Merge branch 'gawk-4.1-stable'

7 files changed, 598 insertions, 630 deletions

diff --git a/ChangeLog b/ChangeLog
index f9f4549e..85b83da3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2014-08-26         Arnold D. Robbins     <arnold@skeeve.com>
 
+	* regcomp.c, regex_internal.c: Sync with GBLIC. Why not.
+
+	Unrelated:
+
 	Remove support for MirBSD. It uglified the code too much
 	for no discernable gain.
 
diff --git a/doc/ChangeLog b/doc/ChangeLog
index ddd2280e..b6a13dc7 100644
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -1,5 +1,11 @@
 2014-08-26         Arnold D. Robbins     <arnold@skeeve.com>
 
+	* gawktexi.in: Use a different mechanism to exclude
+	exercises. Remove use of LC_ALL in an example; doesn't seem
+	to be needed anymore.
+
+	Unrelated:
+
 	* gawktexi.in: Document that MirBSD is no longer supported.
 
 2014-08-25         Arnold D. Robbins     <arnold@skeeve.com>
diff --git a/doc/gawk.info b/doc/gawk.info
index ef7847df..514965f4 100644
--- a/doc/gawk.info
+++ b/doc/gawk.info
@@ -219,7 +219,6 @@ entitled "GNU Free Documentation License".
 * Command-line directories::            What happens if you put a directory on
                                         the command line.
 * Input Summary::                       Input summary.
-
 * Input Exercises::                     Exercises.
 * Print::                               The `print' statement.
 * Print Examples::                      Simple examples of `print'
@@ -245,7 +244,6 @@ entitled "GNU Free Documentation License".
 * Close Files And Pipes::               Closing Input and Output Files and
                                         Pipes.
 * Output Summary::                      Output summary.
-
 * Output Exercises::                    Exercises.
 * Values::                              Constants, Variables, and Regular
                                         Expressions.
@@ -433,7 +431,6 @@ entitled "GNU Free Documentation License".
                                         information.
 * Walking Arrays::                      A function to walk arrays of arrays.
 * Library Functions Summary::           Summary of library functions.
-
 * Library Exercises::                   Exercises.
 * Running Examples::                    How to run these examples.
 * Clones::                              Clones of common utilities.
@@ -465,7 +462,6 @@ entitled "GNU Free Documentation License".
 * Signature Program::                   People do amazing things with too much
                                         time on their hands.
 * Programs Summary::                    Summary of programs.
-
 * Programs Exercises::                  Exercises.
 * Nondecimal Data::                     Allowing nondecimal input data.
 * Array Sorting::                       Facilities for controlling array
@@ -588,7 +584,6 @@ entitled "GNU Free Documentation License".
                                         and `sleep()'.
 * gawkextlib::                          The `gawkextlib' project.
 * Extension summary::                   Extension summary.
-
 * Extension Exercises::                 Exercises.
 * V7/SVR3.1::                           The major changes between V7 and
                                         System V Release 3.1.
@@ -2047,8 +2042,8 @@ summarize, select, and rearrange the output of another utility.  It uses
 features that haven't been covered yet, so don't worry if you don't
 understand all the details:
 
-     LC_ALL=C ls -l | awk '$6 == "Nov" { sum += $5 }
-                           END { print sum }'
+     ls -l | awk '$6 == "Nov" { sum += $5 }
+                  END { print sum }'
 
    This command prints the total number of bytes in all the files in the
 current directory that were last modified in November (of any year).
@@ -4079,7 +4074,6 @@ have to be named on the `awk' command line (*note Getline::).
 * Command-line directories::    What happens if you put a directory on the
                                 command line.
 * Input Summary::               Input summary.
-
 * Input Exercises::             Exercises.
 
 
@@ -6020,7 +6014,6 @@ function.
                                 descriptors.
 * Close Files And Pipes::       Closing Input and Output Files and Pipes.
 * Output Summary::              Output summary.
-
 * Output Exercises::            Exercises.
 
 
@@ -14268,7 +14261,6 @@ for different implementations of `awk' is pretty straightforward.
 * Group Functions::             Functions for getting group information.
 * Walking Arrays::              A function to walk arrays of arrays.
 * Library Functions Summary::   Summary of library functions.
-
 * Library Exercises::           Exercises.
 
    ---------- Footnotes ----------
@@ -16111,7 +16103,6 @@ Library Functions::.
 * Clones::                      Clones of common utilities.
 * Miscellaneous Programs::      Some interesting `awk' programs.
 * Programs Summary::            Summary of programs.
-
 * Programs Exercises::          Exercises.
 
 
@@ -22337,7 +22328,6 @@ sample extensions are automatically built and installed when `gawk' is.
                                 `gawk'.
 * gawkextlib::                  The `gawkextlib' project.
 * Extension summary::           Extension summary.
-
 * Extension Exercises::         Exercises.
 
