undefined reference to __ssputws_r with --specs=nano.specs

Hi,

I noticed that a lot of testcases fails when running the GCC testsuite 
with --specs=nano.specs.
Below is an example that fails with --specs=nano.specs:

$ /build/13-head-bin/bin/arm-none-eabi-g++ 
/build/gcc13_src/gcc/testsuite/g++.dg/coroutines/pr100611.C -std=c++20 
--specs=nosys.specs -o /dev/null --specs=nano.specs
/build/13-head-bin/bin/../lib/gcc/arm-none-eabi/13.2.1/../../../../arm-none-eabi/bin/ld: 
/build/13-head-bin/bin/../lib/gcc/arm-none-eabi/13.2.1/../../../../arm-none-eabi/lib/libc_nano.a(libc_a-svfwprintf.o): 
in function `_svfwprintf_r':
(.text._svfwprintf_r+0xd8): undefined reference to `__ssputws_r'
/build/13-head-bin/bin/../lib/gcc/arm-none-eabi/13.2.1/../../../../arm-none-eabi/bin/ld: 
(.text._svfwprintf_r+0x834): undefined reference to `__ssputws_r'
/build/13-head-bin/bin/../lib/gcc/arm-none-eabi/13.2.1/../../../../arm-none-eabi/bin/ld: 
(.text._svfwprintf_r+0x85c): undefined reference to `__ssputws_r'
/build/13-head-bin/bin/../lib/gcc/arm-none-eabi/13.2.1/../../../../arm-none-eabi/bin/ld: 
(.text._svfwprintf_r+0x8a8): undefined reference to `__ssputws_r'
/build/13-head-bin/bin/../lib/gcc/arm-none-eabi/13.2.1/../../../../arm-none-eabi/bin/ld: 
(.text._svfwprintf_r+0x8dc): undefined reference to `__ssputws_r'
/build/13-head-bin/bin/../lib/gcc/arm-none-eabi/13.2.1/../../../../arm-none-eabi/bin/ld: 
/build/13-head-bin/bin/../lib/gcc/arm-none-eabi/13.2.1/../../../../arm-none-eabi/lib/libc_nano.a(libc_a-svfwprintf.o):(.text._svfwprintf_r+0x900): 
more undefined references to `__ssputws_r' follow
collect2: error: ld returned 1 exit status


The newlib nano is configured with:

--disable-newlib-supplied-syscalls
--enable-newlib-reent-check-verify
--enable-newlib-reent-small
--enable-newlib-retargetable-locking
--disable-newlib-fvwrite-in-streamio
--disable-newlib-fseek-optimization
--disable-newlib-wide-orient
--enable-newlib-nano-malloc
--disable-newlib-unbuf-stream-opt
--enable-lite-exit
--enable-newlib-global-atexit
--enable-newlib-nano-formatted-io
--disable-nls


Is it expected that the symbol __ssputws_r is referenced but not 
provided when (I presume this is the reason) 
--enable-newlib-nano-formatted-io and --disable-newlib-wide-orient is used?

Kind regards,
Torbjörn