When attempting to compile PHP on Centos 6.x, you might run into a compile error such as:
php pdo/php_pdo.h: No such file or directory
and
php pdo/php_pdo_driver.h: No such file or directory
These files do exist, just not in the location that the configure script looks for them. There are two ways to fix this, the first would be to modify the configure script to look in the proper place and the second would be to create two symbolic links for the rogue files. I chose the second method.
The files are in *ext/pdo/, but the configure script looks in *pdo/ so we want to make the pdo directory and create the links within:
make clean mkdir pdo ln -s ext/pdo/php_pdo.h pdo/php_pdo.h ln -s ext/pdo/php_pdo_driver.h pdo/php_pdo_driver.h
OR, more simply…
ln -s ./ext/pdo
Now re-configure and compile. Done.