 
@@ -34029,552 +34019,552 @@ Index
 
 Tag Table:
 Node: Top1204
-Node: Foreword41863
-Node: Preface46208
-Ref: Preface-Footnote-149231
-Ref: Preface-Footnote-249338
-Node: History49570
-Node: Names51944
-Ref: Names-Footnote-153038
-Node: This Manual53184
-Ref: This Manual-Footnote-158963
-Node: Conventions59063
-Node: Manual History61408
-Ref: Manual History-Footnote-164484
-Ref: Manual History-Footnote-264525
-Node: How To Contribute64599
-Node: Acknowledgments65838
-Node: Getting Started70586
-Node: Running gawk73020
-Node: One-shot74210
-Node: Read Terminal75435
-Ref: Read Terminal-Footnote-177398
-Node: Long77569
-Node: Executable Scripts78963
-Ref: Executable Scripts-Footnote-181764
-Node: Comments81866
-Node: Quoting84339
-Node: DOS Quoting89652
-Node: Sample Data Files90327
-Node: Very Simple92934
-Node: Two Rules97693
-Node: More Complex99587
-Ref: More Complex-Footnote-1102519
-Node: Statements/Lines102604
-Ref: Statements/Lines-Footnote-1107060
-Node: Other Features107325
-Node: When108253
-Ref: When-Footnote-1110009
-Node: Intro Summary110074
-Node: Invoking Gawk110957
-Node: Command Line112472
-Node: Options113263
-Ref: Options-Footnote-1128910
-Node: Other Arguments128935
-Node: Naming Standard Input131597
-Node: Environment Variables132690
-Node: AWKPATH Variable133248
-Ref: AWKPATH Variable-Footnote-1136114
-Ref: AWKPATH Variable-Footnote-2136159
-Node: AWKLIBPATH Variable136419
-Node: Other Environment Variables137178
-Node: Exit Status140630
-Node: Include Files141305
-Node: Loading Shared Libraries144883
-Node: Obsolete146267
-Node: Undocumented146964
-Node: Invoking Summary147231
-Node: Regexp148831
-Node: Regexp Usage150290
-Node: Escape Sequences152323
-Node: Regexp Operators158223
-Ref: Regexp Operators-Footnote-1165654
-Ref: Regexp Operators-Footnote-2165801
-Node: Bracket Expressions165899
-Ref: table-char-classes167921
-Node: GNU Regexp Operators170861
-Node: Case-sensitivity174570
-Ref: Case-sensitivity-Footnote-1177462
-Ref: Case-sensitivity-Footnote-2177697
-Node: Leftmost Longest177805
-Node: Computed Regexps179006
-Node: Regexp Summary182378
-Node: Reading Files183847
-Node: Records185940
-Node: awk split records186662
-Node: gawk split records191520
-Ref: gawk split records-Footnote-1196041
-Node: Fields196078
-Ref: Fields-Footnote-1199042
-Node: Nonconstant Fields199128
-Ref: Nonconstant Fields-Footnote-1201358
-Node: Changing Fields201560
-Node: Field Separators207514
-Node: Default Field Splitting210216
-Node: Regexp Field Splitting211333
-Node: Single Character Fields214660
-Node: Command Line Field Separator215719
-Node: Full Line Fields219145
-Ref: Full Line Fields-Footnote-1219653
-Node: Field Splitting Summary219699
-Ref: Field Splitting Summary-Footnote-1222831
-Node: Constant Size222932
-Node: Splitting By Content227538
-Ref: Splitting By Content-Footnote-1231611
-Node: Multiple Line231651
-Ref: Multiple Line-Footnote-1237507
-Node: Getline237686
-Node: Plain Getline239897
-Node: Getline/Variable241992
-Node: Getline/File243139
-Node: Getline/Variable/File244523
-Ref: Getline/Variable/File-Footnote-1246122
-Node: Getline/Pipe246209
-Node: Getline/Variable/Pipe248895
-Node: Getline/Coprocess250002
-Node: Getline/Variable/Coprocess251254
-Node: Getline Notes251991
-Node: Getline Summary254795
-Ref: table-getline-variants255203
-Node: Read Timeout256115
-Ref: Read Timeout-Footnote-1259942
-Node: Command-line directories260000
-Node: Input Summary260904
-Node: Input Exercises264041
-Node: Printing264774
-Node: Print266497
-Node: Print Examples267990
-Node: Output Separators270769
-Node: OFMT272785
-Node: Printf274143
-Node: Basic Printf275049
-Node: Control Letters276588
-Node: Format Modifiers280579
-Node: Printf Examples286606
-Node: Redirection289070
-Node: Special Files296042
-Node: Special FD296575
-Ref: Special FD-Footnote-1300172
-Node: Special Network300246
-Node: Special Caveats301096
-Node: Close Files And Pipes301892
-Ref: Close Files And Pipes-Footnote-1309053
-Ref: Close Files And Pipes-Footnote-2309201
-Node: Output Summary309351
-Node: Output Exercises310348
-Node: Expressions311028
-Node: Values312213
-Node: Constants312889
-Node: Scalar Constants313569
-Ref: Scalar Constants-Footnote-1314428
-Node: Nondecimal-numbers314678
-Node: Regexp Constants317678
-Node: Using Constant Regexps318153
-Node: Variables321225
-Node: Using Variables321880
-Node: Assignment Options323604
-Node: Conversion325479
-Node: Strings And Numbers326003
-Ref: Strings And Numbers-Footnote-1329065
-Node: Locale influences conversions329174
-Ref: table-locale-affects331891
-Node: All Operators332479
-Node: Arithmetic Ops333109
-Node: Concatenation335614
-Ref: Concatenation-Footnote-1338433
-Node: Assignment Ops338539
-Ref: table-assign-ops343522
-Node: Increment Ops344825
-Node: Truth Values and Conditions348263
-Node: Truth Values349346
-Node: Typing and Comparison350395
-Node: Variable Typing351188
-Node: Comparison Operators354840
-Ref: table-relational-ops355250
-Node: POSIX String Comparison358800
-Ref: POSIX String Comparison-Footnote-1359884
-Node: Boolean Ops360022
-Ref: Boolean Ops-Footnote-1364097
-Node: Conditional Exp364188
-Node: Function Calls365915
-Node: Precedence369795
-Node: Locales373464
-Node: Expressions Summary375095
-Node: Patterns and Actions377636
-Node: Pattern Overview378752
-Node: Regexp Patterns380429
-Node: Expression Patterns380972
-Node: Ranges384752
-Node: BEGIN/END387858
-Node: Using BEGIN/END388620
-Ref: Using BEGIN/END-Footnote-1391356
-Node: I/O And BEGIN/END391462
-Node: BEGINFILE/ENDFILE393733
-Node: Empty396664
-Node: Using Shell Variables396981
-Node: Action Overview399264
-Node: Statements401591
-Node: If Statement403439
-Node: While Statement404937
-Node: Do Statement406981
-Node: For Statement408137
-Node: Switch Statement411289
-Node: Break Statement413677
-Node: Continue Statement415718
-Node: Next Statement417543
-Node: Nextfile Statement419933
-Node: Exit Statement422569
-Node: Built-in Variables424973
-Node: User-modified426100
-Ref: User-modified-Footnote-1433789
-Node: Auto-set433851
-Ref: Auto-set-Footnote-1446770
-Ref: Auto-set-Footnote-2446975
-Node: ARGC and ARGV447031
-Node: Pattern Action Summary450935
-Node: Arrays453158
-Node: Array Basics454707
-Node: Array Intro455533
-Ref: figure-array-elements457506
-Ref: Array Intro-Footnote-1460030
-Node: Reference to Elements460158
-Node: Assigning Elements462608
-Node: Array Example463099
-Node: Scanning an Array464831
-Node: Controlling Scanning467832
-Ref: Controlling Scanning-Footnote-1473005
-Node: Delete473321
-Ref: Delete-Footnote-1476072
-Node: Numeric Array Subscripts476129
-Node: Uninitialized Subscripts478312
-Node: Multidimensional479937
-Node: Multiscanning483050
-Node: Arrays of Arrays484639
-Node: Arrays Summary489302
-Node: Functions491407
-Node: Built-in492280
-Node: Calling Built-in493358
-Node: Numeric Functions495346
-Ref: Numeric Functions-Footnote-1500182
-Ref: Numeric Functions-Footnote-2500539
-Ref: Numeric Functions-Footnote-3500587
-Node: String Functions500856
-Ref: String Functions-Footnote-1523853
-Ref: String Functions-Footnote-2523982
-Ref: String Functions-Footnote-3524230
-Node: Gory Details524317
-Ref: table-sub-escapes526090
-Ref: table-sub-proposed527610
-Ref: table-posix-sub528974
-Ref: table-gensub-escapes530514
-Ref: Gory Details-Footnote-1531690
-Node: I/O Functions531841
-Ref: I/O Functions-Footnote-1538951
-Node: Time Functions539098
-Ref: Time Functions-Footnote-1549562
-Ref: Time Functions-Footnote-2549630
-Ref: Time Functions-Footnote-3549788
-Ref: Time Functions-Footnote-4549899
-Ref: Time Functions-Footnote-5550011
-Ref: Time Functions-Footnote-6550238
-Node: Bitwise Functions550504
-Ref: table-bitwise-ops551066
-Ref: Bitwise Functions-Footnote-1555311
-Node: Type Functions555495
-Node: I18N Functions556637
-Node: User-defined558282
-Node: Definition Syntax559086
-Ref: Definition Syntax-Footnote-1564399
-Node: Function Example564468
-Ref: Function Example-Footnote-1567108
-Node: Function Caveats567130
-Node: Calling A Function567648
-Node: Variable Scope568603
-Node: Pass By Value/Reference571591
-Node: Return Statement575101
-Node: Dynamic Typing578085
-Node: Indirect Calls579014
-Node: Functions Summary588727
-Node: Library Functions591266
-Ref: Library Functions-Footnote-1594885
-Ref: Library Functions-Footnote-2595028
-Node: Library Names595199
-Ref: Library Names-Footnote-1598672
-Ref: Library Names-Footnote-2598892
-Node: General Functions598978
-Node: Strtonum Function600006
-Node: Assert Function602786
-Node: Round Function606112
-Node: Cliff Random Function607653
-Node: Ordinal Functions608669
-Ref: Ordinal Functions-Footnote-1611734
-Ref: Ordinal Functions-Footnote-2611986
-Node: Join Function612197
-Ref: Join Function-Footnote-1613968
-Node: Getlocaltime Function614168
