It looks to me like this is also worthy of ignoring, since it's
autogenerated at make time.

- Use non-POSIX :=,?=,+= macro assignments, fixes issue #97
- No optimization level set in CFLAGS, expected to be set in environment
- Automatic header dependency tracking with one .d file per compilation unit
- Better fix for issue #181

- *_SUPPORT enabled in config.h
- XLIBS helper app prints lib flags needed for current settings

- config.h -> config.def.h
- Create config.h during make, if it does not exist
- Nice make output
- Use XFLAGS and XLIBS to include additional compile-time features,
  which depend on third-party libraries