On Fri, Mar 21, 2025, at 18:05, Guenter Roeck wrote:

On 3/13/25 04:43, Alessandro Carminati wrote:

gcc 10.3.0 and later do not have this problem. I also tried s390 builds 
with gcc 9.4
and 9.5 but they both crash for unrelated reasons.

If this is a concern, the best idea I have is to make KUNIT_SUPPRESS_BACKTRACE
depend on, say,
	depends on CC_IS_CLANG || (CC_IS_GCC && GCC_VERSION >= 100300)

A more complex solution might be to define an architecture flag such
as HAVE_SUPPRESS_BACKTRACE, make that conditional on the gcc version
for s390 only, and make KUNIT_SUPPRESS_BACKTRACE depend on it.

That is probably fine, there are very few users on s390 that build
their own kernels, and they likely all have modern compilers anyway.

I should still send a patch to raise the minimum compiler version to
gcc-8.1, but unfortunately that is not enough here.

     Arnd