Originally Posted by gnashley
On Slackware it is not a good idea to use the 'make install' command as it may not work properly and leave your system unbootable. Instead, install the kernel by hand as directed in the Guide. It's okay to use 'make modules_install' to install the modules, but even there it is a good idea to back up your modules or change the name of the folder before running the command.
That's why I always almost never use make install myself regardless of distribution.
On most modern Linux distributions make install is a bad idea. It usually conflicts with package manager tracked files as well as some system specific files.