Recently, while setting up a FreeBSD laptop, I was configuring Phpactor as Language Server for PHP. The idea was to have it working in Vim through the YouCompleteMe plugin.
While trying to start the Phpactor server, I received the following error (among others):
Use of undefined constant SIGINT - assumed 'SIGINT' (this will throw an Error in a future version of PHP)
The reason for this is that, as indicates PHP site:
Process Control support in PHP is not enabled by default. You have to compile the CGI or CLI version of PHP with
--enable-pcntlconfiguration option when compiling PHP to enable Process Control support.
Nonetheless, you are no required to recompile your PHP binaries. Chances are there’s a PHP package which provides this functionality for PHP.
In my case (FreeBSD), I found the package by issuing the following command:
$ pkg search pcntl
And as I’m using PHP 7.4, I installed php74-pcntl-7.4.29 package:
$ pkg install php74-pcntl-7.4.29
After installing the package, the problem mentioned at the beginning of this post was solved.