-Node: Readfile Function617904
-Node: Data File Management619743
-Node: Filetrans Function620375
-Node: Rewind Function624444
-Node: File Checking626002
-Ref: File Checking-Footnote-1627134
-Node: Empty Files627335
-Node: Ignoring Assigns629314
-Node: Getopt Function630868
-Ref: Getopt Function-Footnote-1642171
-Node: Passwd Functions642374
-Ref: Passwd Functions-Footnote-1651353
-Node: Group Functions651441
-Ref: Group Functions-Footnote-1659372
-Node: Walking Arrays659585
-Node: Library Functions Summary661188
-Node: Library Exercises662576
-Node: Sample Programs663856
-Node: Running Examples664627
-Node: Clones665355
-Node: Cut Program666579
-Node: Egrep Program676437
-Ref: Egrep Program-Footnote-1684024
-Node: Id Program684134
-Node: Split Program687788
-Ref: Split Program-Footnote-1691326
-Node: Tee Program691454
-Node: Uniq Program694241
-Node: Wc Program701662
-Ref: Wc Program-Footnote-1705927
-Node: Miscellaneous Programs706019
-Node: Dupword Program707232
-Node: Alarm Program709263
-Node: Translate Program714067
-Ref: Translate Program-Footnote-1718458
-Ref: Translate Program-Footnote-2718728
-Node: Labels Program718862
-Ref: Labels Program-Footnote-1722223
-Node: Word Sorting722307
-Node: History Sorting726350
-Node: Extract Program728186
-Node: Simple Sed735722
-Node: Igawk Program738784
-Ref: Igawk Program-Footnote-1753088
-Ref: Igawk Program-Footnote-2753289
-Node: Anagram Program753427
-Node: Signature Program756495
-Node: Programs Summary757742
-Node: Programs Exercises758957
-Node: Advanced Features762608
-Node: Nondecimal Data764556
-Node: Array Sorting766133
-Node: Controlling Array Traversal766830
-Node: Array Sorting Functions775110
-Ref: Array Sorting Functions-Footnote-1779017
-Node: Two-way I/O779211
-Ref: Two-way I/O-Footnote-1784155
-Ref: Two-way I/O-Footnote-2784334
-Node: TCP/IP Networking784416
-Node: Profiling787261
-Node: Advanced Features Summary794812
-Node: Internationalization796676
-Node: I18N and L10N798156
-Node: Explaining gettext798842
-Ref: Explaining gettext-Footnote-1803868
-Ref: Explaining gettext-Footnote-2804052
-Node: Programmer i18n804217
-Ref: Programmer i18n-Footnote-1809011
-Node: Translator i18n809060
-Node: String Extraction809854
-Ref: String Extraction-Footnote-1810987
-Node: Printf Ordering811073
-Ref: Printf Ordering-Footnote-1813855
-Node: I18N Portability813919
-Ref: I18N Portability-Footnote-1816368
-Node: I18N Example816431
-Ref: I18N Example-Footnote-1819137
-Node: Gawk I18N819209
-Node: I18N Summary819847
-Node: Debugger821186
-Node: Debugging822208
-Node: Debugging Concepts822649
-Node: Debugging Terms824505
-Node: Awk Debugging827102
-Node: Sample Debugging Session827994
-Node: Debugger Invocation828514
-Node: Finding The Bug829847
-Node: List of Debugger Commands836329
-Node: Breakpoint Control837661
-Node: Debugger Execution Control841325
-Node: Viewing And Changing Data844685
-Node: Execution Stack848043
-Node: Debugger Info849556
-Node: Miscellaneous Debugger Commands853550
-Node: Readline Support858734
-Node: Limitations859626
-Node: Debugging Summary861900
-Node: Arbitrary Precision Arithmetic863068
-Node: Computer Arithmetic864555
-Ref: Computer Arithmetic-Footnote-1868942
-Node: Math Definitions868999
-Ref: table-ieee-formats872288
-Ref: Math Definitions-Footnote-1872828
-Node: MPFR features872931
-Node: FP Math Caution874548
-Ref: FP Math Caution-Footnote-1875598
-Node: Inexactness of computations875967
-Node: Inexact representation876915
-Node: Comparing FP Values878270
-Node: Errors accumulate879234
-Node: Getting Accuracy880667
-Node: Try To Round883326
-Node: Setting precision884225
-Ref: table-predefined-precision-strings884907
-Node: Setting the rounding mode886700
-Ref: table-gawk-rounding-modes887064
-Ref: Setting the rounding mode-Footnote-1890518
-Node: Arbitrary Precision Integers890697
-Ref: Arbitrary Precision Integers-Footnote-1894470
-Node: POSIX Floating Point Problems894619
-Ref: POSIX Floating Point Problems-Footnote-1898495
-Node: Floating point summary898533
-Node: Dynamic Extensions900737
-Node: Extension Intro902290
-Node: Plugin License903555
-Node: Extension Mechanism Outline904240
-Ref: figure-load-extension904664
-Ref: figure-load-new-function906149
-Ref: figure-call-new-function907151
-Node: Extension API Description909135
-Node: Extension API Functions Introduction910585
-Node: General Data Types915452
-Ref: General Data Types-Footnote-1921145
-Node: Requesting Values921444
-Ref: table-value-types-returned922181
-Node: Memory Allocation Functions923139
-Ref: Memory Allocation Functions-Footnote-1925886
-Node: Constructor Functions925982
-Node: Registration Functions927740
-Node: Extension Functions928425
-Node: Exit Callback Functions930727
-Node: Extension Version String931975
-Node: Input Parsers932625
-Node: Output Wrappers942439
-Node: Two-way processors946955
-Node: Printing Messages949159
-Ref: Printing Messages-Footnote-1950236
-Node: Updating `ERRNO'950388
-Node: Accessing Parameters951127
-Node: Symbol Table Access952357
-Node: Symbol table by name952871
-Node: Symbol table by cookie954847
-Ref: Symbol table by cookie-Footnote-1958980
-Node: Cached values959043
-Ref: Cached values-Footnote-1962547
-Node: Array Manipulation962638
-Ref: Array Manipulation-Footnote-1963736
-Node: Array Data Types963775
-Ref: Array Data Types-Footnote-1966478
-Node: Array Functions966570
-Node: Flattening Arrays970444
-Node: Creating Arrays977296
-Node: Extension API Variables982027
-Node: Extension Versioning982663
-Node: Extension API Informational Variables984564
-Node: Extension API Boilerplate985650
-Node: Finding Extensions989454
-Node: Extension Example990014
-Node: Internal File Description990744
-Node: Internal File Ops994835
-Ref: Internal File Ops-Footnote-11006267
-Node: Using Internal File Ops1006407
-Ref: Using Internal File Ops-Footnote-11008754
-Node: Extension Samples1009022
-Node: Extension Sample File Functions1010546
-Node: Extension Sample Fnmatch1018114
-Node: Extension Sample Fork1019596
-Node: Extension Sample Inplace1020809
-Node: Extension Sample Ord1022484
-Node: Extension Sample Readdir1023320
-Ref: table-readdir-file-types1024176
-Node: Extension Sample Revout1024975
-Node: Extension Sample Rev2way1025566
-Node: Extension Sample Read write array1026307
-Node: Extension Sample Readfile1028186
-Node: Extension Sample API Tests1029286
-Node: Extension Sample Time1029811
-Node: gawkextlib1031126
-Node: Extension summary1033939
-Node: Extension Exercises1037632
-Node: Language History1038354
-Node: V7/SVR3.11039997
-Node: SVR41042317
-Node: POSIX1043759
-Node: BTL1045145
-Node: POSIX/GNU1045879
-Node: Feature History1051655
-Node: Common Extensions1064746
-Node: Ranges and Locales1066058
-Ref: Ranges and Locales-Footnote-11070675
-Ref: Ranges and Locales-Footnote-21070702
-Ref: Ranges and Locales-Footnote-31070936
-Node: Contributors1071157
-Node: History summary1076582
-Node: Installation1077951
-Node: Gawk Distribution1078902
-Node: Getting1079386
-Node: Extracting1080210
-Node: Distribution contents1081852
-Node: Unix Installation1087622
-Node: Quick Installation1088239
-Node: Additional Configuration Options1090681
-Node: Configuration Philosophy1092419
-Node: Non-Unix Installation1094770
-Node: PC Installation1095228
-Node: PC Binary Installation1096539
-Node: PC Compiling1098387
-Ref: PC Compiling-Footnote-11101386
-Node: PC Testing1101491
-Node: PC Using1102667
-Node: Cygwin1106819
-Node: MSYS1107628
-Node: VMS Installation1108142
-Node: VMS Compilation1108938
-Ref: VMS Compilation-Footnote-11110160
-Node: VMS Dynamic Extensions1110218
-Node: VMS Installation Details1111591
-Node: VMS Running1113843
-Node: VMS GNV1116677
-Node: VMS Old Gawk1117400
-Node: Bugs1117870
-Node: Other Versions1121874
-Node: Installation summary1128101
-Node: Notes1129157
-Node: Compatibility Mode1130022
-Node: Additions1130804
-Node: Accessing The Source1131729
-Node: Adding Code1133165
-Node: New Ports1139343
-Node: Derived Files1143824
-Ref: Derived Files-Footnote-11148905
-Ref: Derived Files-Footnote-21148939
-Ref: Derived Files-Footnote-31149535
-Node: Future Extensions1149649
-Node: Implementation Limitations1150255
-Node: Extension Design1151503
-Node: Old Extension Problems1152657
-Ref: Old Extension Problems-Footnote-11154174
-Node: Extension New Mechanism Goals1154231
-Ref: Extension New Mechanism Goals-Footnote-11157591
-Node: Extension Other Design Decisions1157780
-Node: Extension Future Growth1159886
-Node: Old Extension Mechanism1160722
-Node: Notes summary1162484
-Node: Basic Concepts1163670
-Node: Basic High Level1164351
-Ref: figure-general-flow1164623
-Ref: figure-process-flow1165222
-Ref: Basic High Level-Footnote-11168451
-Node: Basic Data Typing1168636
-Node: Glossary1171964
-Node: Copying1197116
-Node: GNU Free Documentation License1234672
