CMake: add mbed-os and mbed-baremetal targets ...

mbed-os consists of mbed-core and mbed-rtos
mbed-baremetal consists of mbed-core

The main change is for mbed-core. Changing from object library to be interface. This way it allows us to do the above to have 2 main targets for users to use.

This should be backward compatible change as mbed-os target we used contains the same files/options as previously set.

CMake: split rtos from core target ...

Add or remove and directories containing source files, header files, and macro definitions that implement RTOS support.
This includes:
- cmsis/CMSIS_5/CMSIS/RTOS2/
- cmsis/device/rtos/
- rtos/source/ConditionVariable.cpp
- rtos/source/Thread.cpp

CMake: Create a mbed-os alias library ...

This ensures that applications which link with the mbed-os
CMake target still work. We want applications that require the OS
to use the mbed-os CMake target as we will be creating a new one
that will include mbed-core and mbed-rtos.

CMake: Rename CMake targets ...

* mbed-os renamed mbed-core
* mbed-os-<COMPONENT> renamed mbed-<COMPONENT>

CMake: fix application config ...

These settings like enable_language should be done in the application and just once.
We hit the issue when you expose sources to an app (interface or public), CMake errors as some of the internal settings have not been configured.

CMake: remove TODO as it is not valid anymore

Update CMake based on new STM32L4 directory structure

CMake: fix for Gcc Arm preprocessing linker file ...

A linker script needs symbols (stack size, app size, etc). They are basic values or defines. Not any array like or string like macros. We should filter these, as they are not valid anyway.

The other option to fix this would be to fix all the macros but I dont think it is needed as these config values won't be used in the linker script anyway.

Not allowed in ld files macros with spaces, like MACRO={0, 2, 3} or MACRO=(4 * 2000).

CMake: Restore rtos api and netsocket presence macro names ...

The old tools rely on the old names to build

CMake: remove string.h in STM32 usb, already included (#13773)

CMake: Fix BLE private address linker error ...

List newly added files in CMake input source files.

CMake: Fix travis fetch PR (#13763) ...

Either fetch TRAVIS_COMMIT or the entire pull request (depending on the TRAVIS_PULL_REQUEST environment variable).

CMake: Replace tested BLE application in CI description ...

BLE_Button, which was the previously tested BLE example, is
being removed in mbed-os-example-ble. Replace it with BLE_LED.

cmake: fix present inclusion ...

We use only _PRESENT macros for components if they are enabled. Use the same in
the mbed.h file or anywhere else.

CMake: replace usage of the mbed_add_cmake_directory_if_labels() function (#13754) ...

Directories that start with special prefixes (TARGET_, FEATURE_, COMPONENT_)  are added to the build based on Mbed target configuration from targets.json instead of calling utility function mbed_add_cmake_directory_if_labels().

CMake: Componentize Mbed OS into multiple CMake targets (#13732) ...

Aside from the core mbed-os CMake target, a number of targets have been created so they can optionally be included by application executables that require them using `target_link_libraries()`.

Co-authored-by: Martin Kojtal <martin.kojtal@arm.com>
Co-authored-by: Rajkumar Kanagaraj <rajkumar.kanagaraj@arm.com>

CMake: Add a function to generate executable artifacts with memap (#13695) ...

- Add linker option to generate map file for GCC_ARM and ARM toolchain
- Add mbed_generate_map_file function to call memap.py (parse the map
file).
- Add mbed_generate_executable function to generate executable artifacts with a memory map table

CMake: Add support for NUCLEO_F401RE

CMake: Fix TFM targets build ...

Add linking time pre-processor macro DOMAIN_NS
for TFM targets and TrustZone non secure targets.

CMake: Fix location of M33 exception handler source file

CMake: Add support for printf lib selection

CMake: Add support for C lib selection ...

Configure the selected toolchain for the selected C library

CMake design: update to the latest version of feature-cmake branch (#13614) ...

We made changes like tools/cmake folder change, removed app.cmake.

CMake: Move modules under tools subdirectory

CMake: Add background and future plans to README (#13589)

CMake: Fix DISCO_L475VG_IOT01A ARM toolchain support ...

Correct location of startup code and linker file.

CMake: Fix ARM toolchain configuration ...

mbed_generate_gcc_options_for_linker is to
be called only when GCC_ARM is selected.

CMake: Fix build failure due to BLE dir changes

CMake: Remove TOOLCHAIN_ARM_STD dir for TARGET_STM32F439xI

CMake: Revert mbed-trace CMake input source file to match upstream repository (#13590) ...

As there is currently no mbed-trace library, statements related to that
target have been commented out.