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Revert the behavioral changes in AC_LINK_FILES, and add several

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clarificataions about the brokenness of AU_DEFUN's third argument.
This commit is contained in:
Paolo Bonzini 2003-11-25 13:50:45 +00:00
parent 90f031cf0b
commit abbcaca79f
3 changed files with 29 additions and 18 deletions
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12
doc/autoconf.texi
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@ -8846,18 +8846,16 @@ with their modern implementation.
Autoconf provides a simple means to obsolete a macro.
@defmac AU_DEFUN (@var{old-macro}, @var{implementation})
@defmac AU_DEFUN (@var{old-macro}, @var{implementation}, @ovar{message})
@acindex{DEFUN}
@acindex{AU_DEFUN}
Define @var{old-macro} as @var{implementation}. The only difference
with @code{AC_DEFUN} is that the user will be warned that
@var{old-macro} is now obsolete; if she then uses @command{autoupdate},
the call to @var{old-macro} will be replaced by the modern
@var{implementation}.
@var{old-macro} is now obsolete.
Note that you can provide another definition with @code{AC_DEFUN} in
order to update the way a macro is used without making it completely
obsolete.
If she then uses @command{autoupdate}, the call to @var{old-macro} will be
replaced by the modern @var{implementation}. In the future,
@command{autoupdate} will then print the additional @var{message}.
@end defmac
@node Coding Style

14
lib/autoconf/autoupdate.m4
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@ -50,17 +50,23 @@
# Roland McGrath, Noah Friedman, david d zuhn, and many others.
## ----------------------------------- ##
## Defining macros to be autoupdated. ##
## ----------------------------------- ##
## ---------------------------------- ##
## Macros to define obsolete macros. ##
## ---------------------------------- ##
# AU_DEFUN(NAME, NEW-CODE)
# AU_DEFUN(NAME, NEW-CODE, [MESSAGE])
# -----------------------------------
# Declare that the macro NAME is now obsoleted, and should be replaced
# by NEW-CODE. Tell the user she should run autoupdate, and include
# the additional MESSAGE.
#
# FIXME: MESSAGE should be grabbed with autom4te traces, and that's
# why it is never used in the body of the macro; however, as of 2003-11-25
# it is never used and it seems that it never was. Also, MESSAGE is
# used only once in AC_LINK_FILES, it may be the case to remove it from
# there. See the FIXME in AC_LINK_FILES as well.
#
# Also define NAME as a macro which code is NEW-CODE.
#
# This allows to share the same code for both supporting obsoleted macros,

21
lib/autoconf/status.m4
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@ -735,12 +735,7 @@ m4_define([AC_LIST_LINKS_COMMANDS])
#
# _AC_LINK_CNT is used to be robust to multiple calls.
AU_DEFUN([AC_LINK_FILES],
[AC_DIAGNOSE([obsolete], [
It is technically impossible to `autoupdate' cleanly from AC_LINK_FILES
to AC_CONFIG_FILES. `autoupdate' provides a functional but inelegant
update, you should probably tune the result yourself and remove this
warning.])
m4_if($#, 2, ,
[m4_if($#, 2, ,
[m4_fatal([$0: incorrect number of arguments])])dnl
m4_define([_AC_LINK_FILES_CNT], m4_incr(_AC_LINK_FILES_CNT))dnl
ac_sources="$1"
@ -751,7 +746,19 @@ while test -n "$ac_sources"; do
[ac_config_links_]_AC_LINK_FILES_CNT="$[ac_config_links_]_AC_LINK_FILES_CNT $ac_dest:$ac_source"
done
AC_CONFIG_LINKS($[ac_config_links_]_AC_LINK_FILES_CNT)dnl
])
],
dnl FIXME: Macros such as AC_USG put messages like this into an
dnl AC_DIAGNOSE macro, in the first parameter of AU_DEFUN. We cannot
dnl do the same with this one, because it makes no sense to print it
dnl when running `autoconf -W obsolete' on a configure script that uses
dnl AC_LINK_FILES. Instead, only `autoupdate' should print it (it may
dnl be acceptable that autoupdated configure scripts print this message
dnl when running `autoconf -W obsolete'). As of 2003-11-25, the third
dnl argument to AU_DEFUN is broken, so this is never seen by the user.
[
It is technically impossible to `autoupdate' cleanly from AC_LINK_FILES
to AC_CONFIG_FILES. `autoupdate' provides a functional but inelegant
update, you should probably tune the result yourself.])# AC_LINK_FILES
# Initialize.