This commit is not ABI compatible, since it changes the interfaces
of some routines

Also, introduce type checking for transpose and reduce_add routines

These files are always automatically generated by autooconf and should
not be in version control.

Andreas Gloess informed us about a memory leak in ELPA, which was
introduced in version 2013.11.008.

This memory leak is removed now again.

Note, that older versions of ELPA will not be fixed right now.

An "dangling" fi has been removed

Remove variables which are not needed (anymore)

The macros which define the functionality to test
for
 - a specific real/complex kernel (not all available kernels)

are now defined in files in the m4 directory

Just polishing of text

Signed-off-by: Andreas Marek <amarek@rzg.mpg.de>

There was an inconsistency when the OpenMP flag was different for the
Fortran and C compiler (e.g. -openmp for ifort and -fopenmp for gcc).

This led to strange errors when linking the example program with the C
main() routine when using Intel Fortran, Intel MPI, and GCC together, a
typical error message was

  /usr/bin/ld: MPIR_Thread: TLS definition in [...]/intel64/lib/libmpi_dbg_mt.so section .tbss mismatches non-TLS definition in [...]/intel64/lib/libmpi_dbg.so section .bss
  [...]/intel64/lib/libmpi_dbg_mt.so: could not read symbols: Bad value

The reason seems to be that the various MPI wrapper shell scripts
(mpicc, mpiifort) need the correct OpenMP option to select the
thread-safe Intel MPI debug library. Previously, always OPENMP_FCFLAGS
was appended to LDFLAGS, which did not trigger this when linking a C
main program with mpicc.

Sourcecode in AC_LINK_IFELSE must now be guarded by AC_LANG_SOURCE
statements.

Just adding -maxv works on many systems which have compiler that can
produce AVX code but do not necessarily have processors with AVX
support.

If not, abort with an #error (this means that configure failed to detect
the lack of AVX support for C++)

The flag -mavx was not removed from C/CXXFLAGS again if AVX is unusable

Andreas Marek authored Mar 18, 2015 and Lorenz Huedepohl committed Mar 18, 2015

- provide C interface for ELPA Library

- correct an error in the test case for QR-decomposition

Some compilers detected the static out-of-bounds condition present in
the test code and refused to compile it.

C interfaces are now available and definied in the header
elpa.h

In the test programms "MPI_ABORT" has been used incorrectly.

The blocksize should be intent(in) and not intent(inout), since
it should not be changed by solve_evlp_real_2stage

The procedure "get_elpa_row_col_comms" is now a function instead
a subroutine and returns an error code.

This should have been done previously when all the other ELPA
function have been updated to return an error code.

This requires an ABI change in the next ELPA release !

These files can be regenerated with autogen.sh and should not be under
version control.

People having trouble generating them should pick a released tar-ball
which includes them. With sufficiently recent autoconf/automake/libtool,
it should however be easy to successfully run autogen.sh.

If the user chooeses parameters for the QR-decomposition which are
not allowed an error has been produced. This error is caught now,
and the library aborts with a message

It is now possible to switch on more debug messages via
the environment variable "ELPA_DEBUG_MESSAGES=yes"

Error in configure test program fixed