[Octave-bug-tracker] [bug #55937] building default with sundials 2.x fails in make, configure should disable sundials

[Mike Miller]

Follow-up Comment #18, bug #55937 (project octave):

Ok, I see the difference, on Debian with SUNDIALS 3.1.2 and using
-I/usr/include/suitesparse, with my original ordering it does not detect the
'SUNKLU' function specifically, no error or warning is printed, it would just
silently disable that feature at build time.

Somehow we need to do the optional tests for KLU features after testing
whether SUNDIALS will work at all, but unfortunately the same macro that tests
for version 3 vs version 4 API functions also tests for KLU functions. Maybe
we can move just the tests for the 'SUNLinSol_KLU' and 'SUNKLU' functions into
the 'OCTAVE_CHECK_SUNDIALS_SUNLINSOL_KLU' macro?

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