworld
 mawk
 maxelt
 maxsub
-mbfw
-mbprintf
 mediaobject
 mem
 memcpy
@@ -1366,7 +1218,6 @@ mingw
 miriam
 misc
 mit
-mk
 mkdir
 mkinstalldirs
 mktime
@@ -1412,8 +1263,6 @@ nInfo
 nLINE
 nOUCH
 nameend
-namespace
-namespaces
 namest
 nan
 nanosleep
@@ -1424,7 +1273,6 @@ nboxes
 nbsp
 nc
 ncustomers
-nd
 ndash
 ndevicesim
 ndirs
@@ -1450,7 +1298,6 @@ nlink
 nls
 nmatches
 nmemb
-nmsu
 nnn
 noalign
 noassign
@@ -1470,7 +1317,6 @@ nonintegral
 noninteractive
 noninteractively
 nonmatching
-nonnegative
 nonnumeric
 nonobvious
 nonoption
@@ -1484,9 +1330,7 @@ nonrectangular
 nonrepeated
 nonspecial
 nonwhitespace
-noone
 nr
-nroff
 ns
 nul
 num
@@ -1515,7 +1359,6 @@ onetrueawk
 onlinepubs
 oo
 op
-opcodes
 openbsd
 openfortress
 opengroup
@@ -1546,15 +1389,10 @@ pactechdata
 panos
 para
 param
-parameterized
 parsedebug
-parser's
-parsers
 passwd
 passwdawk
 pathlist
-pathname
-pathnames
 pathto
 patsplit
 pawk
@@ -1581,41 +1419,26 @@ pid
 pival
 pkgdatadir
 pkgextensiondir
-plugin
 pm
 pmode
 png
 po
-podge
-portably
 posix
-postfix
 postincrement
 pp
 ppid
-pr
 pre
 prec
-precedences
-precisions
 prefaceinfo
 preformatted
 preopened
-prepend
-prepended
-prepending
-prepends
 prepinfo
-preprocessor
 prev
-princeton
 printf
 printindex
 printpage
-priori
 proc
 processarray
-profiler
 prog
 progfile
 pseudorandom
@@ -1631,6 +1454,7 @@ putchar
 pw
 pwcat
 pwd
+pwent
 pxref
 qb
 qc
@@ -1643,7 +1467,6 @@ quicksort
 quiktrim
 quux
 rab
-radians
 raincloud
 raison
 ramey
@@ -1659,36 +1482,28 @@ readfile
 readline
 realloc
 recomputation
-reddit
 redir
-redirections
 reenable
-regcomp
 regex
-regexec
 regexp
 regexps
-reimplementing
 relationals
-relicensing
 reparsed
 repl
 repo
-representable
 resplit
 ret
 retargetable
-retitle
 retval
 revoutput
 revtwoway
 rfc
 rflashlight
+rguid
 righthand
 rm
 rms
 ro
-roundTiesToAway
 roundTiesToEven
 roundTowardNegative
 roundTowardPositive
@@ -1700,8 +1515,7 @@ rshift
 rsort
 rt
 ru
-runnable
-runtime
+ruid
 rvalues
 rw
 rwarray
@@ -1711,14 +1525,12 @@ samp
 samuel
 sar
 savannah
-sbcglobal
 sbin
 sbuf
 sc
 scanf
 scl
 scm
-scottd
 sdot
 searchlist
 sed
@@ -1733,25 +1545,20 @@ setlinebuf
 settitle
 sf
 sfx
-shar
 shellquote
 shortdayname
-shorthands
 shortmonth
 shorttitlepage
 showargs
 shu
 si
-signedness
 significand
-sim
 sizeof
 skeeve
 skynet
 slrn
 smallbook
 smallexample
-smallskip
 smtp
 snmp
 snobol
@@ -1764,12 +1571,10 @@ sourceforge
