Compiling test failed with `error: size of array ‘altStackMem’ is not an integral constant-expression`

[AmirInt]

GCC version:
gcc (Ubuntu 11.3.0-1ubuntu1~22.04) 11.3.0

CMake version:
cmake version 3.26.0

OS:
Ubuntu 22.04 on WSL2 (Windows 11)

Steps to reproduce:
Attempt the "Compile Tests" section in the README file.
The make command errors out with:

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

I simply replaced the macro SIGSTKSZ with its value 8192 in doctest.hpp, and I could successfully generate and run the tests, but that's not the solution. There are related issues like this, but at least I couldn't find anyone directly addressing and fixing it.

[Haibarapink]

The macro SIGSTKSZ is defined as sysconf (_SC_SIGSTKSZ), and the function 'sysconf(...) ' isn't an integral constant-expression.