CMake: expose what core needs from a target via MBED_TARGET_CONVERTED-core

Use `${MBED_TARGET_CONVERTED}-core` target for exposing cmsis/device headers to the core. This breaks
the circular dependency between core and  targets.

I also attempt to break building objects per each level in targets hieararchy. The top level target - public facing target, needs to gather sources and create object library.

CMakeLists.txt

@@ -140,6 +140,10 @@ add_subdirectory(drivers)
 add_subdirectory(hal)
 add_subdirectory(platform)
 add_subdirectory(rtos)
+
+# Target provides includes for core to find device.h/cmsis.h or nvic related files
+add_library(${MBED_TARGET_CONVERTED}-core INTERFACE)
+
 add_subdirectory(targets)
 
 # The directories below contain optional target libraries
@@ -152,7 +156,8 @@ add_subdirectory(features EXCLUDE_FROM_ALL)
 add_subdirectory(cmsis/CMSIS_5/CMSIS/RTOS2 EXCLUDE_FROM_ALL)
 add_subdirectory(cmsis/device/rtos EXCLUDE_FROM_ALL)
 
-target_link_libraries(mbed-core-obj PRIVATE ${MBED_TARGET_CONVERTED})
+# TODO: remove this now
+target_link_libraries(mbed-core-obj PRIVATE ${MBED_TARGET_CONVERTED}-core)
 
 #
 # Converts output file of `target` to binary file and to Intel HEX file.

targets/TARGET_Maxim/CMakeLists.txt

@@ -8,7 +8,7 @@ add_subdirectory(TARGET_MAX32625 EXCLUDE_FROM_ALL)
 add_subdirectory(TARGET_MAX32630 EXCLUDE_FROM_ALL)
 
 add_library(mbed-maxim INTERFACE)
-add_library(mbed-maxim-obj OBJECT)
+add_library(mbed-maxim-obj INTERFACE)
 
 target_include_directories(mbed-maxim
     INTERFACE
@@ -16,10 +16,13 @@ target_include_directories(mbed-maxim
 )
 
 target_sources(mbed-maxim-obj
-    PRIVATE
+    INTERFACE
         USBPhy_Maxim.cpp
 )
 
-mbed_attach_object_lib_with_interface_lib(mbed-maxim)
+target_include_directories(${MBED_TARGET_CONVERTED}-core
+    INTERFACE
+        .
+)
 
-target_link_libraries(mbed-maxim-obj PRIVATE mbed-cmsis-cortex-m mbed-core)
+target_link_libraries(mbed-maxim INTERFACE mbed-cmsis-cortex-m mbed-core)

targets/TARGET_Maxim/TARGET_MAX32620C/CMakeLists.txt

@@ -15,7 +15,7 @@ elseif(${MBED_TOOLCHAIN} STREQUAL "GCC_ARM")
 endif()
 
 add_library(mbed-maxim-max32620c INTERFACE)
-add_library(mbed-maxim-max32620c-obj OBJECT)
+add_library(mbed-maxim-max32620c-obj INTERFACE)
 
 target_include_directories(mbed-maxim-max32620c
     INTERFACE
@@ -24,10 +24,20 @@ target_include_directories(mbed-maxim-max32620c
         mxc
 )
 
+target_include_directories(${MBED_TARGET_CONVERTED}-core
+    INTERFACE
+        .
+        device
+        mxc
+)
+
+target_link_libraries(${MBED_TARGET_CONVERTED}-core INTERFACE mbed-cmsis-cortex-m)
+
+
 mbed_set_linker_script(mbed-maxim-max32620c ${CMAKE_CURRENT_SOURCE_DIR}/${LINKER_FILE})
 
 target_sources(mbed-maxim-max32620c-obj
-    PRIVATE
+    INTERFACE
         PeripheralPins.c
         analogin_api.c
         flash_api.c
@@ -81,7 +91,7 @@ target_sources(mbed-maxim-max32620c-obj
 target_link_libraries(mbed-maxim-max32620c 
     INTERFACE 
         mbed-maxim
+        mbed-cmsis-cortex-m
+        mbed-core
 )
 
-mbed_attach_object_lib_with_interface_lib(mbed-maxim-max32620c)
-

targets/TARGET_Maxim/TARGET_MAX32620C/TARGET_MAX32620FTHR/CMakeLists.txt

@@ -2,6 +2,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
 add_library(mbed-max32620fthr INTERFACE)
+add_library(mbed-max32620fthr-obj OBJECT)
 
 target_include_directories(mbed-max32620fthr
     INTERFACE
@@ -9,3 +10,10 @@ target_include_directories(mbed-max32620fthr
 )
 
 target_link_libraries(mbed-max32620fthr INTERFACE mbed-maxim-max32620c)
+
+target_include_directories(${MBED_TARGET_CONVERTED}-core
+    INTERFACE
+        .
+)
+
+target_sources(mbed-max32620fthr-obj PRIVATE $<TARGET_PROPERTY:mbed-max32620fthr,INTERFACE_SOURCES>)