GitLab

Removed a forgotten C-preprocessor error flag.
Futhermore, describe in the documentation why at the moment a
build of Bluegene P/Q kernels and OpenMP is not allowed.

Automake does normally not understand the dependencies of Fortran 90
modules, thus a parallel build will almost certainly fail.

As in ELPA 2011.12.002, the ELPA_development_version_qr  now
includes scripts from the fdep project (see git.schokokeks.org/fdep)
which cirumvents this problem.

Thanks to Lorenz Huedepohl, now a parallel build works.

- updated INSTALL documentation
- improved description of kernels src/elpa2_kernels/README_elpa2_kernels.txt
- improved OpenMP builds:
   * usage of OpenMP can now be specified with
     "--enable-openmp" or "--with-openmp"
- improved checks for AVX build (identical to ELPA 2013.08.003):
   * if AVX kernels are specified AVX compilation is tested
   * the option "--with-avx-optimization" automatically updates
     CFLAGS and CXXFLAGS with optimization flags

This is the release of the ELPA_development_version_OpenMP
If OpenMP support is not used, this version has the same
functionality as ELPA_2013.08.

If OpenMP support is used, obviously, a hybrid version of ELPA will be
build.

Allthough this is a release, version ELPA_2013.11 is far from complete!
During the next week optimizations of the OpenMP part will be published,
however, the basic functionality is set by this commit

This commit introduces OpenMP functionality in the
ELPA_development_version_OpenMP branch.

It contains several bugfixes to the OpenMP functionality in the
branch "ELPA_development_version", the later will soon be deleted
since the new branch is the new reference implementation.

The current branch contains the following features/bugfixes:
- building of the OpenMP version of ELPA via configure and the
  "--with-openmp" flag. The build library contains a "_mt"
  (multi-threaded) in its name.
  The configure procedure should (hopefully) determine for each
  compiler the neccessary OpenMP flags.
  If the "--with-openmp" flag is ommitted exactly the same code
  as in the ELPA 2013.08.001 release is used and build in the
  same way
- The example test cases print which kernels have been used and
  how many OpenMP threads are used at runtime
- correct handling of OpenMP stack arrays: the previous implementation
  caused compiler dependent segmentation faults
- OpenMP capability with all available kernels: the correctness of
  the computations have been checked for all kernels except the
  Bluegene (P/Q) versions

Based on the ELPA 2013.08.001 a development version for ELPA OpenMP
has been created

A bug in ELPA_2013.08 was fixed: due to typo in a preprocessor statement
the kernels optimized for BLUGENE/P could not be used correctly.

In course of this action, also a bugfix versioning scheme was
introduced: in case of bugfixes they are versioned with an extra 3 digit
number in the ELPA release name, i.e ELPA 2013.08 -> 2013.08.001

Consistently any new release of ELPA will from now on start on the minor
level "000".

It is pointed out that it is mandatory to set the variables
"BLACS_LDFLAGS" and "BLACS_FCFLAGS" at build time.

Furthermore, it is clarified how to set individual optimization
flags at build time

Thanks to a comment to the Debian community, the versioning
of the ELPA library and its API are changed:

- the API version nummer starts now with 0.0.0 and not
  anymore with the version number of the first ELPA release,
  i.e. 2011.12

- if ELPA is installed as library, the files are now named
  elpa.so.API_VERSION. All references to the ELPA version
  and the used compiler vanished, since these are considered
  harmeful.

Note, that at a later stage, if neccessary, the library name might
also contain the uses MPI version.

This commit releases ELPA version 2013.08

It is identical with the latest commit version 2013.02_BETA, except:

- rename ELPA_2013.02.BETA -> ELPA_2013.08
- update of configure.ac
- remove of src/elpa2.f90_save
- remove of test/Makefile

This version has been tested extensivly, however, there might always
be some bugs.
In case of questions please contact elpa-library@rzg.mpg.de or via
the ELPA forum on http://elpa-lib.fhi-berlin.mpg.de/forum/index.php

Similiar to ELPA_2011.12 this version of ELPA now supports automake.

To the _source_ code of ELPA the following changes had to be made:

-elpa2.F90 now use the create "config-f90.h" file to choose via
 preprocessor switches which kernel was defined by the user

- the SSE-AVX intrinsic kernels of A. Heinecke had to be changed such
  that they support "internal linkage" for the building of a shared
  library.

The following other changes were made to the documentation

- elpa2_kernels/README_elpa2_kernels.txt was updated; the new configure
  targets are explained

- README, INSTALL were updated

To high propability this commit is the last one, before this beta
version	will become an official release

ELPA version 2011.12 can now be build with automake into
a shared/static library. This should help the bundling in
linux distributions

The other versions of ELPA will be updated soon