hi, i wrote a separate module and just #included it in the file sched-deps.c and called it from the function compute_forward_dependencies() my module works good when run alone i conducted tests for nearly 250 inputs. but when put inside gcc and called from compute_forward_dependencies() during make it shows internal compiler error (segmentation fault) in the file crtstuff.c in the function __do_global_ctors_aux() please someone help me to debug this. -thanks Mugunthan. __________________________________ Do you Yahoo!? Yahoo! Small Business - Try our new resources site! http://smallbusiness.yahoo.com/resources/