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author | Eric Blake <ebb9@byu.net> | 2007-02-28 21:31:12 +0000 |
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committer | Eric Blake <ebb9@byu.net> | 2007-10-06 07:08:10 -0600 |
commit | 37cb2a3e79c237941583ef92d7ffe834c31967b2 (patch) | |
tree | 3125d0f2bddd2bd9b8c50a994b8cb7b489bfc8ea /NEWS | |
parent | 083f98f05fadf5b6256b7facb37a120955f58c00 (diff) | |
download | m4-37cb2a3e79c237941583ef92d7ffe834c31967b2.tar.gz |
POSIX XCU ERN 137 was approved.
* modules/mpeval.c (numb_extension): Delete.
* modules/m4.c (numb_extension): Likewise.
* modules/evalparse.c (comma_term, condition_term): Always
implement ?: and , operators.
* m4/symtab.c: Update comment to match reality.
* src/freeze.c (produce_frozen_state, reload_frozen_state): Avoid
dereferencing context directly when accessor exists.
* src/main.c (usage): Prefer GNU_M4 over EMACS.
(struct macro_definition): Rename...
(struct deferred): ...to match usage. All uses changed.
* doc/m4.texinfo (Eval): Document this change.
(Operation modes, Changeresyntax): Fix wording to prefer GNU_M4
over emacs.
(Preprocessor features, Changesyntax): Fix inaccuracies.
* NEWS: Import branch NEWS items for 1.4.x series. Document
change in eval.
Diffstat (limited to 'NEWS')
-rw-r--r-- | NEWS | 352 |
1 files changed, 330 insertions, 22 deletions
@@ -103,12 +103,12 @@ promoted to 2.0. regular expression flavor, to match `-r'/`--regexp-syntax' command-line option. -*** New `debuglen' builtin is introduced which allows runtime setting of - debug output length, previously controlled only by the `-l' command - line argument. Additionally, whether using the new macro or the - command line argument, the length limitation now affects dumpdef output - as well as trace output, undergoes argument validation, and accepts an - optional multiplier suffix. +*** New `debuglen' builtin allows runtime setting of debug output length, + previously controlled only by the `-l' command line argument. + Additionally, whether using the new macro or the command line argument, + the length limitation now affects dumpdef output as well as trace + output, undergoes argument validation, and accepts an optional + multiplier suffix. - FIXME the multiplier suffix isn't reliable yet *** New `mkdtemp' builtin parallels `mkstemp', but allows the creation of @@ -162,8 +162,7 @@ promoted to 2.0. macro. *** The `eval' and `mpeval' builtins now support the following new - operators: `>>>', `\', `?:', and `,'. However, when complying - strictly with POSIX, `?:' and `,' are rejected inside `eval'. + operators: `>>>', `\', `?:', and `,'. *** The `maketemp' builtin now always warns that it is obsolete, even in GNU mode where it uses the same secure algorithm as `mkstemp', because of @@ -192,13 +191,329 @@ promoted to 2.0. - FIXME: format 2 still needs to catch more missing state; once 2.0 is released, any further changes would introduce format 3. -FIXME: include the (long) list of changes in 1.4.x that were not already - in earlier betas. -* Version 1.4.9 -* Version 1.4.8 -* Version 1.4.7 -* Version 1.4.6 -* Version 1.4.5 +*** Improvements made in the 1.4.x stable series have been incorporated. + +* Version 1.4.9 - ?? ??? 2007, by ??? (CVS version 1.4.8c) + +** Minor documentation and portability cleanups. + +* Version 1.4.8b - 24 Feb 2007, by Eric Blake (CVS version 1.4.8a) + +** Fix a regression introduced in 1.4.8 that made m4 unable to process + files larger than 2GiB on some platforms. + +** Fix a regression introduced in 1.4.8 that made m4 dump core when + invoked as 'm4 -- file'. + +** The `eval' builtin now follows C precedence rules. Additionally, the + short-circuit operators correctly short-circuit division by zero. The + previously undocumented alias of '=' meaning '==' in eval now triggers a + deprecation warning, so that a future version of M4 can implement a form + of variable assignment as an extension. + +** The `include' builtin now affects exit status on failure, as required by + POSIX. Use `sinclude' if you need a successful exit status. + +** The `-E'/`--fatal-warnings' command-line option now has two levels. When + specified only once, warnings affect exit status, but execution + continues, so that you can see all warnings instead of fixing them one + at a time. To acheive 1.4.8 behavior, where the first warning + immediately exits, specify -E twice on the command line. + +** A new `--warn-macro-sequence' command-line option allows detection of + sequences in `define' and `pushdef' definitions that match