Add an exhaust test for all 56 MPI file write and read APIs

* when large-count feature is not available, test only the 28
  non-large-count MPI-IO APIs

Author: wkliao

darshan-runtime/Makefile.am

@@ -5,7 +5,7 @@
 
 ACLOCAL_AMFLAGS = -I ../maint/config
 
-SUBDIRS = lib pkgconfig share
+SUBDIRS = lib pkgconfig share test
 
 bin_SCRIPTS = darshan-config \
               darshan-gen-cc.pl \

darshan-runtime/configure.ac

@@ -807,7 +807,16 @@ if test "x$enable_darshan_runtime" = xyes ; then
       if test "x$have_mpi_io_large_count_apis" = "xyes" ; then
          AC_DEFINE(HAVE_MPI_LARGE_COUNT, 1,
                    [Define if MPI-IO support large count feature])
+         AC_SUBST(HAVE_MPI_LARGE_COUNT, [1])
       fi
+
+      ac_mpi_path=`AS_DIRNAME(["$CC"])`
+      if test "x$ac_mpi_path" = "x." ; then
+         AC_PATH_PROGS(mpicc_path, ${CC})
+         ac_mpi_path=`AS_DIRNAME(["$mpicc_path"])`
+      fi
+      AC_PATH_PROGS(TESTMPIRUN, mpiexec mpirun, [], [$ac_mpi_path])
+      AC_SUBST(TESTMPIRUN)
    else
       have_mpi_io_large_count_apis=no
    fi
@@ -936,6 +945,7 @@ AC_CONFIG_FILES(Makefile \
                 darshan-gen-cxx.pl \
                 darshan-gen-fortran.pl \
                 lib/Makefile \
+                test/Makefile \
                 pkgconfig/Makefile \
                 pkgconfig/darshan-runtime.pc \
                 share/Makefile \

darshan-runtime/test/Makefile.am

@@ -0,0 +1,25 @@
+#
+# See COPYRIGHT notice in top-level directory.
+#
+# @configure_input@
+
+AM_CPPFLAGS  = -I$(top_builddir)
+
+check_PROGRAMS =
+
+#if BUILD_MPIIO_MODULE
+check_PROGRAMS += tst_mpi_io
+tst_mpi_io_SOURCES = tst_mpi_io.c
+#endif
+
+AM_TESTS_ENVIRONMENT  = export TESTMPIRUN="$(TESTMPIRUN)";
+AM_TESTS_ENVIRONMENT += export TST_DARSHAN_LOG_PATH="$(__DARSHAN_LOG_PATH)";
+AM_TESTS_ENVIRONMENT += export USERNAME_ENV="$(USERNAME_ENV)";
+AM_TESTS_ENVIRONMENT += export HAVE_MPI_LARGE_COUNT="$(HAVE_MPI_LARGE_COUNT)";
+AM_TESTS_ENVIRONMENT += export check_PROGRAMS="$(check_PROGRAMS)";
+
+TESTS = tst_runs.sh
+TEST_EXTENSIONS = .sh
+
+EXTRA_DIST = tst_runs.sh
+