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# This file is part of Autoconf. -*- Autoconf -*-
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# Interface with autoupdate.
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# Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2003
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# Free Software Foundation, Inc.
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# Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
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# 2003, 2004, 2006 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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# As a special exception, the Free Software Foundation gives unlimited
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# permission to copy, distribute and modify the configure scripts that
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# Roland McGrath, Noah Friedman, david d zuhn, and many others.
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## --------------------------------- ##
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## Defining macros in autoupdate::. ##
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## --------------------------------- ##
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# AU_DEFINE(NAME, GLUE-CODE, [MESSAGE])
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# -------------------------------------
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## ---------------------------------- ##
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## Macros to define obsolete macros. ##
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## ---------------------------------- ##
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# AU_DEFINE(NAME, CODE)
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# ---------------------
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# Define the macro NAME so that it expand to CODE only when
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# autoupdate is running. This is achieved with traces in
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# autoupdate itself, so this macro expands to nothing.
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# Declare `autoupdate::NAME' to be `GLUE-CODE', with all the needed
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# wrapping actions required by `autoupdate'.
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# We do not define anything in `autoconf::'.
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m4_define([AU_DEFINE],
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[AC_DEFUN([$1], [$2])])
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m4_define([AU_DEFINE], [])
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# AU_DEFUN(NAME, NEW-CODE, [MESSAGE])
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# -----------------------------------
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# Declare that the macro NAME is now obsoleted, and should be replaced
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# by NEW-CODE. Tell the user she should run autoupdate, and include
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# the additional MESSAGE.
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# by NEW-CODE. Tell the user she should run autoupdate, and when
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# autoupdate is run, emit MESSAGE as a warning and include it in
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# the updated configure.ac file.
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# Also define NAME as a macro which code is NEW-CODE.
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# This allows to share the same code for both supporting obsoleted macros,
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# This allows sharing the same code for both supporting obsoleted macros,
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# and to update a configure.ac.
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# See `acobsolete.m4' for a longer description.
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# See the end of `autoupdate.in' for a longer description.
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m4_define([AU_DEFUN],
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[AC_DIAGNOSE([obsolete], [The macro `$1' is obsolete.
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[# This is what autoupdate's m4 run will expand. It fires
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# the warning (with _au_warn_XXX), outputs it into the
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# updated configure.ac (with AC_DIAGNOSE), and then outputs
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# the replacement expansion.
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[m4_ifval([$3], [_au_warn_$1([$3])AC_DIAGNOSE([obsolete], [$3])d[]nl
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# This is an auxiliary macro that is also run when
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# autoupdate runs m4. It simply calls m4_warning, but
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# we need a wrapper so that each warning is emitted only
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# once. We break the quoting in m4_warning's argument in
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# order to expand this macro's arguments, not AU_DEFUN's.
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AU_DEFINE([_au_warn_$1],
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m4_define([_au_warn_$1], [])])
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# Finally, this is the expansion that is picked up by
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# autoconf. It tells the user to run autoupdate, and
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# then outputs the replacement expansion. We do not care
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# about autoupdate's warning because that contains
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# information on what to do *after* running autoupdate.
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[AC_DIAGNOSE([obsolete], [The macro `$1' is obsolete.
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You should run autoupdate.])dnl
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# AU_ALIAS(OLD-NAME, NEW-NAME)
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# Do not use `defn' since then autoupdate would replace an old macro
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# call with the new macro body instead of the new macro call.
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# Moreover, we have to take care that calls without parameters are
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# expanded to calls without parameters, not with one empty parameter.
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# This is not only an aesthetical improvement of autoupdate, it also
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# matters with poorly written macros which test for $# = 0.
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m4_define([AU_ALIAS],
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[AU_DEFUN([$1], [$2($][@)])])
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[AU_DEFUN([$1], _AU_ALIAS_BODY([$], [$2]))])
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# The body for the AU_DEFUN above should look like:
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# [m4_if($#, 0, [NEW-NAME], [NEW-NAME($@)])]
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# Thus the helper macro is:
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m4_define([_AU_ALIAS_BODY], [[m4_if($1#, 0, [$2], [$2($1@)])]])
added
removed
lib/autoconf/autoupdate.m4
