https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55657
--- Comment #10 from Iain Sandoe <iains at gcc dot gnu.org> --- (In reply to Iain Sandoe from comment #8) > > FAIL: obj-c++.dg/property/at-property-13.mm -fgnu-runtime execution test This is a dyld bug, the objc_setProperty() call should be provided from libobjc-gnu.dylib (that's what the symbol two-level lookup says in the executable). However, dyld is resolving it to objc_setProperty_no_gc from libobjc.A.dylib. So I don't plan to try to address this any further (the test case works for NeXT runtime and for both NeXT and GNU runtimes on other OS versions). The remaining issues are fixed on master e.g. https://gcc.gnu.org/pipermail/gcc-testresults/2021-March/669585.html