* Makefile.am: Adjusted for libm4.m4.
* acgeneral.m4 (m4_errprint, m4_warn, m4_fatal, m4_prefix,
m4_eval, m4_shift, m4_format, m4_include_unique, m4_include,
m4_sinclude, m4_quote, m4_split, m4_join, m4_strip, m4_append,
m4_list_append, ifval, ifset, m4_default, m4_case, m4_match,
m4_foreach): Moved from here, to...
* libm4.m4: here.
* acgeneral.m4 (AC_WRAP): Moved from here, to...
* libm4.m4 (m4_wrap): here. All callers changed.
* acgeneral.m4: Don't include acversion.m4.
* autoconf.m4: Include libm4.m4 and acversion.m4.
* autoheader.m4: Likewise.
+2000-02-07 Akim Demaille <akim@epita.fr>
+
+ Create libm4.m4.
+
+ * Makefile.am: Adjusted for libm4.m4.
+
+ * acgeneral.m4 (m4_errprint, m4_warn, m4_fatal, m4_prefix,
+ m4_eval, m4_shift, m4_format, m4_include_unique, m4_include,
+ m4_sinclude, m4_quote, m4_split, m4_join, m4_strip, m4_append,
+ m4_list_append, ifval, ifset, m4_default, m4_case, m4_match,
+ m4_foreach): Moved from here, to...
+ * libm4.m4: here.
+ * acgeneral.m4 (AC_WRAP): Moved from here, to...
+ * libm4.m4 (m4_wrap): here. All callers changed.
+
+ * acgeneral.m4: Don't include acversion.m4.
+ * autoconf.m4: Include libm4.m4 and acversion.m4.
+ * autoheader.m4: Likewise.
+
2000-02-07 Akim Demaille <akim@epita.fr>
AC_CHECK_SIZEOF: Fix a bug, use standard default headers, and
## Process this file with automake to create Makefile.in.
## Makefile for Autoconf.
-## Copyright (C) 1999 Free Software Foundation, Inc.
+## Copyright (C) 1999, 2000 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
distpkgdataDATA = \
acfunctions acheaders acidentifiers acmakevars acprograms \
-acgeneral.m4 acoldnames.m4 acspecific.m4 autoconf.m4 autoheader.m4
+libm4.m4 acgeneral.m4 acoldnames.m4 acspecific.m4 autoconf.m4 autoheader.m4
nodistpkgdataDATA = autoconf.m4f autoheader.m4f acversion.m4
.m4.m4f:
@case `$(M4) --help </dev/null 2>&1` in \
*reload-state*) echo freezing $*.m4; \
- $(M4) -F $*.m4f -I${srcdir} ${srcdir}/$*.m4 ;; \
- *traditional*) ;; \
- *) echo Error: Autoconf requires GNU m4 1.1 or later; exit 1 ;; \
+ $(M4) -F $*.m4f -I$(srcdir) $(srcdir)/$*.m4 ;; \
+ *) echo Error: Autoconf requires GNU m4 1.4 or later; exit 1 ;; \
esac
-autoconf.m4f: autoconf.m4 acgeneral.m4 acspecific.m4 acoldnames.m4 acversion.m4
-autoheader.m4f: autoheader.m4 acgeneral.m4 acspecific.m4 acoldnames.m4 acversion.m4
+autoconf.m4f: autoconf.m4 libm4.m4 acgeneral.m4 acspecific.m4 acoldnames.m4 acversion.m4
+autoheader.m4f: autoheader.m4 libm4.m4 acgeneral.m4 acspecific.m4 acoldnames.m4 acversion.m4
# The documentation
# s/nodistpackageDATA/nodist_pkgdata_DATA/
# and adapt dependencies once we use a more recent Automake
-distpkgdataDATA = acfunctions acheaders acidentifiers acmakevars acprograms acgeneral.m4 acoldnames.m4 acspecific.m4 autoconf.m4 autoheader.m4
+distpkgdataDATA = acfunctions acheaders acidentifiers acmakevars acprograms libm4.m4 acgeneral.m4 acoldnames.m4 acspecific.m4 autoconf.m4 autoheader.m4
nodistpkgdataDATA = autoconf.m4f autoheader.m4f acversion.m4
.m4.m4f:
@case `$(M4) --help </dev/null 2>&1` in \
*reload-state*) echo freezing $*.m4; \
- $(M4) -F $*.m4f -I${srcdir} ${srcdir}/$*.m4 ;; \
- *traditional*) ;; \
- *) echo Error: Autoconf requires GNU m4 1.1 or later; exit 1 ;; \
+ $(M4) -F $*.m4f -I$(srcdir) $(srcdir)/$*.m4 ;; \
+ *) echo Error: Autoconf requires GNU m4 1.4 or later; exit 1 ;; \
esac
-autoconf.m4f: autoconf.m4 acgeneral.m4 acspecific.m4 acoldnames.m4 acversion.m4
-autoheader.m4f: autoheader.m4 acgeneral.m4 acspecific.m4 acoldnames.m4 acversion.m4
+autoconf.m4f: autoconf.m4 libm4.m4 acgeneral.m4 acspecific.m4 acoldnames.m4 acversion.m4
+autoheader.m4f: autoheader.m4 libm4.m4 acgeneral.m4 acspecific.m4 acoldnames.m4 acversion.m4
# The documentation
dnl Franc,ois Pinard, Karl Berry, Richard Pixley, Ian Lance Taylor,
dnl Roland McGrath, Noah Friedman, david d zuhn, and many others.
dnl
-divert(-1)dnl Throw away output until AC_INIT is called.
-changequote([, ])
-
-include(acversion.m4)
-
-dnl Some old m4's don't support m4exit. But they provide
-dnl equivalent functionality by core dumping because of the
-dnl long macros we define.
-ifdef([__gnu__], , [errprint(Autoconf requires GNU m4.
-Install it before installing Autoconf or set the
-M4 environment variable to its path name.
-)m4exit(2)])
-
-
-dnl m4_errprint(MSG)
-dnl ----------------
-dnl Same as `errprint', but reports the file and line.
-define(m4_errprint, [errprint(__file__:__line__: [$1
-])])
-
-
-dnl m4_warn(MSG)
-dnl ------------
-dnl Warn the user.
-define(m4_warn, [m4_errprint([warning: $1])])
-
-
-dnl m4_fatal(MSG, [EXIT-STATUS])
-dnl ----------------------------
-dnl Fatal the user. :)
-define(m4_fatal,
-[m4_errprint([error: $1])dnl
-m4exit(ifelse([$2],, 1, [$2]))])
-
-
-dnl Some m4 internals have names colliding with tokens we might use.
-dnl Rename them a` la `m4 --prefix-builtins'.
-define([m4_prefix],
-[define([m4_$1], defn([$1]))
-undefine([$1])])
-
-m4_prefix([eval])
-m4_prefix([shift])
-m4_prefix([format])
-
-
-dnl We also want to neutralize include (and sinclude for symmetry),
-dnl but we want to extend them slightly: warn when a file is included
-dnl several times. This is in general a dangerous operation because
-dnl quite nobody quotes the first argument of define.
-dnl
-dnl For instance in the following case:
-dnl define(foo, [bar])
-dnl then a second reading will turn into
-dnl define(bar, [bar])
-dnl which is certainly not what was meant.
-
-
-dnl m4_include_unique(FILE)
-dnl -----------------------
-dnl Declare that the FILE was loading; and warn if it has already
-dnl been included.
-define(m4_include_unique,
-[ifdef([m4_include($1)],
- [m4_warn([file `$1' included several times])])dnl
-define([m4_include($1)])])
-
-
-dnl m4_include(FILE)
-dnl ----------------
-dnl As the builtin include, but warns against multiple inclusions.
-define(m4_include,
-[m4_include_unique([$1])dnl
-builtin([include], [$1])])
-
-
-dnl m4_sinclude(FILE)
-dnl -----------------
-dnl As the builtin sinclude, but warns against multiple inclusions.
-define(m4_sinclude,
-[m4_include_unique([$1])dnl
-builtin([sinclude], [$1])])
-
-dnl Neutralize include and sinclude.
-undefine([include])
-undefine([sinclude])
-
-dnl ------------------------------------------------------------
-dnl Text processing in m4.
