fixed #2297, #2300; fixed several warnings

modules/ts/src/ts_gtest.cpp

@@ -5896,7 +5896,7 @@ bool SkipPrefix(const char* prefix, const char** pstr) {
 // part can be omitted.
 //
 // Returns the value of the flag, or NULL if the parsing failed.
-const char* ParseFlagValue(const char* str,
+static const char* ParseFlagValue(const char* str,
                            const char* flag,
                            bool def_optional) {
   // str and flag must not be NULL.
@@ -7221,12 +7221,14 @@ void StackLowerThanAddress(const void* ptr, bool* result) {
   *result = (&dummy < ptr);
 }
 
+#if GTEST_HAS_CLONE    
 static bool StackGrowsDown() {
   int dummy;
   bool result;
   StackLowerThanAddress(&dummy, &result);
   return result;
 }
+#endif
 
 // Spawns a child process with the same executable as the current process in
 // a thread-safe manner and instructs it to run the death test.  The