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(AC_VAR_SET_IFELSE, AC_VAR_PUSHDEF and AC_VAR_POPDEF, AC_TR_CPP) (AC_TR_SH): Move as... * m4sh.m4 (AS_VAR_SET, AS_VAR_GET, AS_VAR_TEST_SET) (AS_VAR_SET_IF, AC_VAR_PUSHDEF, AS_VAR_POPDEF, AS_TR_CPP) (AS_TR_SH): these. (_AS_TR_PREPARE, _AS_CR_PREPARE, _AS_TR_CPP_PREPARE) (_AS_TR_SH_PREPARE): New. (AS_SHELL_SANITIZE): Invoke _AS_TR_PREPARE. * tests/aclocal.m4 (AC_STATE_SAVE): `as_' vars can be modified.
730 lines
21 KiB
Plaintext
730 lines
21 KiB
Plaintext
include(m4sugar.m4)# -*- Autoconf -*-
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# This file is part of Autoconf.
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# M4 sugar for common shell constructs.
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# Requires GNU M4 and M4sugar.
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# Copyright 2000, 2001 Free Software Foundation, Inc.
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#
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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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# the Free Software Foundation; either version 2, or (at your option)
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# any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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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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# 02111-1307, USA.
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#
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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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# are the output of Autoconf. You need not follow the terms of the GNU
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# General Public License when using or distributing such scripts, even
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# though portions of the text of Autoconf appear in them. The GNU
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# General Public License (GPL) does govern all other use of the material
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# that constitutes the Autoconf program.
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#
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# Certain portions of the Autoconf source text are designed to be copied
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# (in certain cases, depending on the input) into the output of
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# Autoconf. We call these the "data" portions. The rest of the Autoconf
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# source text consists of comments plus executable code that decides which
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# of the data portions to output in any given case. We call these
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# comments and executable code the "non-data" portions. Autoconf never
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# copies any of the non-data portions into its output.
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#
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# This special exception to the GPL applies to versions of Autoconf
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# released by the Free Software Foundation. When you make and
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# distribute a modified version of Autoconf, you may extend this special
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# exception to the GPL to apply to your modified version as well, *unless*
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# your modified version has the potential to copy into its output some
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# of the text that was the non-data portion of the version that you started
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# with. (In other words, unless your change moves or copies text from
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# the non-data portions to the data portions.) If your modification has
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# such potential, you must delete any notice of this special exception
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# to the GPL from your modified version.
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#
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# Written by Akim Demaille, Pavel Roskin, Alexandre Oliva, Lars J. Aas
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# and many other people.
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## ------------------------- ##
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## 1. Sanitizing the shell. ##
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## ------------------------- ##
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# AS_SHELL_SANITIZE
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# -----------------
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# Try to be as Bourne and/or POSIX as possible.
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m4_defun([AS_SHELL_SANITIZE],
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[# Be Bourne compatible
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if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
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emulate sh
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NULLCMD=:
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elif test -n "${BASH_VERSION+set}" && (set -o posix) >/dev/null 2>&1; then
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set -o posix
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fi
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# Name of the executable.
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dnl Moved here because the tests below can use AC_MSG_ERROR, which uses $as_me
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as_me=`AS_BASENAME($[0])`
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_AS_EXPR_PREPARE
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_AS_LN_S_PREPARE
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_AS_TEST_PREPARE
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_AS_UNSET_PREPARE
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_AS_TR_PREPARE
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# NLS nuisances.
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AS_UNSET([LANG], [C])
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AS_UNSET([LC_ALL], [C])
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AS_UNSET([LC_TIME], [C])
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AS_UNSET([LC_CTYPE], [C])
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AS_UNSET([LANGUAGE], [C])
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AS_UNSET([LC_COLLATE], [C])
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AS_UNSET([LC_NUMERIC], [C])
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AS_UNSET([LC_MESSAGES], [C])
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# IFS
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# We need space, tab and new line, in precisely that order.
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as_nl='
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'
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IFS=" $as_nl"
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# CDPATH.
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AS_UNSET([CDPATH], [:])
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])
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## ----------------------------- ##
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## 2. Wrappers around builtins. ##
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## ----------------------------- ##
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# This section is lexicographically sorted.
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# AS_EXIT([EXIT-CODE = 1])
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# ------------------------
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# Exit and set exit code to EXIT-CODE in the way that it's seen
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# within "trap 0".