-dnl ------------------------------------------------------------
-
-dnl m4_quote(STRING)
-dnl ----------------
-dnl Return STRING quoted.
-dnl
-dnl It is important to realize the difference between `quote(exp)' and
-dnl `[exp]': in the first case you obtain the quoted *result* of the
-dnl expansion of EXP, while in the latter you just obtain the string
-dnl `exp'.
-define([m4_quote], [[$@]])
-
-
-dnl m4_split(STRING, [REGEXP])
-dnl --------------------------
-dnl Split STRING into an m4 list of quoted elements. The elements are
-dnl quoted with [ and ]. Beginning spaces and end spaces *are kept*.
-dnl Use m4_strip to remove them.
-dnl
-dnl REGEXP specifies where to split. Default is [\t ]+.
-dnl
-dnl Pay attention to the changequotes. Inner changequotes exist for
-dnl obvious reasons (we want to insert square brackets). Outer
-dnl changequotes are needed because otherwise the m4 parser, when it
-dnl sees the closing bracket we add to the result, believes it is the
-dnl end of the body of the macro we define.
-dnl
-dnl Also, notice that $1 is quoted twice, since we want the result to be
-dnl quoted. Then you should understand that the argument of patsubst is
-dnl ``STRING'' (i.e., with additional `` and '').
-dnl
-dnl This macro is safe on active symbols, i.e.:
-dnl define(active, ACTIVE)
-dnl m4_split([active active ])end
-dnl => [active], [active], []end
-changequote(<<, >>)
-define(<<m4_split>>,
-<<changequote(``, '')dnl
-[dnl Can't use m4_default here instead of ifelse, because m4_default uses
-dnl [ and ] as quotes.
-patsubst(````$1'''',
- ifelse(``$2'',, ``[ ]+'', ``$2''),
- ``], ['')]dnl
-changequote([, ])>>)
-changequote([, ])
-
-
-dnl m4_join(STRING)
-dnl ---------------
-dnl If STRING contains end of lines, replace them with spaces. If there
-dnl are backslashed end of lines, remove them. This macro is safe with
-dnl active symbols.
-dnl define(active, ACTIVE)
-dnl m4_join([active
-dnl act\
-dnl ive])end
-dnl => active activeend
-define([m4_join],
-[translit(patsubst([[[$1]]], [\\
-]), [
-], [ ])])
-
-
-dnl m4_strip(STRING)
-dnl ----------------
-dnl Expands into STRING with tabs and spaces singled out into a single
-dnl space, and removing leading and trailing spaces.
-dnl
-dnl This macro is robust to active symbols.
-dnl define(active, ACTIVE)
-dnl m4_strip([ active active ])end
-dnl => active activeend
-dnl
-dnl This macro is fun! Because we want to preserve active symbols, STRING
-dnl must be quoted for each evaluation, which explains there are 4 levels
-dnl of brackets around $1 (don't forget that the result must be quoted
-dnl too, hence one more quoting than applications).
-dnl
-dnl Then notice the patsubst of the middle: it is in charge of removing
-dnl the leading space. Why not just `patsubst(..., [^ ])'? Because this
-dnl macro will receive the output of the preceding patsubst, i.e. more or
-dnl less [[STRING]]. So if there is a leading space in STRING, then it is
-dnl the *third* character, since there are two leading `['; Equally for
-dnl the outer patsubst.
-define([m4_strip],
-[patsubst(patsubst(patsubst([[[[$1]]]],
- [[ ]+], [ ]),
- [^\(..\) ], [\1]),
- [ \(.\)$], [\1])])
-
-
-
-dnl m4_append(MACRO-NAME, STRING)
-dnl -----------------------------
-dnl Redefine MACRO-NAME to hold its former content plus STRING at the
-dnl end. It is valid to use this macro with MACRO-NAME undefined.
-dnl
-dnl This macro is robust to active symbols. It can be used to grow
-dnl strings.
-dnl
-dnl | define(active, ACTIVE)
-dnl | m4_append([sentence], [This is an])
-dnl | m4_append([sentence], [ active ])
-dnl | m4_append([sentence], [symbol.])
-dnl | sentence
-dnl | undefine([active])dnl
-dnl | sentence
-dnl => This is an ACTIVE symbol.
-dnl => This is an active symbol.
-dnl
-dnl It can be used to define hooks.
-dnl
-dnl | define(active, ACTIVE)
-dnl | m4_append([hooks], [define([act1], [act2])])
-dnl | m4_append([hooks], [define([act2], [active])])
-dnl | undefine([active])
-dnl | act1
-dnl | hooks
-dnl | act1
-dnl => act1
-dnl =>
-dnl => active
-define(m4_append,
-[define([$1],
-ifdef([$1], [defn([$1])])[$2])])
-
-
-dnl m4_list_append(MACRO-NAME, STRING)
-dnl ----------------------------------
-dnl Same as `m4_append', but each element is separated by `, '.
-define(m4_list_append,
-[define([$1],
-ifdef([$1], [defn([$1]), ])[$2])])
-
-
-dnl ------------------------------------------------------------
-dnl Some additional m4 structural control.
-dnl ------------------------------------------------------------
-
-dnl Both `ifval' and `ifset' tests against the empty string. The
-dnl difference is that `ifset' is specialized on macros.
-dnl
-dnl In case of arguments of macros, eg $[1], it makes little difference.
-dnl In the case of a macro `FOO', you don't want to check `ifval(FOO,
-dnl TRUE)', because if `FOO' expands with commas, there is a shifting of
-dnl the arguments. So you want to run `ifval([FOO])', but then you just
-dnl compare the *string* `FOO' against `', which, of course fails.
-dnl
-dnl So you want a variation of `ifset' that expects a macro name as $[1].
-dnl If this macro is both defined and defined to a non empty value, then
-dnl it runs TRUE etc.
-
-
-dnl ifval(COND, IF-TRUE[, IF-FALSE])
-dnl --------------------------------
-dnl If COND is not the empty string, expand IF-TRUE, otherwise IF-FALSE.
-dnl Comparable to ifdef.
-define([ifval], [ifelse([$1],[],[$3],[$2])])
-
-
-dnl ifset(MACRO, IF-TRUE[, IF-FALSE])
-dnl --------------------------------
-dnl If MACRO has no definition, or of its definition is the empty string,
-dnl expand IF-FALSE, otherwise IF-TRUE.
-define([ifset],
-[ifdef([$1],
- [ifelse(defn([$1]), [], [$3], [$2])],
- [$3])])
-
-
-dnl m4_default(EXP1, EXP2)
-dnl ----------------------
-dnl Returns EXP1 if non empty, otherwise EXP2.
-define([m4_default], [ifval([$1], [$1], [$2])])
-
-
-# m4_case(SWITCH, VAL1, IF-VAL1, VAL2, IF-VAL2, ..., DEFAULT)
-# -----------------------------------------------------------
-# m4 equivalent of
-# switch (SWITCH)
-# {
-# case VAL1:
-# IF-VAL1;
-# break;
-# case VAL2:
-# IF-VAL2;
-# break;
-# ...
-# default:
-# DEFAULT;
-# break;
-# }.
-# All the values are optional, and the macro is robust to active
-# symbols properly quoted.
-define(m4_case,
-[ifelse([$#], 0, [],
- [$#], 1, [],
- [$#], 2, [$2],
- [$1], [$2], [$3],
- [m4_case([$1], m4_shift(m4_shift(m4_shift($@))))])])
-
-
-# m4_match(SWITCH, RE1, VAL1, RE2, VAL2, ..., DEFAULT)
-# ----------------------------------------------------
-# m4 equivalent of
-#
-# if (SWITCH =~ RE1)
-# VAL1;
-# elif (SWITCH =~ RE2)
-# VAL2;
-# elif ...
-# ...
-# else
-# DEFAULT
-#
-# All the values are optional, and the macro is robust to active symbols
-# properly quoted.
-define(m4_match,
-[ifelse([$#], 0, [],
- [$#], 1, [],
- [$#], 2, [$2],
- regexp([$1], [$2]), -1, [m4_match([$1],
- m4_shift(m4_shift(m4_shift($@))))],
- [$3])])
-
-
-## --------------------- ##
-## Implementing m4 loops ##
-## --------------------- ##
-
-
-# Implementing loops (`foreach' loops) in m4 is much more tricky than it
-# may seem. Actually, the example of a `foreach' loop in the m4
-# documentation is wrong: it does not quote the arguments properly,
-# which leads to undesired expansions.
