Add flag to link musl instead of glibc

Makefile

@@ -1,6 +1,10 @@
 default: lib
 
-CC      := cc
+ifdef LIBSM64_MUSL
+  CC    := musl-gcc
+else
+  CC    := cc
+endif
 CFLAGS  := -g -Wall -fPIC -DSM64_LIB_EXPORT
 LDFLAGS := -lm -shared
 

README.md

@@ -17,7 +17,7 @@ which makes use of this library must ask the user to provide a ROM for asset ext
 
 - Ensure python3 is installed.
 - Ensure the SDL2 and GLEW libraries are installed if you're building the test program (on Ubuntu: libsdl2-dev, libglew-dev)
-- Run `make` to build
+- Run `make` to build. If you want to link musl libc instead of glibc run `LIBSM64_MUSL=1 make` instead.
 - To run the test program you'll need a SM64 US ROM in the root of the repository with the name `baserom.us.z64`.
 
 ## Building on Windows (test program not supported)