Build fails with error: size of array ‘altStackMem’ is not an integral constant-expression

[partofthething]

In building on Ubuntu 22.04, we get an error from the catch-adapter-src dependency saying:

[ 88%] Built target njoy21
[ 89%] Building CXX object src/njoy21/CommandLine/test/CMakeFiles/njoy21.CommandLine.test.dir/CommandLine.test.cpp.o
In file included from /usr/include/signal.h:328,
                 from /home/nick/code/NJOY21/bin/_deps/catch-adapter-src/src/single_include/catch.hpp:6520,
                 from /home/nick/code/NJOY21/src/njoy21/CommandLine/test/CommandLine.test.cpp:2:
/home/nick/code/NJOY21/bin/_deps/catch-adapter-src/src/single_include/catch.hpp:6543:33: error: size of array ‘altStackMem’ is not an integral constant-expression
 6543 |         static char altStackMem[SIGSTKSZ];
      |                                 ^~~~~~~~
/home/nick/code/NJOY21/bin/_deps/catch-adapter-src/src/single_include/catch.hpp:6594:45: error: size of array ‘altStackMem’ is not an integral constant-expression
 6594 |     char FatalConditionHandler::altStackMem[SIGSTKSZ] = {};
      |                                             ^~~~~~~~
make[2]: *** [src/njoy21/CommandLine/test/CMakeFiles/njoy21.CommandLine.test.dir/build.make:76: src/njoy21/CommandLine/test/CMakeFiles/njoy21.CommandLine.test.dir/CommandLine.test.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:2142: src/njoy21/CommandLine/test/CMakeFiles/njoy21.CommandLine.test.dir/all] Error 2
make: *** [Makefile:146: all] Error 2

[partofthething]

Looks like this is related mostly to this in upstream: catchorg/Catch2#2178