Switch to gengetopt generated command line parser

Replaces the getopt based command line parser code with auto generated
code from GNU gengetopt.

The getopt based command line parser was limited to single character
options and would have required to switch to getopt_long in the future.
Also the usage message was not up to date with the parser code.

Author: cniethammer

Makefile.am

@@ -2,7 +2,12 @@
 
 bin_PROGRAMS = mpi_test_suite
 
+cmdline.c cmdline.h: cmdline.ggo
+	gengetopt < $<
+
 mpi_test_suite_SOURCES = \
+	cmdline.c \
+	cmdline.h \
 	coll/tst_coll_allgather.c \
 	coll/tst_coll_allgather_in_place.c \
 	coll/tst_coll_allreduce.c \

cmdline.ggo

@@ -0,0 +1,20 @@
+args "--default-optional"
+
+option "test" t "tests or test-classes" string default="all"
+option "comm" c "communicators or commicator-classes" string default="all"
+option "datatype" d "datatypes of datatype-classes" string default="all"
+option "num-values" n "number of values to communicate in tests" string default="1000"
+text "\n"
+text "All multiple test-/comm-/datatype-names and num-values must be comma-separated. \
+Names are not case-sensitive, due to spaces in names, propper quoting should be used. \
+The special name 'all' can be used to select all tests/comms/datatypes. To exclude a \
+test/comm/datatype prefix it with '^' but be aware, that the selection will happen \
+in order, so use 'all,^exclude'."
+text "\n"
+option "atomic-io" a "enable atomicity for files in I/O for all tests that support it"
+option "num-threads" j "number of additional threads to execute the tests" int default="0"
+option "report" r "level of detail for test report" values="summary","run","full" default="summary"
+option "execution-mode" x "level of correctness testing" values="disabled","strict","relaxed" default="relaxed"
+
+option "verbose" v "enable verbose output for debugging purpose"
+option "list" l "list all available tests, communicators, datatypes and corresponding classes"