[jekdoce]

For C/C++ RTags (https://github.com/Andersbakken/rtags) together with company-mode and fly-check can do jump-to-definition, auto-completion and on-the-fly-syntax-checking. Super easy to use if using cmake as build system.

Respond to this comment if you need pointers on how to set things up.

[fizixer]

Any equivalent options for make?

[LazyGrizzly]

For make you could use bear (https://github.com/rizsotto/Bear). It allows you to generate a compilation database that is equivalent to that of cmake projects.