Mac OS broken build (std::min unable to implic cast)

[sgatto]

I'm preparing a PR to integrate new developments on the Xpress interface (by RTE).
I am working by using your main branch, the MacOS CI actions are broken.
It looks size_t (returned by size()) is different from uint64_t (returned by model.VehicleVar(node)->Size()) and the std::min function is not found

or-tools/ortools/constraint_solver/routing_search.cc

Line 586 in c00c6a6

std::min(model.VehicleVar(node)->Size(), vehicles.size()));

A explicit cast (redundant for Windows and Linux) seems necessary.

[Mizux]

yup, saw it too yesterday, need to fix it ASAP (and backport it in our internal code base...)
trace: https://github.com/google/or-tools/actions/runs/6505447424/job/17669079004#step:5:46418

I fear it is related to MacOS clang uint64_t definition vs the Linux one....
Linux clang:

or-tools/cmake/docs/swig.md

Lines 66 to 68 in c00c6a6

	clang -dM -E -x c++ /dev/null | grep INT64_TYPE
	#define __INT64_TYPE__ long int
	#define __UINT64_TYPE__ long unsigned int

MacOS clang:

or-tools/cmake/docs/swig.md

Lines 93 to 95 in c00c6a6

	clang -dM -E -x c++ /dev/null | grep INT64_TYPE
	#define __INT64_TYPE__ long long int
	#define __UINT64_TYPE__ long long unsigned int

[sgatto]

Yep, exactly.
I wonder, how do plan to fix it? Simply explicitly casting static_cast<uint64_t>(vehicles.size())?
I don't think you need a PR for this,