I am porting over some linux code, and in this code /proc/self/map is being searched for a global variable.

I found -heur-proc-map that looks like it should allow me to apply the same functionality but when I apply to Makefile: 
-fmudflapth to LD_SEARCH_FLAGS and -fmudflapth to CFLAGS1.  The QNX compiler still cannot find heur-proc-map. Is there 
something else im missing to use the argument heur-proc-map? Or is there something else I should be doing to emulate 
searching the virtual memory with /proc/self/map?

Thank you,
LT