`make latex` able to rebuild only what is needed, just as `make html`?

Is your feature request related to a problem? Please describe. I'm always frustrated when I have to recompile the whole PDF of my project, even though only one of its many source files has changed, whereas, for HTML output, only the corresponding HTML file is rebuilt.

Describe the solution you'd like It would be nice to have make latex as make html able to rebuild only what is needed. For this, make latex would have to copy the HTML builder but it looks needed then for its mechanism to produce in build repertory as many .tex files as there are source files. Hopefully it should be possible from one extra "main" file to "input" all the small "unit files". Is this possible?