Description:
------------
The order of ./configure arguments can result in --enable-memory-limit functionality not being built into the binary.



Reproduce code:
---------------
1) Build PHP with: ./configure  --with-mysql=/usr --with-curl --with-gettext --with-mcrypt --with-dom --enable-inline --enable-sysvmsg --enable-sysvsem --enable-sysvshm --with-zlib-dir=/usr/lib --with-openssl --enable-ftp --with-apache=../apache_1.3.34 --enable-memcache --enable-mbstring --enable-memory-limit

2) Observe in the configure output that "checking whether to enable a memory limit... yes"

3) Install, make sure memory_limit is set in php.ini and restart apache and load phpinfo(). Observe there is no memory_limit value in the PHP Core output however --enable-memory-limit is listed in the Configure Command output. Test calls to memory_get_usage() will result in a PHP Fatal call to an undefined function.

4) Rebuild PHP with: ./configure  --with-mysql=/usr --with-curl --with-gettext --with-mcrypt --with-dom --enable-inline --enable-sysvmsg --enable-sysvsem --enable-sysvshm --with-zlib-dir=/usr/lib --with-openssl --enable-ftp --enable-memory-limit --enable-memcache --enable-mbstring --with-apache=../apache_1.3.34

5) Again in the config output you should see: "checking whether to enable a memory limit... yes"

6) Install, restart apache, and load phpinfo(). memory_limit is now visible in the PHP Core output and functions like memory_get_usage() work again


Expected result:
----------------
Both configure lines should result in an identical PHP build

Actual result:
--------------
--enable-memory-limit functionality is missing from the build.