Hi, 'vect_dump' is variable of FILE type. That is declared in tree-vectorizer.c When I tried to access it from the file tree-scalar-evolution.c, I got installation error. My question is how to enable vect_dump variable access-able in every file including tree-scalar-evolution.c, toplev.c....passes.c........etc In which file I have to declare that variable? If I move that declaration, to other file, from tree-vectorizer.c , will I need to declare that variable as extern in tree-vectorizer.c???? --------------------------------------------------------- ../../gcc-4.1.2/gcc/tree-scalar-evolution.c -o tree-scalar-evolution.o ../../gcc-4.1.2/gcc/tree-scalar-evolution.c: In function `get_loop_exit_condition': ../../gcc-4.1.2/gcc/tree-scalar-evolution.c:986: error: `vect_dump' undeclared (first use in this function) ../../gcc-4.1.2/gcc/tree-scalar-evolution.c:986: error: (Each undeclared identifier is reported only once ../../gcc-4.1.2/gcc/tree-scalar-evolution.c:986: error: for each function it appears in.) make[2]: *** [tree-scalar-evolution.o] Error 1 make[2]: Leaving directory `/users/pg05/ranjithk/gcc/obj/gcc' make[1]: *** [stage1_build] Error 2 make[1]: Leaving directory `/users/pg05/ranjithk/gcc/obj/gcc' make: *** [bootstrap] Error 2 ___________________________________________________________ Yahoo! Mail is the world's favourite email. Don't settle for less, sign up for your free account today http://uk.rd.yahoo.com/evt=44106/*http://uk.docs.yahoo.com/mail/winter07.html