ALLINONE and EXPORT macros

[uno20001]

While browsing the code base I found two macros: ALLINONE and EXPORT. Is there any value this functionality brings to the software? Because I could not figure out why it is beneficial to have just a single translation unit. In a brief correspondence with the current owner of the project, @Rudde, s/he said s/he did not know the origins of these two macros. So this question is mainly directed towards the original author, @esmil (as far as I know).

[esmil]

As far as I recall this was like a poor mans LTO way before it existed in GCC. Similar to LTO compiling everything as a single translation unit allows the compiler to do optimizations (inlining, constant propagation etc.) across files. It was probably never worth it, but these days you can just add -flto to CFLAGS to get a similar effect.

[uno20001]

I see. What is your opinion on removing them from the code altogether?

[esmil]

I think that's a great idea. but I've handed the project over to Rudde, so it's his call.