diff --git a/modules/calib3d/perf/perf_precomp.hpp b/modules/calib3d/perf/perf_precomp.hpp
index 16162737e9..ce79542722 100644
--- a/modules/calib3d/perf/perf_precomp.hpp
+++ b/modules/calib3d/perf/perf_precomp.hpp
@@ -1,3 +1,7 @@
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#endif
+
 #ifndef __OPENCV_PERF_PRECOMP_HPP__
 #define __OPENCV_PERF_PRECOMP_HPP__
 
diff --git a/modules/calib3d/test/test_precomp.hpp b/modules/calib3d/test/test_precomp.hpp
index 43792d6562..62d876ffc9 100644
--- a/modules/calib3d/test/test_precomp.hpp
+++ b/modules/calib3d/test/test_precomp.hpp
@@ -1,3 +1,7 @@
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#endif
+
 #ifndef __OPENCV_TEST_PRECOMP_HPP__
 #define __OPENCV_TEST_PRECOMP_HPP__
 
diff --git a/modules/contrib/test/test_precomp.hpp b/modules/contrib/test/test_precomp.hpp
index 2536eadb2c..f9cbc917c5 100644
--- a/modules/contrib/test/test_precomp.hpp
+++ b/modules/contrib/test/test_precomp.hpp
@@ -1,3 +1,7 @@
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#endif
+
 #ifndef __OPENCV_TEST_PRECOMP_HPP__
 #define __OPENCV_TEST_PRECOMP_HPP__
 
diff --git a/modules/core/perf/perf_precomp.hpp b/modules/core/perf/perf_precomp.hpp
index 8e56cbc398..22a4abdd9d 100644
--- a/modules/core/perf/perf_precomp.hpp
+++ b/modules/core/perf/perf_precomp.hpp
@@ -1,3 +1,7 @@
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#endif
+
 #ifndef __OPENCV_PERF_PRECOMP_HPP__
 #define __OPENCV_PERF_PRECOMP_HPP__
 
diff --git a/modules/core/test/test_precomp.hpp b/modules/core/test/test_precomp.hpp
index 887f915809..f00212ff4f 100644
--- a/modules/core/test/test_precomp.hpp
+++ b/modules/core/test/test_precomp.hpp
@@ -1,3 +1,7 @@
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#endif
+
 #ifndef __OPENCV_TEST_PRECOMP_HPP__
 #define __OPENCV_TEST_PRECOMP_HPP__
 
diff --git a/modules/features2d/perf/perf_precomp.hpp b/modules/features2d/perf/perf_precomp.hpp
index eaf9d77ca4..b8608bf9a9 100644
--- a/modules/features2d/perf/perf_precomp.hpp
+++ b/modules/features2d/perf/perf_precomp.hpp
@@ -1,3 +1,7 @@
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#endif
+
 #ifndef __OPENCV_PERF_PRECOMP_HPP__
 #define __OPENCV_PERF_PRECOMP_HPP__
 
diff --git a/modules/features2d/test/test_precomp.hpp b/modules/features2d/test/test_precomp.hpp
index b787504f9d..29be5d4e27 100644
--- a/modules/features2d/test/test_precomp.hpp
+++ b/modules/features2d/test/test_precomp.hpp
@@ -1,3 +1,7 @@
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#endif
+
 #ifndef __OPENCV_TEST_PRECOMP_HPP__
 #define __OPENCV_TEST_PRECOMP_HPP__
 
diff --git a/modules/gpu/perf/perf_precomp.hpp b/modules/gpu/perf/perf_precomp.hpp
index 472f7501b0..b907777294 100644
--- a/modules/gpu/perf/perf_precomp.hpp
+++ b/modules/gpu/perf/perf_precomp.hpp
@@ -1,3 +1,7 @@
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#endif
+
 #ifndef __OPENCV_PERF_PRECOMP_HPP__
 #define __OPENCV_PERF_PRECOMP_HPP__
 
diff --git a/modules/gpu/perf_cpu/perf_cpu_precomp.hpp b/modules/gpu/perf_cpu/perf_cpu_precomp.hpp
index f57b08cd7e..b755abbf19 100644
--- a/modules/gpu/perf_cpu/perf_cpu_precomp.hpp
+++ b/modules/gpu/perf_cpu/perf_cpu_precomp.hpp
@@ -1,3 +1,7 @@
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#endif
+
 #ifndef __OPENCV_PERF_CPU_PRECOMP_HPP__
 #define __OPENCV_PERF_CPU_PRECOMP_HPP__
 
diff --git a/modules/gpu/test/precomp.hpp b/modules/gpu/test/precomp.hpp
index a09ffc3d89..5ee13e6bde 100644
--- a/modules/gpu/test/precomp.hpp
+++ b/modules/gpu/test/precomp.hpp
@@ -39,6 +39,10 @@
 //
 //M*/
 