 sp
 spanname
 spanspec
-spawnl
 sprintf
 sprintlink
 sq
 sqQ
-sqrt
 srand
 src
 ssize
@@ -1802,26 +1607,15 @@ strtonum
 struct
 subarray
 subarrays
-subdirectories
-subdirectory
 subentry
-subexpression
-subexpressions
 sublicense
 sublicenses
-subscripting
 substr
-substring
-substrings
 subsubsection
-subunit
 sudo
 summarycontents
-superset
-svil
 sylogin
 sym
-symlink
 syncodeindex
 synindex
 sys
@@ -1854,19 +1648,16 @@ testpasswd
 tew
 tex
 texi
-texindex
 texinfo
 textdomain
 tgroup
-th
 thead
 thes
 thischapter
 thisopt
 thispage
 thrudvang
-timestamp
-timestamps
+tid
 timex
 titlepage
 tlines
@@ -1876,14 +1667,10 @@ tmy
 tolower
 toupper
 tr
-traceback
 tracy
 transfile
-troff
 trunc
-tst
 ttotal
-tty
 ttyD
 ttyV
 ttyp
@@ -1892,11 +1679,11 @@ ttyv
 tvpeople
 twords
 txt
-typedef
 typeof
 tyw
 ucb
 udc
+udcf
 udp
 uid
 ulink
@@ -1904,13 +1691,10 @@ umask
 umb
 umich
 un
-unary
-uncommented
 undef
 undevicesimus
 undisplay
 unduplicated
-unformatted
 unhandled
 unicode
 uniq
@@ -1922,18 +1706,12 @@ unparenthesized
 unredirected
 unsetting
 unspecialize
-untyped
 unwatch
-unwritable
 uref
 urefurlonlylinktrue
 urgen
 url
 urlcolor
-usebracesinindexestrue
-usenet
-username
-usernames
 usleep
 usr
 ut
@@ -1951,10 +1729,8 @@ variadic
 vbox
 vc
 vec
-versa
 versioned
 vglue
-vio
 vms
 vmsbuild
 vr
@@ -1965,7 +1741,6 @@ walkarray
 washington
 wass
 watchpoint
-watchpoints
 wb
 wc
 wcscoll
@@ -1978,12 +1753,8 @@ whhhhy
 whhhy
 whhy
 whidbey
-whitespace
 whizprog
-wiki
 wikipedia
-wildcard
-wildcards
 wlv
 wnewmail
 wordfreq
@@ -1998,7 +1769,6 @@ xFOO
 xX
 xaa
 xab
-xalloc
 xbd
 xdeadBEEF
 xdigit
@@ -2028,7 +1798,6 @@ xyzzy
 xz
 ya
 yabber
-yacc
 yballs
 yearday
 ylwrap
diff --git a/doc/wordlist2 b/doc/wordlist2
index fc192113..b576c483 100644
--- a/doc/wordlist2
+++ b/doc/wordlist2
@@ -7,30 +7,22 @@ CFLAGS
 ChangeLog
 Ctrl
 FIXME
-FSF
-FSF's
 GCC
 Gettext
-GitHub
 ISBN
 Kahrs
 Libtool
-Makefile
 PCC
 PDF
 Rebase
 Rebasing
 Repo
-SVN
 TODO
 Ta
 Texinfo
-Uncomment
 UsingGit
-Workflow
 Yehezkel
 ac
-apache
 api
 arnold
 arnoldrobbins
@@ -41,7 +33,6 @@ automake
 autotools
 awk
 awkgram
-builtin
 cd
 cindex
 com
@@ -109,7 +100,6 @@ literallayout
 llvm
 ltu
 ludd
-maintainer's
 makeinfo
 mpfr
 multiplestates
@@ -150,6 +140,7 @@ srv
 ssh
 stderr
 stdout
+subentry
 summarycontents
 sv
 syncodeindex
@@ -165,6 +156,7 @@ tinycc
 titlepage
 tmp
 toto
+ubuntu
 ui
 ulink
 unnumberedsec
