Add an example project that uses ELPA as a library

With this, the pkg-config installation can be verified

ELPA_2014.06/test_project/Makefile.am

+## Process this file with automake to produce Makefile.in
+
+ACLOCAL_AMFLAGS = ${ACLOCAL_FLAGS} -I m4
+
+AM_FCFLAGS = @FC_MODINC@modules @FC_MODOUT@modules $(ELPA_FCFLAGS)
+AM_LDFLAGS = $(ELPA_LIBS)
+
+#bindir = $(abs_top_builddir)
+bin_PROGRAMS = test_real
+test_real_SOURCES = src/test_real.F90

ELPA_2014.06/test_project/autogen.sh

+../autogen.sh
\ No newline at end of file

ELPA_2014.06/test_project/configure.ac

+AC_PREREQ([2.69])
+AC_INIT([elpa_test_project],[2014.06.000], elpa-library@rzg.mpg.de)
+AC_CONFIG_SRCDIR([src/test_real.F90])
+
+AM_INIT_AUTOMAKE([foreign -Wall subdir-objects])
+
+# Without this, automake tries to be smart and rebuilt
+# the autoconf generated files such as configure, aclocal.m4, etc.,
+# in case the timestamps of files such as configure.ac are newer
+#
+# This only makes trouble for end users with out-of-date autoconf versions
+# that cannot produce these files
+AM_MAINTAINER_MODE([disable])
+
+AC_CONFIG_MACRO_DIR([m4])
+AC_CONFIG_HEADERS([config.h])
+AM_SILENT_RULES([yes])
+
+rm -rf config.h config-f90.h
+
+AX_CHECK_GNU_MAKE()
+if test x$_cv_gnu_make_command = x ; then
+        AC_MSG_ERROR([Need GNU Make])
+fi
+
+AC_CHECK_PROG(CPP_FOUND,cpp,yes,no)
+if test x"${CPP_FOUND}" = xno; then
+  AC_MSG_ERROR([no cpp found])
+fi
+
+# gnu-make fortran module dependencies
+m4_include([fdep/fortran_dependencies.m4])
+FDEP_F90_GNU_MAKE_DEPS
+
+AC_PROG_INSTALL
+AM_PROG_CC_C_O
+AM_PROG_AR
+AM_PROG_AS
+
+# Here comes the ELPA specific part
+PKG_PROG_PKG_CONFIG
+PKG_CHECK_MODULES([ELPA],[elpa-2014.06.000],[],[AC_MSG_ERROR(["Need elpa-2014.06.000"])])
+PKG_CHECK_VAR([ELPA_FCFLAGS],[elpa-2014.06.000],[fcflags])
+
+AC_LANG([Fortran])
+m4_include([m4/ax_prog_fc_mpi.m4])
+
+dnl check whether an mpi compiler is available;
+dnl if not abort since it is mandatory
+AX_PROG_FC_MPI([],[have_mpi=yes],[have_mpi=no
+		 if test x"${have_mpi}" = xno; then
+  		  AC_MSG_ERROR([no mpi found])
+		  fi])
+
+AC_FC_FREEFORM
+AC_FC_MODULE_FLAG
+AC_FC_MODULE_OUTPUT_FLAG
+
+AC_MSG_CHECKING(whether OpenMP usage is specified)
+AC_ARG_WITH([openmp],
+		AS_HELP_STRING([--with-openmp],
+			       [use OpenMP threading, default no.]),
+	      [with_openmp=yes],
+	      [with_openmp=no])
+  AC_MSG_RESULT([${with_openmp}])
+  if test x"${enable_openmp}" = x"yes"; then
+     with_openmp=yes
+     AC_MSG_CHECKING(whether --enable-openmp is specified)
+     AC_MSG_RESULT([${enable_openmp}])
+  fi
+  AM_CONDITIONAL([WITH_OPENMP],[test x"$with_openmp" = x"yes"])
+  if test x"${with_openmp}" = x"yes"; then
+	AC_DEFINE([WITH_OPENMP], [1], [use OpenMP threading])
+        AX_ELPA_OPENMP
+  fi
+
+LT_INIT
+
+AC_SUBST([FC_MODINC])
+AC_SUBST([FC_MODOUT])
+
+rm -rf modules/ .fortran_dependencies/
+mkdir modules
+
+AC_CONFIG_FILES([
+  Makefile
+])
+AC_OUTPUT
+
+grep "^#define" config.h > config-f90.h

ELPA_2014.06/test_project/fdep

+../fdep
\ No newline at end of file

ELPA_2014.06/test_project/m4/ax_prog_fc_mpi.m4

+../../m4/ax_prog_fc_mpi.m4
\ No newline at end of file

ELPA_2014.06/test_project/src/test_real.F90

+../../test/test_real.F90
\ No newline at end of file