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#endif
+
 #ifndef __OPENCV_TEST_PRECOMP_HPP__
 #define __OPENCV_TEST_PRECOMP_HPP__
 
diff --git a/modules/highgui/perf/perf_precomp.hpp b/modules/highgui/perf/perf_precomp.hpp
index 17a338e88f..f77c1c4acd 100644
--- a/modules/highgui/perf/perf_precomp.hpp
+++ b/modules/highgui/perf/perf_precomp.hpp
@@ -1,3 +1,7 @@
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#endif
+
 #ifndef __OPENCV_PERF_PRECOMP_HPP__
 #define __OPENCV_PERF_PRECOMP_HPP__
 
diff --git a/modules/highgui/test/test_precomp.hpp b/modules/highgui/test/test_precomp.hpp
index bbf924e672..91aff1fbd2 100644
--- a/modules/highgui/test/test_precomp.hpp
+++ b/modules/highgui/test/test_precomp.hpp
@@ -1,3 +1,7 @@
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#endif
+
 #ifndef __OPENCV_TEST_PRECOMP_HPP__
 #define __OPENCV_TEST_PRECOMP_HPP__
 
@@ -40,7 +44,7 @@
     /*defined(HAVE_OPENNI)     || too specialized */ \
     defined(HAVE_FFMPEG)       || \
     defined(WIN32) /* assume that we have ffmpeg */
-    
+
 #  define BUILD_WITH_VIDEO_INPUT_SUPPORT 1
 #else
 #  define BUILD_WITH_VIDEO_INPUT_SUPPORT 0
@@ -61,19 +65,19 @@ namespace cvtest
 {
 
 string fourccToString(int fourcc);
-    
+
 struct VideoFormat
 {
     VideoFormat() { fourcc = -1; }
     VideoFormat(const string& _ext, int _fourcc) : ext(_ext), fourcc(_fourcc) {}
     bool empty() const { return ext.empty(); }
-    
+
     string ext;
     int fourcc;
 };
-    
+
 extern const VideoFormat g_specific_fmt_list[];
-    
+
 }
 
 #endif
diff --git a/modules/imgproc/perf/perf_precomp.hpp b/modules/imgproc/perf/perf_precomp.hpp
index 3653f1f262..d85331ee68 100644
--- a/modules/imgproc/perf/perf_precomp.hpp
+++ b/modules/imgproc/perf/perf_precomp.hpp
@@ -1,3 +1,7 @@
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#endif
+
 #ifndef __OPENCV_PERF_PRECOMP_HPP__
 #define __OPENCV_PERF_PRECOMP_HPP__
 
diff --git a/modules/imgproc/test/test_precomp.hpp b/modules/imgproc/test/test_precomp.hpp
index f28d167d0b..f58def6686 100644
--- a/modules/imgproc/test/test_precomp.hpp
+++ b/modules/imgproc/test/test_precomp.hpp
@@ -1,3 +1,7 @@
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#endif
+
 #ifndef __OPENCV_TEST_PRECOMP_HPP__
 #define __OPENCV_TEST_PRECOMP_HPP__
 
diff --git a/modules/legacy/test/test_precomp.hpp b/modules/legacy/test/test_precomp.hpp
index 06b45a716e..54bfe2b718 100644
--- a/modules/legacy/test/test_precomp.hpp
+++ b/modules/legacy/test/test_precomp.hpp
@@ -1,3 +1,7 @@
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#endif
+
 #ifndef __OPENCV_TEST_PRECOMP_HPP__
 #define __OPENCV_TEST_PRECOMP_HPP__
 
diff --git a/modules/ml/test/test_precomp.hpp b/modules/ml/test/test_precomp.hpp
index a939d1ce1e..407ad9d32a 100644
--- a/modules/ml/test/test_precomp.hpp
+++ b/modules/ml/test/test_precomp.hpp
@@ -1,3 +1,7 @@
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#endif
+
 #ifndef __OPENCV_TEST_PRECOMP_HPP__
 #define __OPENCV_TEST_PRECOMP_HPP__
 
diff --git a/modules/nonfree/perf/perf_precomp.hpp b/modules/nonfree/perf/perf_precomp.hpp
index 64e2dba81e..66eea25995 100644
--- a/modules/nonfree/perf/perf_precomp.hpp
+++ b/modules/nonfree/perf/perf_precomp.hpp
@@ -1,3 +1,7 @@
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#endif
+
 #ifndef __OPENCV_PERF_PRECOMP_HPP__
 #define __OPENCV_PERF_PRECOMP_HPP__
 
diff --git a/modules/nonfree/test/test_precomp.hpp b/modules/nonfree/test/test_precomp.hpp
index 01a3978bcf..ac4ce4b0ef 100644
--- a/modules/nonfree/test/test_precomp.hpp
+++ b/modules/nonfree/test/test_precomp.hpp
@@ -1,3 +1,7 @@
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#endif
+
 #ifndef __OPENCV_TEST_PRECOMP_HPP__
 #define __OPENCV_TEST_PRECOMP_HPP__
 