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#
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# We cannot simply use "exit N" because some shells (zsh and Solaris sh)
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# will not set $? to N while running the code set by "trap 0"
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# So we set $? by executing "exit N" in the subshell and then exit.
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# Other shells don't use `$?' as default for `exit', hence just repeating
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# the exit value can only help improving portability.
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m4_define([AS_EXIT],
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[{ (exit m4_default([$1], 1)); exit m4_default([$1], 1); }])
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# AS_IF(TEST, [IF-TRUE], [IF-FALSE])
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# ----------------------------------
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# Expand into
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# | if TEST; then
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# | IF-TRUE
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# | else
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# | IF-FALSE
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# | fi
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# with simplifications is IF-TRUE and/or IF-FALSE is empty.
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m4_define([AS_IF],
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[m4_ifval([$2$3],
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[if $1; then
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m4_ifval([$2], [$2], :)
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m4_ifvaln([$3],
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[else
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$3])dnl
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fi
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])dnl
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])# AS_IF
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# _AS_UNSET_PREPARE
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# -----------------
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# AS_UNSET depends upon $as_unset: compute it.
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m4_defun([_AS_UNSET_PREPARE],
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[# Support unset when possible.
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if (FOO=FOO; unset FOO) >/dev/null 2>&1; then
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as_unset=unset
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else
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as_unset=false
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fi
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])
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# AS_UNSET(VAR, [VALUE-IF-UNSET-NOT-SUPPORTED = `'])
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# --------------------------------------------------
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# Try to unset the env VAR, otherwise set it to
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# VALUE-IF-UNSET-NOT-SUPPORTED. `as_unset' must have been computed.
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m4_defun([AS_UNSET],
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[m4_require([_AS_UNSET_PREPARE])dnl
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$as_unset $1 || test "${$1+set}" != set || { $1=$2; export $1; }])
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## ------------------------------------------ ##
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## 3. Error and warnings at the shell level. ##
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## ------------------------------------------ ##
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# If AS_MESSAGE_LOG_FD is defined, shell messages are duplicated there
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# too.
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# AS_ESCAPE(STRING, [CHARS = $"'\])
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# ---------------------------------
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# Escape the CHARS in STRING.
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m4_define([AS_ESCAPE],
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[m4_patsubst([$1],
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m4_ifval([$2], [[\([$2]\)]], [[\([\"$`]\)]]),
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[\\\1])])
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# _AS_QUOTE_IFELSE(STRING, IF-MODERN-QUOTATION, IF-OLD-QUOTATION)
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# ---------------------------------------------------------------
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# Compatibility glue between the old AS_MSG suite which did not
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# quote anything, and the modern suite which quotes the quotes.
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# If STRING contains `\\' or `\$', it's modern.
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# If STRING contains `\"' or `\`', it's old.
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# Otherwise it's modern.
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# We use two quotes in the pattern to keep highlighting tools at peace.
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m4_define([_AS_QUOTE_IFELSE],
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[m4_if(m4_regexp([$1], [\\[\\$]]),
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[-1], [m4_if(m4_regexp([$1], [\\[`""]]),
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[-1], [$2],
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[$3])],
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[$2])])
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# _AS_ECHO_UNQUOTED(STRING, [FD = AS_MESSAGE_FD])
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# -----------------------------------------------
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# Perform shell expansions on STRING and echo the string to FD.
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m4_define([_AS_ECHO_UNQUOTED],
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[echo "$1" >&m4_default([$2], [AS_MESSAGE_FD])])
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# _AS_QUOTE(STRING)
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# -----------------
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# If there are quoted (via backslash) backquotes do nothing, else
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# backslash all the quotes.
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# FIXME: In a distant future (2.51 or +), this warning should be
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# classified as `syntax'. It is classified as `obsolete' to ease
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# the transition (for Libtool for instance).
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m4_define([_AS_QUOTE],
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[_AS_QUOTE_IFELSE([$1],
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[AS_ESCAPE([$1], [`""])],
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[m4_warn([obsolete],
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[back quotes and double quotes should not be escaped in: $1])dnl
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$1])])
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# _AS_ECHO(STRING, [FD = AS_FD_MSG])
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# ----------------------------------
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# Protect STRING from backquote expansion, echo the result to FD.