-Node: Index1259808
+Node: Foreword41858
+Node: Preface46203
+Ref: Preface-Footnote-149226
+Ref: Preface-Footnote-249333
+Node: History49565
+Node: Names51939
+Ref: Names-Footnote-153033
+Node: This Manual53179
+Ref: This Manual-Footnote-158958
+Node: Conventions59058
+Node: Manual History61403
+Ref: Manual History-Footnote-164479
+Ref: Manual History-Footnote-264520
+Node: How To Contribute64594
+Node: Acknowledgments65833
+Node: Getting Started70581
+Node: Running gawk73015
+Node: One-shot74205
+Node: Read Terminal75430
+Ref: Read Terminal-Footnote-177393
+Node: Long77564
+Node: Executable Scripts78958
+Ref: Executable Scripts-Footnote-181759
+Node: Comments81861
+Node: Quoting84334
+Node: DOS Quoting89647
+Node: Sample Data Files90322
+Node: Very Simple92929
+Node: Two Rules97688
+Node: More Complex99582
+Ref: More Complex-Footnote-1102496
+Node: Statements/Lines102581
+Ref: Statements/Lines-Footnote-1107037
+Node: Other Features107302
+Node: When108230
+Ref: When-Footnote-1109986
+Node: Intro Summary110051
+Node: Invoking Gawk110934
+Node: Command Line112449
+Node: Options113240
+Ref: Options-Footnote-1128887
+Node: Other Arguments128912
+Node: Naming Standard Input131574
+Node: Environment Variables132667
+Node: AWKPATH Variable133225
+Ref: AWKPATH Variable-Footnote-1136091
+Ref: AWKPATH Variable-Footnote-2136136
+Node: AWKLIBPATH Variable136396
+Node: Other Environment Variables137155
+Node: Exit Status140607
+Node: Include Files141282
+Node: Loading Shared Libraries144860
+Node: Obsolete146244
+Node: Undocumented146941
+Node: Invoking Summary147208
+Node: Regexp148808
+Node: Regexp Usage150267
+Node: Escape Sequences152300
+Node: Regexp Operators158200
+Ref: Regexp Operators-Footnote-1165631
+Ref: Regexp Operators-Footnote-2165778
+Node: Bracket Expressions165876
+Ref: table-char-classes167898
+Node: GNU Regexp Operators170838
+Node: Case-sensitivity174547
+Ref: Case-sensitivity-Footnote-1177439
+Ref: Case-sensitivity-Footnote-2177674
+Node: Leftmost Longest177782
+Node: Computed Regexps178983
+Node: Regexp Summary182355
+Node: Reading Files183824
+Node: Records185916
+Node: awk split records186638
+Node: gawk split records191496
+Ref: gawk split records-Footnote-1196017
+Node: Fields196054
+Ref: Fields-Footnote-1199018
+Node: Nonconstant Fields199104
+Ref: Nonconstant Fields-Footnote-1201334
+Node: Changing Fields201536
+Node: Field Separators207490
+Node: Default Field Splitting210192
+Node: Regexp Field Splitting211309
+Node: Single Character Fields214636
+Node: Command Line Field Separator215695
+Node: Full Line Fields219121
+Ref: Full Line Fields-Footnote-1219629
+Node: Field Splitting Summary219675
+Ref: Field Splitting Summary-Footnote-1222807
+Node: Constant Size222908
+Node: Splitting By Content227514
+Ref: Splitting By Content-Footnote-1231587
+Node: Multiple Line231627
+Ref: Multiple Line-Footnote-1237483
+Node: Getline237662
+Node: Plain Getline239873
+Node: Getline/Variable241968
+Node: Getline/File243115
+Node: Getline/Variable/File244499
+Ref: Getline/Variable/File-Footnote-1246098
+Node: Getline/Pipe246185
+Node: Getline/Variable/Pipe248871
+Node: Getline/Coprocess249978
+Node: Getline/Variable/Coprocess251230
+Node: Getline Notes251967
+Node: Getline Summary254771
+Ref: table-getline-variants255179
+Node: Read Timeout256091
+Ref: Read Timeout-Footnote-1259918
+Node: Command-line directories259976
+Node: Input Summary260880
+Node: Input Exercises264017
+Node: Printing264750
+Node: Print266472
+Node: Print Examples267965
+Node: Output Separators270744
+Node: OFMT272760
+Node: Printf274118
+Node: Basic Printf275024
+Node: Control Letters276563
+Node: Format Modifiers280554
+Node: Printf Examples286581
+Node: Redirection289045
+Node: Special Files296017
+Node: Special FD296550
+Ref: Special FD-Footnote-1300147
+Node: Special Network300221
+Node: Special Caveats301071
+Node: Close Files And Pipes301867
+Ref: Close Files And Pipes-Footnote-1309028
+Ref: Close Files And Pipes-Footnote-2309176
+Node: Output Summary309326
+Node: Output Exercises310323
+Node: Expressions311003
+Node: Values312188
+Node: Constants312864
+Node: Scalar Constants313544
+Ref: Scalar Constants-Footnote-1314403
+Node: Nondecimal-numbers314653
+Node: Regexp Constants317653
+Node: Using Constant Regexps318128
+Node: Variables321200
+Node: Using Variables321855
+Node: Assignment Options323579
+Node: Conversion325454
+Node: Strings And Numbers325978
+Ref: Strings And Numbers-Footnote-1329040
+Node: Locale influences conversions329149
+Ref: table-locale-affects331866
+Node: All Operators332454
+Node: Arithmetic Ops333084
+Node: Concatenation335589
+Ref: Concatenation-Footnote-1338408
+Node: Assignment Ops338514
+Ref: table-assign-ops343497
+Node: Increment Ops344800
+Node: Truth Values and Conditions348238
+Node: Truth Values349321
+Node: Typing and Comparison350370
+Node: Variable Typing351163
+Node: Comparison Operators354815
+Ref: table-relational-ops355225
+Node: POSIX String Comparison358775
+Ref: POSIX String Comparison-Footnote-1359859
+Node: Boolean Ops359997
+Ref: Boolean Ops-Footnote-1364072
+Node: Conditional Exp364163
+Node: Function Calls365890
+Node: Precedence369770
+Node: Locales373439
+Node: Expressions Summary375070
+Node: Patterns and Actions377611
+Node: Pattern Overview378727
+Node: Regexp Patterns380404
+Node: Expression Patterns380947
+Node: Ranges384727
+Node: BEGIN/END387833
+Node: Using BEGIN/END388595
+Ref: Using BEGIN/END-Footnote-1391331
+Node: I/O And BEGIN/END391437
+Node: BEGINFILE/ENDFILE393708
+Node: Empty396639
+Node: Using Shell Variables396956
+Node: Action Overview399239
+Node: Statements401566
+Node: If Statement403414
+Node: While Statement404912
+Node: Do Statement406956
+Node: For Statement408112
+Node: Switch Statement411264
+Node: Break Statement413652
+Node: Continue Statement415693
+Node: Next Statement417518
+Node: Nextfile Statement419908
+Node: Exit Statement422544
+Node: Built-in Variables424948
+Node: User-modified426075
+Ref: User-modified-Footnote-1433764
+Node: Auto-set433826
+Ref: Auto-set-Footnote-1446745
+Ref: Auto-set-Footnote-2446950
+Node: ARGC and ARGV447006
+Node: Pattern Action Summary450910
+Node: Arrays453133
+Node: Array Basics454682
+Node: Array Intro455508
+Ref: figure-array-elements457481
+Ref: Array Intro-Footnote-1460005
+Node: Reference to Elements460133
+Node: Assigning Elements462583
+Node: Array Example463074
+Node: Scanning an Array464806
+Node: Controlling Scanning467807
+Ref: Controlling Scanning-Footnote-1472980
+Node: Delete473296
+Ref: Delete-Footnote-1476047
+Node: Numeric Array Subscripts476104
+Node: Uninitialized Subscripts478287
+Node: Multidimensional479912
+Node: Multiscanning483025
+Node: Arrays of Arrays484614
+Node: Arrays Summary489277
+Node: Functions491382
+Node: Built-in492255
+Node: Calling Built-in493333
+Node: Numeric Functions495321
+Ref: Numeric Functions-Footnote-1500157
+Ref: Numeric Functions-Footnote-2500514
+Ref: Numeric Functions-Footnote-3500562
+Node: String Functions500831
+Ref: String Functions-Footnote-1523828
+Ref: String Functions-Footnote-2523957
+Ref: String Functions-Footnote-3524205
+Node: Gory Details524292
+Ref: table-sub-escapes526065
+Ref: table-sub-proposed527585
+Ref: table-posix-sub528949
+Ref: table-gensub-escapes530489
+Ref: Gory Details-Footnote-1531665
+Node: I/O Functions531816
+Ref: I/O Functions-Footnote-1538926
+Node: Time Functions539073
+Ref: Time Functions-Footnote-1549537
+Ref: Time Functions-Footnote-2549605
+Ref: Time Functions-Footnote-3549763
+Ref: Time Functions-Footnote-4549874
+Ref: Time Functions-Footnote-5549986
+Ref: Time Functions-Footnote-6550213
+Node: Bitwise Functions550479
+Ref: table-bitwise-ops551041
+Ref: Bitwise Functions-Footnote-1555286
+Node: Type Functions555470
+Node: I18N Functions556612
+Node: User-defined558257
+Node: Definition Syntax559061
+Ref: Definition Syntax-Footnote-1564374
+Node: Function Example564443
+Ref: Function Example-Footnote-1567083
+Node: Function Caveats567105
+Node: Calling A Function567623
+Node: Variable Scope568578
+Node: Pass By Value/Reference571566
+Node: Return Statement575076
+Node: Dynamic Typing578060
+Node: Indirect Calls578989
+Node: Functions Summary588702
+Node: Library Functions591241
+Ref: Library Functions-Footnote-1594859
+Ref: Library Functions-Footnote-2595002
+Node: Library Names595173
+Ref: Library Names-Footnote-1598646
+Ref: Library Names-Footnote-2598866
+Node: General Functions598952
+Node: Strtonum Function599980
+Node: Assert Function602760
+Node: Round Function606086
+Node: Cliff Random Function607627
+Node: Ordinal Functions608643
+Ref: Ordinal Functions-Footnote-1611708
+Ref: Ordinal Functions-Footnote-2611960
+Node: Join Function612171
+Ref: Join Function-Footnote-1613942
+Node: Getlocaltime Function614142
+Node: Readfile Function617878
