Things that blew my mind today about Emacs:
* It requires at least librsvg 2.14, which is from 2006, which is when rsvg_handle_get_dimensions() was introduced. That function was deprecated in 2.52, in 2021. If available, Emacs will use all the new APIs. There is #ifdef hell in there.
* src/image.c is 13K lines of code.
* Emacs still uses debbugs.
* The first commit is from 1985, but the first hundreds of commits are weird. It normalizes in 1991.
* And Savannah still uses cgit.
I really thought there was a paper titled "C Considered Harmful" but what I can find is this one from 1992:
Authors: Henry Spencer, University of Toronto; Geoff Collyer, Software Tool & Die
Abstract:
We believe that a C programmer's impulse to use #ifdef in an attempt at portability is usually a mistake. Portability is generally the result of advance planning rather than trench warfare involving #ifdef. In the course of developing C News on different systems, we evolved various tactics for dealing with differences among systems without producing a welter of #ifdef at points of difference. We discuss the alternatives to, and occasional proper use of, #ifdef.
