[Bug objc/126839] [17 Regression] Many objc failures since r17-2156-g6317befec9

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126839

--- Comment #2 from Iain Sandoe <iains at gcc dot gnu.org> ---
I do both 32b hosted and cross builds - so I think those are less likely to be
the cause - bare-metal/static linking seems more likely (perhaps there is some
entity that lost its "preserve" and thus became eliminated in a static link -
but remains in a dynamic one) [speculation].