+Node: Data File Management619717
+Node: Filetrans Function620349
+Node: Rewind Function624418
+Node: File Checking625976
+Ref: File Checking-Footnote-1627108
+Node: Empty Files627309
+Node: Ignoring Assigns629288
+Node: Getopt Function630842
+Ref: Getopt Function-Footnote-1642145
+Node: Passwd Functions642348
+Ref: Passwd Functions-Footnote-1651327
+Node: Group Functions651415
+Ref: Group Functions-Footnote-1659346
+Node: Walking Arrays659559
+Node: Library Functions Summary661162
+Node: Library Exercises662550
+Node: Sample Programs663830
+Node: Running Examples664600
+Node: Clones665328
+Node: Cut Program666552
+Node: Egrep Program676410
+Ref: Egrep Program-Footnote-1683997
+Node: Id Program684107
+Node: Split Program687761
+Ref: Split Program-Footnote-1691299
+Node: Tee Program691427
+Node: Uniq Program694214
+Node: Wc Program701635
+Ref: Wc Program-Footnote-1705900
+Node: Miscellaneous Programs705992
+Node: Dupword Program707205
+Node: Alarm Program709236
+Node: Translate Program714040
+Ref: Translate Program-Footnote-1718431
+Ref: Translate Program-Footnote-2718701
+Node: Labels Program718835
+Ref: Labels Program-Footnote-1722196
+Node: Word Sorting722280
+Node: History Sorting726323
+Node: Extract Program728159
+Node: Simple Sed735695
+Node: Igawk Program738757
+Ref: Igawk Program-Footnote-1753061
+Ref: Igawk Program-Footnote-2753262
+Node: Anagram Program753400
+Node: Signature Program756468
+Node: Programs Summary757715
+Node: Programs Exercises758930
+Node: Advanced Features762581
+Node: Nondecimal Data764529
+Node: Array Sorting766106
+Node: Controlling Array Traversal766803
+Node: Array Sorting Functions775083
+Ref: Array Sorting Functions-Footnote-1778990
+Node: Two-way I/O779184
+Ref: Two-way I/O-Footnote-1784128
+Ref: Two-way I/O-Footnote-2784307
+Node: TCP/IP Networking784389
+Node: Profiling787234
+Node: Advanced Features Summary794785
+Node: Internationalization796649
+Node: I18N and L10N798129
+Node: Explaining gettext798815
+Ref: Explaining gettext-Footnote-1803841
+Ref: Explaining gettext-Footnote-2804025
+Node: Programmer i18n804190
+Ref: Programmer i18n-Footnote-1808984
+Node: Translator i18n809033
+Node: String Extraction809827
+Ref: String Extraction-Footnote-1810960
+Node: Printf Ordering811046
+Ref: Printf Ordering-Footnote-1813828
+Node: I18N Portability813892
+Ref: I18N Portability-Footnote-1816341
+Node: I18N Example816404
+Ref: I18N Example-Footnote-1819110
+Node: Gawk I18N819182
+Node: I18N Summary819820
+Node: Debugger821159
+Node: Debugging822181
+Node: Debugging Concepts822622
+Node: Debugging Terms824478
+Node: Awk Debugging827075
+Node: Sample Debugging Session827967
+Node: Debugger Invocation828487
+Node: Finding The Bug829820
+Node: List of Debugger Commands836302
+Node: Breakpoint Control837634
+Node: Debugger Execution Control841298
+Node: Viewing And Changing Data844658
+Node: Execution Stack848016
+Node: Debugger Info849529
+Node: Miscellaneous Debugger Commands853523
+Node: Readline Support858707
+Node: Limitations859599
+Node: Debugging Summary861873
+Node: Arbitrary Precision Arithmetic863041
+Node: Computer Arithmetic864528
+Ref: Computer Arithmetic-Footnote-1868915
+Node: Math Definitions868972
+Ref: table-ieee-formats872261
+Ref: Math Definitions-Footnote-1872801
+Node: MPFR features872904
+Node: FP Math Caution874521
+Ref: FP Math Caution-Footnote-1875571
+Node: Inexactness of computations875940
+Node: Inexact representation876888
+Node: Comparing FP Values878243
+Node: Errors accumulate879207
+Node: Getting Accuracy880640
+Node: Try To Round883299
+Node: Setting precision884198
+Ref: table-predefined-precision-strings884880
+Node: Setting the rounding mode886673
+Ref: table-gawk-rounding-modes887037
+Ref: Setting the rounding mode-Footnote-1890491
+Node: Arbitrary Precision Integers890670
+Ref: Arbitrary Precision Integers-Footnote-1894443
+Node: POSIX Floating Point Problems894592
+Ref: POSIX Floating Point Problems-Footnote-1898468
+Node: Floating point summary898506
+Node: Dynamic Extensions900710
+Node: Extension Intro902262
+Node: Plugin License903527
+Node: Extension Mechanism Outline904212
+Ref: figure-load-extension904636
+Ref: figure-load-new-function906121
+Ref: figure-call-new-function907123
+Node: Extension API Description909107
+Node: Extension API Functions Introduction910557
+Node: General Data Types915424
+Ref: General Data Types-Footnote-1921117
+Node: Requesting Values921416
+Ref: table-value-types-returned922153
+Node: Memory Allocation Functions923111
+Ref: Memory Allocation Functions-Footnote-1925858
+Node: Constructor Functions925954
+Node: Registration Functions927712
+Node: Extension Functions928397
+Node: Exit Callback Functions930699
+Node: Extension Version String931947
+Node: Input Parsers932597
+Node: Output Wrappers942411
+Node: Two-way processors946927
+Node: Printing Messages949131
+Ref: Printing Messages-Footnote-1950208
+Node: Updating `ERRNO'950360
+Node: Accessing Parameters951099
+Node: Symbol Table Access952329
+Node: Symbol table by name952843
+Node: Symbol table by cookie954819
+Ref: Symbol table by cookie-Footnote-1958952
+Node: Cached values959015
+Ref: Cached values-Footnote-1962519
+Node: Array Manipulation962610
+Ref: Array Manipulation-Footnote-1963708
+Node: Array Data Types963747
+Ref: Array Data Types-Footnote-1966450
+Node: Array Functions966542
+Node: Flattening Arrays970416
+Node: Creating Arrays977268
+Node: Extension API Variables981999
+Node: Extension Versioning982635
+Node: Extension API Informational Variables984536
+Node: Extension API Boilerplate985622
+Node: Finding Extensions989426
+Node: Extension Example989986
+Node: Internal File Description990716
+Node: Internal File Ops994807
+Ref: Internal File Ops-Footnote-11006239
+Node: Using Internal File Ops1006379
+Ref: Using Internal File Ops-Footnote-11008726
+Node: Extension Samples1008994
+Node: Extension Sample File Functions1010518
+Node: Extension Sample Fnmatch1018086
+Node: Extension Sample Fork1019568
+Node: Extension Sample Inplace1020781
+Node: Extension Sample Ord1022456
+Node: Extension Sample Readdir1023292
+Ref: table-readdir-file-types1024148
+Node: Extension Sample Revout1024947
+Node: Extension Sample Rev2way1025538
+Node: Extension Sample Read write array1026279
+Node: Extension Sample Readfile1028158
+Node: Extension Sample API Tests1029258
+Node: Extension Sample Time1029783
+Node: gawkextlib1031098
+Node: Extension summary1033911
+Node: Extension Exercises1037604
+Node: Language History1038326
+Node: V7/SVR3.11039969
+Node: SVR41042289
+Node: POSIX1043731
+Node: BTL1045117
+Node: POSIX/GNU1045851
+Node: Feature History1051627
+Node: Common Extensions1064718
+Node: Ranges and Locales1066030
+Ref: Ranges and Locales-Footnote-11070647
+Ref: Ranges and Locales-Footnote-21070674
+Ref: Ranges and Locales-Footnote-31070908
+Node: Contributors1071129
+Node: History summary1076554
+Node: Installation1077923
+Node: Gawk Distribution1078874
+Node: Getting1079358
+Node: Extracting1080182
+Node: Distribution contents1081824
+Node: Unix Installation1087594
+Node: Quick Installation1088211
+Node: Additional Configuration Options1090653
+Node: Configuration Philosophy1092391
+Node: Non-Unix Installation1094742
+Node: PC Installation1095200
+Node: PC Binary Installation1096511
+Node: PC Compiling1098359
+Ref: PC Compiling-Footnote-11101358
+Node: PC Testing1101463
+Node: PC Using1102639
+Node: Cygwin1106791
+Node: MSYS1107600
+Node: VMS Installation1108114
+Node: VMS Compilation1108910
+Ref: VMS Compilation-Footnote-11110132
+Node: VMS Dynamic Extensions1110190
+Node: VMS Installation Details1111563
+Node: VMS Running1113815
+Node: VMS GNV1116649
+Node: VMS Old Gawk1117372
+Node: Bugs1117842
+Node: Other Versions1121846
+Node: Installation summary1128073
+Node: Notes1129129
+Node: Compatibility Mode1129994
+Node: Additions1130776
+Node: Accessing The Source1131701
+Node: Adding Code1133137
+Node: New Ports1139315
+Node: Derived Files1143796
+Ref: Derived Files-Footnote-11148877
+Ref: Derived Files-Footnote-21148911
+Ref: Derived Files-Footnote-31149507
+Node: Future Extensions1149621
+Node: Implementation Limitations1150227
+Node: Extension Design1151475
+Node: Old Extension Problems1152629
+Ref: Old Extension Problems-Footnote-11154146
+Node: Extension New Mechanism Goals1154203
+Ref: Extension New Mechanism Goals-Footnote-11157563
+Node: Extension Other Design Decisions1157752
+Node: Extension Future Growth1159858
+Node: Old Extension Mechanism1160694
+Node: Notes summary1162456
+Node: Basic Concepts1163642
+Node: Basic High Level1164323
+Ref: figure-general-flow1164595
+Ref: figure-process-flow1165194
+Ref: Basic High Level-Footnote-11168423
+Node: Basic Data Typing1168608
+Node: Glossary1171936
+Node: Copying1197088
+Node: GNU Free Documentation License1234644
+Node: Index1259780
 
