CMake: Add support for platform dir

platform/CMakeLists.txt

@@ -0,0 +1,11 @@
+# Copyright (c) 2020 ARM Limited. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+add_subdirectory(cxxsupport)
+add_subdirectory(source)
+
+target_include_directories(mbed-os
+    PUBLIC
+        ${CMAKE_CURRENT_SOURCE_DIR}
+        ${CMAKE_CURRENT_SOURCE_DIR}/internal
+)

platform/cxxsupport/CMakeLists.txt

@@ -0,0 +1,12 @@
+# Copyright (c) 2020 ARM Limited. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+target_include_directories(mbed-os
+    PUBLIC
+        ${CMAKE_CURRENT_SOURCE_DIR}
+)
+
+target_sources(mbed-os
+    PRIVATE
+        mstd_mutex.cpp
+)

platform/source/CMakeLists.txt

@@ -0,0 +1,47 @@
+# Copyright (c) 2020 ARM Limited. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+mbed_add_cmake_directory_if_labels("TARGET")
+add_subdirectory(minimal-printf)
+
+target_include_directories(mbed-os
+    PUBLIC
+        ${CMAKE_CURRENT_SOURCE_DIR}
+)
+
+target_sources(mbed-os
+    PRIVATE
+        ATCmdParser.cpp
+        CThunkBase.cpp
+        CriticalSectionLock.cpp
+        DeepSleepLock.cpp
+        FileBase.cpp
+        FileHandle.cpp
+        FilePath.cpp
+        FileSystemHandle.cpp
+        LocalFileSystem.cpp
+        Stream.cpp
+        SysTimer.cpp
+        mbed_alloc_wrappers.cpp
+        mbed_application.c
+        mbed_assert.c
+        mbed_atomic_impl.c
+        mbed_board.c
+        mbed_critical.c
+        mbed_error.c
+        mbed_error_hist.c
+        mbed_interface.c
+        mbed_mem_trace.cpp
+        mbed_mktime.c
+        mbed_mpu_mgmt.c
+        mbed_os_timer.cpp
+        mbed_poll.cpp
+        mbed_power_mgmt.c
+        mbed_retarget.cpp
+        mbed_rtc_time.cpp
+        mbed_sdk_boot.c
+        mbed_semihost_api.c
+        mbed_stats.c
+        mbed_thread.cpp
+        mbed_wait_api_no_rtos.c
+)

platform/source/TARGET_CORTEX_M/CMakeLists.txt

@@ -0,0 +1,24 @@
+# Copyright (c) 2020 ARM Limited. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+
+function(_mbed_set_assembly_source)
+    if(${MBED_TOOLCHAIN} STREQUAL "GCC_ARM")
+        target_sources(mbed-os PRIVATE TOOLCHAIN_GCC/except.S)
+    elseif(${MBED_TOOLCHAIN} STREQUAL "ARM")
+        target_sources(mbed-os PRIVATE TOOLCHAIN_ARM/except.S)
+    elseif(${MBED_TOOLCHAIN} STREQUAL "IAR")
+        target_sources(mbed-os
+            PRIVATE
+                TOOLCHAIN_IAR/except.S
+                TOOLCHAIN_IAR/cmain.S
+        )
+    endif()
+endfunction()
+
+_mbed_set_assembly_source()
+
+target_sources(mbed-os
+    PRIVATE
+        mbed_fault_handler.c
+)

platform/source/minimal-printf/CMakeLists.txt

@@ -0,0 +1,14 @@
+# Copyright (c) 2020 ARM Limited. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+target_include_directories(mbed-os
+    PUBLIC
+        ${CMAKE_CURRENT_SOURCE_DIR}
+)
+
+target_sources(mbed-os
+    PRIVATE
+        mbed_printf_armlink_overrides.c
+        mbed_printf_implementation.c
+        mbed_printf_wrapper.c
+)