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m4_define([_AS_ECHO],
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[_AS_ECHO_UNQUOTED([_AS_QUOTE([$1])], [$2])])
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# AS_MESSAGE(STRING, [FD = AS_MESSAGE_FD])
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# ----------------------------------------
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m4_define([AS_MESSAGE],
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[m4_ifset([AS_MESSAGE_LOG_FD],
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[{ _AS_ECHO([$as_me:__oline__: $1], [AS_MESSAGE_LOG_FD])
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_AS_ECHO([$as_me: $1], [$2]);}],
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[_AS_ECHO([$as_me: $1], [$2])])[]dnl
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])
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# AS_WARN(PROBLEM)
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# ----------------
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m4_define([AS_WARN],
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[AS_MESSAGE([WARNING: $1], [2])])# AS_WARN
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# AS_ERROR(ERROR, [EXIT-STATUS = 1])
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# ----------------------------------
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m4_define([AS_ERROR],
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[{ AS_MESSAGE([error: $1], [2])
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AS_EXIT([$2]); }[]dnl
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])# AS_ERROR
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## -------------------------------------- ##
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## 4. Portable versions of common tools. ##
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## -------------------------------------- ##
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# This section is lexicographically sorted.
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# AS_DIRNAME(PATHNAME)
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# --------------------
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# Simulate running `dirname(1)' on PATHNAME, not all systems have it.
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# This macro must be usable from inside ` `.
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#
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# Prefer expr to echo|sed, since expr is usually faster and it handles
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# backslashes and newlines correctly. However, older expr
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# implementations (e.g. SunOS 4 expr and Solaris 8 /usr/ucb/expr) have
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# a silly length limit that causes expr to fail if the matched
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# substring is longer than 120 bytes. So fall back on echo|sed if
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# expr fails.
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#
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# FIXME: Please note the following m4_require is quite wrong: if the first
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# occurrence of AS_DIRNAME_EXPR is in a backquoted expression, the
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# shell will be lost. We might have to introduce diversions for
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# setting up an M4sh script: required macros will then be expanded there.
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m4_defun([AS_DIRNAME_EXPR],
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[m4_require([_AS_EXPR_PREPARE])dnl
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$as_expr X[]$1 : 'X\(.*[[^/]]\)//*[[^/][^/]]*/*$' \| \
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X[]$1 : 'X\(//\)[[^/]]' \| \
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X[]$1 : 'X\(//\)$' \| \
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X[]$1 : 'X\(/\)' \| \
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. : '\(.\)'])
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m4_defun([AS_DIRNAME_SED],
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[echo X[]$1 |
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sed ['/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{ s//\1/; q; }
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/^X\(\/\/\)[^/].*/{ s//\1/; q; }
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/^X\(\/\/\)$/{ s//\1/; q; }
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/^X\(\/\).*/{ s//\1/; q; }
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s/.*/./; q']])
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m4_defun([AS_DIRNAME],
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[AS_DIRNAME_EXPR([$1]) 2>/dev/null ||
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AS_DIRNAME_SED([$1])])
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# AS_BASENAME(PATHNAME)
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# --------------------
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# Simulate running `basename(1)' on PATHNAME, not all systems have it.
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# This macro must be usable from inside ` `.
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m4_defun([AS_BASENAME],
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[echo "$1" |sed 's,.*[[\\/]],,'])
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# AS_EXECUTABLE_P
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# ---------------
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# Check whether a file is executable.
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m4_defun([AS_EXECUTABLE_P],
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[m4_require([_AS_TEST_PREPARE])dnl
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$as_executable_p $1[]dnl
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])# AS_EXECUTABLE_P
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# _AS_EXPR_PREPARE
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# ----------------
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# Some expr work properly (i.e. compute and issue the right result),
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# but exit with failure. When a fall back to expr (as in AS_DIRNAME)
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# is provided, you get twice the result. Prevent this.
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m4_defun([_AS_EXPR_PREPARE],
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[if expr a : '\(a\)' >/dev/null 2>&1; then
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as_expr=expr
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else
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as_expr=false
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fi
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])# _AS_EXPR_PREPARE
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# _AS_LN_S_PREPARE
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# ----------------
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# Don't use conftest.sym to avoid filename issues on DJGPP, where this
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# would yield conftest.sym.exe for DJGPP < 2.04. And don't use `conftest'
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# as base name to avoid prohibiting concurrency (e.g., concurrent
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# config.statuses).
