undefined reference to __imp_opj_xxx
keyword:
ffmpeg,openjpeg,OPJ_EXPORTS,OPJ_STATIC,opj_version,__imp_opj 出错原因:
1. __declspec(dllexport) / __declspec(dllimport)
2. __stdcall 解决方法:
openjpeg-2.1.0-modify.to.static.patch --- src/lib/openjp2/openjpeg.h.orig 2014-04-29 20:58:10 +0800
+++ src/lib/openjp2/openjpeg.h 2016-03-26 01:07:32 +0800
@@ -80,14 +80,14 @@
/* http://gcc.gnu.org/wiki/Visibility */
#if __GNUC__ >= 4
#define OPJ_API __attribute__ ((visibility ("default")))
-#define OPJ_LOCAL __attribute__ ((visibility ("hidden")))
+#define OPJ_LOCAL __attribute__ ((visibility ("default")))
#else
#define OPJ_API
#define OPJ_LOCAL
#endif
#define OPJ_CALLCONV
#else
-#define OPJ_CALLCONV __stdcall
+#define OPJ_CALLCONV
/*
The following ifdef block is the standard way of creating macros which make exporting
from a DLL simpler. All files within this DLL are compiled with the OPJ_EXPORTS
@@ -97,9 +97,9 @@
defined with this macro as being exported.
*/
#if defined(OPJ_EXPORTS) || defined(DLL_EXPORT)
-#define OPJ_API __declspec(dllexport)
+#define OPJ_API __attribute__ ((visibility ("default")))
#else
-#define OPJ_API __declspec(dllimport)
+#define OPJ_API
#endif /* OPJ_EXPORTS */
#endif /* !OPJ_STATIC || !_WIN32 */ --- src/lib/openjp3d/openjp3d.h.orig 2014-04-29 20:58:10 +0800
+++ src/lib/openjp3d/openjp3d.h 2016-03-26 00:08:35 +0800
@@ -64,9 +64,9 @@
defined with this macro as being exported.
*/
#if defined(OPJ_EXPORTS) || defined(DLL_EXPORT)
-#define OPJ_API __declspec(dllexport)
+#define OPJ_API __attribute__((visibility ("default")))
#else
-#define OPJ_API __declspec(dllimport)
+#define OPJ_API
#endif /* OPJ_EXPORTS */
#endif /* !OPJ_STATIC || !WIN32 */ --- src/lib/openmj2/openjpeg.h.orig 2014-04-29 20:58:10 +0800
+++ src/lib/openmj2/openjpeg.h 2016-03-26 00:09:40 +0800
@@ -66,9 +66,9 @@
defined with this macro as being exported.
*/
#if defined(OPJ_EXPORTS) || defined(DLL_EXPORT)
-#define OPJ_API __declspec(dllexport)
+#define OPJ_API __attribute__((visibility ("default")))
#else
-#define OPJ_API __declspec(dllimport)
+#define OPJ_API
#endif /* OPJ_EXPORTS */
#endif /* !OPJ_STATIC || !_WIN32 */ --- thirdparty/include/zconf.h.orig 2014-04-29 20:58:10 +0800
+++ thirdparty/include/zconf.h 2016-03-25 11:15:49 +0800
@@ -277,9 +277,9 @@
# ifdef ZLIB_DLL
# if defined(WIN32) && (!defined(__BORLANDC__) || (__BORLANDC__ >= 0x500))
# ifdef ZLIB_INTERNAL
-# define ZEXTERN extern __declspec(dllexport)
+# define ZEXTERN extern __attribute__((visibility ("default")))
# else
-# define ZEXTERN extern __declspec(dllimport)
+# define ZEXTERN extern
# endif
# endif
# endif /* ZLIB_DLL */
@@ -306,11 +306,11 @@
#if defined (__BEOS__)
# ifdef ZLIB_DLL
# ifdef ZLIB_INTERNAL
-# define ZEXPORT __declspec(dllexport)
-# define ZEXPORTVA __declspec(dllexport)
+# define ZEXPORT __attribute__((visibility ("default")))
+# define ZEXPORTVA __attribute__((visibility ("default")))
# else
-# define ZEXPORT __declspec(dllimport)
-# define ZEXPORTVA __declspec(dllimport)
+# define ZEXPORT
+# define ZEXPORTVA
# endif
# endif
#endif
--- thirdparty/liblcms2/include/lcms2.h.orig 2016-03-26 00:00:04 +0800
+++ thirdparty/liblcms2/include/lcms2.h 2016-03-25 23:59:52 +0800
@@ -195,14 +195,14 @@
#ifdef CMS_IS_WINDOWS_
# if defined(CMS_DLL) || defined(CMS_DLL_BUILD)
# ifdef __BORLANDC__
-# define CMSEXPORT __stdcall _export
+# define CMSEXPORT __attribute__((visibility ("default")))
# define CMSAPI
# else
# define CMSEXPORT _stdcall
# ifdef CMS_DLL_BUILD
-# define CMSAPI __declspec(dllexport)
+# define CMSAPI __attribute__((visibility ("default")))
# else
-# define CMSAPI __declspec(dllimport)
+# define CMSAPI
# endif
# endif
# else
--- thirdparty/libpng/pngconf.h.orig 2014-04-29 20:58:10 +0800
+++ thirdparty/libpng/pngconf.h 2016-03-25 11:15:20 +0800
@@ -1315,9 +1315,9 @@ # ifndef PNG_IMPEXP
# ifdef PNG_BUILD_DLL
-# define PNG_IMPEXP __declspec(dllexport)
+# define PNG_IMPEXP __attribute__((visibility ("default")))
# else
-# define PNG_IMPEXP __declspec(dllimport)
+# define PNG_IMPEXP
# endif
# endif
# endif /* PNG_IMPEXP */