#include int func_attr_used_disabled(int val); int func_attr_used_enabled(int val); extern int var_attr_used_enabled; extern int var_attr_used_disabled; int main(int argc, const char **argv){ printf("%d\n", var_attr_used_disabled); printf("%d\n", var_attr_used_enabled); printf("%d\n", func_attr_used_disabled(1)); printf("%d\n", func_attr_used_enabled(1)); return 0; }