diff --git a/modules/objdetect/perf/perf_precomp.hpp b/modules/objdetect/perf/perf_precomp.hpp
index deb362ef89..2682e1c206 100644
--- a/modules/objdetect/perf/perf_precomp.hpp
+++ b/modules/objdetect/perf/perf_precomp.hpp
@@ -1,3 +1,7 @@
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#endif
+
 #ifndef __OPENCV_PERF_PRECOMP_HPP__
 #define __OPENCV_PERF_PRECOMP_HPP__
 
diff --git a/modules/objdetect/test/test_precomp.hpp b/modules/objdetect/test/test_precomp.hpp
index 77ff308586..c7bd0e340f 100644
--- a/modules/objdetect/test/test_precomp.hpp
+++ b/modules/objdetect/test/test_precomp.hpp
@@ -1,3 +1,7 @@
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#endif
+
 #ifndef __OPENCV_TEST_PRECOMP_HPP__
 #define __OPENCV_TEST_PRECOMP_HPP__
 
diff --git a/modules/photo/perf/perf_precomp.hpp b/modules/photo/perf/perf_precomp.hpp
index 506081f0de..44ccb09861 100644
--- a/modules/photo/perf/perf_precomp.hpp
+++ b/modules/photo/perf/perf_precomp.hpp
@@ -1,3 +1,7 @@
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#endif
+
 #ifndef __OPENCV_PERF_PRECOMP_HPP__
 #define __OPENCV_PERF_PRECOMP_HPP__
 
diff --git a/modules/photo/test/test_precomp.hpp b/modules/photo/test/test_precomp.hpp
index 215b5e5c83..6f96e4ac36 100644
--- a/modules/photo/test/test_precomp.hpp
+++ b/modules/photo/test/test_precomp.hpp
@@ -1,3 +1,7 @@
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#endif
+
 #ifndef __OPENCV_TEST_PRECOMP_HPP__
 #define __OPENCV_TEST_PRECOMP_HPP__
 
diff --git a/modules/stitching/perf/perf_precomp.hpp b/modules/stitching/perf/perf_precomp.hpp
index 29f9bf5bac..c8d326ef4f 100644
--- a/modules/stitching/perf/perf_precomp.hpp
+++ b/modules/stitching/perf/perf_precomp.hpp
@@ -1,3 +1,7 @@
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#endif
+
 #ifndef __OPENCV_PERF_PRECOMP_HPP__
 #define __OPENCV_PERF_PRECOMP_HPP__
 
diff --git a/modules/stitching/test/test_precomp.hpp b/modules/stitching/test/test_precomp.hpp
index 867753ff3c..4d3bd230fa 100644
--- a/modules/stitching/test/test_precomp.hpp
+++ b/modules/stitching/test/test_precomp.hpp
@@ -1,3 +1,7 @@
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#endif
+
 #ifndef __OPENCV_TEST_PRECOMP_HPP__
 #define __OPENCV_TEST_PRECOMP_HPP__
 
diff --git a/modules/ts/include/opencv2/ts/ts.hpp b/modules/ts/include/opencv2/ts/ts.hpp
index 0c68ddfd15..b968c55c25 100644
--- a/modules/ts/include/opencv2/ts/ts.hpp
+++ b/modules/ts/include/opencv2/ts/ts.hpp
@@ -41,9 +41,9 @@
 #ifndef GTEST_USES_POSIX_RE
 #  define GTEST_USES_POSIX_RE 0
 #endif
-#ifdef __GNUC__
-#  pragma GCC diagnostic ignored "-Wmissing-declarations"
-#endif
+// #ifdef __GNUC__
+// #  pragma GCC diagnostic ignored "-Wmissing-declarations"
+// #endif
 
 #include "opencv2/core/core.hpp"
 
diff --git a/modules/video/perf/perf_precomp.hpp b/modules/video/perf/perf_precomp.hpp
index 5378a490c0..4082791419 100644
--- a/modules/video/perf/perf_precomp.hpp
+++ b/modules/video/perf/perf_precomp.hpp
@@ -1,3 +1,7 @@
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#endif
+
 #ifndef __OPENCV_VIDEO_PRECOMP_HPP__
 #define __OPENCV_VIDEO_PRECOMP_HPP__
 
diff --git a/modules/video/test/test_precomp.hpp b/modules/video/test/test_precomp.hpp
index 71c5e5b7d2..d6e0e97dd5 100644
--- a/modules/video/test/test_precomp.hpp
+++ b/modules/video/test/test_precomp.hpp
@@ -1,3 +1,7 @@
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#endif
+
 #ifndef __OPENCV_TEST_PRECOMP_HPP__
 #define __OPENCV_TEST_PRECOMP_HPP__