Enabling PHP pdo_odbc extension on a Mac OSX

I am trying to get the pdo_odbc extension for PHP enabled on my Mac which is running PHP 5.3 Here is what i did to try to get it to work:

1. I installed UnixODBC with brew

   $ brew install unixodbc
   

2. Downloaded the source for PHP 5.3.8. In the terminal I navigated to the pdo_odbc folder. Then did the following.

   $ phpize
   $ ./configure --with-pdo-odbc=unixODBC
   $ make
   

   There was an error.

   /Users/todd/Downloads/php-5.3.8/ext/pdo_odbc/pdo_odbc.c:43: error: ‘ZEND_MOD_END’ undeclared here (not in a function)
   /Users/todd/Downloads/php-5.3.8/ext/pdo_odbc/pdo_odbc.c: In function ‘zm_startup_pdo_odbc’:
   /Users/todd/Downloads/php-5.3.8/ext/pdo_odbc/pdo_odbc.c:135: warning: cast to pointer from integer of different size
   

   Based on some blogs I replaced ZEND_MOD_END with {NULL,NUll, NULL} and ran make again. This time it complied.

3. Then I ran "sudo make install" and that installed the extension in the right place. I modifed php.ini to enable it. And it shows up in phpInfo()

So far so good. But when I start running simple tests I get errors about every other try

php(20048,0x7fff796f1960) malloc: *** mmap(size=2977160837258543104) failed (error code=12)
*** error: can't allocate region
*** set a breakpoint in malloc_error_break to debug
terminate called throwing an exceptionAbort trap: 6

This was thrown, when i tried to execute this code:

<?php

   $dsn = 'odbc:Driver={FileMaker ODBC};Server=localhost;Database=CalDAV;';
   $pdo = new PDO($dsn, "odbc", "odbc");

   $sql = "SELECT * From Users Where id = 2";
   $r = $pdo->query($sql);
   print_r($r->fetch(PDO::FETCH_ASSOC));

   $sql = "SELECT * From Users Where id = ?";
   $stmt = $pdo->prepare($sql);
   $stmt->execute(array(2));
   print_r($stmt->fetch(PDO::FETCH_ASSOC));

?>