Cannot build 2.9.3, get "different exception specifier"

user1@debian2:~/linuxcnc-dev/src$ make
Reading 54/210 dependency files
Done reading dependencies
Reading 0/238 realtime dependency files
Done reading realtime dependencies
cp ../scripts/rtapi.conf ../tests/uspace/spawnv-root/rtapi.conf
Compiling rtapi/uspace_rtai.cc
In file included from rtapi/uspace_rtai.cc:10:
/usr/include/x86_64-linux-gnu/sys/io.h:38:12: error: declaration of ‘int iopl(int) noexcept’ has a different exception specifier
   38 | extern int iopl (int __level) __THROW;
      |            ^~~~
In file included from /usr/include/rtai/rtai_lxrt.h:522,
                 from rtapi/uspace_rtai.cc:6:
/usr/include/rtai/asm/rtai_lxrt.h:170:38: note: from previous declaration ‘int iopl(int)’
  170 | #define rtai_iopl()  do { extern int iopl(int); iopl(3); } while (0)
      |                                      ^~~~
/usr/include/rtai/rtai_lxrt.h:605:9: note: in expansion of macro ‘rtai_iopl’
  605 |         rtai_iopl();
      |         ^~~~~~~~~
make: *** [Makefile:288: objects/rtapi/uspace_rtai.o] Error 1