Compile OpenCV with GCC visibility set to hidden

modules/contrib/include/opencv2/contrib/detection_based_tracker.hpp

@@ -1,6 +1,6 @@
 #pragma once
 
-#if defined(__linux__) || defined(LINUX) || defined(__APPLE__) || defined(ANDROID)
+#if defined(__linux__) || defined(LINUX) || defined(__APPLE__) || defined(__ANDROID__)
 
 #include <opencv2/core.hpp>
 #include <opencv2/objdetect.hpp>
@@ -9,7 +9,7 @@
 
 namespace cv
 {
-class DetectionBasedTracker
+class CV_EXPORTS DetectionBasedTracker
 {
     public:
         struct Parameters

modules/core/include/opencv2/core/cvdef.h

@@ -73,8 +73,10 @@
 #  define CV_ENABLE_UNROLLED 1
 #endif
 
-#if (defined WIN32 || defined _WIN32 || defined WINCE) && defined CVAPI_EXPORTS
+#if (defined WIN32 || defined _WIN32 || defined WINCE || defined __CYGWIN__) && defined CVAPI_EXPORTS
 #  define CV_EXPORTS __declspec(dllexport)
+#elif defined __GNUC__ && __GNUC__ >= 4
+#  define CV_EXPORTS __attribute__ ((visibility ("default")))
 #else
 #  define CV_EXPORTS
 #endif

modules/core/include/opencv2/core/cvstd.hpp

@@ -174,7 +174,7 @@ public:
   To make it all work, you need to specialize Ptr<>::delete_obj(), like:
 
   \code
-  template<> void Ptr<MyObjectType>::delete_obj() { call_destructor_func(obj); }
+  template<> CV_EXPORTS void Ptr<MyObjectType>::delete_obj() { call_destructor_func(obj); }
   \endcode
 
   \note{if MyObjectType is a C++ class with a destructor, you do not need to specialize delete_obj(),

modules/core/include/opencv2/core/types_c.h

@@ -272,7 +272,11 @@ CV_INLINE double cvRandReal( CvRNG* rng )
 #define IPL_BORDER_REFLECT    2
 #define IPL_BORDER_WRAP       3
 
-typedef struct CV_EXPORTS _IplImage
+typedef struct
+#ifdef __cplusplus
+  CV_EXPORTS
+#endif
+_IplImage
 {
     int  nSize;             /* sizeof(IplImage) */
     int  ID;                /* version (=0)*/
@@ -563,7 +567,11 @@ CV_INLINE int cvIplDepth( int type )
 #define CV_MAX_DIM            32
 #define CV_MAX_DIM_HEAP       1024
 
-typedef struct CV_EXPORTS CvMatND
+typedef struct
+#ifdef __cplusplus
+  CV_EXPORTS
+#endif
+CvMatND
 {
     int type;
     int dims;
@@ -610,7 +618,11 @@ CvMatND;
 
 struct CvSet;
 
-typedef struct CV_EXPORTS CvSparseMat
+typedef struct
+#ifdef __cplusplus
+  CV_EXPORTS
+#endif
+CvSparseMat
 {
     int type;
     int dims;

modules/gpu/perf4au/main.cpp

@@ -42,9 +42,7 @@
 
 #include <cstdio>
 
-#ifdef HAVE_CVCONFIG_H
 #include "cvconfig.h"
-#endif
 #include "opencv2/core.hpp"
 #include "opencv2/gpu.hpp"
 #include "opencv2/highgui.hpp"

modules/highgui/include/opencv2/highgui.hpp

@@ -542,8 +542,8 @@ protected:
     Ptr<CvVideoWriter> writer;
 };
 
-template<> void Ptr<CvCapture>::delete_obj();
-template<> void Ptr<CvVideoWriter>::delete_obj();
+template<> CV_EXPORTS void Ptr<CvCapture>::delete_obj();
+template<> CV_EXPORTS void Ptr<CvVideoWriter>::delete_obj();
 
 } // cv
 

modules/python/src2/cv2.cpp

@@ -1205,11 +1205,7 @@ static int to_ok(PyTypeObject *to)
   return (PyType_Ready(to) == 0);
 }
 
-extern "C"
-#if defined WIN32 || defined _WIN32
-__declspec(dllexport)
-#endif
-void initcv2();
+extern "C" CV_EXPORTS void initcv2();
 
 void initcv2()
 {

modules/ts/include/opencv2/ts.hpp

@@ -1,16 +1,7 @@
 #ifndef __OPENCV_GTESTCV_HPP__
 #define __OPENCV_GTESTCV_HPP__
 
-#ifdef HAVE_CVCONFIG_H
-#  include "cvconfig.h"
-#endif
-
-#ifndef GTEST_CREATE_SHARED_LIBRARY
-#ifdef BUILD_SHARED_LIBS
-#define GTEST_LINKED_AS_SHARED_LIBRARY 1
-#endif
-#endif
-
+#include "opencv2/core/cvdef.h"
 #include <stdarg.h> // for va_list
 
 #ifdef _MSC_VER

modules/ts/include/opencv2/ts/ts_gtest.h

@@ -1912,19 +1912,7 @@ using ::std::tuple_size;
 
 #endif  // GTEST_HAS_SEH
 
-#ifdef _MSC_VER
-
-# if GTEST_LINKED_AS_SHARED_LIBRARY
-#  define GTEST_API_ __declspec(dllimport)
-# elif GTEST_CREATE_SHARED_LIBRARY
-#  define GTEST_API_ __declspec(dllexport)
-# endif
-
-#endif  // _MSC_VER
-
-#ifndef GTEST_API_
-# define GTEST_API_
-#endif
+#define GTEST_API_ CV_EXPORTS
 
 #ifdef __GNUC__
 // Ask the compiler to never inline a given function.

modules/ts/include/opencv2/ts/ts_perf.hpp

@@ -1,16 +1,6 @@
 #ifndef __OPENCV_TS_PERF_HPP__
 #define __OPENCV_TS_PERF_HPP__
 
-#ifdef HAVE_CVCONFIG_H
-#  include "cvconfig.h"
-#endif
-
-#ifndef GTEST_CREATE_SHARED_LIBRARY
-#  ifdef BUILD_SHARED_LIBS
-#    define GTEST_LINKED_AS_SHARED_LIBRARY 1
-#  endif
-#endif
-
 #include "opencv2/core.hpp"
 #include "ts_gtest.h"