title: Cross compile PHP for aarch64 - error can not run test
body: <p>I'm trying to compile PHP 7.0.1  (downloaded on PHP website) for aarch64 platform.(aarch64 GNU/Linux)</p>
  
  <p>I configure for compile like this : </p>
  
  <pre><code>export ARCH=arm64
  export CROSS_COMPILE=aarch64-linux-gnu-
  export PATH=$PATH:/home/xyz/gcc-linaro-aarch64-linux-gnu-4.9-2014.09_linux/bin
  
  ./configure  --host=aarch64-linux-gnu --prefix=/home/xyz --disable-libxml --disable-dom --without-iconv --without-openssl --disable-simplexml --disable-xml --disable-xmlreader --disable-xmlwriter --without-pear --without-sqlite3 --disable-pdo --without-pdo-sqlite --disable-phar --disable-test
  
  
   checking for strcasestr... configure: error: in /home/xyz/PHP/php-7.0.1: 
    configure: error: cannot run test program while cross compiling 
    See config.log for more details
  </code></pre>
  
  <p>Ask me if you need more precision.</p>