Copyright (C) 2019, 2020, 2021, 2022 Free Software Foundation, Inc. Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved. Changes from 5.1.x to 5.2.0 --------------------------- 1. Numeric scalars now compare in the same way as C for the relational operators. Comparison order for sorting has not changed. This only makes a difference when comparing Infinity and NaN values with regular numbers; it should not be noticeable most of the time. 2. If the AWK_HASH environment variable is set to "fnv1a" gawk will use the FNV1-A hash function for associative arrays. 3. The CMake infrastructure has been removed. In the five years it was in the tree, nobody used it, and it was not updated. 4. There is now a new function, mkbool(), that creates Boolean-typed values. These values *are* numbers, but they are also tagged as Boolean. This is mainly for use with data exchange to/from languages or environments that support real Boolean values. See the manual for details. 5. As BWK awk has supported interval expressions since 2019, they are now enabled even if --traditional is supplied. The -r/--re-interval option remains, but it does nothing. 6. The rwarray extension has two new functions, writeall() and readall(), for saving / restoring all of gawk's variables and arrays. 7. The new `gawkbug' script should be used for reporting bugs. 8. The manual page (doc/gawk.1) has been considerably reduced in size. Wherever possible, details were replaced with references to the online copy of the manual. Changes from 5.1.1 to 5.1.2 --------------------------- 1. Infrastructure upgrades: Automake 1.16.5, Texinfo 6.8. 2. The rwarray extension now supports writing and reading GMP and MPFR values. As a result, a bug in the API code was fixed. Changes from 5.1.0 to 5.1.1 --------------------------- 1. Infrastructure upgrades: Bison 3.8, Gettext 0.20.2, Automake 1.16.4, and (will wonders never cease) Autoconf 2.71. 2. asort and asorti now allow FUNCTAB and SYMTAB as the first argument if a second destination array is supplied. Similarly, using either array as the second argument is now a fatal error. Additionally, using either array as the destination for split(), match(), etc. also causes a fatal error. 3. The new -I/--trace option prints a trace of the byte codes as they are executed. 4. A number of subtle bugs relating to MPFR mode that caused differences between regular operation and MPFR mode have been fixed. 5. The API now handles MPFR/GMP values slightly differently, requiring different memory management for those values. See the manual for the details if you have an extension using those values. As a result, the minor version was incremented. 6. $0 and the fields are now cleared before starting a BEGINFILE rule. 7. The duplication of m4 and build-aux directories between the main directory and the extension directory has been removed. This simplifies the distribution. 8. The test suite has been improved, making it easier to run the entire suite with -M. Use `GAWK_TEST_ARGS=-M make check' to do so. 9. Profiling and pretty-printing output has been modified slightly so that functions are presented in a reasonable order with respect to the namespaces that contain them. 10. Several example programs in the manual have been updated to their modern POSIX equivalents. 11. A number of examples in doc/gawkinet.texi have been updated for current times. Thanks to Juergen Kahrs for the work. 12. Handling of Infinity and NaN values has been improved. 13. There has been a general tightening up of the use of const and of types. 14. The "no effect" lint warnings have been fixed up and now behave more sanely. 15. The manual has been updated with much more information about what is and is not a bug, and the changes in the gawk mailing lists. 16. The behavior of strongly-typed regexp constants when passed as the third argument to sub() or gsub() has been clarified in the code and in the manual. 17. Similar to item #4 above, division by zero is now fatal in MPFR mode, as it is in regular mode. 18. There have been numerous minor code cleanups and bug fixes. See the ChangeLog for details. Changes from 5.0.1 to 5.1.0 --------------------------- 1. The major version of the API is bumped to 3, something that should have happened at the 5.0.0 release but didn't. 2. A number of memory leak issues have been fixed. 3. Infrastructure upgrades: Bison 3.5.4, Texinfo 6.7, Gettext 0.20.1, Automake 1.16.2. 4. The indexing in the manual has been thoroughly revised, in particular making use of the facilities in Texinfo 6.7. That version (or newer) must be used to format the manual. 5. MSYS2 is now supported out-of-the-box by configure. 6. Several bugs have been fixed. See the ChangeLog for details. Changes from 5.0.0 to 5.0.1 --------------------------- 1. A number of ChangeLog.1 files that were left out of the distribution have been restored. 2. Multiple syntax errors should no longer be able to cause a core dump. 3. Sandbox mode now disallows assigning new filename values in ARGV that were not there when gawk was invoked. 4. There are many small documentation improvements in the manual. 5. The new argument "no-ext" to --lint disables ``XXX is a gawk extension'' lint warnings. 6. Infrastructure upgrades: Bison 3.4. 7. A number of bugs, some of them quite significant, have been fixed. See the ChangeLog for details. Changes from 4.2.1 to 5.0.0 --------------------------- 1. Support for the POSIX standard %a and %A printf formats has been added. 2. The test infrastructure has been greatly improved, simplifying the contents of test/Makefile.am and making it possible to generate pc/Makefile.tst from test/Makefile.in. 3. The regex routines have been replaced with those from GNULIB, allowing me to stop carrying forward decades of changes against the original ones from GLIBC. 4. Infrastructure upgrades: Bison 3.3, Automake 1.16.1, Gettext 0.19.8.1, makeinfo 6.5. 5. The undocumented configure option and code that enabled the use of non-English "letters" in identifiers is now gone. 6. The `--with-whiny-user-strftime' configuration option is now gone. 7. The code now makes some stronger assumptions about a C99 environment. 8. PROCINFO["platform"] yields a string indicating the platform for which gawk was compiled. 9. Writing to elements of SYMTAB that are not variable names now causes a fatal error. THIS CHANGES BEHAVIOR. 10. Comment handling in the pretty-printer has been reworked almost completely from scratch. As a result, comments in many corner cases that were previously lost are now included in the formatted output. 11. Namespaces have been implemented! See the manual. One consequence of this is that files included with -i, read with -f, and command line program segments must all be self-contained syntactic units. E.g., you can no longer do something like this: gawk -e 'BEGIN {' -e 'print "hello" }' 12. Gawk now uses the locale settings for ignoring case in single byte locales, instead of hardwiring in Latin-1. 13. A number of bugs, some of them quite significant, have been fixed. See the ChangeLog for details.