https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81393
--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> --- https://kojipkgs.fedoraproject.org//work/tasks/6506/20616506/build.log That fails to build: ../../../../libgo/go/syscall/syscall_linux_s390.go:28:33: error: reference to undefined name 'regs' uint32(uintptr(unsafe.Pointer(regs))), ^ make[8]: Leaving directory '/builddir/build/BUILD/gcc-7.1.1-20170718/obj-s390x-redhat-linux/s390x-redhat-linux/32/libgo' make[8]: *** [Makefile:3331: syscall.lo] Error 1 make[7]: *** [Makefile:2746: all-recursive] Error 1 Guess the each first uint32(uintptr(unsafe.Pointer(regs))) line should be actually uint32(uintptr(unsafe.Pointer(regsout)))