SIGSTKSZ changed to be a syscall

[ilyas675]

In file included from /usr/include/signal.h:328,
                 from /home/ilyas/projects/ctbignum/test/thirdparty/catch/catch.hpp:6456,
                 from /home/ilyas/projects/ctbignum/test/src/tests_main.cpp:13:
/home/ilyas/projects/ctbignum/test/thirdparty/catch/catch.hpp:6631:45: error: size of array ‘altStackMem’ is not an integral constant-expression
 6631 |     char FatalConditionHandler::altStackMem[SIGSTKSZ] = {};

Problem is similar to r-lib/testthat#1373.

gcc version 12.2.1

$ uname -a
Linux fedora 6.0.9-300.fc37.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Nov 16 17:36:22 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux

$ ldd --version
ldd (GNU libc) 2.36

[niekbouman]

Apologies for the late response, only noted your issue recently.

fixed in v0.7 by updating Catch2