-#
-# The example in the documentation is:
-#
-# | # foreach(x, (item_1, item_2, ..., item_n), stmt)
-# | define(`foreach',
-# | `pushdef(`$1', `')_foreach(`$1', `$2', `$3')popdef(`$1')')
-# | define(`_arg1', `$1')
-# | define(`_foreach',
-# | `ifelse(`$2', `()', ,
-# | `define(`$1', _arg1$2)$3`'_foreach(`$1', (shift$2), `$3')')')
-#
-# But then if you run
-#
-# | define(a, 1)
-# | define(b, 2)
-# | define(c, 3)
-# | foreach(`f', `(`a', `(b', `c)')', `echo f
-# | ')
-#
-# it gives
-#
-# => echo 1
-# => echo (2,3)
-#
-# which is not what is expected.
-#
-# Once you understood this, you turn yourself into a quoting wizard,
-# and come up with the following solution:
-#
-# | # foreach(x, (item_1, item_2, ..., item_n), stmt)
-# | define(`foreach', `pushdef(`$1', `')_foreach($@)popdef(`$1')')
-# | define(`_arg1', ``$1'')
-# | define(`_foreach',
-# | `ifelse($2, `()', ,
-# | `define(`$1', `_arg1$2')$3`'_foreach(`$1', `(shift$2)', `$3')')')
-#
-# which this time answers
-#
-# => echo a
-# => echo (b
-# => echo c)
-#
-# Bingo!
-
-
-# m4_foreach(VARIABLE, LIST, EXPRESSION)
-# --------------------------------------
-# Expand EXPRESSION assigning to VARIABLE each value of the LIST
-# (LIST should have the form `[(item_1, item_2, ..., item_n)]'),
-# i.e. the whole list should be *quoted*. Quote members too if
-# you don't want them to be expanded.
-#
-# This macro is robust to active symbols:
-# define(active, ACTIVE)
-# m4_foreach([Var], [([active], [b], [active])], [-Var-])end
-# => -active--b--active-end
-define(m4_foreach,
-[pushdef([$1], [])_m4_foreach($@)popdef([$1])])
-
-dnl Low level macros used to define m4_foreach
-define(m4_car, [[$1]])
-define(_m4_foreach,
-[ifelse($2, [()], ,
- [define([$1], [m4_car$2])$3[]_m4_foreach([$1],
- [(m4_shift$2)],
- [$3])])])
-
-
-
dnl ### Defining macros
[indir([$1], m4_shift($@))])])
-dnl ## --------------------------------- ##
-dnl ## Helping macros to display strings ##
-dnl ## --------------------------------- ##
-
-
-dnl AC_WRAP(STRING [, PREFIX[, FIRST-PREFIX[, WIDTH]]]]))
-dnl -----------------------------------------------------
-dnl Expands into STRING wrapped to hold in WIDTH columns (default = 79).
-dnl If prefix is set, each line is prefixed with it. If FIRST-PREFIX is
-dnl specified, then the first line is prefixed with it. As a special
-dnl case, if the length of the first prefix is greater than that of
-dnl PREFIX, then FIRST-PREFIX will be left alone on the first line.
-dnl
-dnl Typical outputs are:
-dnl
-dnl AC_WRAP([Short string */], [ ], [/* ], 20)
-dnl => /* Short string */
-dnl
-dnl AC_WRAP([Much longer string */], [ ], [/* ], 20)
-dnl => /* Much longer
-dnl => string */
-dnl
-dnl AC_WRAP([Short doc.], [ ], [ --short ], 30)
-dnl => --short Short doc.
-dnl
-dnl AC_WRAP([Short doc.], [ ], [ --too-wide ], 30)
-dnl => --too-wide
-dnl => Short doc.
-dnl
-dnl AC_WRAP([Super long documentation.], [ ], [ --too-wide ], 30)
-dnl => --too-wide
-dnl => Super long
-dnl => documentation.
-dnl
-dnl FIXME: there is no checking of a longer PREFIX than WIDTH, but do
-dnl we really want to bother with people trying each single corner
-dnl of a software?
-dnl
-dnl This macro does not leave a trailing space behind the last word,
-dnl what complicates it a bit. The algorithm is stupid simple: all the
-dnl words are preceded by AC_Separator which is defined to empty for the
-dnl first word, and then ` ' (single space) for all the others.
-define([AC_WRAP],
-[pushdef([AC_Prefix], m4_default([$2], []))dnl
-pushdef([AC_Prefix1], m4_default([$3], [AC_Prefix]))dnl
-pushdef([AC_Width], m4_default([$4], 79))dnl
-pushdef([AC_Cursor], len(AC_Prefix1))dnl
-pushdef([AC_Separator], [])dnl
-AC_Prefix1[]dnl
-ifelse(m4_eval(AC_Cursor > len(AC_Prefix)),
- 1, [define([AC_Cursor], len(AC_Prefix))
-AC_Prefix])[]dnl
-AC_FOREACH([AC_Word], [$1],
-[define([AC_Cursor], m4_eval(AC_Cursor + len(AC_Word) + 1))dnl
-dnl New line if too long, else insert a space unless it is the first
-dnl of the words.
-ifelse(m4_eval(AC_Cursor > AC_Width),
- 1, [define([AC_Cursor], m4_eval(len(AC_Prefix) + len(AC_Word) + 1))]
-AC_Prefix,
- [AC_Separator])[]dnl
-AC_Word[]dnl
-define([AC_Separator], [ ])])dnl
-popdef([AC_Separator])dnl
-popdef([AC_Cursor])dnl
-popdef([AC_Width])dnl
-popdef([AC_Prefix1])dnl
-popdef([AC_Prefix])dnl
-])
+## --------------------------------- ##
+## Helping macros to display strings ##
+## --------------------------------- ##
dnl AC_HELP_STRING(LHS, RHS[, COLUMN])
define([AC_HELP_STRING],
[pushdef([AC_Prefix], m4_default([$3], [ ]))dnl
pushdef([AC_Prefix_Format], [ %-]m4_eval(len(AC_Prefix) - 3)[s ])dnl [ %-23s ]
-AC_WRAP([$2], AC_Prefix, m4_format(AC_Prefix_Format, [$1]))dnl
+m4_wrap([$2], AC_Prefix, m4_format(AC_Prefix_Format, [$1]))dnl
popdef([AC_Prefix_Format])dnl
popdef([AC_Prefix])dnl
])
dnl --------------
AC_DEFUN(AC_INIT_NOTICE,
[# Guess values for system-dependent variables and create Makefiles.
-# Generated automatically using Autoconf version] AC_ACVERSION [
+# Generated automatically using Autoconf version ]AC_ACVERSION[
# Copyright (C) 1992, 93, 94, 95, 96, 98, 1999 Free Software Foundation, Inc.
#
# This configure script is free software; the Free Software Foundation
# Files that config.status was made for.
ifset([AC_LIST_FILES], [config_files="\\
-AC_WRAP(AC_LIST_FILES, [ ])"
+m4_wrap(AC_LIST_FILES, [ ])"
])dnl
ifset([AC_LIST_HEADERS], [config_headers="\\
-AC_WRAP(AC_LIST_HEADERS, [ ])"
+m4_wrap(AC_LIST_HEADERS, [ ])"
])dnl
ifset([AC_LIST_LINKS], [config_links="\\
-AC_WRAP(AC_LIST_LINKS, [ ])"
+m4_wrap(AC_LIST_LINKS, [ ])"
])dnl
ifset([AC_LIST_COMMANDS], [config_commands="\\
-AC_WRAP(AC_LIST_COMMANDS, [ ])"
+m4_wrap(AC_LIST_COMMANDS, [ ])"
])dnl
ac_cs_usage="\\
dnl
dnl Written by David MacKenzie.
dnl
-include(acgeneral.m4)dnl
-builtin(include, acspecific.m4)dnl
-builtin(include, acoldnames.m4)dnl
+include(libm4.m4)dnl
+m4_include(acversion.m4)dnl
+m4_include(acgeneral.m4)dnl
+m4_include(acspecific.m4)dnl
+m4_include(acoldnames.m4)dnl
dnl Do not sinclude acsite.m4 here, because it may not be installed
dnl yet when Autoconf is frozen.
dnl Do not sinclude ./aclocal.m4 here, to prevent it from being frozen.
dnl
dnl Written by Roland McGrath.
dnl
-include(acgeneral.m4)dnl
+include(libm4.m4)dnl
+m4_include(acversion.m4)dnl
+m4_include(acgeneral.m4)dnl
m4_include(acspecific.m4)dnl
m4_include(acoldnames.m4)dnl
dnl of DESCRIPTION (properly wrapped), and then #undef KEY.
define([AH_TEMPLATE],
[AH_VERBATIM([$1],
- AC_WRAP([$2 */], [ ], [/* ])[
+ m4_wrap([$2 */], [ ], [/* ])[
#undef $1])])
## Process this file with automake to create Makefile.in.
## Makefile for Autoconf.
-## Copyright (C) 1999 Free Software Foundation, Inc.
