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+
+SGX Embedded Systems DDK for the Linux kernel.
+Copyright (C) Imagination Technologies Ltd. All rights reserved.
+======================================================================
+
+This file covers how to build and install the Imagination Technologies
+SGX DDK for the Linux kernel.
+
+
+Build System Environment Variables
+-------------------------------------------
+
+The SGX DDK Build scripts depend on a number of environment variables
+being setup before compilation or installation of DDK software can
+commence:
+
+$DISCIMAGE
+The DDK Build scripts install files to the location specified by the
+DISCIMAGE environment variable, when the make install target is used.
+This should point to the target filesystem.
+$ export DISCIMAGE=/path/to/filesystem
+
+$KERNELDIR
+When building the SGX DDK kernel module, the build needs access
+to the headers of the Linux kernel
+$ export KERNELDIR=/path/to/kernel
+
+$PATH
+If a cross compiler is being used make sure the PATH environment variable
+includes the path to the toolchain
+$ export PATH=$PATH:/path/to/toolchain
+
+$CROSS_COMPILE
+Since the SGX DDK Build scripts are geared toward a cross-compilation
+workflow, the CROSS_COMPILE environment variable needs to be set
+$ export CROSS_COMPILE=toolchain-prefix-
+
+
+Build and Install Instructions
+-------------------------------------------
+
+The SGX DDK configures different target builds within directories under
+eurasiacon/build/linux/.
+
+The supported build targets are:
+
+	all		Makes everything
+	clean	Removes all intermediate files created by a build.
+	clobber	Removes all binaries for all builds as well.
+	install	Runs the install script generated by the build.
+
+The following variables may be set on the command line to influence a build.
+
+	BUILD	The type of build being performed.
+			Alternatives are release, timing or debug.
+	CFLAGS	Build dependent	optimisations and debug information flags.
+	SILENT	Determines whether text of commands is produced during build.
+
+To build for, change to the appropriate target directory, e.g.:
+$ cd eurasiacon/build/linux/platform/kbuild
+
+Issue the make command:
+$ make BUILD=debug all
+
+The DDK software must be installed by the root user.  Become the root user:
+$ su
+
+Install the DDK software:
+$ make install
+
+Become an ordinary user again:
+$ exit