@@ -179,7 +171,6 @@ vms
 vr
 vskip
 wordpress
-workflow
 worthwile
 www
 xref
diff --git a/doc/wordlist3 b/doc/wordlist3
index 8b2ad03d..49aa0712 100644
--- a/doc/wordlist3
+++ b/doc/wordlist3
@@ -52,7 +52,6 @@ ORS
 OpenVMS
 PREC
 PROCINFO
-PX
 RLENGTH
 ROUNDMODE
 RSTART
@@ -68,7 +67,6 @@ TEXTDOMAIN
 TP
 Trueman
 UTC
-Weinberger
 YYYY
 Za
 aB
@@ -88,7 +86,6 @@ awkprof
 awkvars
 bignum
 bindtextdomain
-builtin
 ch
 cmd
 cmp
@@ -98,7 +95,6 @@ compl
 coprocess
 coprocesses
 cos
-cygwin
 datespec
 dcgettext
 dcngettext
@@ -169,7 +165,6 @@ logdir
 lport
 lq
 lshift
-macosx
 metacharacter
 metacharacters
 min
@@ -187,6 +182,7 @@ nmap
 nonsignificant
 nonwhitespace
 num
+op
 org
 os
 parsedebug
diff --git a/doc/wordlist4 b/doc/wordlist4
new file mode 100644
index 00000000..f267327a
--- /dev/null
+++ b/doc/wordlist4
@@ -0,0 +1,597 @@
+AA
+ADR
+ALINK
+API
+ARGC
+ARGV
+AWK
+AXP
+AboutELIZA
+AboutServer
+AvoidCount
+Awk
+Ayalon
+BGCOLOR
+BLASTService
+BR
+Boutell
+CC
+CELLPADDING
+CEST
+CGI
+CNN
+CSV
+CTD
+CatPipe
+ChangeConfig
+CheckConfig
+CleanUp
+ConfigFile
+CorrectCount
+DARKCORNER
+DATALIB
+DD
+DDBJ
+DECnet
+DEF
+DONT
+DTD
+Degeneres
+DownCount
+EK
+EMBL
+EPROMs
+EQUIV
+ElizaSays
+EndOfMySelf
+EnterParameters
+Etzioni
+FASTA
+FDL
+FFN
+FIXME
+FN
+FS
+FUNC
+Fasta
+Flannery
+GAWK's
+GETARG
+GETURL
+GNUPLOT
+GNUPlot
+GUIs
+GenBank
+GenInfo
+GetHeader
+GetThisHeader
+GnuPlot
+HD
+HREF
+HWP
+HandleGET
+Hethmon
+Hoare
+Hoare's
+HotCount
+HttpService
+Humphrys
+HyperText
+IM
+IMG
+INTC
+IPX
+IPv
+ISBN
+IUB
+IUPAC
+IVE
+Immuno
+Init
+Internetworking
+JK
+JNJ
+JPG
+JPM
+Juergen
+Jul
+Jun
+KAREL
+KO
+Kabat's
+Kahrs
+LF
+Loebner
+Loui
+MCD
+MMC
+MMM
+MOBAG
+MOBAGWHO
+MOBFUN
+MOBVAR
+MOT
+MRK
+MSFT
+MailPipe
+MakeMaze
+MiniSQL
+MobAg
+MobCode
+MobileAgent
+Multiauthor
+MyHost
+MyInit
+MyJob
+MyOrigin
+MyPort
+MyPrefix
+MyProxy
+NBRF
+NCBI
+NCBI's
+NF
+NR
+NetService
+NeutralCount
+NewLength
+Nof
+Nov
+Novell's
+ORS
+Oren
+PARAM
+PARAMS
+PARAMs
+PATCHLEVEL
+PDF
+PG
+PIR
+PNG
+POPService
+POSIXed
+PROT
+PROTBASE
+PS
+Param
+Perlis
+PointLight
+PostAgent
+PostScript
+Pragma
+Prez
+ProxyPort
+REMCONF
+RFCs
+RP
+RT
+ReadConfig
+ReadMySelf
+ReadQuotes
+Rumpelstilzchen
+SA
+SBC
+SNMP
+SPAK
+SRC
+STARTOFRANGE
+STATIST
+STOXPRED
+SUBSEP
+Salmagundi
+SaveConfig
+Sbjct
+SendMail
+Sep
+SetUpEliza
+SetUpServer
+StartELIZA
+StockCount
+TD
+TR
+Tck
+Tcl
+Teukolsky
+Texinfo
+Tk
+TopDoc
+TopFooter
+TopHeader
+UL