+## Copyright (C) 1999, 2000 Free Software Foundation, Inc.
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
distpkgdataDATA = \
acfunctions acheaders acidentifiers acmakevars acprograms \
-acgeneral.m4 acoldnames.m4 acspecific.m4 autoconf.m4 autoheader.m4
+libm4.m4 acgeneral.m4 acoldnames.m4 acspecific.m4 autoconf.m4 autoheader.m4
nodistpkgdataDATA = autoconf.m4f autoheader.m4f acversion.m4
.m4.m4f:
@case `$(M4) --help </dev/null 2>&1` in \
*reload-state*) echo freezing $*.m4; \
- $(M4) -F $*.m4f -I${srcdir} ${srcdir}/$*.m4 ;; \
- *traditional*) ;; \
- *) echo Error: Autoconf requires GNU m4 1.1 or later; exit 1 ;; \
+ $(M4) -F $*.m4f -I$(srcdir) $(srcdir)/$*.m4 ;; \
+ *) echo Error: Autoconf requires GNU m4 1.4 or later; exit 1 ;; \
esac
-autoconf.m4f: autoconf.m4 acgeneral.m4 acspecific.m4 acoldnames.m4 acversion.m4
-autoheader.m4f: autoheader.m4 acgeneral.m4 acspecific.m4 acoldnames.m4 acversion.m4
+autoconf.m4f: autoconf.m4 libm4.m4 acgeneral.m4 acspecific.m4 acoldnames.m4 acversion.m4
+autoheader.m4f: autoheader.m4 libm4.m4 acgeneral.m4 acspecific.m4 acoldnames.m4 acversion.m4
# The documentation
# s/nodistpackageDATA/nodist_pkgdata_DATA/
# and adapt dependencies once we use a more recent Automake
-distpkgdataDATA = acfunctions acheaders acidentifiers acmakevars acprograms acgeneral.m4 acoldnames.m4 acspecific.m4 autoconf.m4 autoheader.m4
+distpkgdataDATA = acfunctions acheaders acidentifiers acmakevars acprograms libm4.m4 acgeneral.m4 acoldnames.m4 acspecific.m4 autoconf.m4 autoheader.m4
nodistpkgdataDATA = autoconf.m4f autoheader.m4f acversion.m4
.m4.m4f:
@case `$(M4) --help </dev/null 2>&1` in \
*reload-state*) echo freezing $*.m4; \
- $(M4) -F $*.m4f -I${srcdir} ${srcdir}/$*.m4 ;; \
- *traditional*) ;; \
- *) echo Error: Autoconf requires GNU m4 1.1 or later; exit 1 ;; \
+ $(M4) -F $*.m4f -I$(srcdir) $(srcdir)/$*.m4 ;; \
+ *) echo Error: Autoconf requires GNU m4 1.4 or later; exit 1 ;; \
esac
-autoconf.m4f: autoconf.m4 acgeneral.m4 acspecific.m4 acoldnames.m4 acversion.m4
-autoheader.m4f: autoheader.m4 acgeneral.m4 acspecific.m4 acoldnames.m4 acversion.m4
+autoconf.m4f: autoconf.m4 libm4.m4 acgeneral.m4 acspecific.m4 acoldnames.m4 acversion.m4
+autoheader.m4f: autoheader.m4 libm4.m4 acgeneral.m4 acspecific.m4 acoldnames.m4 acversion.m4
# The documentation
dnl
dnl Written by David MacKenzie.
dnl
-include(acgeneral.m4)dnl
-builtin(include, acspecific.m4)dnl
-builtin(include, acoldnames.m4)dnl
+include(libm4.m4)dnl
+m4_include(acversion.m4)dnl
+m4_include(acgeneral.m4)dnl
+m4_include(acspecific.m4)dnl
+m4_include(acoldnames.m4)dnl
dnl Do not sinclude acsite.m4 here, because it may not be installed
dnl yet when Autoconf is frozen.
dnl Do not sinclude ./aclocal.m4 here, to prevent it from being frozen.
dnl Franc,ois Pinard, Karl Berry, Richard Pixley, Ian Lance Taylor,
dnl Roland McGrath, Noah Friedman, david d zuhn, and many others.
dnl
-divert(-1)dnl Throw away output until AC_INIT is called.
-changequote([, ])
-
-include(acversion.m4)
-
-dnl Some old m4's don't support m4exit. But they provide
-dnl equivalent functionality by core dumping because of the
-dnl long macros we define.
-ifdef([__gnu__], , [errprint(Autoconf requires GNU m4.
-Install it before installing Autoconf or set the
-M4 environment variable to its path name.
-)m4exit(2)])
-
-
-dnl m4_errprint(MSG)
-dnl ----------------
-dnl Same as `errprint', but reports the file and line.
-define(m4_errprint, [errprint(__file__:__line__: [$1
-])])
-
-
-dnl m4_warn(MSG)
-dnl ------------
-dnl Warn the user.
-define(m4_warn, [m4_errprint([warning: $1])])
-
-
-dnl m4_fatal(MSG, [EXIT-STATUS])
-dnl ----------------------------
-dnl Fatal the user. :)
-define(m4_fatal,
-[m4_errprint([error: $1])dnl
-m4exit(ifelse([$2],, 1, [$2]))])
-
-
-dnl Some m4 internals have names colliding with tokens we might use.
-dnl Rename them a` la `m4 --prefix-builtins'.
-define([m4_prefix],
-[define([m4_$1], defn([$1]))
-undefine([$1])])
-
-m4_prefix([eval])
-m4_prefix([shift])
-m4_prefix([format])
-
-
-dnl We also want to neutralize include (and sinclude for symmetry),
-dnl but we want to extend them slightly: warn when a file is included
-dnl several times. This is in general a dangerous operation because
-dnl quite nobody quotes the first argument of define.
-dnl
-dnl For instance in the following case:
-dnl define(foo, [bar])
-dnl then a second reading will turn into
-dnl define(bar, [bar])
-dnl which is certainly not what was meant.
-
-
-dnl m4_include_unique(FILE)
-dnl -----------------------
-dnl Declare that the FILE was loading; and warn if it has already
-dnl been included.
-define(m4_include_unique,
-[ifdef([m4_include($1)],
- [m4_warn([file `$1' included several times])])dnl
-define([m4_include($1)])])
-
-
-dnl m4_include(FILE)
-dnl ----------------
-dnl As the builtin include, but warns against multiple inclusions.
-define(m4_include,
-[m4_include_unique([$1])dnl
-builtin([include], [$1])])
-
-
-dnl m4_sinclude(FILE)
-dnl -----------------
-dnl As the builtin sinclude, but warns against multiple inclusions.
-define(m4_sinclude,
-[m4_include_unique([$1])dnl
-builtin([sinclude], [$1])])
-
-dnl Neutralize include and sinclude.
-undefine([include])
-undefine([sinclude])
-
-dnl ------------------------------------------------------------
-dnl Text processing in m4.
-dnl ------------------------------------------------------------
-
-dnl m4_quote(STRING)
-dnl ----------------
-dnl Return STRING quoted.
-dnl
-dnl It is important to realize the difference between `quote(exp)' and
-dnl `[exp]': in the first case you obtain the quoted *result* of the
-dnl expansion of EXP, while in the latter you just obtain the string
-dnl `exp'.
-define([m4_quote], [[$@]])
-
-
-dnl m4_split(STRING, [REGEXP])
-dnl --------------------------
-dnl Split STRING into an m4 list of quoted elements. The elements are
-dnl quoted with [ and ]. Beginning spaces and end spaces *are kept*.
