Fix MATLAB 2024a MEX build: resolve size_t and uint64_t template collision

[svenangerer]

Description:
I was attempting to build GTSAM with MATLAB 2024a support on Ubuntu using GCC 11.4. The build failed due to a redefinition of template specializations in matlab.h because size_t and uint64_t resolve to the same underlying type on 64-bit Linux.

Changes:

Added <type_traits>

Commented out wrap<uint64_t> and unwrap<size_t> to prevent the compiler error.

Note: I am aware that hard-commenting these out might affect Windows builds where the types differ. I am open to suggestions on how to conditionally compile these using #if macros or <type_traits> to ensure cross-platform compatibility.

My Configuration:

OS: Ubuntu 22.04 (64-bit)

Compiler: GNU 11.4.0

MATLAB: R2024a

[dellaert]

Thanks. Two issues:

• wrap is a subtree so it would be a PR on the borglab/wrap repo.
• How does it relate to the recent PR on that repo? One of them I think specifically touched on issues like this and also did the appropriate guarding.

[svenangerer]

Thanks! I took a look at the borglab/wrap repo and saw that PR #183 recently addressed this for Windows (_WIN64).

However, because I am building on 64-bit Ubuntu, _WIN64 isn't defined, so the size_t / uint64_t template collision was still causing the MATLAB build to fail on my machine.

I have closed this PR and opened a new one on the wrap repository to extend those guards to cover 64-bit Unix (LP64) as well.

You can find the new pull request here: borglab/wrap#186