Sergey Kosukhin authored 5 years ago and Moritz Hanke committed 5 years ago

* Custom M4 macro are replaced with those to be used in the new ICON building
  system.
* Removed cfortran.h: the mangling scheme for Fortran symbols is detected at
  the configure-time.
* The precious variables for setting flags resuired to enable external
  packages (e.g. MTIME_C_INCLUDE, MTIME_C_LIB, etc.) are renamed to *_CFLAGS
  and *_CLIBS to better reflect their purpose. If those variables are set as
  command-line arguments of the configure script, the script checks only the
  given values literally, i.e. the script does not try to append and check any
  additional linking or compilation flags.
* The definition of functions declared in yac_lapack_interface.h is moved
  to a separate file yac_lapack_interface.c. And the choice of the interface
  is made with a single preprocessor macro YAC_LAPACK_INTERFACE_ID.
* The default suffix for include files for libxml2 is
  <XML2_ROOT>/include/libxml2 instead of <XML2_ROOT>/include.
* The configure script argument '--without-mpi-pack-external' is renamed to
  '--disable-mpi-pack-external' to reflect that it belongs to the section
  'Optional Features' and not to 'Optional Packages'. If the usage of
  MPI_Pack_external is disabled, the corresponding configure-time tests are
  skipped.
* The configure script argument '--without-regard-for-quality' is renamed to
  '--enable-mpi-checks' (defaults to 'yes'). Previously, the argument allowed
  for ignoring the failures of the configure-time tests of MPI_Pack_external.
  Now the argument allows for skipping the tests at all when specifying a
  valid interactive MPI_LAUNCH command is not possible.
* MPI_LAUNCH does not have to be a full path to an MPI launcher executable
  anymore: the value of the variable is interpreted as a command.
* AR, ARFLAGS, and RANLIB are precious variable now and appear in the help
  message of the configure script.
* The configure script does not try to detect MPI libraries, it only checks
  whether they are available (see comments in configure.ac).

Refactoring for lapack interface detection, added a bundled version of LAPACK (based on Netlib clapack).