+UMBC
+URI
+URLCHK
+URLfile
+UTX
+UpCount
+VLINK
+VRML
+VRMLtest
+Vetterling
+WEBGRAB
+WINNT
+WMT
+Waterman's
+Weizenbaum
+WorldWideWeb
+XBM
+XCF
+XINU
+XOM
+XP
+XSIZE
+XYZ
+YOURE
+YOUVE
+YSIZE
+YahooData
+YouSay
+abcdef
+acm
+adelphia
+adenosine
+advperl
+ai
+ambientIntensity
+amd
+arnold
+asc
+ascii
+asis
+au
+awk
+awkforai
+awkinet
+bbs
+bierce
+bigskip
+bioskills
+bitcont
+biz
+blastcl
+blastmail
+blastn
+blasturl
+boutell
+br
+caccaccatggacagcaaa
+canberra
+cgi
+cgilib
+ch
+chargen
+charset
+chayden
+chrisc
+cindex
+codon
+columnfractions
+com
+compapp
+config
+conj
+cont
+contrib
+coprocess
+copyleft
+copyrightable
+coreserv
+cp
+cr
+crontab
+csv
+cytidine
+dartmouth
+datacount
+daycount
+dbj
+dcu
+dd
+de
+dec
+defeasible
+denhaag
+deontic
+detailmenu
+dev
+devvax
+df
+dfn
+dict
+diffuseColor
+dir
+dircategory
+direntry
+dist
+ducktown
+edu
+eg
+ek
+eliza
+emailhost
+emb
+embedpc
+emph
+endfile
+epd
+evenheading
+exp
+fakenode
+fasta
+ff
+ffffff
+fi
+filenet
+filll
+finalout
+fingerclient
+fn
+foo
+fr
+fsbassociates
+fsf
+ftest
+gawcon
+gawkinet
+gawknet
+gawnetf
+gd
+geninfo
+getline
+geturl
+gif
+gnl
+gnuawk
+gnuplot
+gov
+groundAngle
+groundColor
+gsub
+guanine
+halign
+headitem
+hexdigs
+hfil
+highgate
+hrule
+htm
+html
+htmlx
+http
+httpd
+https
+httpserver
+hughes
+humphrys
+iX
+ibeta
+ibm
+ie
+ifhtml
+ifinfo
+ifnotinfo
+ifnottex
+iftex
+igawk
+inet
+inetlib
+inmargin
+insertcopying
+int
+intc
+intel
+interline
+introcb
+invsqrt
+ip
+irc
+iso
+java
+jp
+jpl
+kabat
+kazusa
+keto
+keynes
+kohala
+laplace
+len
+lflashlight
+li
+libc
+lifeisgood
+lineo
+linespace
+linux
+localhost
+localport
+loebner
+loui
+mailto
+marx
+mkdir
+mobag
+moritz
+multiline
+multitable
+myhost
+nAgent
+nBEGIN
+nThe
+nThis
+nasa
+ncbi
+netblast
+netcon
+netcraft
+netfunny
+netgawf
+netgawk
+netscape
+netstat
+nih
+nl
+nlm
+nntp
+noalign
+nof
+noindent
+noncausal
+noncommercially
+nph
+nr
+nthese
+nwe
+oddheading
+offinterlineskip
+openURL
+oreilly
+org
+overfulls
+pF
+paris
+passwd
+pdb
+pdict
+perl
+pir
+png
+postoffice
+pre
+prepinfo
+prf
+printenv
+printf
+printindex
+protbase
+ps
+pt
+purdue
+purine
+pxref
+pyrimidine
+qold
+rand
+readnews
+remconf
+remoteport
+rendez
+retr
+rf
+rflashlight
+rhf
+rm
+rstevens
+rvices
+samp
+sapiens
+sc
+scriptics
+sd
+seealso
+seeentry
+serv
+serweb
+setTimeout
+setchapternewpage
+setfilename
+settitle
+sez
+shtml
+skeeve
+skyAngle
+skyColor
+smallbook
