TODO update

[Eric Blake]

I'm getting closer to releasing autoconf 2.62.  This patch kills a bunch of 
completed TODO items.

Does anyone have a preference of whether I should release M4 1.4.11 first, and 
update autoconf to recommend it?  We currently recommend M4 1.4.8 or later.  I 
can't in good conscience recommend 1.4.10 since it is broken out-of-the-box on 
BSD-style stdio systems when dealing with any configure.ac that would result in 
a configure larger than a half megabyte.

From: Eric Blake <address@hidden>
Date: Fri, 28 Mar 2008 08:42:39 -0600
Subject: [PATCH] Update TODO based on completed tasks.

* TODO (AC_PROG_INSTALL takes multiple files): Done.
(AC_GNU_SOURCE deprecation): Done, see AC_USE_SYSTEM_EXTENSIONS.
(AC_COMPILE_IFELSE documentation): Done.
(Tracing builtins): Done, now that we require M4 1.4.5.
(AC_PROG_CC_POSIX suggestion, providing header files)
(AC_TYPE_SIGNAL): Not needed; gnulib's approach is better.
(cache consistency): Done with precious variables.

Signed-off-by: Eric Blake <address@hidden>
---
 ChangeLog |   11 ++++++++
 TODO      |   78 ++----------------------------------------------------------
 2 files changed, 14 insertions(+), 75 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index b13c280..a868e45 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,14 @@
+2008-03-28  Eric Blake  <address@hidden>
+
+       Update TODO based on completed tasks.
+       * TODO (AC_PROG_INSTALL takes multiple files): Done.
+       (AC_GNU_SOURCE deprecation): Done, see AC_USE_SYSTEM_EXTENSIONS.
+       (AC_COMPILE_IFELSE documentation): Done.
+       (Tracing builtins): Done, now that we require M4 1.4.5.
+       (AC_PROG_CC_POSIX suggestion, providing header files)
+       (AC_TYPE_SIGNAL): Not needed; gnulib's approach is better.
+       (cache consistency): Done with precious variables.
+
 2008-03-26  Eric Blake  <address@hidden>
 
        Document --trace=macro:format in --help output.
diff --git a/TODO b/TODO
index a463f84..6993dce 100644
--- a/TODO
+++ b/TODO
@@ -13,18 +13,6 @@ these suggestions... their presence here doesn't imply my 
endorsement.
 and the like, don't have a consistent way to handle multi-line
 arguments.  Fix, test, and document.
 
-** AC_PROG_INSTALL
-This test should be extended to check that install supports the GNU
-Install syntax: install FILES... DIR.  This will relieve everybody
-form having to use mkinstalldirs to create the directories, as install
-does it itself.  install-sh is already handling this case.  This also
-makes it simple not to create the directories where nothing will be
-installed because of configuration options, which is next to
-impossible using the current setting.
-
-In other words: everything is ready (install-sh and Automake), we just
-need a good reimplementation of AC_PROG_INSTALL.
-
 ** --target & AC_ARG_PROGRAM
 Shouldn't *any* `program' be installed as `$target_alias-program' even
 if AC_ARG_PROGRAM is not called?  That would be much more predictable.
@@ -54,9 +42,6 @@ even if they are slightly incompatible with C99.  The basic 
idea here
 is that AC_PROG_CC should disable pedanticisms and should enable
 extensions.
 
-** AC_GNU_SOURCE, AC_AIX, and AC_MINIX
-Deprecate these, as they will be superseded by the AC_PROG_CC changes.
-
 
 * Later
 
@@ -108,9 +93,6 @@ which requires to have two different sources: AC_LANG_CALL 
and
 AC_LANG_FUNC_LINK_TRY (which names seem to be inappropriate).
 Wouldn't one be enough?
 
-** Document AC_COMPILE_IFELSE, AC_LANG_PROGRAM etc.
-And make AC_TRY_COMPILE etc. obsolete.
-
 ** Libtool
 Define once for all the hooks they need, any redefinition of
 AC_PROG_CC etc. is way too dangerous and too limiting.  The GCC team
@@ -240,32 +222,7 @@ this for translators.
 
 ** Tracing `builtin'
 F**k!  --trace FOO does not catch indir([FOO], $@)!
-
-** Tracing builtins
-GNU M4 1.4's tracing of builtins is buggy.  When run on this input:
-
-| divert(-1)
-| changequote([, ])
-| define([m4_eval], defn([eval]))
-| eval(1)
-| m4_eval(2)
-| undefine([eval])
-| m4_eval(3)
-
-it behaves this way:
-
-| % m4 input.m4 -da -t eval
-| m4trace: -1- eval(1)
-| m4trace: -1- m4_eval(2)
-| m4trace: -1- m4_eval(3)
-| %
-
-Conversely:
-
-| % m4 input.m4 -da -t m4_eval
-| %
-
-------------------------------------------------------------------------------
+Fixed in M4 1.6, but we can't rely on it yet.
 
 * Autoconf 3
 
@@ -354,11 +311,6 @@ require a specific AC_ tests, but a specialized AS_ macro.
 
 ------------------------------------------------------------------------------
 
-* Add AC_PROG_CC_POSIX to replace the current ad-hoc macros for AIX,
-  Minix, ISC, etc.
-
-------------------------------------------------------------------------------
-
 * Select the right CONFIG_SHELL automatically (for Ultrix, Lynx especially.)
 
 ------------------------------------------------------------------------------
@@ -370,8 +322,6 @@ require a specific AC_ tests, but a specialized AS_ macro.
 
 * Mike Haertel's suggestions:
 
-** Provide header files containing decls for alloca, strings, etc.
-
 ** Cross compiling:
 
 *** Error messages include instructions for overriding defaults using
@@ -396,12 +346,6 @@ the same configure script.
 
 ------------------------------------------------------------------------------
 
-For AC_TYPE_SIGNAL signal handlers, provide a way for code to know
-whether to do "return 0" or "return" (int vs void) to avoid compiler
-warnings.  (Roland McGrath)
-
-------------------------------------------------------------------------------
-
 In config.status comment, put the host/target/build types, if used.
 
 ------------------------------------------------------------------------------
@@ -542,22 +486,6 @@ Slaven Rezic <address@hidden>
 
 ------------------------------------------------------------------------------
 
-Cache consistency checking: ignore cache if environment
-(CC or PATH) differs.
-From Mike Haertel
-
-So we need a general mechanism for storing variables' values in the cache,
-and checking if they are the same after reading the cache.  Then we can add
-to the list of variables as we come across the need.  So far we want
-LD_LIBRARY_PATH and the internal variables for some of (all?) the args.
-From: address@hidden (Roland McGrath)
-
-Hmm.  That list might include LD_LIBRARY_PATH, LD_RUN_PATH (for solaris),
-and PATH.  I can't think of any others so far.
-From: address@hidden (Noah Friedman)
-
-------------------------------------------------------------------------------
-
 Every user running X11 usually has a directory like *X11* in his PATH
 variable. By replacing bin by include, you can find good places to
 look for the include files or libraries.
@@ -651,8 +579,8 @@ with autoconf scripts.
 
 ------------------------------------------------------------------------------
 
-Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002, 2007 Free
-Software Foundation, Inc.
+Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002, 2007, 2008
+Free Software Foundation, Inc.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
-- 
1.5.4