initial commit

FIRMWARE/errno.c

@@ -0,0 +1,11 @@
+
+// Sometimes __errno is not linked, here is a dummy replacement.
+// Note that __errno is a function that returns a pointer to the
+// actual __errno (this is for multithreading). Made me bang my 
+// head to the wall (and made tinyraytracer crash because powf()
+// was *calling* __errno).
+
+int* __errno()  {
+   static int val = 0;
+   return &val;
+}