Move the strnlen implementation into common so its available to any
libc that may not implement strnlen.
Signed-off-by: Kumar Gala <kumar.gala@intel.com>
Introduce a place to share implementations of libc functions that
are needed by different libc versions. Place time() in this common
location so it can be shared when building for either minimal libc or
armclang libc.
Signed-off-by: Kumar Gala <kumar.gala@intel.com>
Fixes: #40389
Update toolchain handling to use zephyr_get() to ensure consistent
handling of CMake cache variables, environment variable, and CMake
local variables.
Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>
Support for ARM Compiler C library.
This commit add support for the ARM Compiler C libary in:
- Kconfig
- libc/armstdc
A new Kconfig symbol is added to allow a toolchain to specify if they
support linking with the minimal C library.
Also the CMake variable `TOOLCHAIN_HAS_NEWLIB` is exported to Kconfig
so that CONFIG_NEWLIB_LIBS can only be enabled if the toolchain has
newlib.
The armclang toolchain selects the CMake scatter file generator and
disables support for the LD linker template which is not supported by
armlink.
For the ARM Compiler C library, a corresponding lib/libc/armstc/ folder
with a minimal implementation to work with the ARM Compiler C library
is added.
Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>
When using ARMClang linker and scatter files (armlink) then all
libraries are linked as object libraries using `$<TARGET_OBJECTS:lib>`.
CMake version 3.20 only has limited support for such linking:
> Referencing $<TARGET_OBJECTS> in target_link_libraries calls worked
> in versions of CMake prior to 3.21 for some cases, but was not fully
> supported.
One of those cases that do not work is Unix Makefiles generators.
As only Ninja is currently verified to work, this commit will check the
CMake version in use and the generator, and if CMake version <=3.21 is
used with non-Ninja generator then an error is raised informing user
to either use Ninja generator or update CMake.
As the Ninja generator has been confirmed to work as expected, then that
generator is accepted with CMake 3.20 and older.
Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>
This is the initial support for the armclang compiler together with the
armlink linker.
Introduced in this commit:
- armclang compiler support
- armlink linker support
- armlink scatter file generator for scatter loading
- dual pass linker script generation
Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>
