libsp: Add build system files.

- Add opteesp deployment.
    This deployment builds libsp as a static library targeting aarch64
    SPs running under OP-TEE.
- Add inport and export interfaces for OP TEE-OS.
- Add opteesp environment files.
- Add shared CMake scripts including GCC compiler support.

Change-Id: Ie8643756d45d0d96822fd98c4c37e7264a7378a1
Signed-off-by: Gyorgy Szing <gyorgy.szing@arm.com>
diff --git a/tools/cmake/common/ExportLibrary.cmake b/tools/cmake/common/ExportLibrary.cmake
new file mode 100644
index 0000000..670f318
--- /dev/null
+++ b/tools/cmake/common/ExportLibrary.cmake
@@ -0,0 +1,72 @@
+#-------------------------------------------------------------------------------
+# Copyright (c) 2020, Arm Limited and Contributors. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+#-------------------------------------------------------------------------------
+
+#[===[.rst:
+.. cmake:command:: export_library
+
+	.. code:: cmake
+
+		export_library(TARGET LIB_NAME INTERFACE_FILES)
+
+	INPUTS:
+
+	``TARGET``
+	The name of an already defined target that corresponds to the library.
+
+	``LIB_NAME``
+	The name of the library.
+
+	``INTERFACE_FILES``
+	List of header files to declare the library's public interface.
+
+#]===]
+function(export_library)
+	set(options  )
+	set(oneValueArgs TARGET LIB_NAME)
+	set(multiValueArgs INTERFACE_FILES)
+	cmake_parse_arguments(MY_PARAMS "${options}" "${oneValueArgs}"
+						"${multiValueArgs}" ${ARGN} )
+
+	if(NOT DEFINED MY_PARAMS_TARGET)
+		message(FATAL_ERROR "export_library: mandatory parameter TARGET not defined!")
+	endif()
+	if(NOT DEFINED MY_PARAMS_LIB_NAME)
+		message(FATAL_ERROR "export_library: mandatory parameter LIB_NAME not defined!")
+	endif()
+
+	# Set default install location if none specified
+	if (CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
+		set(CMAKE_INSTALL_PREFIX ${CMAKE_BINARY_DIR}/install CACHE PATH "location to install build output to." FORCE)
+	endif()
+
+	# Specify export name and destinations for install
+	install(
+		TARGETS ${MY_PARAMS_TARGET}
+		EXPORT ${MY_PARAMS_LIB_NAME}_targets
+		ARCHIVE
+			DESTINATION lib
+		LIBRARY
+			DESTINATION lib
+		PUBLIC_HEADER
+			DESTINATION include
+	)
+
+	# Install library header files files
+	install(
+		FILES ${MY_PARAMS_INTERFACE_FILES}
+		DESTINATION include
+	)
+
+	# Install the export details
+	install(
+		EXPORT ${MY_PARAMS_LIB_NAME}_targets
+		FILE ${MY_PARAMS_LIB_NAME}_targets.cmake
+		NAMESPACE ${MY_PARAMS_LIB_NAME}::
+		DESTINATION lib/cmake
+		COMPONENT ${MY_PARAMS_LIB_NAME}
+	)
+endfunction()