Created attachment 1933114 [details] dx-c99.patch A few changes are needed to build dx in strict(er) C99 mode. Upstream does not seem to be around anymore, so I'm filing this here for tracking purposes.
Created attachment 2007885 [details] dx-c99.patch Additional fixes for incorrect return types.
Created attachment 2007897 [details] dx-c99.patch Even more comparability fixes.