"gcc" -g -fshort-wchar -fno-strict-aliasing -Wall -Werror -Wno-array-bounds -ffunction-sections -fdata-sections -include AutoGen.h -fno-common -DSTRING_ARRAY_NAME=DxeQemuFwCfgS3LibFwCfgStrings -m64 -fno-stack-protector "-DEFIAPI=__attribute__((ms_abi))" -maccumulate-outgoing-args -mno-red-zone -Wno-address -mcmodel=small -fpie -fno-asynchronous-unwind-tables -Wno-address -fno-builtin -flto -DUSING_LTO -Os -mno-mmx -mno-sse -D DISABLE_NEW_DEPRECATED_INTERFACES -c -o /home/SOURCES/xen/xen.git/tools/firmware/ovmf-dir-remote/Build/OvmfX64/DEBUG_GCC5/X64/OvmfPkg/Library/QemuFwCfgS3Lib/DxeQemuFwCfgS3LibFwCfg/OUTPUT/./QemuFwCfgS3Dxe.obj -I/home/SOURCES/xen/xen.git/tools/firmware/ovmf-dir-remote/OvmfPkg/Library/QemuFwCfgS3Lib -I/home/SOURCES/xen/xen.git/tools/firmware/ovmf-dir-remote/Build/OvmfX64/DEBUG_GCC5/X64/OvmfPkg/Library/QemuFwCfgS3Lib/DxeQemuFwCfgS3LibFwCfg/DEBUG -I/home/SOURCES/xen/xen.git/tools/firmware/ovmf-dir-remote/MdePkg -I/home/SOURCES/xen/xen.git/tools/firmware/ovmf-dir-remote/MdePkg/Include -I/home/SOURCES/xen/xen.git/tools/firmware/ovmf-dir-remote/MdePkg/Include/X64 -I/home/SOURCES/xen/xen.git/tools/firmware/ovmf-dir-remote/OvmfPkg -I/home/SOURCES/xen/xen.git/tools/firmware/ovmf-dir-remote/OvmfPkg/Include /home/SOURCES/xen/xen.git/tools/firmware/ovmf-dir-remote/OvmfPkg/Library/QemuFwCfgS3Lib/QemuFwCfgS3Dxe.c
/home/SOURCES/xen/xen.git/tools/firmware/ovmf-dir-remote/MdeModulePkg/Library/UefiHiiLib/HiiLib.c: In function ‘InternalHiiIfrValueAction’:
/home/SOURCES/xen/xen.git/tools/firmware/ovmf-dir-remote/MdeModulePkg/Library/UefiHiiLib/HiiLib.c:2205:20: error: comparison between pointer and zero character constant [-Werror=pointer-compare]
   while (StringPtr != L'\0') {
                    ^~
/home/SOURCES/xen/xen.git/tools/firmware/ovmf-dir-remote/MdeModulePkg/Library/UefiHiiLib/HiiLib.c:2205:10: note: did you mean to dereference the pointer?
   while (StringPtr != L'\0') {
          ^
cc1: all warnings being treated as errors