 End Tag Table
diff --git a/doc/gawk.texi b/doc/gawk.texi
index 40e5c428..b418d4cf 100644
--- a/doc/gawk.texi
+++ b/doc/gawk.texi
@@ -575,9 +575,7 @@ particular records in a file and perform operations upon them.
 * Command-line directories::            What happens if you put a directory on
                                         the command line.
 * Input Summary::                       Input summary.
-@ifclear FOR_PRINT
 * Input Exercises::                     Exercises.
-@end ifclear
 * Print::                               The @code{print} statement.
 * Print Examples::                      Simple examples of @code{print}
                                         statements.
@@ -602,9 +600,7 @@ particular records in a file and perform operations upon them.
 * Close Files And Pipes::               Closing Input and Output Files and
                                         Pipes.
 * Output Summary::                      Output summary.
-@ifclear FOR_PRINT
 * Output Exercises::                    Exercises.
-@end ifclear
 * Values::                              Constants, Variables, and Regular
                                         Expressions.
 * Constants::                           String, numeric and regexp constants.
@@ -791,9 +787,7 @@ particular records in a file and perform operations upon them.
                                         information.
 * Walking Arrays::                      A function to walk arrays of arrays.
 * Library Functions Summary::           Summary of library functions.
-@ifclear FOR_PRINT
 * Library Exercises::                   Exercises.
-@end ifclear
 * Running Examples::                    How to run these examples.
 * Clones::                              Clones of common utilities.
 * Cut Program::                         The @command{cut} utility.
@@ -824,9 +818,7 @@ particular records in a file and perform operations upon them.
 * Signature Program::                   People do amazing things with too much
                                         time on their hands.
 * Programs Summary::                    Summary of programs.
-@ifclear FOR_PRINT
 * Programs Exercises::                  Exercises.
-@end ifclear
 * Nondecimal Data::                     Allowing nondecimal input data.
 * Array Sorting::                       Facilities for controlling array
                                         traversal and sorting arrays.
@@ -948,9 +940,7 @@ particular records in a file and perform operations upon them.
                                         and @code{sleep()}.
 * gawkextlib::                          The @code{gawkextlib} project.
 * Extension summary::                   Extension summary.
-@ifclear FOR_PRINT
 * Extension Exercises::                 Exercises.
-@end ifclear
 * V7/SVR3.1::                           The major changes between V7 and
                                         System V Release 3.1.
 * SVR4::                                Minor changes between System V
@@ -3195,8 +3185,8 @@ features that haven't been covered yet, so don't worry if you don't
 understand all the details:
 
