GCC 13.2.0 build devel error about arangodb HOT 2 OPEN

Regarding the missing v8 module:
Initially all git submodules may be missing after a fresh git checkout. Or some newly added git submodules may be adding after a git pull.
In this case it is best to just to git submodule update --init to fetch/update the missing submodules.

Regarding compilation with gcc:
we made the experience that compilation with g++ got increasingly more difficult with more recent versions of g++.
Starting with g++11.3 there were problems with compiling some legitimate code from some third party library we were using. These issues weren't resolved in g++12, but only in g++13.
However, g++12 and also g++13 introduced tons of false positives about uninitialized variables and out-of-bounds accesses, not just in our own code but also in many of the third party libraries (where they have been reported as well and have been identified as false posivies). That was really daunting and forced us to turn these checks off when compiling with g++ >= 13. To the best of my knowledge these issues still haven't been resolved in g++.
We recently also upgraded the bundled version of the V8 third party library, which also isn't able to compile with g++ anymore.

For all these reasons we moved the compilation to clang a while ago. clang-16 is known to compile devel fine. We are also using it in our CI and to reproduce build images.
So switching the tool chain (compiler & linker) to clang & lld would resolve the issue.

from arangodb.

Specifically, I am using all these cmake options to ensure that the entire toolchain uses clang tools and not the gcc ones:

-DCMAKE_C_COMPILER=clang-16 
-DCMAKE_CXX_COMPILER=clang++-16 
-DCMAKE_C_COMPILER_AR="/usr/bin/llvm-ar-16" 
-DCMAKE_CXX_COMPILER_AR="/usr/bin/llvm-ar-16" 
-DCMAKE_C_COMPILER_RANLIB="/usr/bin/llvm-ranlib-16" 
-DCMAKE_CXX_COMPILER_RANLIB="/usr/bin/llvm-ranlib-16" 
-DCMAKE_EXE_LINKER_FLAGS="-fuse-ld=lld-16"

from arangodb.