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m4_defun([_AS_LN_S_PREPARE],
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[rm -f conf$$ conf$$.exe conf$$.file
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echo >conf$$.file
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if ln -s conf$$.file conf$$ 2>/dev/null; then
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# We could just check for DJGPP; but this test a) works b) is more generic
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# and c) will remain valid once DJGPP supports symlinks (DJGPP 2.04).
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if test -f conf$$.exe; then
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# Don't use ln at all; we don't have any links
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as_ln_s='cp -p'
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else
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as_ln_s='ln -s'
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fi
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elif ln conf$$.file conf$$ 2>/dev/null; then
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as_ln_s=ln
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else
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as_ln_s='cp -p'
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fi
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rm -f conf$$ conf$$.exe conf$$.file
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])# _AS_LN_S_PREPARE
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# AS_LN_S(FILE, LINK)
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# -------------------
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# FIXME: Should we add the glue code to handle properly relative symlinks
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# simulated with `ln' or `cp'?
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m4_defun([AS_LN_S],
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[m4_require([_AS_LN_S_PREPARE])dnl
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$as_ln_s $1 $2
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])
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# AS_MKDIR_P(PATH)
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# ----------------
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# Emulate `mkdir -p' with plain `mkdir'.
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#
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# Don't set IFS to '\\/' (see the doc): you would end up with
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# directories called foo\bar and foo?az and others depending upon the
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# shell.
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m4_define([AS_MKDIR_P],
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[{ case $1 in
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[[\\/]]* | ?:[[\\/]]* ) as_incr_dir=;;
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*) as_incr_dir=.;;
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esac
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as_dummy=$1
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for as_mkdir_dir in `IFS='/\\'; set X $as_dummy; shift; echo "$[@]"`; do
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case $as_mkdir_dir in
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# Skip DOS drivespec
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?:) as_incr_dir=$as_mkdir_dir ;;
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*)
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as_incr_dir=$as_incr_dir/$as_mkdir_dir
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test -d "$as_incr_dir" || mkdir "$as_incr_dir"
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;;
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esac
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done; }
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])# AS_MKDIR_P
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# _AS_BROKEN_TEST_PREPARE
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# -----------------------
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# FIXME: This does not work and breaks way too many things.
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#
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# Find out ahead of time whether we want test -x (preferred) or test -f
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# to check whether a file is executable.
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m4_defun([_AS_BROKEN_TEST_PREPARE],
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[# Find out how to test for executable files. Don't use a zero-byte file,
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# as systems may use methods other than mode bits to determine executability.
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cat >conf$$.file <<_ASEOF
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@%:@! /bin/sh
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exit 0
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_ASEOF
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chmod +x conf$$.file
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if test -x conf$$.file >/dev/null 2>&1; then
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as_executable_p="test -x"
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elif test -f conf$$.file >/dev/null 2>&1; then
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as_executable_p="test -f"
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else
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AS_ERROR([cannot check whether a file is executable on this system])
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fi
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rm -f conf$$.file
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])# _AS_BROKEN_TEST_PREPARE
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# _AS_TEST_PREPARE
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# ----------------
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m4_defun([_AS_TEST_PREPARE],
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[as_executable_p="test -f"
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])# _AS_BROKEN_TEST_PREPARE
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## ------------------ ##
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## 5. Common idioms. ##
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## ------------------ ##
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# This section is lexicographically sorted.
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# AS_BOX(MESSAGE, [FRAME-CHARACTER = `='])
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# ----------------------------------------
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# Output MESSAGE, a single line text, framed with FRAME-CHARACTER (which
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# must not be `/').
