Fix for Silly Annoying FreeBSD PHP Ports Errors

The following occurs quite regularly on FreeBSD:

Cannot find autoconf. Please check your autoconf installation and the
$PHP_AUTOCONF environment variable. Then, rerun this script.

and when fixed, it’s followed up by:

Cannot find autoheader. Please check your autoconf installation and the
$PHP_AUTOHEADER environment variable. Then, rerun this script.

The fix is to set those environment variables (as appropriate for the autoconf and autoheader version numbers – the below is my example on FreeBSD 8.1):

export PHP_AUTOCONF=/usr/local/bin/autoconf-2.68
export PHP_AUTOHEADER=/usr/local/bin/autoheader-2.68

in bash of the following in tcsh:

setenv PHP_AUTOCONF autoconf-2.68
setenv PHP_AUTOHEADER autoheader-2.68