Make vboot_version extern in header
When enabling `-fno-common` in Fuchsia, we get a bunch of linker errors
when linking futility:
```
ld.lld: error: duplicate symbol: vboot_version
>>> defined at futility.h:43 (../../third_party/vboot_reference/futility/futility.h:43)
>>> host_x63-asan_no_detect_leaks/obj/third_party/vboot_reference/futility/futility.cmd_bdb.c.o:(vboot_version)
>>> defined at futility.h:43 (../../third_party/vboot_reference/futility/futility.h:43)
>>> host_x64-asan_no_detect_leaks/obj/third_party/vboot_reference/futility/futility.cmd_create.c.o:(.bss.vboot_version+0x0)
```
and think this is because -fno-common places vboot_version for
unitialized global variables in the BSS section of each object file.
Making it extern instead resolves each reference to its definition in
futility/misc.c.
Change-Id: I591f07abd1f975a8a9d078bb4366e2e0861390b4
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/1839207
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Joel Kitching <kitching@chromium.org>
Commit-Queue: Julius Werner <jwerner@chromium.org>
Tested-by: Julius Werner <jwerner@chromium.org>
1 file changed