an optional + regular expression. The default regular expression is + `\$\({[^}]*}\|[0-9][0-9]+\)', corresponding to the sequences that might + not behave correctly when upgrading to the eventual M4 2.0. By default, + M4 2.0 will follow the POSIX requirement that a macro definition + containing `$11' must expand to the first argument concatenated with 1, + rather than the eleventh argument; and will take advantage of the POSIX + wording that allows implementations to treat `${11}' as the eleventh + argument instead of literal text. Be aware that Autoconf 2.61 will not + work with this option enabled with the default regular expression; but + Autoconf 2.62 will be compatible with this option. + +** Improved portability to platforms such as BSD/OS and AIX. + +* Version 1.4.8 - 20 November 2006, by Eric Blake (CVS version 1.4.7a) + +** The `divert' macro and `-H'/`--hashsize' command line option no longer + cause a core dump when handed extra large values. Also, `divert' now + uses memory proportional to the number of diversions in use, rather than + to the maximum diversion number encountered, so that large diversion + numbers are less likely to exhaust system memory; and is no longer + limited by the maximum number of file descriptors. + +** The `--help' and `--version' command line options now consistently + override all earlier options. For example, `m4 --debugfile=trace + --help' now no longer accidentally creates an empty file `trace'. + +** The `-L'/`--nesting-limit' command line option can now be set to 0 + to remove the default limit of 1024. However, it is still possible that + heavily nested input can cause abrupt program termination due to stack + overflow. + +** Problems encountered when writing to standard error, such as with the + `errprint' macro, now always cause a non-zero exit status. + +** Warnings and errors issued during macro expansion are now consistently + reported at the line where the macro name was detected, rather than + where the close parenthesis resides. Text wrapped by `m4wrap' now + remembers the location that was in effect when m4wrap was invoked, + rather than changing to line 0 and the empty string for a file. The + macros `__line__' and `__file__' now work correctly even as the last + token in an included file. + +** The `builtin' and `indir' macros now transparently handle builtin + tokens generated by `defn'. + +** When diversions created by the `divert' macro collect enough text that + M4 must use temporary files, the environment variable $TMPDIR is now + consulted, and a better effort is made to clean up those files in the + event of a fatal signal. + +** The `mkstemp' builtin is added with the same GNU semantics as `maketemp', + based on the recommendation of POSIX to deprecate the POSIX semantics of + `maketemp' as inherently insecure. In GNU mode (no -G supplied on the + command line), `maketemp' silently retains the secure GNU semantics, but + a future release of M4 will change this to emit a warning. In + traditional mode (m4 -G), `maketemp' now uses the POSIX-mandated + insecure semantics, and issues a warning that you should convert your + script to use `mkstemp' instead. Additionally, `mkstemp' and `maketemp' + are now well-defined even if the template argument does not end in six + `X' characters. + +** The manual has been improved, including a new section on a composite + macro `foreach'. + +** The `changecom' and `changequote' macros now treat an empty second + argument the same as if it were missing, rather than using the empty + string and making it impossible to end a comment or quote. + +** The `translit' macro now operates in linear instead of quadratic time, + and is now eight-bit clean. + +** The `-D', `-U', `-s', and `-t' command line options now take effect + after any files encountered earlier on the command line, rather than up + front, as is done in traditional implementations and required by POSIX. + +* Version 1.4.7 - 25 September 2006, by Eric Blake (CVS version 1.4.6a) + +** Fix regression from 1.4.5 in handling a file that ends in a macro + expansion without arguments instead of a newline. + +** The define and pushdef macros now warn when the first argument is not + a string, rather than silently doing nothing. + +** Standard input can now be read more than once, as in 'm4 - file -', and + is not closed until all wrapped text is handled. This makes a + difference when stdin is not a regular file, and also fixes bugs when + using the syscmd or esyscmd macros from wrapped text. + +** When standard input is a