 @example
-LC_ALL=C ls -l | awk '$6 == "Nov" @{ sum += $5 @}
-                      END @{ print sum @}'
+ls -l | awk '$6 == "Nov" @{ sum += $5 @}
+             END @{ print sum @}'
 @end example
 
 @cindex @command{ls} utility
@@ -6128,9 +6118,7 @@ used with it do not have to be named on the @command{awk} command line
 * Command-line directories::    What happens if you put a directory on the
                                 command line.
 * Input Summary::               Input summary.
-@ifclear FOR_PRINT
 * Input Exercises::             Exercises.
-@end ifclear
 @end menu
 
 @node Records
@@ -8676,7 +8664,7 @@ Directories on the command line are fatal for standard @command{awk};
 
 @end itemize
 
-@ifclear FOR_PRINT
+@c EXCLUDE START
 @node Input Exercises
 @section Exercises
 
@@ -8696,7 +8684,7 @@ starts later on the same line.
 Write a program that does handle multiple comments on the line.
 
 @end enumerate
-@end ifclear
+@c EXCLUDE END
 
 @node Printing
 @chapter Printing Output
@@ -8738,9 +8726,7 @@ and discusses the @code{close()} built-in function.
                                 descriptors.
 * Close Files And Pipes::       Closing Input and Output Files and Pipes.
 * Output Summary::              Output summary.
-@ifclear FOR_PRINT
 * Output Exercises::            Exercises.
-@end ifclear
 @end menu
 
 @node Print
@@ -10251,7 +10237,7 @@ communications.
 
 @end itemize
 
-@ifclear FOR_PRINT
+@c EXCLUDE START
 @node Output Exercises
 @section Exercises
 
@@ -10281,7 +10267,7 @@ BEGIN @{ print "Serious error detected!" > /dev/stderr @}
 @end example
 
 @end enumerate
-@end ifclear
+@c EXCLUDE END
 
 @c ENDOFRANGE prnt
 
@@ -20321,9 +20307,7 @@ comparisons use only lowercase letters.
 * Group Functions::             Functions for getting group information.
 * Walking Arrays::              A function to walk arrays of arrays.
 * Library Functions Summary::   Summary of library functions.
-@ifclear FOR_PRINT
 * Library Exercises::           Exercises.
-@end ifclear
 @end menu
 
 @node Library Names
@@ -22740,7 +22724,7 @@ A simple function to traverse an array of arrays to any depth.
 
 @end itemize
 
-@ifclear FOR_PRINT
+@c EXCLUDE START
 @node Library Exercises
 @section Exercises
 
@@ -22807,7 +22791,7 @@ Test your new version by printing the array; you should end up with
 output identical to that of the original version.
 
 @end enumerate
-@end ifclear
+@c EXCLUDE END
 
 @c ENDOFRANGE flib
 @c ENDOFRANGE fudlib
@@ -22852,9 +22836,7 @@ Many of these programs use library functions presented in
 * Clones::                      Clones of common utilities.
 * Miscellaneous Programs::      Some interesting @command{awk} programs.
 * Programs Summary::            Summary of programs.
-@ifclear FOR_PRINT
 * Programs Exercises::          Exercises.
-@end ifclear
 @end menu
 
 @node Running Examples
@@ -26290,7 +26272,7 @@ mailing labels, and finding anagrams.
 
 @end itemize
 
-@ifclear FOR_PRINT
+@c EXCLUDE START
 @node Programs Exercises
 @section Exercises
 
@@ -26420,7 +26402,7 @@ Modify @file{anagram.awk} (@pxref{Anagram Program}), to avoid
 the use of the external @command{sort} utility.
 
 @end enumerate
-@end ifclear
+@c EXCLUDE END
 
 @ifnotinfo
 @part @value{PART3}Moving Beyond Standard @command{awk} With @command{gawk}
@@ -30862,9 +30844,7 @@ When @option{--sandbox} is specified, extensions are disabled
                                 @code{gawk}.
 * gawkextlib::                  The @code{gawkextlib} project.
 * Extension summary::           Extension summary.
-@ifclear FOR_PRINT
 * Extension Exercises::         Exercises.
-@end ifclear
 @end menu
 
 @node Extension Intro
@@ -34801,7 +34781,7 @@ should be the place to do so.
 
 @end itemize
 
-@ifclear FOR_PRINT
+@c EXCLUDE START
 @node Extension Exercises
 @section Exercises
 
@@ -34824,7 +34804,7 @@ Write a wrapper script that provides an interface similar to
 @ref{Extension Sample Inplace}.
 
 @end enumerate
-@end ifclear
+@c EXCLUDE END
 
 @ifnotinfo
 @part @value{PART4}Appendices
diff --git a/doc/gawktexi.in b/doc/gawktexi.in
index 4bf430a7..da427d9b 100644
--- a/doc/gawktexi.in
+++ b/doc/gawktexi.in
@@ -570,9 +570,7 @@ particular records in a file and perform operations upon them.
 * Command-line directories::            What happens if you put a directory on
                                         the command line.
 * Input Summary::                       Input summary.
-@ifclear FOR_PRINT
 * Input Exercises::                     Exercises.
-@end ifclear
 * Print::                               The @code{print} statement.
 * Print Examples::                      Simple examples of @code{print}
                                         statements.
@@ -597,9 +595,7 @@ particular records in a file and perform operations upon them.
 * Close Files And Pipes::               Closing Input and Output Files and
                                         Pipes.
 * Output Summary::                      Output summary.
-@ifclear FOR_PRINT
 * Output Exercises::                    Exercises.
-@end ifclear
 * Values::                              Constants, Variables, and Regular
                                         Expressions.
 * Constants::                           String, numeric and regexp constants.
@@ -786,9 +782,7 @@ particular records in a file and perform operations upon them.
                                         information.
 * Walking Arrays::                      A function to walk arrays of arrays.
 * Library Functions Summary::           Summary of library functions.
-@ifclear FOR_PRINT
 * Library Exercises::                   Exercises.
-@end ifclear
 * Running Examples::                    How to run these examples.
 * Clones::                              Clones of common utilities.
 * Cut Program::                         The @command{cut} utility.
@@ -819,9 +813,7 @@ particular records in a file and perform operations upon them.
 * Signature Program::                   People do amazing things with too much
                                         time on their hands.
 * Programs Summary::                    Summary of programs.
-@ifclear FOR_PRINT
 * Programs Exercises::                  Exercises.
-@end ifclear
 * Nondecimal Data::                     Allowing nondecimal input data.
 * Array Sorting::                       Facilities for controlling array
                                         traversal and sorting arrays.
@@ -943,9 +935,7 @@ particular records in a file and perform operations upon them.
                                         and @code{sleep()}.
 * gawkextlib::                          The @code{gawkextlib} project.
 * Extension summary::                   Extension summary.
-@ifclear FOR_PRINT
 * Extension Exercises::                 Exercises.
-@end ifclear
 * V7/SVR3.1::                           The major changes between V7 and
                                         System V Release 3.1.
 * SVR4::                                Minor changes between System V
@@ -3106,8 +3096,8 @@ features that haven't been covered yet, so don't worry if you don't
 understand all the details:
 
 @example
-LC_ALL=C ls -l | awk '$6 == "Nov" @{ sum += $5 @}
-                      END @{ print sum @}'
+ls -l | awk '$6 == "Nov" @{ sum += $5 @}
+             END @{ print sum @}'
 @end example
 
 @cindex @command{ls} utility
@@ -5912,9 +5902,7 @@ used with it do not have to be named on the @command{awk} command line
 * Command-line directories::    What happens if you put a directory on the
                                 command line.
 * Input Summary::               Input summary.
-@ifclear FOR_PRINT
 * Input Exercises::             Exercises.
-@end ifclear
 @end menu
 
 @node Records
@@ -8278,7 +8266,7 @@ Directories on the command line are fatal for standard @command{awk};
 
 @end itemize
 
-@ifclear FOR_PRINT
+@c EXCLUDE START
 @node Input Exercises
 @section Exercises
 
@@ -8298,7 +8286,7 @@ starts later on the same line.
 Write a program that does handle multiple comments on the line.
 
