I am trying to setup PHP Falcon framework on a MAC and ran into a little problem when creating the extension from C source.

After my git clone (git clone --depth=1 git://github.com/phalcon/cphalcon.git), changing directory to cphalcon/build and running sudo ./install gave an error:

/Users/<username>/Downloads/cphalcon/build/64bits/phalcon.c:169:10: fatal error: 'main/php.h' file not found

To solve this, follow the following steps:

1. MAMP doesn't provide the source code archive for PHP 5.x.xx, so download it from php.net

2. Extract the source code archive to /Applications/MAMP/bin/php/php5.x.xx/include/php

3. Change directory into /Applications/MAMP/bin/php/php5.x.xx/include/php i.e cd /Applications/MAMP/bin/php/php5.x.xx/include/php

4. Run ./configure (i.e type ./configure on your terminal and press Enter) to configure the source code for your platform (this would enable it see the bunch of header files)

5. Re-try sudo ./install

Hope this helped someone stay out of trouble.