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Where is the documentation of the new options and this new feature?
I'm currently writing it, and will post it ASAP. I should have stated that in my patch submission.
Here is the doc patch. Tested with "make info". As I'm not a very good writer (even in french, let alone english), alternate wordings are welcome!
+@cindex -fblas-matmul-limit +@item -fblas-matmul-limit=@var{n} +Only significant when @command{-fexternal-blas} is in effect. +Matrix multiplication of matrices with size larger than (or equal to) @var{n} +will be performed by calls to BLAS functions, while others will be +handled by @command{gfortran} internal algorithms. If the matrices +involved are not square, the size comparison is performed using the +geometric mean of the three matrices dimensions.
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