 @end enumerate
-@end ifclear
+@c EXCLUDE END
 
 @node Printing
 @chapter Printing Output
@@ -8340,9 +8328,7 @@ and discusses the @code{close()} built-in function.
                                 descriptors.
 * Close Files And Pipes::       Closing Input and Output Files and Pipes.
 * Output Summary::              Output summary.
-@ifclear FOR_PRINT
 * Output Exercises::            Exercises.
-@end ifclear
 @end menu
 
 @node Print
@@ -9753,7 +9739,7 @@ communications.
 
 @end itemize
 
-@ifclear FOR_PRINT
+@c EXCLUDE START
 @node Output Exercises
 @section Exercises
 
@@ -9783,7 +9769,7 @@ BEGIN @{ print "Serious error detected!" > /dev/stderr @}
 @end example
 
 @end enumerate
-@end ifclear
+@c EXCLUDE END
 
 @c ENDOFRANGE prnt
 
@@ -19448,9 +19434,7 @@ comparisons use only lowercase letters.
 * Group Functions::             Functions for getting group information.
 * Walking Arrays::              A function to walk arrays of arrays.
 * Library Functions Summary::   Summary of library functions.
-@ifclear FOR_PRINT
 * Library Exercises::           Exercises.
-@end ifclear
 @end menu
 
 @node Library Names
@@ -21838,7 +21822,7 @@ A simple function to traverse an array of arrays to any depth.
 
 @end itemize
 
-@ifclear FOR_PRINT
+@c EXCLUDE START
 @node Library Exercises
 @section Exercises
 
@@ -21905,7 +21889,7 @@ Test your new version by printing the array; you should end up with
 output identical to that of the original version.
 
 @end enumerate
-@end ifclear
+@c EXCLUDE END
 
 @c ENDOFRANGE flib
 @c ENDOFRANGE fudlib
@@ -21950,9 +21934,7 @@ Many of these programs use library functions presented in
 * Clones::                      Clones of common utilities.
 * Miscellaneous Programs::      Some interesting @command{awk} programs.
 * Programs Summary::            Summary of programs.
-@ifclear FOR_PRINT
 * Programs Exercises::          Exercises.
-@end ifclear
 @end menu
 
 @node Running Examples
@@ -25388,7 +25370,7 @@ mailing labels, and finding anagrams.
 
 @end itemize
 
-@ifclear FOR_PRINT
+@c EXCLUDE START
 @node Programs Exercises
 @section Exercises
 
@@ -25518,7 +25500,7 @@ Modify @file{anagram.awk} (@pxref{Anagram Program}), to avoid
 the use of the external @command{sort} utility.
 
 @end enumerate
-@end ifclear
+@c EXCLUDE END
 
 @ifnotinfo
 @part @value{PART3}Moving Beyond Standard @command{awk} With @command{gawk}
@@ -29960,9 +29942,7 @@ When @option{--sandbox} is specified, extensions are disabled
                                 @code{gawk}.
 * gawkextlib::                  The @code{gawkextlib} project.
 * Extension summary::           Extension summary.
-@ifclear FOR_PRINT
 * Extension Exercises::         Exercises.
-@end ifclear
 @end menu
 
 @node Extension Intro
@@ -33899,7 +33879,7 @@ should be the place to do so.
 
 @end itemize
 
-@ifclear FOR_PRINT
+@c EXCLUDE START
 @node Extension Exercises
 @section Exercises
 
@@ -33922,7 +33902,7 @@ Write a wrapper script that provides an interface similar to
 @ref{Extension Sample Inplace}.
 
 @end enumerate
-@end ifclear
+@c EXCLUDE END
 
 @ifnotinfo
 @part @value{PART4}Appendices
diff --git a/regcomp.c b/regcomp.c
index beb74bbf..7ef88dd7 100644
--- a/regcomp.c
+++ b/regcomp.c
@@ -2203,7 +2203,11 @@ parse_reg_exp (re_string_t *regexp, regex_t *preg, re_token_t *token,
 	{
 	  branch = parse_branch (regexp, preg, token, syntax, nest, err);
 	  if (BE (*err != REG_NOERROR && branch == NULL, 0))
-	    return NULL;
+	    {
+	      if (tree != NULL)
+		postorder (tree, free_tree, NULL);
+	      return NULL;
+	    }
 	}
       else
 	branch = NULL;
@@ -2464,8 +2468,7 @@ parse_expression (re_string_t *regexp, regex_t *preg, re_token_t *token,
   while (token->type == OP_DUP_ASTERISK || token->type == OP_DUP_PLUS
 	 || token->type == OP_DUP_QUESTION || token->type == OP_OPEN_DUP_NUM)
     {
-      bin_tree_t *dup_tree = parse_dup_op (tree, regexp, dfa, token,
-					   syntax, err);
+      bin_tree_t *dup_tree = parse_dup_op (tree, regexp, dfa, token, syntax, err);
       if (BE (*err != REG_NOERROR && dup_tree == NULL, 0))
 	{
 	  if (tree != NULL)
@@ -2628,6 +2631,8 @@ parse_dup_op (bin_tree_t *elem, re_string_t *regexp, re_dfa_t *dfa,
 
       /* Duplicate ELEM before it is marked optional.  */
       elem = duplicate_tree (elem, dfa);
+      if (BE (elem == NULL, 0))
+        goto parse_dup_op_espace;
       old_tree = tree;
     }
   else
@@ -3124,8 +3129,8 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
   if (BE (sbcset == NULL, 0))
 #endif /* RE_ENABLE_I18N */
     {
-#ifdef RE_ENABLE_I18N
       re_free (sbcset);
+#ifdef RE_ENABLE_I18N
       re_free (mbcset);
 #endif
       *err = REG_ESPACE;
diff --git a/regex_internal.c b/regex_internal.c
index 056cff3d..9e427081 100644
--- a/regex_internal.c
+++ b/regex_internal.c
@@ -545,7 +545,10 @@ build_upper_buffer (re_string_t *pstr)
       int ch = pstr->raw_mbs[pstr->raw_mbs_idx + char_idx];
       if (BE (pstr->trans != NULL, 0))
 	ch = pstr->trans[ch];
-      pstr->mbs[char_idx] = toupper (ch);
+      if (islower (ch))
+	pstr->mbs[char_idx] = toupper (ch);
+      else
+	pstr->mbs[char_idx] = ch;
     }
   pstr->valid_len = char_idx;
   pstr->valid_raw_len = char_idx;
@@ -683,7 +686,7 @@ re_string_reconstruct (re_string_t *pstr, int idx, int eflags)
 			 pstr->valid_len - offset);
 	      pstr->valid_len -= offset;
 	      pstr->valid_raw_len -= offset;
-#if DEBUG
+#if defined DEBUG && DEBUG
 	      assert (pstr->valid_len > 0);
 #endif
 	    }
@@ -940,7 +943,7 @@ re_string_context_at (const re_string_t *input, int idx, int eflags)
       int wc_idx = idx;
       while(input->wcs[wc_idx] == WEOF)
 	{
-#ifdef DEBUG
+#if defined DEBUG && DEBUG
 	  /* It must not happen.  */
 	  assert (wc_idx >= 0);
 #endif