tools: fix SPDX identifiers

Merge pull request #12278 from rajkan01/feature_rename_default_lib ...

Rename "default_lib" to "c_lib".

Merge pull request #11904 from jamesbeyond/HW_gcov ...

TOOLS: enable build greentea test coverage for HW

Rename "default_lib" to "c_lib".

TOOLS: add some inline comments

Fixed the build tools test case failure,incorporated review comments

Enabling small C library option and deprecating uARM toolchain ...

- By default, Mbed OS build tools use standard C library for all supported toolchains.
   It is possible to use smaller C libraries by overriding the "target.default_lib" option
   with "small". This option is only currently supported for the GCC_ARM toolchain.
   This override config option is now extended in the build tool for ARM toolchain.
 - Add configuration option to specify libraries supported for each toolchain per targets.
 - Move __aeabi_assert function from rtos to retarget code so it’s available for bare metal.
 - Use 2 memory region model for ARM toolchain scatter file for the following targets:
   NUCLEO_F207ZG, STM32F411xE, STM32F429xI, NUCLEO_L073RZ, STM32F303xE
 - Add a warning message in the build tools to deprecate uARM toolchain.
 - NewLib-Nano C library is not supporting floating-point and printf with %hhd,%hhu,%hhX,%lld,%llu,%llX
   format specifier so skipping those green tea test cases.

Merge pull request #11891 from hugueskamba/hk-enable-minimal-printf-in-tools ...

minimal-printf: Enable using a target configuration parameter

minimal-printf: Enable using a target configuration parameter

Tools: check for GCC 9, rather than 6 ...

Planning to update to supporting GCC 9 as found in GNU Tools for Arm
Embedded Processors 9-2019q4-major.

Newer GCC in particular supports ARMv8-M security extensions, and
link-time optimisation - two areas of interest.

Should be no code changes required, but need to change the warning in
the toolchain script.

TOOLS: enable build greentea test with gcov options

Update gcc.py

Update gcc.py for preprocessing in linker script ...

To fix https://github.com/ARMmbed/mbed-os/issues/11214, we need this update. :-)

Permit non-TrustZone ARMv8 build ...

Change the heuristic for selection of CMSE in the tools python, so that
a non-TrustZone ARMv8 build can happen.

Ideally we would have more direct flagging in the targets, but this
refines the heuristic so the necessary behaviour can be easily
achieved.

* DOMAIN_NS=1 is based purely on the `-NS` suffix on the core name.

* Enabling CMSE in the compiler and outputting a secure import library
  is now enabled when the core doesn't have an `-NS` suffix by either
  the target label `TFM` being present or the flag `trustzone` being set.

This covers the existing ARMv8-M behaviour - TF-M builds have the TFM
label, as per its documentation; M2351 secure builds have no explicit
flagging, so we ensure that the M2351_NS target has the trustzone flag
set, and the out-of-tree secure target inherits that.

Tools: Add "Cortex-M33E" option ...

There was a gap in our pattern - we didn't offer M33 with DSP Extension
but no floating-point.

Correct some CPU selections in tools ...

* For ARMC6, core types `Cortex-M4` and `Cortex-M7` did not explicitly
  add `--fpu=none`, so it defaulted to assuming FPU present. This would
  cause a compilation error if the target's cmsis.h had `__FPU_PRESENT`
  defined to 0.

* For GCC, `Cortex-M33FE` did not include `+dsp` in the architecture
  selection.

* For ARMC5 and ARMC6, `Cortex-M0+` did not pass `M0plus` to the
  non-Clang tools.

Fix pylint warnings in gcc.py except for the long regex

Move toolchain base class into another file

Simplify hook tool implementation ...

The "hook tools" were capable of hooking into many commands run by the build system.
To my knowlage, the only hook is the "post-build-hook". The post build hook could be
easier to reason about if the implementation is specialized for just post-build
hooking.

This commit make it much easier to point out where post build hooks are called by
making the call explicit.

Merge pull request #9619 from deepikabhavnani/typo_correct ...

Correct the dsp flag from no_dsp to nodsp

Correct the dsp flag from no_dsp to nodsp

Fix cortex-m33-S compile error ...

Compilation error was due to due to bug in gcc.py

Merge pull request #9480 from deepikabhavnani/core_arch_v8m ...

Refactor core optional parameters (FPU + DSP + Security extensions)

Added encoding to version check for Py3 compat

Change if statements to lookup tables

Change DSP variant symbol to `E` from `D`(d-double floating point)

GCC_ARM: Strip the -NS from core option before setting floating point options

Use core arch for setting secure/non-secure flags

Add core option for Cortex-M33 with DSP enabled ...

Signed-off-by: Deepika Bhavnani <Deepika.Bhavnani@arm.com>
Signed-off-by: Mahesh Mahadevan <mahesh.mahadevan@nxp.com>

Adding arch option instead MCPU for no dsp and no fpu support ...

No FPU option is valid, but supported only for 8.x releases, with 7.x release
+nofp gives build errors.