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`TensorRandom` currently relies on BSD `random()`, which is not always available. The [linux manpage](https://man7.org/linux/man-pages/man3/srandom.3.html) gives the glibc condition: ``` _XOPEN_SOURCE >= 500 || /* Glibc since 2.19: */ _DEFAULT_SOURCE || /* Glibc <= 2.19: */ _SVID_SOURCE || _BSD_SOURCE ``` In particular, this was failing to compile for MinGW via msys2. If not available, we fall back to using `rand()`.
Eigen is a C++ template library for linear algebra: matrices, vectors, numerical solvers, and related algorithms.
For more information go to http://eigen.tuxfamily.org/.
For pull request, bug reports, and feature requests, go to https://gitlab.com/libeigen/eigen.
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