Fixed most compiler errors. Need to do more.

tasks/mm0/include/mmap.h

@@ -9,6 +9,17 @@
 #include <task.h>
 #include <vm_area.h>
 
+/* POSIX-defined mmap flags */
+#define PROT_READ	0x1
+#define PROT_WRITE	0x2
+#define PROT_EXEC	0x4
+#define PROT_NONE	0x0
+
+#define MAP_ANONYMOUS	0x20
+#define MAP_FIXED	0x10
+#define MAP_SHARED	0x01
+#define MAP_PRIVATE	0x02
+
 int do_munmap(void *vaddr, unsigned long size, struct tcb *task);
 
 int do_mmap(struct vm_file *mapfile, unsigned long f_offset, struct tcb *t,