Missing C++ symbols on arm-none-eabi gcc 14

[offa]

arm-none-eabi gcc 14 fails due to missing symbols:

 [ 23%] Building CXX object system/src/CMakeFiles/newlib.dir/newlib/_cxx.cpp.obj
/__w/stm32-eth/stm32-eth/system/src/newlib/_cxx.cpp: In function 'void __gnu_cxx::__verbose_terminate_handler()':
/__w/stm32-eth/stm32-eth/system/src/newlib/_cxx.cpp:29:5: error: 'abort' was not declared in this scope; did you mean 'std::abort'?
   29 |     abort();
      |     ^~~~~
      |     std::abort
In file included from /__w/stm32-eth/stm32-eth/system/src/newlib/_cxx.cpp:13:
/opt/arm-none-eabi/arm-none-eabi/include/c++/14.2.1/cstdlib:58:19: note: 'std::abort' declared here
   58 |   extern "C" void abort(void) _GLIBCXX_NOTHROW _GLIBCXX_NORETURN;
      |                   ^~~~~
/__w/stm32-eth/stm32-eth/system/src/newlib/_cxx.cpp: In function 'void __cxa_pure_virtual()':
/__w/stm32-eth/stm32-eth/system/src/newlib/_cxx.cpp:45:5: error: 'abort' was not declared in this scope; did you mean 'std::abort'?
   45 |     abort();
      |     ^~~~~
      |     std::abort
/opt/arm-none-eabi/arm-none-eabi/include/c++/14.2.1/cstdlib:58:19: note: 'std::abort' declared here
   58 |   extern "C" void abort(void) _GLIBCXX_NOTHROW _GLIBCXX_NORETURN;
      |                   ^~~~~
/__w/stm32-eth/stm32-eth/system/src/newlib/_cxx.cpp: In function 'void __gnu_cxx::__verbose_terminate_handler()':
/__w/stm32-eth/stm32-eth/system/src/newlib/_cxx.cpp:30:3: warning: 'noreturn' function does return
   30 |   }
      |   ^
/__w/stm32-eth/stm32-eth/system/src/newlib/_cxx.cpp: In function 'void __cxa_pure_virtual()':
/__w/stm32-eth/stm32-eth/system/src/newlib/_cxx.cpp:46:3: warning: 'noreturn' function does return
   46 |   }
      |   ^
make[2]: *** [system/src/CMakeFiles/newlib.dir/build.make:93: system/src/CMakeFiles/newlib.dir/newlib/_cxx.cpp.obj] Error 1

[offa]

Despite the newlib issue, <chrono> is no longer available in the freestanding implementation, thus needs a replacement.