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Autoconf Macro: ac_as_dirname
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<h1>
ac_as_dirname
</h1>
<h2>
Obsolete Macro
</h2>
<p class="indent">
Autoconf 2.5x makes this unnecessary.
</p>
<h2>
Synopsis
</h2>
<p class="indent" style="white-space:nowrap;">
<code>AC_AS_DIRNAME (PATH)</code>
</p>
<h2>
Description
</h2>
<div class="indent">
<p>
this is the macro AS_DIRNAME from autoconf 2.4x defined here for use in
autoconf 2.1x, remove the AC_ when you use 2.4x
</p>
</div>
<h2>
Author
</h2>
<p class="indent">
Guido U. Draheim <guidod@gmx.de>
</p>
<h2>
Last Modified
</h2>
<p class="indent">
2006-10-13
</p>
<h2>
M4 Source Code
</h2>
<div class="indent">
<pre class="m4source">
AC_DEFUN([AC_ECHO_MKFILE],
[dnl
case $2 in
*/*) P=` AC_AS_DIRNAME($2) ` ; AC_AS_MKDIR_P($P) ;;
esac
echo "$1" >$2
])
AC_DEFUN([AC_AS_DIRNAME],
[AC_AS_DIRNAME_EXPR([$1]) 2>/dev/null ||
AC_AS_DIRNAME_SED([$1])
])
# _AC_AS_EXPR_PREPARE
# ----------------
# Some expr work properly (i.e. compute and issue the right result),
# but exit with failure. When a fall back to expr (as in AS_DIRNAME)
# is provided, you get twice the result. Prevent this.
AC_DEFUN([_AC_AS_EXPR_PREPARE],
[if expr a : '\(a\)' >/dev/null 2>&1; then
as_expr=expr
else
as_expr=false
fi
])# _AC_AS_EXPR_PREPARE
# AS_DIRNAME(PATHNAME)
# --------------------
# Simulate running `dirname(1)' on PATHNAME, not all systems have it.
# This macro must be usable from inside ` `.
#
# Prefer expr to echo|sed, since expr is usually faster and it handles
# backslashes and newlines correctly. However, older expr
# implementations (e.g. SunOS 4 expr and Solaris 8 /usr/ucb/expr) have
# a silly length limit that causes expr to fail if the matched
# substring is longer than 120 bytes. So fall back on echo|sed if
# expr fails.
#
# FIXME: Please note the following m4_require is quite wrong: if the first
# occurrence of AS_DIRNAME_EXPR is in a backquoted expression, the
# shell will be lost. We might have to introduce diversions for
# setting up an M4sh script: required macros will then be expanded there.
AC_DEFUN([AC_AS_DIRNAME_EXPR],
[AC_REQUIRE([_AC_AS_EXPR_PREPARE])dnl
$as_expr X[]$1 : 'X\(.*[[^/]]\)//*[[^/][^/]]*/*$' \| \
X[]$1 : 'X\(//\)[[^/]]' \| \
X[]$1 : 'X\(//\)$' \| \
X[]$1 : 'X\(/\)' \| \
. : '\(.\)'])
AC_DEFUN([AC_AS_DIRNAME_SED],
[echo X[]$1 |
sed ['/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{ s//\1/; q; }
/^X\(\/\/\)[^/].*/{ s//\1/; q; }
/^X\(\/\/\)$/{ s//\1/; q; }
/^X\(\/\).*/{ s//\1/; q; }
s/.*/./; q']])
</pre>
</div>
<h2>
License
</h2>
<div class="indent">
<span style="white-space:nowrap;">Copyright © 2006 Guido U. Draheim
<guidod@gmx.de></span>
<p>
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 of the License, or (at your option)
any later version.
</p>
<p>
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.
</p>
<p>
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.
</p>
<p>
As a special exception, the respective Autoconf Macro's copyright owner
gives unlimited permission to copy, distribute and modify the configure
scripts that are the output of Autoconf when processing the Macro. 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 the Macro
appear in them. The GNU General Public License (GPL) does govern all other
use of the material that constitutes the Autoconf Macro.
</p>
<p>
This special exception to the GPL applies to versions of the Autoconf Macro
released by the Autoconf Macro Archive. When you make and distribute a
modified version of the Autoconf Macro, you may extend this special
exception to the GPL to apply to your modified version as well.
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