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- GNU m4 NEWS - User visible changes.
- Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
-
- Version 1.4 - October 1994, by Franc,ois Pinard
-
- (No user visible changes)
-
- Version 1.3 - September 1994, by Franc,ois Pinard
-
- * Diversions are created as needed. Option `-N' is still accepted, but
- otherwise ignored. Users should use only negative diversion numbers,
- instead of high positive numbers, for diverting to nowhere.
-
- * Diversions should also work faster. No temporary files will be needed
- at all if all diversions taken altogether do not use more than 512K.
-
- * Frozen state files may be produced with the `--freeze-state' (-F)
- option and later brought back through the `--reload-state' (-R) option.
-
- Version 1.2 - July 1994, by Franc,ois Pinard
-
- * In patsubst(STRING, REGEXP, REPLACEMENT), \& in REPLACEMENT has been
- changed to represent this part of STRING matched by the whole REGEXP,
- instead of the whole STRING as before. \0 does the same, but emits a
- diagnostic saying it will disappear in some subsequent release.
-
- * eval(EXPR) emits a diagnostic if EXPR has suffixed crumb. The same for
- other numeric conversions in incr(), decr(), divert(), etc.
-
- * `--fatal-warnings' (-E) stops execution at first warning.
-
- * `--nesting-limit=LEVEL' (-L LEVEL) sets a limit to macro nesting.
- It is initially fixed at 250.
-
- * `--word-regexp=REGEXP' (-W REGEXP) modifies macro name syntax, like
- does the new `changeword(REGEXP)' macro. This feature is experimental,
- tell me your opinions about it. You do need --enable-changeword at
- configure time to get these things. Do *not* depend on them yet.
-
- * Trace output format is scannable by GNU Emacs' next-error function.
-
- * Stack overflow is detected and diagnosed on some capable systems.
-
- * Various bugs have been corrected, m4 should be more portable. See the
- ChangeLog for details.
-
- Version 1.1 - November 1993, by Franc,ois Pinard
-
- Changes which might affect existing GNU m4 scripts:
-
- * Option `-V' has been removed, use `--version' instead. `--version'
- writes on standard output instead of standard error, and inhibits any
- script execution.
-
- * `--no-gnu-extensions' has been renamed `--traditional'.
-
- * In `eval', `^' used to indicate exponentiation, use `**' instead.
-
- * The automatic undiversion which takes place at end of all input is
- forced into the main output stream.
-
- Changes which are unlikely to affect existing scripts:
-
- * `--help' prints an usage summary on standard output. Script execution
- is then inhibited.
-
- * `--prefix-builtins' (-P) prefixes all builtin macros by `m4_'.
-
- * Most builtin macros for which arguments are mandatory, called without
- any arguments, are no more recognized as builtin macros: they are
- consequently copied verbatim to the output stream.
-
- * `define' and `pushdef' are usable with only one argument, they give
- this argument an empty definition.
-
- * `eval' new operators for binary representation handling: `^' for
- exclusive-or, `~' for the bitwise negation, `<<' and `>>' for shifts.
-
- * `eval' recognizes the notation 0bDIGITS for binary numbers and the
- notation 0rRADIX:DIGITS for numbers in any radix from 1 to 36.
-
- Version 1.0.3 - December 1992, by Franc,ois Pinard
-
- Changes for the user:
-
- * `dnl' outputs a diagnostic if immediately followed by `('. Usually,
- `dnl' is followed by newline or whitespace.
-
- * `ifelse' accepts without complaining the common idiom of having only
- one argument. This is useful for introducing long comments.
-
- * `eval' always expresses values as signed, whatever the radix.
-
- * M4OPTS environment variable is no longer obeyed.
-
- * `--no-warnings' option is renamed `--silent'.
-
- * Debug lines use a new format more compatible with GNU standards.
-
- * Various bugs have been corrected. See the ChangeLog for details.
-
- Changes for the installer:
-
- * GNU m4 now uses an Autoconf-generated configure script, and should be
- more easily portable in many ways. (Cray is not supported yet).
-
- * `make check' has been made more portable, expect no errors.
-
- Changes for the programmer:
-
- * Sources have been fully reindented to comply with GNU standards, and
- cleaned up in many ways.
-
- * Sources have been protoized. Non-ANSI compilers are automatically
- detected, then sources are unprotoized on the fly before compilation.
-
- * GNU m4 uses newer versions of obstack, regex, getopt, etc.
-
- Version 1.0 - October 1991, by Rene' Seindal
-
- * Uses GNU configure, taken from the gdb distribution.
-
- * Uses GNU getopt(), with long option names.
-
- * The -Q/+quiet option is added, which suppresses warnings about missing
- or superflous arguments to built-in macros.
-
- * Added default options via the M4OPTS environment variable.
-
- * Several minor bugs have been fixed.
-
- Version 0.99 - July 1991, by Rene' Seindal
-
- * The builtins `incr' and `decr' are now implemented without use of
- `eval'.
-
- * The builtin `indir' is added, to allow for indirect macro calls
- (allows use of "illegal" macro names).
-
- * The debugging and tracing facilities has been enhanced considerably.
- See the manual for details.
-
- * The -tMACRO option is added, marks MACRO for tracing as soon as it
- is defined.
-
- * Builtins are traced after renaming iff they were before.
-
- * Named files can now be undiverted.
-
- * The -Nnum option can be used to increase the number of divertions
- available.
-
- * Calling changecom without arguments now disables all comment handling.
-
- * A bug in `dnl' is fixed.
-
- * A bug in the multi-character quoting code is fixed.
-
- * Several typos in the manual has been corrected. More probably persist.
-
- Version 0.75 - November 1990, by Rene' Seindal
-
- * Implemented search path for include files (-I option and M4PATH
- environment variable).
-
- * Implemented builtin `format' for printf-like formatting.
-
- * Implemented builtin `regexp' for searching for regular expressions.
-
- * Implemented builtin `patsubst' for substitution with regular
- expressions.
-
- * Implemented builtin `esyscmd', which expands to a shell commands output.
-
- * Implemented `__file__' and `__line__' for use in error messages.
-
- * Implemented character ranges in `translit'.
-
- * Implemented control over debugging output.
-
- * Implemented multi-character quotes.
-
- * Implemented multi-character comment delimiters.
-
- * Changed predefined macro `gnu' to `__gnu__'.
-
- * Changed predefined macro `unix' to `__unix__', when the -G option is
- not used. With -G, `unix' is still defined.
-
- * Added program name to error messages.
-
- * Fixed two missing null bytes bugs.
-
- Version 0.50 - January 1990, by Rene' Seindal
-
- * Initial beta release.
-
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