Trying to build php getting an error.

Is there someone else who has got this error? Possible it is something stuppid I did but I don't know what. I have used ./configure --with-mysql gandalf:~/php-4.2.0 # make Making all in Zend make[1]: Entering directory `/root/php-4.2.0/Zend' yacc -p zend -v -d ./zend_language_parser.y -o zend_language_parser.c usage: yacc [-dlrtv] [-b file_prefix] [-p symbol_prefix] filename make[1]: *** [zend_language_parser.c] Error 1 make[1]: Leaving directory `/root/php-4.2.0/Zend' make: *** [all-recursive] Error 1 gandalf:~/php-4.2.0 # Thank's Nico Berg