gl_basic: Print usage error and exit if invalid args are given

This patch also adds missing newlines to those error messages.

Signed-off-by: Chad Versace <chad.versace@linux.intel.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/examples/gl_basic.c b/examples/gl_basic.c
index 6f64016..c7f28b5 100644
--- a/examples/gl_basic.c
+++ b/examples/gl_basic.c
@@ -211,16 +211,16 @@ parse_args(int argc, char *argv[], struct options *opts)
     arg = argv[1];
     ok = enum_map_translate_str(platform_map, arg, &opts->platform);
     if (!ok) {
-        fprintf(stderr, "error: '%s' is not a valid platform", arg);
-        return false;
+        fprintf(stderr, "error: '%s' is not a valid platform\n", arg);
+        error_usage();
     }
 
     // Set context_api.
     arg = argv[2];
     ok = enum_map_translate_str(context_api_map, arg, &opts->context_api);
     if (!ok) {
-        fprintf(stderr, "error: '%s' is not a valid API for a GL context", arg);
-        return false;
+        fprintf(stderr, "error: '%s' is not a valid API for a GL context\n", arg);
+        error_usage();
     }
 
     // Set dl.