If you are root:
./configure && make && make install

If you are not root:
use ./configure --prefix=/some/dir/you/can/creat/and/write/and/read 
instead of ./configure. Then make and make install.
You should set MANPATH and INFOPATH,too. 

Document and examples may be installed in $prefix/share/phc/doc.

./configure --help for more options.