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m4_define([AS_BOX],
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[AS_LITERAL_IF([$1],
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[_AS_BOX_LITERAL($@)],
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[_AS_BOX_INDIR($@)])])
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# _AS_BOX_LITERAL(MESSAGE, [FRAME-CHARACTER = `='])
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# -------------------------------------------------
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m4_define([_AS_BOX_LITERAL],
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[cat <<\_ASBOX
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m4_patsubst([$1], [.], m4_if([$2], [], [[=]], [[$2]]))
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$1
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m4_patsubst([$1], [.], m4_if([$2], [], [[=]], [[$2]]))
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_ASBOX])
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# _AS_BOX_INDIR(MESSAGE, [FRAME-CHARACTER = `='])
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# -----------------------------------------------
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m4_define([_AS_BOX_INDIR],
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[sed 'h;s/./m4_default([$2], [=])/g;p;x;p;x' <<_ASBOX
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$1
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_ASBOX])
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# AS_LITERAL_IF(EXPRESSION, IF-LITERAL, IF-NOT-LITERAL)
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# -----------------------------------------------------
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# If EXPRESSION has shell indirections ($var or `expr`), expand
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# IF-INDIR, else IF-NOT-INDIR.
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|
# This is an *approximation*: for instance EXPRESSION = `\$' is
|
|
# definitely a literal, but will not be recognized as such.
|
|
m4_define([AS_LITERAL_IF],
|
|
[m4_if(m4_regexp([$1], [[`$]]),
|
|
-1, [$2],
|
|
[$3])])
|
|
|
|
|
|
# AS_TMPDIR(PREFIX)
|
|
# -----------------
|
|
# Create as safely as possible a temporary directory which name is
|
|
# inspired by PREFIX (should be 2-4 chars max), and set trap
|
|
# mechanisms to remove it.
|
|
m4_define([AS_TMPDIR],
|
|
[# Create a temporary directory, and hook for its removal unless debugging.
|
|
$debug ||
|
|
{
|
|
trap 'exit_status=$?; rm -rf $tmp && exit $exit_status' 0
|
|
trap 'AS_EXIT([1])' 1 2 13 15
|
|
}
|
|
|
|
# Create a (secure) tmp directory for tmp files.
|
|
: ${TMPDIR=/tmp}
|
|
{
|
|
tmp=`(umask 077 && mktemp -d -q "$TMPDIR/$1XXXXXX") 2>/dev/null` &&
|
|
test -n "$tmp" && test -d "$tmp"
|
|
} ||
|
|
{
|
|
tmp=$TMPDIR/$1$$-$RANDOM
|
|
(umask 077 && mkdir $tmp)
|
|
} ||
|
|
{
|
|
echo "$me: cannot create a temporary directory in $TMPDIR" >&2
|
|
AS_EXIT
|
|
}dnl
|
|
])# AS_TMPDIR
|
|
|
|
|
|
# AS_UNAME
|
|
# --------
|
|
# Try to describe this machine. Meant for logs.
|
|
m4_define([AS_UNAME],
|
|
[{
|
|
cat <<_ASUNAME
|
|
## ---------- ##
|
|
## Platform. ##
|
|
## ---------- ##
|
|
|
|
hostname = `(hostname || uname -n) 2>/dev/null | sed 1q`
|
|
uname -m = `(uname -m) 2>/dev/null || echo unknown`
|
|
uname -r = `(uname -r) 2>/dev/null || echo unknown`
|
|
uname -s = `(uname -s) 2>/dev/null || echo unknown`
|
|
uname -v = `(uname -v) 2>/dev/null || echo unknown`
|
|
|
|
/usr/bin/uname -p = `(/usr/bin/uname -p) 2>/dev/null || echo unknown`
|
|
/bin/uname -X = `(/bin/uname -X) 2>/dev/null || echo unknown`
|
|
|
|
/bin/arch = `(/bin/arch) 2>/dev/null || echo unknown`
|
|
/usr/bin/arch -k = `(/usr/bin/arch -k) 2>/dev/null || echo unknown`
|
|
/usr/convex/getsysinfo = `(/usr/convex/getsysinfo) 2>/dev/null || echo unknown`
|
|
hostinfo = `(hostinfo) 2>/dev/null || echo unknown`
|
|
/bin/machine = `(/bin/machine) 2>/dev/null || echo unknown`
|
|
/usr/bin/oslevel = `(/usr/bin/oslevel) 2>/dev/null || echo unknown`
|
|
/bin/universe = `(/bin/universe) 2>/dev/null || echo unknown`
|
|
|
|
PATH = $PATH
|
|
|
|
_ASUNAME
|
|
}])
|
|
|
|
|
|
|
|
## ------------------------------------ ##
|
|
## Common m4/sh character translation. ##
|
|
## ------------------------------------ ##
|
|
|
|
# The point of this section is to provide high level macros comparable
|
|
# to m4's `translit' primitive, but m4/sh polymorphic.
|
|
# Transliteration of literal strings should be handled by m4, while
|
|
# shell variables' content will be translated at runtime (tr or sed).
|
|
|
|
|
|
# _AS_CR_PREPARE
|
|
# --------------
|
|
# Output variables defining common character ranges.
|
|
# See m4_cr_letters etc.
|
|
m4_defun([_AS_CR_PREPARE],
|
|
[# Avoid depending upon Character Ranges.
