[Bug target/63773] [meta-bug] Restoring darwin bootstrap for gcc 5.0

[iains at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63773

--- Comment #32 from Iain Sandoe <iains at gcc dot gnu.org> ---
reduced testcase:

        .text
        .align 4,0x90
        .globl _choose_tmpdir
_choose_tmpdir:
        sbbl    $3+_vartmp, %esi
        ret
        .space 254

        .const
        .align 2
_vartmp:
        .byte   47

===

It seems that the reloc length is expected to be 1 (which will not, indeed,
accommodate the offset).

cctools (877.5) using -Q and my local port of GAS both produce;

address  pcrel length extern type    scattered symbolnum/value
00000002 False long   n/a    VANILLA True      0x00000108