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AX_DIRNAME(PATHNAME)
0.5.55 : guidod
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.
@$Id: ax_dirname.m4,v 1.1 2003/07/02 23:42:59 guidod Exp $
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']])