|
|
as_cr_letters='abcdefghijklmnopqrstuvwxyz'
|
|
as_cr_LETTERS='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
|
|
as_cr_Letters=$as_cr_letters$as_cr_LETTERS
|
|
as_cr_digits='0123456789'
|
|
as_cr_alnum=$as_cr_Letters$as_cr_digits
|
|
])
|
|
|
|
|
|
# _AS_TR_SH_PREPARE
|
|
# -----------------
|
|
m4_defun([_AS_TR_SH_PREPARE],
|
|
[m4_require([_AS_CR_PREPARE])dnl
|
|
# Sed expression to map a string onto a valid variable name.
|
|
as_tr_sh="sed y%*+%pp%;s%[[^_$as_cr_alnum]]%_%g"
|
|
])
|
|
|
|
|
|
# AS_TR_SH(EXPRESSION)
|
|
# --------------------
|
|
# Transform EXPRESSION into a valid shell variable name.
|
|
# sh/m4 polymorphic.
|
|
# Be sure to update the definition of `$as_tr_sh' if you change this.
|
|
m4_defun([AS_TR_SH],
|
|
[m4_require([_$0_PREPARE])dnl
|
|
AS_LITERAL_IF([$1],
|
|
[m4_patsubst(m4_translit([[$1]], [*+], [pp]),
|
|
[[^a-zA-Z0-9_]], [_])],
|
|
[`echo "$1" | $as_tr_sh`])])
|
|
|
|
|
|
# _AS_TR_CPP_PREPARE
|
|
# ------------------
|
|
m4_defun([_AS_TR_CPP_PREPARE],
|
|
[m4_require([_AS_CR_PREPARE])dnl
|
|
# Sed expression to map a string onto a valid CPP name.
|
|
as_tr_cpp="sed y%*$as_cr_letters%P$as_cr_LETTERS%;s%[[^_$as_cr_alnum]]%_%g"
|
|
])
|
|
|
|
|
|
# AS_TR_CPP(EXPRESSION)
|
|
# ---------------------
|
|
# Map EXPRESSION to an upper case string which is valid as rhs for a
|
|
# `#define'. sh/m4 polymorphic. Be sure to update the definition
|
|
# of `$as_tr_cpp' if you change this.
|
|
m4_defun([AS_TR_CPP],
|
|
[m4_require([_$0_PREPARE])dnl
|
|
AS_LITERAL_IF([$1],
|
|
[m4_patsubst(m4_translit([[$1]],
|
|
[*abcdefghijklmnopqrstuvwxyz],
|
|
[PABCDEFGHIJKLMNOPQRSTUVWXYZ]),
|
|
[[^A-Z0-9_]], [_])],
|
|
[`echo "$1" | $as_tr_cpp`])])
|
|
|
|
|
|
# _AS_TR_PREPARE
|
|
# --------------
|
|
m4_defun([_AS_TR_PREPARE],
|
|
[m4_require([_AS_TR_SH_PREPARE])dnl
|
|
m4_require([_AS_TR_CPP_PREPARE])dnl
|
|
])
