suacomp 0.6.14 will not compile on SUA 6.0 because it includes implementations of strtoll.c and strtoull.c which are already defined in stdlib.h. The define itself will cause the prototypes to not even be valid C and the build fails. I have submitted a patch upstream which also works well with epatch. https://sourceforge.net/p/suacomp/tickets/1/ Reproducible: Always
My patch turned out to be a bad idea. I'll find another fix for it.
Created attachment 323798 [details] Patches suacomp to work with C99 prototypes
Added your patch with a conditional, because I know know if quad is available on older interixes. Thanks.