Radix cross Linux Toolchains

Index: README
===================================================================
--- README	(nonexistent)
+++ README	(revision 5)
@@ -0,0 +1,24 @@
+
+build:
+=====
+
+cd products && make -j32 all
+
+make targets:
+============
+
+tree_clean      - clean whole tree including dist and sources(.makefile stamps) directories but
+                  !!!NOT CLEAN downloaded sources!!!
+
+downloads_clean - remove downloaded sources in sources directory
+
+
+NOTE:
+====
+  Directory names in products folder shouldn't match with any toolchain name.
+  For example, if we have toolchain name 'x86_64-glibc' then directory name
+  for this toolchain should be at least 'X86_64-glibc'.
+
+NOTE JZ47XX GLibc:
+  The -O3 optimisation for glibc made wrong executables. We have to use -O2 only.
+