Build: Update app_broker build

Update app_broker build to make dependencies more stable.

  - Sort NS library folder structure.
    Move common library folders out of app_broker. Place them under lib
    folder. Move CMSIS to lib/ext.
    It is expected that users can re-use those library in other NS
    integration with TF-M.
  - NS libraries depend on each other and therefore the dependencies are
    complicated. Build those NS libraries under app_broker to more
    easily sort out dependencies. Remove build files from library
    folders.

Signed-off-by: David Hu <david.hu@arm.com>
Change-Id: I8c2ff7bbec6c03738b9cbe49fd286a5147293ba5
diff --git a/lib/ext/CMSIS/CMakeLists.txt b/lib/ext/CMSIS/CMakeLists.txt
new file mode 100644
index 0000000..f994d55
--- /dev/null
+++ b/lib/ext/CMSIS/CMakeLists.txt
@@ -0,0 +1,62 @@
+#-------------------------------------------------------------------------------
+# Copyright (c) 2023, Arm Limited. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+#-------------------------------------------------------------------------------
+#
+# This CMake script used in a split build only. In the legacy 'sinlge' build
+# this file is ignoed. Please don't be confused.
+#
+cmake_minimum_required(VERSION 3.15)
+cmake_policy(SET CMP0079 NEW)
+
+add_library(CMSIS_5_RTX_V8MMN STATIC IMPORTED GLOBAL)
+add_library(CMSIS_5_RTX_V8MMFN STATIC IMPORTED GLOBAL)
+add_library(CMSIS_5_RTX_V8MBN STATIC IMPORTED GLOBAL)
+add_library(CMSIS_5_RTX_CM3 STATIC IMPORTED GLOBAL)
+
+set(CMSIS_LIBS_DIR ${CMAKE_CURRENT_LIST_DIR}/RTOS2/RTX/Library)
+
+if ("${CMAKE_C_COMPILER_ID}" STREQUAL GNU)
+    set_target_properties(CMSIS_5_RTX_V8MMN  PROPERTIES IMPORTED_LOCATION ${CMSIS_LIBS_DIR}/GCC/libRTX_V8MMN.a)
+    set_target_properties(CMSIS_5_RTX_V8MMFN PROPERTIES IMPORTED_LOCATION ${CMSIS_LIBS_DIR}/GCC/libRTX_V8MMFN.a)
+    set_target_properties(CMSIS_5_RTX_V8MBN  PROPERTIES IMPORTED_LOCATION ${CMSIS_LIBS_DIR}/GCC/libRTX_V8MBN.a)
+    set_target_properties(CMSIS_5_RTX_CM3    PROPERTIES IMPORTED_LOCATION ${CMSIS_LIBS_DIR}/GCC/libRTX_CM3.a)
+elseif("${CMAKE_C_COMPILER_ID}" STREQUAL ARMClang)
+    set_target_properties(CMSIS_5_RTX_V8MMN  PROPERTIES IMPORTED_LOCATION ${CMSIS_LIBS_DIR}/ARM/RTX_V8MMN.lib)
+    set_target_properties(CMSIS_5_RTX_V8MMFN PROPERTIES IMPORTED_LOCATION ${CMSIS_LIBS_DIR}/ARM/RTX_V8MMFN.lib)
+    set_target_properties(CMSIS_5_RTX_V8MBN  PROPERTIES IMPORTED_LOCATION ${CMSIS_LIBS_DIR}/ARM/RTX_V8MBN.lib)
+    set_target_properties(CMSIS_5_RTX_CM3    PROPERTIES IMPORTED_LOCATION ${CMSIS_LIBS_DIR}/ARM/RTX_CM3.lib)
+elseif("${CMAKE_C_COMPILER_ID}" STREQUAL IAR)
+    add_library(CMSIS_5_RTX_V81MMN STATIC IMPORTED GLOBAL)
+    set_target_properties(CMSIS_5_RTX_V8MMN  PROPERTIES IMPORTED_LOCATION ${CMSIS_LIBS_DIR}/IAR/RTX_V8MMN.a)
+    set_target_properties(CMSIS_5_RTX_V81MMN PROPERTIES IMPORTED_LOCATION ${CMSIS_LIBS_DIR}/IAR/RTX_V81MMN.a)
+    set_target_properties(CMSIS_5_RTX_V8MMFN PROPERTIES IMPORTED_LOCATION ${CMSIS_LIBS_DIR}/IAR/RTX_V8MMFN.a)
+    set_target_properties(CMSIS_5_RTX_V8MBN  PROPERTIES IMPORTED_LOCATION ${CMSIS_LIBS_DIR}/IAR/RTX_V8MBN.a)
+    set_target_properties(CMSIS_5_RTX_CM3    PROPERTIES IMPORTED_LOCATION ${CMSIS_LIBS_DIR}/IAR/RTX_CM3.a)
+else()
+    message(FATAL_ERROR "${CMAKE_C_COMPILER_ID} does not have CMSIS RTX static libraries set up")
+endif()
+
+add_library(RTX_OS INTERFACE)
+
+target_sources(RTX_OS
+    INTERFACE
+        RTOS2/RTX/Config/RTX_Config.c
+        RTOS2/RTX/Source/rtx_lib.c
+)
+
+target_include_directories(RTX_OS
+    INTERFACE
+        Core/Include
+        RTOS2/Include
+        RTOS2/RTX/Include
+        RTOS2/RTX/Config
+)
+
+target_link_libraries(RTX_OS
+    INTERFACE
+        CMSIS_5_RTX_V8MMN
+        platform_ns         # for cmsis_compiler.h
+)