Changes

If youthis doesn're having trouble or are missing dependenciest work, refer to [https://developer.mozilla.org/en/SpiderMonkey/Build_Documentation#Building_SpiderMonkey_tip Building the SpiderMonkey Tipbuild documentation]. <tt>VPATH</tt> builds, also called out-of-source builds, must be used, hence the <tt>mkdir</tt> above is not an options. It is not sufficient to have ''autoconf'' installed on your system, that happens to have the version 2.13. For the <tt>../configure</tt> process a binary called <tt>autoconf2.13</tt> or <tt>autoconf-2.13</tt> must be on your <tt>$PATH</tt>.