http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47739
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |build Target| |*-vxworks --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- /* Both kernels and RTPs have the facilities required by this macro. */ #define TARGET_POSIX_IO That is the comment from vxworks.h. I bet this is due to vxworks support not being maintained at all.