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Copyright (C) 2010, 2011, 2012, 2013, 2014 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 4.1.0 to 4.1.1
---------------------------
1. The "stat" extension now includes a "devbsize" element which indicates
the units for the "nblocks" element.
2. The extension facility now works on MinGW. Many of the extensions can be
built and used directly.
3. A number of bugs in the pretty-printing / profiling code have been fixed.
4. Sockets and two-way pipes now work under MinGW.
5. The debugger now lists source code correctly under Cygwin.
6. Configuration and building with the Mac OS X libreadline should work now.
7. The -O option now works again.
8. The --include option, documented since 4.0, now actually works.
9. Infrastructure updated to automake 1.13.4, bison 3.0.2, and
libtool 2.4.2.418.
10. The configure script now accepts a --disable-extensions option,
which disables checking for and building the extensions.
11. The VMS port has been considerably improved. In particular config.h
is now generated by a DCL script. Also, the extension facility works
and several of the extensions can be built and used. Currently, the
extension facility only works on Alpha and Itanium.
12. The API now provides functions pointers for malloc(), calloc(),
realloc() and free(), to insure that the same memory allocation
functions are always used. This bumps the minor version by one.
13. The printf quote flag now works correctly in locales with a different
decimal point character but without a thousands separator character.
If the thousands separator is a string, it will be correctly added
to decimal numbers.
14. The readfile extension now has an input parser that will read whole
files as a single record.
15. A number of bugs have been fixed. See the ChangeLog.
Changes from 4.0.2 to 4.1.0
---------------------------
1. The three executables gawk, pgawk, and dgawk, have been merged into
one, named just gawk. As a result:
* The -R option is gone
* Use -D to run the debugger. An optional file argument is a
list of commands to run first.
* Use -o to do pretty-printing only.
* Use -p to do profiling.
This considerably reduces gawk's "footprint" and eases the documentation
burden as well.
2. Gawk now supports high precision arithmetic with MPFR. The default is
still double precision, but setting PREC changes things, or using
the -M / --bignum options. This support is not compiled in if the MPFR
library is not available.
3. The new -i option (from xgawk) is used for loading awk library files.
This differs from -f in that the first non-option argument is treated
as a script.
4. The new -l option (from xgawk) is used for loading dynamic extensions.
5. The dynamic extension interface has been completely redone! There is
now a defined API for C extensions to use. A C extension acts like
a function written in awk, except that it cannot do everything that awk
code can. However, this allows interfacing to any facility that is
available from C. This is a major development, see the doc, which has
a nice shiny new chapter describing everything.
This support is not compiled in if dynamic loading of shared libraries
is not supported.
The old extension mechanism is still supported for compatiblity, but
it will most definitely be removed at the next major release.
6. The "inplace" extension, built using the new facility, can be used to
simulate the GNU "sed -i" feature.
7. The and(), or() and xor() functions now take any number of arguments,
with a minimum of two.
8. New arrays: SYMTAB, FUNCTAB, and PROCINFO["identifiers"]. SYMTAB allows
indirect access to any defined variable or array; it is possible to
"walk" the symbol table, if that should be necessary.
9. Support for building gawk with a cross compiler has been improved.
10. Infrastructure upgrades: bison 2.7.1, gettext 0.18.2.1, automake 1.13.1,
libtool 2.4.2 for the extensions.
Changes from 4.0.1 to 4.0.2
---------------------------
1. Infrastructure upgrades: Autoconf 2.69, Automake 1.12.6, bison 2.7.
2. `fflush()', `nextfile', and `delete array' are all now part of POSIX.
3. fflush() behavior changed to match BWK awk and for POSIX - now both
fflush() and fflush("") flush all open output redirections.
4. Various minor bug fixes and documentation updates.
Changes from 4.0.0 to 4.0.1
---------------------------
1. The default handling of backslash in sub() and gsub() has been reverted to
the behavior of 3.1. It was silly to think I could break compatibility that
way, even for standards compliance.
2. Completed the implementation of Rational Range Interpretation.
3. Failure to get the group set is no longer a fatal error.
4. Lots of minor bugs fixed and portability clean-ups along the way. See
the ChangeLog for details.
Changes from 3.1.8 to 4.0.0
---------------------------
1. The special files /dev/pid, /dev/ppid, /dev/pgrpid and /dev/user are
now completely gone. Use PROCINFO instead.
2. The POSIX 2008 behavior for `sub' and `gsub' are now the default.
THIS CHANGES BEHAVIOR!!!!
3. The \s and \S escape sequences are now recognized in regular expressions.
4. The split() function accepts an optional fourth argument which is an array
to hold the values of the separators.
5. The new -b / --characters-as-bytes option means "hands off my data"; gawk
won't try to treat input as a multibyte string.
6. There is a new --sandbox option; see the doc.
7. Indirect function calls are now available.
8. Interval expressions are now part of default regular expressions for
GNU Awk syntax.
9. --gen-po is now correctly named --gen-pot.
10. switch / case is now enabled by default. There's no longer a need
for a configure-time option.
11. Gawk now supports BEGINFILE and ENDFILE. See the doc for details.
12. Directories named on the command line now produce a warning, not
a fatal error, unless --posix or --traditional.
13. The new FPAT variable allows you to specify a regexp that matches
the fields, instead of matching the field separator. The new patsplit()
function gives the same capability for splitting.
14. All long options now have short options, for use in `#!' scripts.
15. Support for IPv6 is added via the /inet6/... special file. /inet4/...
forces IPv4 and /inet chooses the system default (probably IPv4).
16. Added a warning for /[:space:]/ that should be /[[:space:]]/.
17. Merged with John Haque's byte code internals. Adds dgawk debugger and
possibly improved performance.
18. `break' and `continue' are no longer valid outside a loop, even with
--traditional.
19. POSIX character classes work with --traditional (BWK awk supports them).
20. Nuked redundant --compat, --copyleft, and --usage long options.
21. Arrays of arrays added. See the doc.
22. Per the GNU Coding Standards, dynamic extensions must now define
a global symbol indicating that they are GPL-compatible. See
the documentation and example extensions.
THIS CHANGES BEHAVIOR!!!!
23. In POSIX mode, string comparisons use strcoll/wcscoll.
THIS CHANGES BEHAVIOR!!!!
24. The option for raw sockets was removed, since it was never implemented.
25. Gawk now treats ranges of the form [d-h] as if they were in the C
locale, no matter what kind of regexp is being used, and even if
--posix. The latest POSIX standard allows this, and the documentation
has been updated. Maybe this will stop all the questions about
[a-z] matching uppercase letters.
THIS CHANGES BEHAVIOR!!!!
26. PROCINFO["strftime"] now holds the default format for strftime().
27. Updated to latest infrastructure: Autoconf 2.68, Automake 1.11.1,
Gettext 0.18.1, Bison 2.5.
28. Many code cleanups. Removed code for many old, unsupported systems:
- Atari
- Amiga
- BeOS
- Cray
- MIPS RiscOS
- MS-DOS with Microsoft Compiler
- MS-Windows with Microsoft Compiler
- NeXT
- SunOS 3.x, Sun 386 (Road Runner)
- Tandem (non-POSIX)
- Prestandard VAX C compiler for VAX/VMS
- Probably others that I've forgotten
29. If PROCINFO["sorted_in"] exists, for(iggy in foo) loops sort the
indices before looping over them. The value of this element
provides control over how the indices are sorted before the loop
traversal starts. See the manual.
30. A new isarray() function exists to distinguish if an item is an array
or not, to make it possible to traverse multidimensional arrays.
31. asort() and asorti() take a third argument specifying how to sort.
See the doc.
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