Unable to locate C++ libraries with clang during qutip sesolve coefficients

[benjimaclellan]

Ran into issues with Qutip sesolve after compiling to QutipExperiment. An error that the complex library could not be located with the clang compiler. This seems to be an issue with the local development machine, as all github tests pass using the same dependency versions.

A solution was to change the local C compiler to gcc via

export CXX=g++

Ran into similar issues on both MacOS and Ubuntu 22