seekable file, the m4exit, syscmd, and esyscmd + macros now restore the current position to the next unread byte rather + than discarding an arbitrary amount of buffered data. + +** SysV command-line compatibility is no longer a goal of GNU M4; the + focus will be instead on POSIX compatibility. This release continues to + support previous usage, but adds warnings in areas which will allow a + future version of GNU M4 to use its own extensions without being tied to + the SysV command line interface. + +** The no-op compatibility command line options -B, -N, -S, -T, and + --diversions may be withdrawn or assigned new meanings in future + releases, so they now issue a warning if used. + +** A new command line option -i replaces the compatibility -e as the + short spelling of --interactive, for consistency with other GNU tools; a + warning is issued if the old spelling is used, and it may be assigned + new meaning in future releases. + +** A new command line option --debugfile replaces the options -o and + --error-output as the preferred spelling. The old options were + misleading in their names and inconsistent with other GNU tools; they + are still silently accepted, but no longer documented in --help, and may + be assigned new meanings in future releases. + +* Version 1.4.6 - 25 August 2006, by Eric Blake (CVS version 1.4.5a) + +** Fix buffer overruns in regexp and patsubst macros when handed a trailing + backslash in the replacement text, or when handling \n substitutions + beyond the number of \(\) groups. + +** Fix memory leak in regexp, patsubst, and changeword macros. + +** The format macro now understands %F, %g, and %G. + +** When loading frozen files, m4 now exits with status 63 if version + mismatch is detected. + +** Fix bugs that occurred when invoked with stdout or stderr closed, + and detect write failures to stdout or to the target of the debugfile + macro. In particular, the syscmd and esyscmd macros can no longer + interfere with the debug stream or diversions. + +** The m4exit macro now converts values outside the range 0-255 to 1. + +** It is now an error if a command-line input file ends in the middle of a + comment, matching the behavior of mid-string and mid-argument + collection. + +** The dnl macro now warns if end of file is encountered instead of a + newline. + +** The error message when end of file is encountered now uses the file and + line where the dangling construct started, rather than `NONE:0:'. + +** The debugmode and __file__ macros, and the -s/--synclines option, now + show what directory a file was found in when the -I/--include option or + M4PATH variable had an effect. + +** The changequote and changecom macros now work with 8-bit characters, and + quotes and comments that begin with `(' are properly recognized + following a word. + +** The new macro __program__ is added, which allows the input file to issue + an error message that resembles messages from m4. Warning and error + messages have been reformatted to comply with GNU Coding Standards. + +** The errprint, m4wrap, and shift macros are now recognized only with + arguments. + +** The index, substr, translit, regexp, and patsubst macros now produce + output when given only one argument, but still warn about a missing + second argument. + +** The patsubst macro now reliably finds zero-length matches at the end + of a string. + +* Version 1.4.5 - 15 July 2006, by Eric Blake (CVS version 1.4.4c) + +** Fix sysval on BeOS, OS/2, and other systems that store exit status + in the low-order byte. Additionally, on Unix platforms, if syscmd was + terminated by a signal, sysval now displays the signal number shifted + left by eight bits, to match traditional m4 implementations. + +** The maketemp macro is no longer subject to platform limitations (such as + 26 or 32 max files from a given template). + +** Frozen files now require that the first directive be V (version), to + better diagnose version mismatch. Additionally, if the F directive + (builtin function) names an unknown builtin that existed in the m4 that + froze the file but not in the current m4 (for example, changeword), the + warning is deferred until an attempt is made to actually use the + builtin. This allows downgrading from beta m4-1.4o to stable m4-1.4.5 + without breaking autoconf. + +** The format and indir macros are now recognized only with arguments. + +** The eval macro no longer crashes on x86 architectures when dividing the + minimum integer by -1. + +** On systems with ecvt and fcvt, format no longer truncates trailing + zeroes on integers printed with %.0f. On systems without these + functions, format is no longer subject to a buffer overflow that + permitted arbitrary code execution. + +** On native Windows builds, the macro __windows__ is provided instead of + __unix__. Likewise, on OS/2 builds, the macro __os2__ is provided. + This allows input files to determine when syscmd might behave + differently. + +** Fix bug in 1.4.3 patch to use \n line-endings that did not work for + cygwin. + +** When given the empty string or 0, undivert is now documented as a no-op + rather than closing stdout, warning about a non-existent file, or trying + to read a directory as a file. + +** Many documentation improvements. Also, the manual is now distributed + under FDL 1.2, rather than a stricter verbatim-only license. + +** Raise the -L (--nesting-limit) command line option limit from 250 to + 1024. + +** The decr, incr, divert, m4exit, and substr macros treat an empty number + as 0, issue a warning, and expand as normal; rather than issuing an + error and expanding to the empty string. + +** The eval macro now treats an empty radix argument as 10, handles radix 1, + and treats the width argument as number of digits excluding the sign, + for compatibility with other m4 implementations. + +** The ifdef, divert, m4exit, substr, and translit macros now correctly + ignore extra arguments. + +** The popdef and undefine macros now correctly accept multiple arguments. + +** Although changeword is on its last leg, if enabled, it now reverts to the + default (faster) regexp when passed the empty string. + +** The regexp and substr macros now warn and ignore a trailing backslash in + the replacement, and warn on \n for n larger than the number of + sub-expressions in the regexp. + +* Version 1.4.4b - 17 June 2006, by Eric Blake (CVS version 1.4.4a) + +** Fix a recursive push_string crashing bug, which affected changequote of + three or more characters on some compilers. + +** Use automake to fix build portability issues. + +** Fix a recursive m4wrap crashing bug. + +** Fix a 1 in 2**32 hash crashing bug. + +** Tracing a macro by name is now persistent, even if the macro is + subsequently undefined or redefined. The traceon and traceoff macros no + longer warn about undefined symbols. This solves a crash when using + indir on an undefined macro traced with the -t option, as well as an + incorrect result of ifdef. Furthermore, tracing is no longer + transferred with builtins, solving the bug of "m4 -tm4_eval" failing to + give trace output on the input + "define(`m4_eval',defn(`eval'))m4_eval(1)". + +** Fix a crash when a macro is undefined while collecting its arguments, by + always using the definition that was in effect before argument + collection. This behavior matches the C pre-processor, and means that + the sequence "define(`f',`1')f(define(`f',`2'))f" is now documented to + result in "12", rather than the previously undocumented "22". + +** Update the regex engine to fix several bugs. + +** Fix a potential crash on machines where char is signed. + +* Version 1.4.4 - October 2005, by Gary V. Vaughan + +** ./configure --infodir=/usr/share/info now works correctly. + +** When any file named on the command line is missing exit with status 1. + +* Version 1.4.3 - March 2005, by Gary V. Vaughan + +** DESTDIR installs now work correctly. + +** Don't segfault with uncompilable regexps to changeword(). + +** Always use \n line-endings for frozen files (fixes a Windows bug). + +** Portability fix for systems lacking mkstemp(3). + +** Approximately 20% speed up in the common case of usage with autoconf. + +** Supported on QNX 6.3. + +* Version 1.4.2 - August 2004, by Paul Eggert + +** No user visible changes; portability bug fixes only. + +* Version 1.4.1 - June 2004, by Paul Eggert + +** The 1.4.x series is intended to be stable; features added in 1.4[a-q] + were not backported to 1.4.x unless specifically mentioned above. + +** maketemp now creates an empty file with the given name, instead of merely + returning the name of a nonexistent file. This closes a security hole. * Version beta 1.4q - August 2001, by Gary V. Vaughan @@ -355,13 +670,6 @@ FIXME: include the (long) list of changes in 1.4.x that were not already *** All 8-bit characters can now be used for quotes. -FIXME: include the (long) list of changes in 1.4.x that were not already - in earlier betas. -* Version 1.4.4 -* Version 1.4.3 -* Version 1.4.2 -* Version 1.4.1 - * Version 1.4 - October 1994, by Franc,ois Pinard ** (No user visible changes) |