Fixed Android build warnings for old NDK

diff --git a/modules/ts/include/opencv2/ts/ts.hpp b/modules/ts/include/opencv2/ts/ts.hpp
index dec80b6..b51bfb7 100644 (file)
--- a/modules/ts/include/opencv2/ts/ts.hpp
+++ b/modules/ts/include/opencv2/ts/ts.hpp
@@ -14,7 +14,11 @@
 # include <android/api-level.h>
 # define GTEST_HAS_CLONE (__ANDROID_API__ > 7 && __arm__)
 # define GTEST_HAS_POSIX_RE (__ANDROID_API__ > 7)
-# define GTEST_HAS_STD_WSTRING _GLIBCXX_USE_WCHAR_T
+# if defined _GLIBCXX_USE_WCHAR_T && _GLIBCXX_USE_WCHAR_T
+#  define GTEST_HAS_STD_WSTRING 1
+# else
+#  define GTEST_HAS_STD_WSTRING 0
+#endif
 #endif
 
 #include <stdarg.h> // for va_list