[SCM] GNU M4 source repository branch, master, updated. cvs-readonly-170-gc6628fa

[Eric Blake]

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- Log -----------------------------------------------------------------
commit c6628fa51d6c7756f38d1dfaa2055656446ee93a
Author: Eric Blake <address@hidden>
Date:   Fri Nov 28 08:01:59 2008 -0700

    Resync NEWS with branches.
    
    * NEWS: Mention 1.4.12, update state of 1.6.
    
    Signed-off-by: Eric Blake <address@hidden>

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog |    8 +++++++-
 NEWS      |   58 ++++++++++++++++++++++++++++++++++++++++++++++++----------
 2 files changed, 55 insertions(+), 11 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index bed3040..b350524 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2008-11-28  Eric Blake  <address@hidden>
+
+       Resync NEWS with branches.
+       * NEWS: Mention 1.4.12, update state of 1.6.
+
 2008-11-26  Eric Blake  <address@hidden>
 
        Keep COPYING in repository.
@@ -2555,7 +2560,8 @@
        regression.  Also check out-of-range version.
        * tests/builtins.at (divert): Expand test to check corner cases
        of extension.
-       * NEWS: Document the extension.
+       * doc/m4.texinfo (Divert): Document the extension.
+       * NEWS: Likewise.
        Reported by Daniel Richard G.
 
 2007-05-30  Eric Blake  <address@hidden>
diff --git a/NEWS b/NEWS
index 4420c83..1332647 100644
--- a/NEWS
+++ b/NEWS
@@ -157,11 +157,6 @@ promoted to 2.0.
     `dumpdef'.  The `c' flag has been updated to add information to the
     first line to show the definition of the macro being expanded.
 
-*** The `divert' builtin now accepts an optional second argument of text
-    that is immediately placed on the new diversion, regardless of whether
-    the current expansion is nested within argument collection of another
-    macro.
-
 *** The `dumpdef' builtin now always outputs to standard error, rather than
     the debug file specified by the `--debugfile' option or `debugfile'
     macro.
@@ -207,19 +202,21 @@ promoted to 2.0.
 
 
 * Noteworthy changes in Version 1.6 (????-??-??) [stable]
-  Released by ????, based on git version 1.4.10b.x-*
+  Released by ????, based on git versions 1.4.10b.x-* and 1.5.*
 
 ** Fix regression introduced in 1.4.4b where using `traceon' could delete
    a macro.  This was most noticeable with `traceon(`traceon')', but
    would also happen in cases such as `foo(traceon(`foo'))'.
 
-** Fix regressions introduced in 1.4.10b but not present in 1.4.11:
+** Fix regressions introduced in 1.4.10b:
 *** Using `builtin' or `indir' to perform nested `shift' calls triggered
-    an assertion failure.
+    an assertion failure (not present in 1.4.11).
 *** The command-line option -dV, as well as the builtin `debugmode(V)',
-    failed to enable `t' and `c' debug options.
+    failed to enable `t' and `c' debug options (not present in 1.4.11).
 *** Comments that contain unbalanced quotes were not rescanned correctly
-    when passed through address@hidden
+    when passed through $@ (not present in 1.4.11).
+*** Using `defn' on a traced but undefined macro triggered an assertion
+    failure (also present in 1.4.11, but not 1.4.12).
 
 ** Remove the undocumented command-line option '-N', as no one complained
    about the assertion failure regression that it introduced in 1.4.7.
@@ -244,6 +241,11 @@ promoted to 2.0.
    then apply this patch:
      http://git.sv.gnu.org/gitweb/?p=autoconf.git;a=commitdiff;h=56d42fa71
 
+** The `divert' builtin now accepts an optional second argument of text
+   that is immediately placed in the new diversion, regardless of whether
+   the current expansion is nested within argument collection of another
+   macro.
+
 ** The `-d'/`--debug' command-line option now understands `-' and `+'
    modifiers, the way the builtin `debugmode' has always done; this allows
    `-d-V' to disable prior debug settings from the command line, similar to
@@ -332,6 +334,42 @@ contains the following beta features that were deemed 
worth deferring until
 
 ** A number of portability improvements inherited from gnulib.
 
+* Noteworthy changes in Version 1.4.12 (2008-10-10) [stable]
+  Released by Eric Blake, based on git version 1.4.11.*
+
+** Fix regression introduced in 1.4.4b where using `traceon' could delete
+   a macro.  This was most noticeable with `traceon(`traceon')', but
+   would also happen in cases such as `foo(traceon(`foo'))'.
+
+** Fix regression introduced in 1.4.7 where `m4 -N9' died with an assertion
+   failure.
+
+** Fix regression introduced in 1.4.11 where `defn' died with an assertion
+   failure on a traced but undefined macro.
+
+** New `-g'/`--gnu' command-line option overrides `-G'/`--traditional'.
+   For now, the environment variable POSIXLY_CORRECT has no effect on M4
+   behavior; but a future release of M4 will behave as though --traditional
+   is implied if POSIXLY_CORRECT is set (this future change is necessary,
+   because in the current release, there is no way to disable GNU
+   extensions that conflict with POSIX without the use of a non-POSIX
+   command-line argument).  Clients of M4 that want to use GNU extensions,
+   even when POSIXLY_CORRECT is set, should start using the -g command-line
+   argument, even though it is currently a no-op if -G did not appear
+   earlier in the command line, so that the client will not break in the
+   face of an upgraded m4 and a POSIXLY_CORRECT execution environment.
+
+** The `-L'/`--nesting-limit' command-line option now defaults to 0 for
+   unlimited on platforms that can detect and deal with stack overflow.  On
+   systems that lack alternate stack support, such as Cygwin, and on
+   systems that do not obey the POSIX semantics for distinguishing stack
+   overflow from other exceptions, such as Linux, you can optionally
+   install the libsigsegv library (version 2.6 or newer recommended) to
+   enhance m4's ability to accurately report stack overflow:
+   http://www.gnu.org/software/libsigsegv/
+
+** A number of portability improvements inherited from gnulib.
+
 * Noteworthy changes in Version 1.4.11 (2008-04-02) [stable]
   Released by Eric Blake, based on git version 1.4.10a
 


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