-dnl Use m4_strip to remove them.
-dnl
-dnl REGEXP specifies where to split. Default is [\t ]+.
-dnl
-dnl Pay attention to the changequotes. Inner changequotes exist for
-dnl obvious reasons (we want to insert square brackets). Outer
-dnl changequotes are needed because otherwise the m4 parser, when it
-dnl sees the closing bracket we add to the result, believes it is the
-dnl end of the body of the macro we define.
-dnl
-dnl Also, notice that $1 is quoted twice, since we want the result to be
-dnl quoted. Then you should understand that the argument of patsubst is
-dnl ``STRING'' (i.e., with additional `` and '').
-dnl
-dnl This macro is safe on active symbols, i.e.:
-dnl define(active, ACTIVE)
-dnl m4_split([active active ])end
-dnl => [active], [active], []end
-changequote(<<, >>)
-define(<<m4_split>>,
-<<changequote(``, '')dnl
-[dnl Can't use m4_default here instead of ifelse, because m4_default uses
-dnl [ and ] as quotes.
-patsubst(````$1'''',
- ifelse(``$2'',, ``[ ]+'', ``$2''),
- ``], ['')]dnl
-changequote([, ])>>)
-changequote([, ])
-
-
-dnl m4_join(STRING)
-dnl ---------------
-dnl If STRING contains end of lines, replace them with spaces. If there
-dnl are backslashed end of lines, remove them. This macro is safe with
-dnl active symbols.
-dnl define(active, ACTIVE)
-dnl m4_join([active
-dnl act\
-dnl ive])end
-dnl => active activeend
-define([m4_join],
-[translit(patsubst([[[$1]]], [\\
-]), [
-], [ ])])
-
-
-dnl m4_strip(STRING)
-dnl ----------------
-dnl Expands into STRING with tabs and spaces singled out into a single
-dnl space, and removing leading and trailing spaces.
-dnl
-dnl This macro is robust to active symbols.
-dnl define(active, ACTIVE)
-dnl m4_strip([ active active ])end
-dnl => active activeend
-dnl
-dnl This macro is fun! Because we want to preserve active symbols, STRING
-dnl must be quoted for each evaluation, which explains there are 4 levels
-dnl of brackets around $1 (don't forget that the result must be quoted
-dnl too, hence one more quoting than applications).
-dnl
-dnl Then notice the patsubst of the middle: it is in charge of removing
-dnl the leading space. Why not just `patsubst(..., [^ ])'? Because this
-dnl macro will receive the output of the preceding patsubst, i.e. more or
-dnl less [[STRING]]. So if there is a leading space in STRING, then it is
-dnl the *third* character, since there are two leading `['; Equally for
-dnl the outer patsubst.
-define([m4_strip],
-[patsubst(patsubst(patsubst([[[[$1]]]],
- [[ ]+], [ ]),
- [^\(..\) ], [\1]),
- [ \(.\)$], [\1])])
-
-
-
-dnl m4_append(MACRO-NAME, STRING)
-dnl -----------------------------
-dnl Redefine MACRO-NAME to hold its former content plus STRING at the
-dnl end. It is valid to use this macro with MACRO-NAME undefined.
-dnl
-dnl This macro is robust to active symbols. It can be used to grow
-dnl strings.
-dnl
-dnl | define(active, ACTIVE)
-dnl | m4_append([sentence], [This is an])
-dnl | m4_append([sentence], [ active ])
-dnl | m4_append([sentence], [symbol.])
-dnl | sentence
-dnl | undefine([active])dnl
-dnl | sentence
-dnl => This is an ACTIVE symbol.
-dnl => This is an active symbol.
-dnl
-dnl It can be used to define hooks.
-dnl
-dnl | define(active, ACTIVE)
-dnl | m4_append([hooks], [define([act1], [act2])])
-dnl | m4_append([hooks], [define([act2], [active])])
-dnl | undefine([active])
-dnl | act1
-dnl | hooks
-dnl | act1
-dnl => act1
-dnl =>
-dnl => active
-define(m4_append,
-[define([$1],
-ifdef([$1], [defn([$1])])[$2])])
-
-
-dnl m4_list_append(MACRO-NAME, STRING)
-dnl ----------------------------------
-dnl Same as `m4_append', but each element is separated by `, '.
-define(m4_list_append,
-[define([$1],
-ifdef([$1], [defn([$1]), ])[$2])])
-
-
-dnl ------------------------------------------------------------
-dnl Some additional m4 structural control.
-dnl ------------------------------------------------------------
-
-dnl Both `ifval' and `ifset' tests against the empty string. The
-dnl difference is that `ifset' is specialized on macros.
-dnl
-dnl In case of arguments of macros, eg $[1], it makes little difference.
-dnl In the case of a macro `FOO', you don't want to check `ifval(FOO,
-dnl TRUE)', because if `FOO' expands with commas, there is a shifting of
-dnl the arguments. So you want to run `ifval([FOO])', but then you just
-dnl compare the *string* `FOO' against `', which, of course fails.
-dnl
-dnl So you want a variation of `ifset' that expects a macro name as $[1].
-dnl If this macro is both defined and defined to a non empty value, then
-dnl it runs TRUE etc.
-
-
-dnl ifval(COND, IF-TRUE[, IF-FALSE])
-dnl --------------------------------
-dnl If COND is not the empty string, expand IF-TRUE, otherwise IF-FALSE.
-dnl Comparable to ifdef.
-define([ifval], [ifelse([$1],[],[$3],[$2])])
-
-
-dnl ifset(MACRO, IF-TRUE[, IF-FALSE])
-dnl --------------------------------
-dnl If MACRO has no definition, or of its definition is the empty string,
-dnl expand IF-FALSE, otherwise IF-TRUE.
-define([ifset],
-[ifdef([$1],
- [ifelse(defn([$1]), [], [$3], [$2])],
- [$3])])
-
-
-dnl m4_default(EXP1, EXP2)
-dnl ----------------------
-dnl Returns EXP1 if non empty, otherwise EXP2.
-define([m4_default], [ifval([$1], [$1], [$2])])
-
-
-# m4_case(SWITCH, VAL1, IF-VAL1, VAL2, IF-VAL2, ..., DEFAULT)
-# -----------------------------------------------------------
-# m4 equivalent of
-# switch (SWITCH)
-# {
-# case VAL1:
-# IF-VAL1;
-# break;
-# case VAL2:
-# IF-VAL2;
-# break;
-# ...
-# default:
-# DEFAULT;
-# break;
-# }.
-# All the values are optional, and the macro is robust to active
-# symbols properly quoted.
-define(m4_case,
-[ifelse([$#], 0, [],
- [$#], 1, [],
- [$#], 2, [$2],
- [$1], [$2], [$3],
- [m4_case([$1], m4_shift(m4_shift(m4_shift($@))))])])
-
-
-# m4_match(SWITCH, RE1, VAL1, RE2, VAL2, ..., DEFAULT)
-# ----------------------------------------------------
-# m4 equivalent of
-#
-# if (SWITCH =~ RE1)
-# VAL1;
-# elif (SWITCH =~ RE2)
-# VAL2;
-# elif ...
-# ...
-# else
-# DEFAULT
-#
-# All the values are optional, and the macro is robust to active symbols
-# properly quoted.
-define(m4_match,
-[ifelse([$#], 0, [],
- [$#], 1, [],
- [$#], 2, [$2],
- regexp([$1], [$2]), -1, [m4_match([$1],
- m4_shift(m4_shift(m4_shift($@))))],
- [$3])])
-
-
-## --------------------- ##
-## Implementing m4 loops ##
-## --------------------- ##
-
-
-# Implementing loops (`foreach' loops) in m4 is much more tricky than it
-# may seem. Actually, the example of a `foreach' loop in the m4
-# documentation is wrong: it does not quote the arguments properly,
-# which leads to undesired expansions.
