On Wed, May 25, 2022 at 4:50 PM Ard Biesheuvel <ardb@...> wrote:

On Wed, 25 May 2022 at 17:08, Rebecca Cran <quic_rcran@...> wrote:

I noticed OvmfPkg/OvmfPkgX64.dsc doesn't build with `-t CLANG38 -b
NOOPT` (with clang version 14.0.2) with the latest edk2 master
(07c0c2eb0a5970db614ebce1060fc79d6904bdfd):

make: Nothing to be done for 'tbuild'.
/usr/bin/ld: /usr/bin/ld: DWARF error: invalid or unhandled FORM value:
0x23
/home/bcran/src/upstream/uefi/edk2/Build/OvmfX64/NOOPT_CLANG38/X64/OvmfPkg/VirtioGpuDxe/VirtioGpu/OUTPUT/VirtioGpuDxe.lib(Gop.obj):
in function `GopSetMode':
Gop.c:(.text.GopSetMode+0x418): undefined reference to `memcpy'

Can you dump the object file to see where the memcpy() call is emitted?

I think I found the smoking gun: https://github.com/tianocore/edk2/blob/916f90baa547b3ebef8fa87c530e2f0c8e35e1e3/OvmfPkg/VirtioGpuDxe/Gop.c#L512