I recently ran in to a situation where I was building PHP 7.1.13 from source. Configuration & make went fine, however, when I ran make install it hung. It turns out that if you are building PHP with Apache (apxs) the make file calls apxs with the -a flag which tells it to modify the httpd.conf file. If, for whatever reason, the file is not writeable then it fails and you get the hang. Line 108 in