-#
-# The example in the documentation is:
-#
-# | # foreach(x, (item_1, item_2, ..., item_n), stmt)
-# | define(`foreach',
-# | `pushdef(`$1', `')_foreach(`$1', `$2', `$3')popdef(`$1')')
-# | define(`_arg1', `$1')
-# | define(`_foreach',
-# | `ifelse(`$2', `()', ,
-# | `define(`$1', _arg1$2)$3`'_foreach(`$1', (shift$2), `$3')')')
-#
-# But then if you run
-#
-# | define(a, 1)
-# | define(b, 2)
-# | define(c, 3)
-# | foreach(`f', `(`a', `(b', `c)')', `echo f
-# | ')
-#
-# it gives
-#
-# => echo 1
-# => echo (2,3)
-#
-# which is not what is expected.
-#
-# Once you understood this, you turn yourself into a quoting wizard,
-# and come up with the following solution:
-#
-# | # foreach(x, (item_1, item_2, ..., item_n), stmt)
-# | define(`foreach', `pushdef(`$1', `')_foreach($@)popdef(`$1')')
-# | define(`_arg1', ``$1'')
-# | define(`_foreach',
-# | `ifelse($2, `()', ,
-# | `define(`$1', `_arg1$2')$3`'_foreach(`$1', `(shift$2)', `$3')')')
-#
-# which this time answers
-#
-# => echo a
-# => echo (b
-# => echo c)
-#
-# Bingo!
-
-
-# m4_foreach(VARIABLE, LIST, EXPRESSION)
-# --------------------------------------
-# Expand EXPRESSION assigning to VARIABLE each value of the LIST
-# (LIST should have the form `[(item_1, item_2, ..., item_n)]'),
-# i.e. the whole list should be *quoted*. Quote members too if
-# you don't want them to be expanded.
-#
-# This macro is robust to active symbols:
-# define(active, ACTIVE)
-# m4_foreach([Var], [([active], [b], [active])], [-Var-])end
-# => -active--b--active-end
-define(m4_foreach,
-[pushdef([$1], [])_m4_foreach($@)popdef([$1])])
-
-dnl Low level macros used to define m4_foreach
-define(m4_car, [[$1]])
-define(_m4_foreach,
-[ifelse($2, [()], ,
- [define([$1], [m4_car$2])$3[]_m4_foreach([$1],
- [(m4_shift$2)],
- [$3])])])
-
-
-
dnl ### Defining macros
[indir([$1], m4_shift($@))])])
-dnl ## --------------------------------- ##
-dnl ## Helping macros to display strings ##
-dnl ## --------------------------------- ##
-
-
-dnl AC_WRAP(STRING [, PREFIX[, FIRST-PREFIX[, WIDTH]]]]))
-dnl -----------------------------------------------------
-dnl Expands into STRING wrapped to hold in WIDTH columns (default = 79).
-dnl If prefix is set, each line is prefixed with it. If FIRST-PREFIX is
-dnl specified, then the first line is prefixed with it. As a special
-dnl case, if the length of the first prefix is greater than that of
-dnl PREFIX, then FIRST-PREFIX will be left alone on the first line.
-dnl
-dnl Typical outputs are:
-dnl
-dnl AC_WRAP([Short string */], [ ], [/* ], 20)
-dnl => /* Short string */
-dnl
-dnl AC_WRAP([Much longer string */], [ ], [/* ], 20)
-dnl => /* Much longer
-dnl => string */
-dnl
-dnl AC_WRAP([Short doc.], [ ], [ --short ], 30)
-dnl => --short Short doc.
-dnl
-dnl AC_WRAP([Short doc.], [ ], [ --too-wide ], 30)
-dnl => --too-wide
-dnl => Short doc.
-dnl
-dnl AC_WRAP([Super long documentation.], [ ], [ --too-wide ], 30)
-dnl => --too-wide
-dnl => Super long
-dnl => documentation.
-dnl
-dnl FIXME: there is no checking of a longer PREFIX than WIDTH, but do
-dnl we really want to bother with people trying each single corner
-dnl of a software?
-dnl
-dnl This macro does not leave a trailing space behind the last word,
-dnl what complicates it a bit. The algorithm is stupid simple: all the
-dnl words are preceded by AC_Separator which is defined to empty for the
-dnl first word, and then ` ' (single space) for all the others.
-define([AC_WRAP],
-[pushdef([AC_Prefix], m4_default([$2], []))dnl
-pushdef([AC_Prefix1], m4_default([$3], [AC_Prefix]))dnl
-pushdef([AC_Width], m4_default([$4], 79))dnl
-pushdef([AC_Cursor], len(AC_Prefix1))dnl
-pushdef([AC_Separator], [])dnl
-AC_Prefix1[]dnl
-ifelse(m4_eval(AC_Cursor > len(AC_Prefix)),
- 1, [define([AC_Cursor], len(AC_Prefix))
-AC_Prefix])[]dnl
-AC_FOREACH([AC_Word], [$1],
-[define([AC_Cursor], m4_eval(AC_Cursor + len(AC_Word) + 1))dnl
-dnl New line if too long, else insert a space unless it is the first
-dnl of the words.
-ifelse(m4_eval(AC_Cursor > AC_Width),
- 1, [define([AC_Cursor], m4_eval(len(AC_Prefix) + len(AC_Word) + 1))]
-AC_Prefix,
- [AC_Separator])[]dnl
-AC_Word[]dnl
-define([AC_Separator], [ ])])dnl
-popdef([AC_Separator])dnl
-popdef([AC_Cursor])dnl
-popdef([AC_Width])dnl
-popdef([AC_Prefix1])dnl
-popdef([AC_Prefix])dnl
-])
+## --------------------------------- ##
+## Helping macros to display strings ##
+## --------------------------------- ##
dnl AC_HELP_STRING(LHS, RHS[, COLUMN])
define([AC_HELP_STRING],
[pushdef([AC_Prefix], m4_default([$3], [ ]))dnl
pushdef([AC_Prefix_Format], [ %-]m4_eval(len(AC_Prefix) - 3)[s ])dnl [ %-23s ]
-AC_WRAP([$2], AC_Prefix, m4_format(AC_Prefix_Format, [$1]))dnl
+m4_wrap([$2], AC_Prefix, m4_format(AC_Prefix_Format, [$1]))dnl
popdef([AC_Prefix_Format])dnl
popdef([AC_Prefix])dnl
])
dnl --------------
AC_DEFUN(AC_INIT_NOTICE,
[# Guess values for system-dependent variables and create Makefiles.
-# Generated automatically using Autoconf version] AC_ACVERSION [
+# Generated automatically using Autoconf version ]AC_ACVERSION[
# Copyright (C) 1992, 93, 94, 95, 96, 98, 1999 Free Software Foundation, Inc.
#
# This configure script is free software; the Free Software Foundation
# Files that config.status was made for.
ifset([AC_LIST_FILES], [config_files="\\
-AC_WRAP(AC_LIST_FILES, [ ])"
+m4_wrap(AC_LIST_FILES, [ ])"
])dnl
ifset([AC_LIST_HEADERS], [config_headers="\\
-AC_WRAP(AC_LIST_HEADERS, [ ])"
+m4_wrap(AC_LIST_HEADERS, [ ])"
])dnl
ifset([AC_LIST_LINKS], [config_links="\\
-AC_WRAP(AC_LIST_LINKS, [ ])"
+m4_wrap(AC_LIST_LINKS, [ ])"
])dnl
ifset([AC_LIST_COMMANDS], [config_commands="\\
-AC_WRAP(AC_LIST_COMMANDS, [ ])"
+m4_wrap(AC_LIST_COMMANDS, [ ])"
])dnl
ac_cs_usage="\\
--- /dev/null
+divert(-1) -*- Autoconf -*-
+# This file is part of Autoconf.
+# Base m4 layer.
+# Requires GNU m4.
+# Copyright (C) 1999 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
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+# 02111-1307, USA.
+#
+# As a special exception, the Free Software Foundation gives unlimited
+# permission to copy, distribute and modify the configure scripts that
+# are the output of Autoconf. You need not follow the terms of the GNU
+# General Public License when using or distributing such scripts, even
+# though portions of the text of Autoconf appear in them. The GNU
+# General Public License (GPL) does govern all other use of the material
+# that constitutes the Autoconf program.
+#
+# Certain portions of the Autoconf source text are designed to be copied
+# (in certain cases, depending on the input) into the output of
+# Autoconf. We call these the "data" portions. The rest of the Autoconf
+# source text consists of comments plus executable code that decides which
+# of the data portions to output in any given case. We call these
+# comments and executable code the "non-data" portions. Autoconf never
+# copies any of the non-data portions into its output.
