[Build fail on Ubuntu 20.04.2][OvmfPkg] SecTdxHelper.c:751:26: error: ‘PhysicalEnd’ may be used uninitialized in this function [-Werror=maybe-uninitialized]

[tenpoku1000]

~/edk2$ build -a X64 -t GCC49 -p OvmfPkg/OvmfPkgX64.dsc

/home/tenpoku/edk2/OvmfPkg/IntelTdx/TdxHelperLib/SecTdxHelper.c: In function ‘TdxHelperProcessTdHob’:
/home/tenpoku/edk2/OvmfPkg/IntelTdx/TdxHelperLib/SecTdxHelper.c:751:26: error: ‘PhysicalEnd’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
751 | APsStackStartAddress = PhysicalEnd - APS_STACK_SIZE (CpusNum);
| ^
/home/tenpoku/edk2/OvmfPkg/IntelTdx/TdxHelperLib/SecTdxHelper.c:335:25: note: ‘PhysicalEnd’ was declared here
335 | EFI_PHYSICAL_ADDRESS PhysicalEnd;
| ^~~~~~~~~~~
cc1: all warnings being treated as errors
make: *** [GNUmakefile:305: /home/tenpoku/edk2/Build/OvmfX64/DEBUG_GCC49/X64/OvmfPkg/IntelTdx/TdxHelperLib/SecTdxHelperLib/OUTPUT/SecTdxHelper.obj] error 1

build.py...
: error 7000: Failed to execute command
make tbuild [/home/tenpoku/edk2/Build/OvmfX64/DEBUG_GCC49/X64/OvmfPkg/IntelTdx/TdxHelperLib/SecTdxHelperLib]

build.py...
: error F002: Failed to build module
/home/tenpoku/edk2/OvmfPkg/IntelTdx/TdxHelperLib/SecTdxHelperLib.inf [X64, GCC49, DEBUG]

• Failed -
  Build end time: 15:59:29, Mar.11 2025
  Build total time: 00:00:17

/edk2$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/9/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none:hsa
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 9.4.0-1ubuntu120.04.2' --with-bugurl=file:///usr/share/doc/gcc-9/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++,gm2 --prefix=/usr --with-gcc-major-version-only --program-suffix=-9 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none=/build/gcc-9-9QDOt0/gcc-9-9.4.0/debian/tmp-nvptx/usr,hsa --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 9.4.0 (Ubuntu 9.4.0-1ubuntu1~20.04.2)

[tenpoku1000]

$ git show -s --format=%H
de13423