From arm.c: error ("%s incompatible with %<-mword-relocations%>", flag); The first %s is also a command line option and thus should be %qs.
From csky.c: warning (0, "cpu %s is not based on arch %s, ignoring the arch", csky_selected_cpu->name, csky_selected_arch->name);
From gcn.c: error ("unknown specifier %s in amdgpu_hsa_kernel attribute", str);
From gcn.c, one more: error ("duplicated parameter specifier %s in amdgpu_hsa_kernel " "attribute", str);
Confirmed. See also pr90158 for similar issues.