Fail to build for powerpc about vvdec HOT 2 CLOSED

That looks like a bug in the static analyzer of the specific GCC version you are using. If you look at the code two lines above the first error, there is a loop condition to check that uiArrayAddr doesn't exceed the MRG_MAX_NUM_CANDS range:

  while (uiArrayAddr < maxNumMergeCand && uiArrayAddr < MRG_MAX_NUM_CANDS)
  {
    mrgCtx.interDirNeighbours [uiArrayAddr     ] = 1;
    mrgCtx.BcwIdx             [uiArrayAddr     ] = BCW_DEFAULT;
    mrgCtx.mvFieldNeighbours  [uiArrayAddr << 1] . setMvField(Mv(0, 0), r);
    mrgCtx.useAltHpelIf       [uiArrayAddr     ] = false;

You can work around the issue by adding -Wno-error=stringop-overflow to the compiler-flags in source/Lib/vvdec/CMakeLists.txt line 100.

from vvdec.

I agree the gcc version is old. I already did a build by removing -Werror from compiler flags
You can close this bug. I'll report this bug to GCC if I see again this problem with never GCC.

from vvdec.