Many packages build with -ffp-contract=off on the non-x86 architectures because -ffp-contract=fast (the GCC default) uses FMA instructions on those architectures. With the x86-64-v3 default for RHEL 10 (RHELBU-1822), FMA comes to x86-64 as well, introducing the test suite failures on this architecture as well.

This raises the question whether -ffp-contract=fast is the appropriate default, and if we are missing more issues due to lack of test suite coverage.

GCC 14 implements --fp-contract=on:

• c-family: implement -ffp-contract=on

But it does not change the default in a way that impacts most of our builds.