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Force libtool to static link the PIC version of our jemalloc import into
libaml, making libaml standalone. This requires us to test some
additional libraries in our own configure (pthread, and dlopen).

This also solves the long-standing issue of `make check` only working after
`make install`, while removing our custom jemalloc from the installed
libraries.

Fixes #26.

Just to be able to test various matrix placements.

Match intended benchmarking interface, including computing
flops directly.

Brian Suchy authored Jul 25, 2018 and Swann Perarnau committed Jul 25, 2018

Implement 3 dgemm benchmarks versions:
- standard mkl code on total matrix
- prefetch scheme based on UTK/INRIA/ANL on-going collaboration
- same tiling but no prefetch version of the code

This is the version ready for merging, after several weeks of work on
independant branch. Further improvements to API/code will continue after
it reaches master.

Move towards a common list of args and a common log/timing
infrastructure for benchmarks.

We are starting to work on benchmarks to evaluate the usefulness of this
library. Instead of integrating them into the testing infrastructure, it
makes more sense for them to have their own directory and a different
way of handling them.

This patch:
 - creates a benchmark directory for actual codes that we want to use as
   benchmarks of our library.
 - moves functional tests into it.
 - add proper OpenMP detection for these codes