CMake: link error when using cmake and L475 + small CLIB

[MarceloSalazar]

Description of defect

Link error when trying to use the small CLIB with cmake

armclang: error: no such file or directory: '"--library_type=microlib"'
[16/260] Building C object CMakeFiles\mbed-os-example-blinky.dir\mbed-os\cmsis\CMSIS_5\CMSIS\RTOS2\RTX\Source\rtx_kernel.o
ninja: build stopped: subcommand failed.

Target(s) affected by this defect ?

DISCO L475

Toolchain(s) (name and version) displaying this defect ?

Arm Compiler 6

What version of Mbed-os are you using (tag or sha) ?

d64133e

What version(s) of tools are you using. List all that apply (E.g. mbed-cli)

NA

How is this defect reproduced ?

• Import mbed-os-example-blinky
• Switch app and Mbed OS to feature-cmake
• Configure: mbedtools configure -m DISCO_L475VG_IOT01A -t ARM
• Update .mbedbuild\mbed_config.cmake and enable the small CLIB instead of std: set(MBED_C_LIB "small" CACHE STRING "")
• Compile mkdir build && cd build && cmake .. -GNinja && cmake --build .

@0xc0170 @hugueskamba

[0xc0170]

We will look at this

cc @rajkan01

[ciarmcom]

@MarceloSalazar thank you for raising this issue.Please take a look at the following comments:

We cannot automatically identify a release based on the version of Mbed OS that you have provided.
Please provide either a single valid sha of the form #abcde12 or #3b8265d70af32261311a06e423ca33434d8d80de
or a single valid release tag of the form mbed-os-x.y.z .
E.g. 'feature-cmake' has not been matched as a valid tag or sha.
NOTE: If there are fields which are not applicable then please just add 'n/a' or 'None'.This indicates to us that at least all the fields have been considered.
Please update the issue header with the missing information, the issue will not be mirroredto our internal defect tracking system or investigated until this has been fully resolved.

[ciarmcom]

Thank you for raising this detailed GitHub issue. I am now notifying our internal issue triagers.
Internal Jira reference: https://jira.arm.com/browse/IOTOSM-2646

[hugueskamba]

@MarceloSalazar
I am looking at it but please note that you cannot build mbed-os-example-blinky with the small library because Microlib (and newlib-nano) are not thread-safe and the application uses threads.

[MarceloSalazar]

OK, can we try with Blinky baremetal?
I'd like to make sure the right cmake config files are in place for us to use the minimal clib. Thanks.

[hugueskamba]

OK, can we try with Blinky baremetal?
I'd like to make sure the right cmake config files are in place for us to use the minimal clib. Thanks.

Blinky baremetal work is in progress. Regardless of that, Blinky should have at least built as the option used to select Microlib is correct as per documentation and I do remember testing it when it was implemented.