commit 334618e

Add a document with information about compiling.

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 2+This document contains instructions for compiling the programs in this
 3+repository, in case they are helpful for anyone.
 4+
 5+Note that these programs are designed for Linux. There is no guarantee
 6+that they will work on Windows; if you wish to use them on Windows, you
 7+may consider using WSL (although I have not tried this, because I do not
 8+have Microsoft Windows).
 9+
10+
11+=== Assembler ===
12+
13+The uxnasm.c file is the assembler and does not have any dependencies
14+other than the C standard library; you can just compile it normally,
15+using gcc or clang (although I have not tried clang).
16+
17+
18+=== Emulator ===
19+
20+The main.c file is the emulator itself, and requires SDL1. The top of
21+the main.c file contains a shell command to compile it which works on
22+my computer, although your computer might be set up differently.
23+
24+One person, who was using Windows 11, WSL2, Ubuntu, compiled it using the
25+below command, with the "libsdl1.2-compat-dev" package:
26+  gcc main.c -o uxn38 -I/usr/include/SDL -D_GNU_SOURCE=1 -D_REENTRANT -lSDL -L/usr/local/lib
27+