zephyr/tests/posix/common/testcase.yaml

common:
  tags: posix
  min_ram: 64
  arch_exclude: posix
tests:
  portability.posix:
    extra_configs:
      - CONFIG_NEWLIB_LIBC=n
  portability.posix.newlib:
    filter: TOOLCHAIN_HAS_NEWLIB == 1
    extra_configs:
      - CONFIG_NEWLIB_LIBC=y