Guido U. Draheim <guidod@gmx.de>
GPLWithACException
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. 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
guidod's Miscellaneous (released)
Parts of the implementation have been taken from AS_DIRNAME from
the main autoconf package in generation 2.5x. However, we do only
use "sed" to cut out the dirname, and we do additionally clean up
some dir/.. parts in the resulting pattern.
this macro may be used in autoconf 2.13 scripts as well.
AC_DEFUN([AX_DIRNAME],
[echo X[]$1 |
sed ['s/\/[^\/:][^\/:]*\/..\//\//g
s/\/[^\/:][^\/:]*\/..\//\//g
s/\/[^\/:][^\/:]*\/..\//\//g
s/\/[^\/:][^\/:]*\/..\//\//g
/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{ s//\1/; q; }
/^X\(\/\/\)[^/].*/{ s//\1/; q; }
/^X\(\/\/\)$/{ s//\1/; q; }
/^X\(\/\).*/{ s//\1/; q; }
s/.*/./; q']])