+#
+# This special exception to the GPL applies to versions of Autoconf
+# released by the Free Software Foundation. When you make and
+# distribute a modified version of Autoconf, you may extend this special
+# exception to the GPL to apply to your modified version as well, *unless*
+# your modified version has the potential to copy into its output some
+# of the text that was the non-data portion of the version that you started
+# with. (In other words, unless your change moves or copies text from
+# the non-data portions to the data portions.) If your modification has
+# such potential, you must delete any notice of this special exception
+# to the GPL from your modified version.
+#
+# Written by Akim Demaille.
+#
+
+changequote([, ])
+
+# Some old m4's don't support m4exit. But they provide
+# equivalent functionality by core dumping because of the
+# long macros we define.
+ifdef([__gnu__], ,
+[errprint(Autoconf requires GNU m4. Install it before installing Autoconf or
+set the M4 environment variable to its path name.)
+m4exit(2)])
+
+## --------------------------------------------- ##
+## Move some m4 builtins to a safer name space. ##
+## --------------------------------------------- ##
+
+# m4_errprint(MSG)
+# ----------------
+# Same as `errprint', but reports the file and line.
+define(m4_errprint, [errprint(__file__:__line__: [$1
+])])
+
+
+# m4_warn(MSG)
+# ------------
+# Warn the user.
+define(m4_warn, [m4_errprint([warning: $1])])
+
+
+# m4_fatal(MSG, [EXIT-STATUS])
+# ----------------------------
+# Fatal the user. :)
+define(m4_fatal,
+[m4_errprint([error: $1])dnl
+m4exit(ifelse([$2],, 1, [$2]))])
+
+
+# Some m4 internals have names colliding with tokens we might use.
+# Rename them a` la `m4 --prefix-builtins'.
+define([m4_prefix],
+[define([m4_$1], defn([$1]))
+undefine([$1])])
+
+m4_prefix([eval])
+m4_prefix([shift])
+m4_prefix([format])
+
+
+# We also want to neutralize include (and sinclude for symmetry),
+# but we want to extend them slightly: warn when a file is included
+# several times. This is in general a dangerous operation because
+# quite nobody quotes the first argument of define.
+#
+# For instance in the following case:
+# define(foo, [bar])
+# then a second reading will turn into
+# define(bar, [bar])
+# which is certainly not what was meant.
+
+
+# m4_include_unique(FILE)
+# -----------------------
+# Declare that the FILE was loading; and warn if it has already
+# been included.
+define(m4_include_unique,
+[ifdef([m4_include($1)],
+ [m4_warn([file `$1' included several times])])dnl
+define([m4_include($1)])])
+
+
+# m4_include(FILE)
+# ----------------
+# As the builtin include, but warns against multiple inclusions.
+define(m4_include,
+[m4_include_unique([$1])dnl
+builtin([include], [$1])])
+
+
+# m4_sinclude(FILE)
+# -----------------
+# As the builtin sinclude, but warns against multiple inclusions.
+define(m4_sinclude,
+[m4_include_unique([$1])dnl
+builtin([sinclude], [$1])])
+
+# Neutralize include and sinclude.
+undefine([include])
+undefine([sinclude])
+
+
+## --------------------------------------- ##
+## Some additional m4 structural control. ##
+## --------------------------------------- ##
+
+# Both `ifval' and `ifset' tests against the empty string. The
+# difference is that `ifset' is specialized on macros.
+#
+# In case of arguments of macros, eg $[1], it makes little difference.
+# In the case of a macro `FOO', you don't want to check `ifval(FOO,
+# TRUE)', because if `FOO' expands with commas, there is a shifting of
+# the arguments. So you want to run `ifval([FOO])', but then you just
+# compare the *string* `FOO' against `', which, of course fails.
+#
+# So you want a variation of `ifset' that expects a macro name as $[1].
+# If this macro is both defined and defined to a non empty value, then
+# it runs TRUE etc.
+
+
+# ifval(COND, IF-TRUE[, IF-FALSE])
+# --------------------------------
+# If COND is not the empty string, expand IF-TRUE, otherwise IF-FALSE.
+# Comparable to ifdef.
+define([ifval], [ifelse([$1],[],[$3],[$2])])
+
+
+# ifset(MACRO, IF-TRUE[, IF-FALSE])
+# --------------------------------
+# If MACRO has no definition, or of its definition is the empty string,
+# expand IF-FALSE, otherwise IF-TRUE.
+define([ifset],
+[ifdef([$1],
+ [ifelse(defn([$1]), [], [$3], [$2])],
+ [$3])])
+
+
+# m4_default(EXP1, EXP2)
+# ----------------------
+# Returns EXP1 if non empty, otherwise EXP2.
+define([m4_default], [ifval([$1], [$1], [$2])])
+
+
+# m4_case(SWITCH, VAL1, IF-VAL1, VAL2, IF-VAL2, ..., DEFAULT)
+# -----------------------------------------------------------
+# m4 equivalent of
+# switch (SWITCH)
+# {
+# case VAL1:
+# IF-VAL1;
+# break;
+# case VAL2:
+# IF-VAL2;
+# break;
+# ...
+# default:
+# DEFAULT;
+# break;
+# }.
+# All the values are optional, and the macro is robust to active
+# symbols properly quoted.
+define(m4_case,
+[ifelse([$#], 0, [],
+ [$#], 1, [],
+ [$#], 2, [$2],
+ [$1], [$2], [$3],
+ [m4_case([$1], m4_shift(m4_shift(m4_shift($@))))])])
+
+
+# m4_match(SWITCH, RE1, VAL1, RE2, VAL2, ..., DEFAULT)
+# ----------------------------------------------------
+# m4 equivalent of
+#
+# if (SWITCH =~ RE1)
+# VAL1;
+# elif (SWITCH =~ RE2)
+# VAL2;
+# elif ...
+# ...
+# else
+# DEFAULT
+#
+# All the values are optional, and the macro is robust to active symbols
+# properly quoted.
+define(m4_match,
+[ifelse([$#], 0, [],
+ [$#], 1, [],
+ [$#], 2, [$2],
+ regexp([$1], [$2]), -1, [m4_match([$1],
+ m4_shift(m4_shift(m4_shift($@))))],
+ [$3])])
+
+
+## --------------------- ##
+## Implementing m4 loops ##
+## --------------------- ##
+
+
+# Implementing loops (`foreach' loops) in m4 is much more tricky than it
+# may seem. Actually, the example of a `foreach' loop in the m4
+# documentation is wrong: it does not quote the arguments properly,
+# which leads to undesired expansions.
+#
+# The example in the documentation is:
+#
+# | # foreach(x, (item_1, item_2, ..., item_n), stmt)
+# | define(`foreach',
+# | `pushdef(`$1', `')_foreach(`$1', `$2', `$3')popdef(`$1')')
+# | define(`_arg1', `$1')
+# | define(`_foreach',
+# | `ifelse(`$2', `()', ,
+# | `define(`$1', _arg1$2)$3`'_foreach(`$1', (shift$2), `$3')')')
+#
+# But then if you run
+#
+# | define(a, 1)
+# | define(b, 2)
+# | define(c, 3)
+# | foreach(`f', `(`a', `(b', `c)')', `echo f
+# | ')
+#
+# it gives
+#
+# => echo 1
+# => echo (2,3)
+#
+# which is not what is expected.
+#
+# Once you understood this, you turn yourself into a quoting wizard,
+# and come up with the following solution:
+#
+# | # foreach(x, (item_1, item_2, ..., item_n), stmt)
+# | define(`foreach', `pushdef(`$1', `')_foreach($@)popdef(`$1')')
+# | define(`_arg1', ``$1'')
+# | define(`_foreach',
+# | `ifelse($2, `()', ,
+# | `define(`$1', `_arg1$2')$3`'_foreach(`$1', `(shift$2)', `$3')')')
+#
+# which this time answers
+#
+# => echo a
+# => echo (b
+# => echo c)
+#
+# Bingo!
+
+
+# m4_foreach(VARIABLE, LIST, EXPRESSION)
+# --------------------------------------
+# Expand EXPRESSION assigning to VARIABLE each value of the LIST
+# (LIST should have the form `[(item_1, item_2, ..., item_n)]'),
+# i.e. the whole list should be *quoted*. Quote members too if
+# you don't want them to be expanded.
