app/test: fix build constructor with gcc < 4.4

Build app/test will be failed for function only defined but not used.
test_prefetch.c:65: error: ‘testfn_prefetch_cmd’ defined but not used

Add attribute used in test function declaration can fix this.
static void __attribute__((used)) testfn_##t(void);

Fixes: 727909c59231 ("app/test: introduce dynamic commands list")

Signed-off-by: Marvin Liu <yong.liu@intel.com>

diff --git a/app/test/test.h b/app/test/test.h
index 5450986..62eb51d 100644 (file)
--- a/app/test/test.h
+++ b/app/test/test.h
@@ -169,7 +169,7 @@ struct test_command {
 void add_test_command(struct test_command *t);
 
 #define REGISTER_TEST_COMMAND(t) \
-static void testfn_##t(void);\
+static void __attribute__((used)) testfn_##t(void);\
 void __attribute__((constructor, used)) testfn_##t(void)\
 {\
        add_test_command(&t);\