support: Add optstring support

This patch adds an option to test to add small command line option
through CMDLINE_OPTSTRING define.  For instance:

  #define CMDLINE_OPTSTRING "vd"

  static void
  cmdline_process_function (int c)
  {
    switch (c):
      'v':
        /* process '-v' option.  */
      break;
      'd':
        /* process '-d' option.  */
      break;
  }
  #define CMDLINE_PROCESS cmdline_process_function

It will add both '-v' and '-d' along with already default long options.

	* support/support_test_main.c (support_test_main):  Use optstring
	member for option string in getopt_long.
	* support/test-driver.c: Add comment about CMDLINE_OPTSTRING.
	(CMDLINE_OPTSTRING): New define.
	* support/test-driver.h (test_config): Add optstring member.

1 files changed, 8 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 70faa63f6e..8fb6aaae0c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2017-06-15  Adhemerval Zanella  <adhemerval.zanella@linaro.org>
+
+	 * support/support_test_main.c (support_test_main):  Use optstring
+	 member for option string in getopt_long.
+	 * support/test-driver.c: Add comment about CMDLINE_OPTSTRING.
+	 (CMDLINE_OPTSTRING): New define.
+	 * support/test-driver.h (test_config): Add optstring member.
+
 2017-06-15  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add