+#
+# This macro is robust to active symbols:
+# define(active, ACTIVE)
+# m4_foreach([Var], [([active], [b], [active])], [-Var-])end
+# => -active--b--active-end
+define(m4_foreach,
+[pushdef([$1], [])_m4_foreach($@)popdef([$1])])
+
+# Low level macros used to define m4_foreach
+define(m4_car, [[$1]])
+define(_m4_foreach,
+[ifelse($2, [()], ,
+ [define([$1], [m4_car$2])$3[]_m4_foreach([$1],
+ [(m4_shift$2)],
+ [$3])])])
+
+
+## ----------------------- ##
+## Text processing in m4. ##
+## ----------------------- ##
+
+# m4_quote(STRING)
+# ----------------
+# Return STRING quoted.
+#
+# It is important to realize the difference between `quote(exp)' and
+# `[exp]': in the first case you obtain the quoted *result* of the
+# expansion of EXP, while in the latter you just obtain the string
+# `exp'.
+define([m4_quote], [[$@]])
+
+
+# m4_split(STRING, [REGEXP])
+# --------------------------
+# Split STRING into an m4 list of quoted elements. The elements are
+# quoted with [ and ]. Beginning spaces and end spaces *are kept*.
+# Use m4_strip to remove them.
+#
+# REGEXP specifies where to split. Default is [\t ]+.
+#
+# Pay attention to the changequotes. Inner changequotes exist for
+# obvious reasons (we want to insert square brackets). Outer
+# changequotes are needed because otherwise the m4 parser, when it
+# sees the closing bracket we add to the result, believes it is the
+# end of the body of the macro we define.
+#
+# Also, notice that $1 is quoted twice, since we want the result to be
+# quoted. Then you should understand that the argument of patsubst is
+# ``STRING'' (i.e., with additional `` and '').
+#
+# This macro is safe on active symbols, i.e.:
+# define(active, ACTIVE)
+# m4_split([active active ])end
+# => [active], [active], []end
+changequote(<<, >>)
+define(<<m4_split>>,
+<<changequote(``, '')dnl
+[dnl Can't use m4_default here instead of ifelse, because m4_default uses
+dnl [ and ] as quotes.
+patsubst(````$1'''',
+ ifelse(``$2'',, ``[ ]+'', ``$2''),
+ ``], ['')]dnl
+changequote([, ])>>)
+changequote([, ])
+
+
+# m4_join(STRING)
+# ---------------
+# If STRING contains end of lines, replace them with spaces. If there
+# are backslashed end of lines, remove them. This macro is safe with
+# active symbols.
+# define(active, ACTIVE)
+# m4_join([active
+# act\
+# ive])end
+# => active activeend
+define([m4_join],
+[translit(patsubst([[[$1]]], [\\
+]), [
+], [ ])])
+
+
+# m4_strip(STRING)
+# ----------------
+# Expands into STRING with tabs and spaces singled out into a single
+# space, and removing leading and trailing spaces.
+#
+# This macro is robust to active symbols.
+# define(active, ACTIVE)
+# m4_strip([ active active ])end
+# => active activeend
+#
+# This macro is fun! Because we want to preserve active symbols, STRING
+# must be quoted for each evaluation, which explains there are 4 levels
+# of brackets around $1 (don't forget that the result must be quoted
+# too, hence one more quoting than applications).
+#
+# Then notice the patsubst of the middle: it is in charge of removing
+# the leading space. Why not just `patsubst(..., [^ ])'? Because this
+# macro will receive the output of the preceding patsubst, i.e. more or
+# less [[STRING]]. So if there is a leading space in STRING, then it is
+# the *third* character, since there are two leading `['; Equally for
+# the outer patsubst.
+define([m4_strip],
+[patsubst(patsubst(patsubst([[[[$1]]]],
+ [[ ]+], [ ]),
+ [^\(..\) ], [\1]),
+ [ \(.\)$], [\1])])
+
+
+
+# m4_append(MACRO-NAME, STRING)
+# -----------------------------
+# Redefine MACRO-NAME to hold its former content plus STRING at the
+# end. It is valid to use this macro with MACRO-NAME undefined.
+#
+# This macro is robust to active symbols. It can be used to grow
+# strings.
+#
+# | define(active, ACTIVE)
+# | m4_append([sentence], [This is an])
+# | m4_append([sentence], [ active ])
+# | m4_append([sentence], [symbol.])
+# | sentence
+# | undefine([active])dnl
+# | sentence
+# => This is an ACTIVE symbol.
+# => This is an active symbol.
+#
+# It can be used to define hooks.
+#
+# | define(active, ACTIVE)
+# | m4_append([hooks], [define([act1], [act2])])
+# | m4_append([hooks], [define([act2], [active])])
+# | undefine([active])
+# | act1
+# | hooks
+# | act1
+# => act1
+# =>
+# => active
+define(m4_append,
+[define([$1],
+ifdef([$1], [defn([$1])])[$2])])
+
+
+# m4_list_append(MACRO-NAME, STRING)
+# ----------------------------------
+# Same as `m4_append', but each element is separated by `, '.
+define(m4_list_append,
+[define([$1],
+ifdef([$1], [defn([$1]), ])[$2])])
+
+
+
+
+## --------------------------------- ##
+## Helping macros to display strings ##
+## --------------------------------- ##
+
+
+# m4_wrap(STRING, [PREFIX], [FIRST-PREFIX], [WIDTH])
+# --------------------------------------------------
+# Expands into STRING wrapped to hold in WIDTH columns (default = 79).
+# If prefix is set, each line is prefixed with it. If FIRST-PREFIX is
+# specified, then the first line is prefixed with it. As a special
+# case, if the length of the first prefix is greater than that of
+# PREFIX, then FIRST-PREFIX will be left alone on the first line.
+#
+# Typical outputs are:
+#
+# m4_wrap([Short string */], [ ], [/* ], 20)
+# => /* Short string */
+#
+# m4_wrap([Much longer string */], [ ], [/* ], 20)
+# => /* Much longer
+# => string */
+#
+# m4_wrap([Short doc.], [ ], [ --short ], 30)
+# => --short Short doc.
+#
+# m4_wrap([Short doc.], [ ], [ --too-wide ], 30)
+# => --too-wide
+# => Short doc.
+#
+# m4_wrap([Super long documentation.], [ ], [ --too-wide ], 30)
+# => --too-wide
+# => Super long
+# => documentation.
+#
+# FIXME: there is no checking of a longer PREFIX than WIDTH, but do
+# we really want to bother with people trying each single corner
+# of a software?
+#
+# This macro does not leave a trailing space behind the last word,
+# what complicates it a bit. The algorithm is stupid simple: all the
+# words are preceded by m4_Separator which is defined to empty for the
+# first word, and then ` ' (single space) for all the others.
+define([m4_wrap],
+[pushdef([m4_Prefix], m4_default([$2], []))dnl
+pushdef([m4_Prefix1], m4_default([$3], [m4_Prefix]))dnl
+pushdef([m4_Width], m4_default([$4], 79))dnl
+pushdef([m4_Cursor], len(m4_Prefix1))dnl
+pushdef([m4_Separator], [])dnl
+m4_Prefix1[]dnl
+ifelse(m4_eval(m4_Cursor > len(m4_Prefix)),
+ 1, [define([m4_Cursor], len(m4_Prefix))
+m4_Prefix])[]dnl
+m4_foreach([m4_Word], (m4_split(m4_strip(m4_join([$1])))),
+[define([m4_Cursor], m4_eval(m4_Cursor + len(m4_Word) + 1))dnl
+dnl New line if too long, else insert a space unless it is the first
+dnl of the words.
+ifelse(m4_eval(m4_Cursor > m4_Width),
+ 1, [define([m4_Cursor], m4_eval(len(m4_Prefix) + len(m4_Word) + 1))]
+m4_Prefix,
+ [m4_Separator])[]dnl
+m4_Word[]dnl
+define([m4_Separator], [ ])])dnl
+popdef([m4_Separator])dnl
+popdef([m4_Cursor])dnl
+popdef([m4_Width])dnl
+popdef([m4_Prefix1])dnl
+popdef([m4_Prefix])dnl
+])
projects / thirdparty / autoconf.git / commitdiff