+smallexample
+smtp
+softbot
+sp
+spak
+spinoza
+spoonsful
+sprintf
+srand
+statist
+stderr
+stdin
+stdout
+stoxdata
+stoxpred
+str
+strftime
+subentry
+subj
+subjold
+sublicense
+subnode
+substr
+subsubsection
+suse
+synchronicity
+syncodeindex
+synindex
+systime
+tcl
+tcp
+tcpcon
+tcpip
+technicalinfo
+testserv
+tex
+texinfo
+tgcttggctgaggagccataggacgagagcttcctggtgaagtgtgtttcttgaaatcat
+tggtgaagtgtgtttcttg
+thischapter
+thispage
+thttp
+thymidine
+titlepage
+tjhsst
+tmp
+tolower
+toupper
+ttytst
+tutest
+txt
+uclinux
+udp
+uk
+ul
+umbc
+uname
+unnumberedsec
+unregarded
+untp
+uref
+urgen
+urgen's
+uri
+uridine
+url
+urlchk
+userfriendly
+utf
+uthscsa
+val
+var
+vars
+vbox
+vous
+vr
+vrml
+vrule
+vskip
+webclient
+webgrab
+webser
+webserx
+wold
+wotsit
+wouldnt
+wustl
+www
+xbm
+xinu
+xrds
+youre
+yrange
diff --git a/support/ChangeLog b/support/ChangeLog
index 5f6e7bc2..92caed29 100644
--- a/support/ChangeLog
+++ b/support/ChangeLog
@@ -1,3 +1,7 @@
+2020-09-24         Arnold D. Robbins     <arnold@skeeve.com>
+
+	* dfa.c, dfa.h: Synced from GNULIB.
+
 2020-09-18         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* cdefs.h, dfa.c, intprops.h, regcomp.c, regex.h, regex_internal.h,
diff --git a/support/dfa.c b/support/dfa.c
index 641f422a..d47acfe2 100644
--- a/support/dfa.c
+++ b/support/dfa.c
@@ -3656,8 +3656,8 @@ free_mbdata (struct dfa *d)
 }
 
 /* Return true if every construct in D is supported by this DFA matcher.  */
-static bool _GL_ATTRIBUTE_PURE
-dfa_supported (struct dfa const *d)
+bool
+dfasupported (struct dfa const *d)
 {
   for (idx_t i = 0; i < d->tindex; i++)
     {
@@ -3813,7 +3813,7 @@ dfacomp (char const *s, idx_t len, struct dfa *d, bool searchflag)
 
   dfassbuild (d);
 
-  if (dfa_supported (d))
+  if (dfasupported (d))
     {
       maybe_disable_superset_dfa (d);
       dfaanalyze (d, searchflag);
diff --git a/support/dfa.h b/support/dfa.h
index c5bff898..2f77f263 100644
--- a/support/dfa.h
+++ b/support/dfa.h
@@ -113,6 +113,9 @@ extern struct dfa *dfasuperset (struct dfa const *d) _GL_ATTRIBUTE_PURE;
 /* The DFA is likely to be fast.  */
 extern bool dfaisfast (struct dfa const *) _GL_ATTRIBUTE_PURE;
 
+/* Return true if every construct in D is supported by this DFA matcher.  */
+extern bool dfasupported (struct dfa const *) _GL_ATTRIBUTE_PURE;
+
 /* Free the storage held by the components of a struct dfa. */
 extern void dfafree (struct dfa *);