[GRASS-dev] [GRASS-SVN] r66413 - grass-addons/grass7/vector/v.kriging

[Glynn Clements]

Vaclav Petras wrote:

> I was not able to determine from svn why gmath.h contains la.h.

AFAICT, it's because the functions are in lib/gmath. Of course, that
then brings up the question why they're there, rather than in a
separate library ...

Incidentally, the whole of lib/gmath/la.c is conditionalised upon

	#if defined(HAVE_LIBLAPACK) && defined(HAVE_LIBBLAS)

but individual functions (and even sections of functions) are
conditionalised as necessary.

And there are a few functions for which we could reasonably supply our
own implementation if BLAS/LAPACK aren't available. E.g. 
G_matrix_product() and G_vector_norm_euclid() should be
straightforward.

AFAICT, G_matrix_LU_solve() is the only function that's moderately
complex.

-- 
Glynn Clements <glynn at gclements.plus.com>