https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90835
Jack Howarth <howarth.at.gcc at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |howarth.at.gcc at gmail dot com --- Comment #8 from Jack Howarth <howarth.at.gcc at gmail dot com> --- Jeremy's comment on this issue was... "Although frankly, it is well past time that GCC add support for these macros and attributes if they want to actually consider darwin a supported platform." so I suspect upstream may expect FSF gcc to finally support these macros at this late date.