The CUDA datetime tests (numba.cuda.tests.cudapy.test_datetime) only test with datetime[D] - testing with other units would be a good idea.

I also can't find any reference to datetimes being supported on CUDA in the documentation - some explicit mention that they are supported would be helpful.

While the test_suite presented in #589 does work, it is still pretty simple and can be improved and enhanced.

• Add tests for gnutils and coreutils.
• Add necessary utilities so more complex programs can be compiled from sources.
• Integrate CMake, so one could write something like make validate and the subset of test that is deemed necessary (for example everything with min t

• incremental CTU (on the fly CTU with skip files) feature usage configuration, limitations when ready
• web UI usage
  • how to compare the previous (marked by tag, use the date filter) results of two runs (same run?)
• more simple and advanced use case examples
  • CI job for a quality review (check for high severity results and fail the job if any)
  • usage of the upcoming f

Add these functions:

• sscanf, scanf, etc.
• strtoll, strtod, strspn (some of them maybe are already there)
• __ctype_b_loc behaves wrong (it does not link always and is made symbolic)
• memchr