CMake: Refactor Toshiba targets

Refactor all Toshiba targets to be CMake buildsystem targets. This removes
the need for checking MBED_TARGET_LABELS repeatedly and allows us to be
more flexible in the way we include MBED_TARGET source in the build.

A side effect of this is it will allow us to support custom targets
without breaking the build for 'standard' targets, as we use CMake's
standard mechanism for adding build rules to the build system, rather
than implementing our own layer of logic to exclude files not needed for
the target being built. Using this approach, if an MBED_TARGET is not
linked to using `target_link_libraries` its source files will not be
added to the build. This means custom target source can be added to the
user's application CMakeLists.txt without polluting the build system
when trying to compile for a standard MBED_TARGET.

Author: harrisonmutai-arm

targets/TARGET_TOSHIBA/CMakeLists.txt

@@ -1,13 +1,12 @@
-# Copyright (c) 2020 ARM Limited. All rights reserved.
+# Copyright (c) 2020-2021 ARM Limited. All rights reserved.
 # SPDX-License-Identifier: Apache-2.0
 
-if("TMPM46B" IN_LIST MBED_TARGET_LABELS)
-    add_subdirectory(TARGET_TMPM46B)
-elseif("TMPM4G9" IN_LIST MBED_TARGET_LABELS)
-    add_subdirectory(TARGET_TMPM4G9)
-endif()
+add_subdirectory(TARGET_TMPM46B EXCLUDE_FROM_ALL)
+add_subdirectory(TARGET_TMPM4G9 EXCLUDE_FROM_ALL)
 
-target_include_directories(mbed-core
+add_library(mbed-toshiba INTERFACE)
+
+target_include_directories(mbed-toshiba
     INTERFACE
         .
 )

targets/TARGET_TOSHIBA/TARGET_TMPM46B/CMakeLists.txt

@@ -1,4 +1,4 @@
-# Copyright (c) 2020 ARM Limited. All rights reserved.
+# Copyright (c) 2020-2021 ARM Limited. All rights reserved.
 # SPDX-License-Identifier: Apache-2.0
 
 if(${MBED_TOOLCHAIN} STREQUAL "ARM")
@@ -9,16 +9,16 @@ elseif(${MBED_TOOLCHAIN} STREQUAL "GCC_ARM")
     set(STARTUP_FILE device/TOOLCHAIN_GCC_ARM/startup_TMPM46b.S)
 endif()
 
-set_property(GLOBAL PROPERTY MBED_TARGET_LINKER_FILE ${CMAKE_CURRENT_SOURCE_DIR}/${LINKER_FILE})
+add_library(mbed-tmpm46b INTERFACE)
 
-target_include_directories(mbed-core
+target_include_directories(mbed-tmpm46b
     INTERFACE
         .
         device
         Periph_Driver/inc
 )
 
-target_sources(mbed-core
+target_sources(mbed-tmpm46b
     INTERFACE
         analogin_api.c
         flash_api.c
@@ -52,3 +52,7 @@ target_sources(mbed-core
 
         ${STARTUP_FILE}
 )
+
+mbed_set_linker_script(mbed-tmpm46b ${CMAKE_CURRENT_SOURCE_DIR}/${LINKER_FILE})
+
+target_link_libraries(mbed-tmpm46b INTERFACE mbed-toshiba)

targets/TARGET_TOSHIBA/TARGET_TMPM4G9/CMakeLists.txt

@@ -1,4 +1,4 @@
-# Copyright (c) 2020 ARM Limited. All rights reserved.
+# Copyright (c) 2020-2021 ARM Limited. All rights reserved.
 # SPDX-License-Identifier: Apache-2.0
 
 if(${MBED_TOOLCHAIN} STREQUAL "ARM")
@@ -9,16 +9,16 @@ elseif(${MBED_TOOLCHAIN} STREQUAL "GCC_ARM")
     set(STARTUP_FILE device/TOOLCHAIN_GCC_ARM/startup_TMPM4G9.S)
 endif()
 
-set_property(GLOBAL PROPERTY MBED_TARGET_LINKER_FILE ${CMAKE_CURRENT_SOURCE_DIR}/${LINKER_FILE})
+add_library(mbed-tmpm4g9 INTERFACE)
 
-target_include_directories(mbed-core
+target_include_directories(mbed-tmpm4g9
     INTERFACE
         .
         device
         Periph_Driver/inc
 )
 
-target_sources(mbed-core
+target_sources(mbed-tmpm4g9
     INTERFACE
         analogin_api.c
         analogout_api.c
@@ -54,3 +54,7 @@ target_sources(mbed-core
 
         ${STARTUP_FILE}
 )
+
+mbed_set_linker_script(mbed-tmpm4g9 ${CMAKE_CURRENT_SOURCE_DIR}/${LINKER_FILE})
+
+target_link_libraries(mbed-tmpm4g9 INTERFACE mbed-toshiba)