|
|
|
|
|
|
|
|
|
|
## --------------------------------------------------- ##
|
|
## Common m4/sh handling of variables (indirections). ##
|
|
## --------------------------------------------------- ##
|
|
|
|
|
|
# The purpose of this section is to provide a uniform API for
|
|
# reading/setting sh variables with or without indirection.
|
|
# Typically, one can write
|
|
# AS_VAR_SET(var, val)
|
|
# or
|
|
# AS_VAR_SET(as_$var, val)
|
|
# and expect the right thing to happen.
|
|
|
|
|
|
# AS_VAR_SET(VARIABLE, VALUE)
|
|
# ---------------------------
|
|
# Set the VALUE of the shell VARIABLE.
|
|
# If the variable contains indirections (e.g. `ac_cv_func_$ac_func')
|
|
# perform whenever possible at m4 level, otherwise sh level.
|
|
m4_define([AS_VAR_SET],
|
|
[AS_LITERAL_IF([$1],
|
|
[$1=$2],
|
|
[eval "$1=$2"])])
|
|
|
|
|
|
# AS_VAR_GET(VARIABLE)
|
|
# --------------------
|
|
# Get the value of the shell VARIABLE.
|
|
# Evaluates to $VARIABLE if there are no indirection in VARIABLE,
|
|
# else into the appropriate `eval' sequence.
|
|
m4_define([AS_VAR_GET],
|
|
[AS_LITERAL_IF([$1],
|
|
[$[]$1],
|
|
[`eval echo '${'m4_patsubst($1, [[\\`]], [\\\&])'}'`])])
|
|
|
|
|
|
# AS_VAR_TEST_SET(VARIABLE)
|
|
# -------------------------
|
|
# Expands into the `test' expression which is true if VARIABLE
|
|
# is set. Polymorphic. Should be dnl'ed.
|
|
m4_define([AS_VAR_TEST_SET],
|
|
[AS_LITERAL_IF([$1],
|
|
[test "${$1+set}" = set],
|
|
[eval "test \"\${$1+set}\" = set"])])
|
|
|
|
|
|
# AS_VAR_SET_IF(VARIABLE, IF-TRUE, IF-FALSE)
|
|
# ------------------------------------------
|
|
# Implement a shell `if-then-else' depending whether VARIABLE is set
|
|
# or not. Polymorphic.
|
|
m4_define([AS_VAR_SET_IF],
|
|
[AS_IF([AS_VAR_TEST_SET([$1])], [$2], [$3])])
|
|
|
|
|
|
# AS_VAR_PUSHDEF and AS_VAR_POPDEF
|
|
# --------------------------------
|
|
#
|
|
|
|
# Sometimes we may have to handle literals (e.g. `stdlib.h'), while at
|
|
# other moments, the same code may have to get the value from a
|
|
# variable (e.g., `ac_header'). To have a uniform handling of both
|
|
# cases, when a new value is about to be processed, declare a local
|
|
# variable, e.g.:
|
|
#
|
|
# AS_VAR_PUSHDEF([header], [ac_cv_header_$1])
|
|
#
|
|
# and then in the body of the macro, use `header' as is. It is of
|
|
# first importance to use `AS_VAR_*' to access this variable. Don't
|
|
# quote its name: it must be used right away by m4.
|
|
#
|
|
# If the value `$1' was a literal (e.g. `stdlib.h'), then `header' is
|
|
# in fact the value `ac_cv_header_stdlib_h'. If `$1' was indirect,
|
|
# then `header's value in m4 is in fact `$ac_header', the shell
|
|
# variable that holds all of the magic to get the expansion right.
|
|
#
|
|
# At the end of the block, free the variable with
|
|
#
|
|
# AS_VAR_POPDEF([header])
|
|
|
|
|
|
# AS_VAR_PUSHDEF(VARNAME, VALUE)
|
|
# ------------------------------
|
|
# Define the m4 macro VARNAME to an accessor to the shell variable
|
|
# named VALUE. VALUE does not need to be a valid shell variable name:
|
|
# the transliteration is handled here. To be dnl'ed.
|
|
m4_define([AS_VAR_PUSHDEF],
|
|
[AS_LITERAL_IF([$2],
|
|
[m4_pushdef([$1], [AS_TR_SH($2)])],
|
|
[as_$1=AS_TR_SH($2)
|
|
m4_pushdef([$1], [$as_[$1]])])])
|
|
|
|
|
|
# AS_VAR_POPDEF(VARNAME)
|
|
# ----------------------
|
|
# Free the shell variable accessor VARNAME. To be dnl'ed.
|
|
m4_define([AS_VAR_POPDEF],
|
|
[m4_popdef([$1])])
|
|
|
|
|
|
|
|
## ----------------- ##
|
|
## Setting M4sh up. ##
|
|
## ----------------- ##
|
|
|
|
|
|
# AS_INIT
|
|
# -------
|
|
m4_define([AS_INIT],
|
|
[m4_init
|
|
|
|
# Forbidden tokens and exceptions.
|
|
m4_pattern_forbid([^_?AS_])
|
|
])
|