Radix cross Linux Toolchains for ARC architecture

Index: README.md
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+
+
+ARC GNU Toolchains
+==================
+
+This repository contains Synopsys ARC GNU Toolchains building procedures described
+at https://github.com/foss-for-synopsys-dwc-arc-processors/toolchain/wiki page.
+
+The default destination path for installation is defined by **TOOLCHAINS_BASE_PATH** variable
+in the [build-system/config.mk](https://csvn.radix.pro/radix/toolchains-arc/trunk/build-system/config.mk)
+file. The access permissions should be given to developer by the superuser:
+
+```Bash
+$ sudo mkdir -p /opt/toolchain
+$ sudo chown -R developer:developers /opt/toolchain
+```
+
+To build all toolchains we have to run following command in the *products* directory:
+
+```Bash
+$ cd products
+$ make -j32 all
+```
+
+Additional information can be found in the
+[*doc/README*](https://csvn.radix.pro/radix/toolchains-arc/trunk/doc/README) file.
+
+
+Copyright and license
+---------------------
+
+Code and documentation copyright 2009-2020 Andrey V. Kosteltsev.
+Code and documentation released under
+[the MIT License](https://csvn.radix.pro/radix/toolchains-arc/trunk/LICENSE).
+