Relocation overflow when `struct` is large

Appeared in the recent OpenBLAS build. The mininum repro case is:

struct DATA_ZTRMV {
  double a_verify[131072];
  double x_test;
} data_ztrmv;

int ztrmv_(double *) { }

void check_ztrmv()
{
  ztrmv_(&data_ztrmv.x_test);
}

when built with:

aarch64-w64-mingw32-gcc -o bug.o -c bug.c

the output is:

/tmp/cc8WGCum.s: Assembler messages:
/tmp/cc8WGCum.s:38: Error: relocation overflow

Changing the size of a_verify to anything lower than 131072 fixes the issue.

The produced assembly is:

    .arch armv8-a
    .text
    .global    data_ztrmv
    .data
    .align    3
data_ztrmv:
    .space    1048584  // skip
    .text
    .align    2
    .global    ztrmv_
    .seh_proc    ztrmv_ 
ztrmv_:
    sub    sp, sp, #16
    .seh_stackalloc    16
    .seh_endprologue
    str    x0, [sp, 8]
    nop
    .seh_startepilogue
    add    sp, sp, 16
    .seh_stackalloc    16
    ret
    .seh_endepilogue
    .seh_endproc
    .align    2
    .global    check_ztrmv
    .seh_proc    check_ztrmv 
check_ztrmv:
    sub    x10, sp, #8192
    .seh_nop
    str    xzr, [x10, 4080]
    .seh_nop
    .seh_nop
    stp    x29, x30, [sp, -16]!
    .seh_save_regp_x    x29, 16
    mov    x29, sp
    .seh_set_fp
    .seh_endprologue
    adrp    x0, data_ztrmv+1048576
    add    x0, x0, :lo12:data_ztrmv+1048576
    bl    ztrmv_
    nop
    .seh_startepilogue
    ldp    x29, x30, [sp], 16
    .seh_save_regp_x    x29, 16
    ret
    .seh_endepilogue
    .seh_endproc

Windows-on-ARM-Experiments / mingw-woarm64-build

Relocation overflow when `struct` is large #130