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gstconfig.h: Always use dllexport/import on Windows

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__declspec(dllexport/import) are supported by GCC and are needed for
properly generating code that fetches the values of constants from DLLs
built with __declspec(dllexport) which happens when anything using
GST_EXPORT is built with MSVC.

See: https://msdn.microsoft.com/en-us/library/619w14ds.aspx

Essentially, if you built gstreamer with MSVC and then tried to use
constants from it (such as GST_TYPE_CAPS) in a plugin, GCC would
retrieve the address of the value instead of the value itself.
This commit is contained in:
Nirbheek Chauhan 2016-05-20 00:24:54 +05:30 committed by Tim-Philipp Müller
parent 603b8188bb
commit 161eee6694
1 changed files with 2 additions and 2 deletions
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4
gst/gstconfig.h.in
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@ -133,14 +133,14 @@
* On Windows, this exports the plugin definition from the DLL.
* On other platforms, this gets defined as a no-op.
*/
#ifdef _MSC_VER
#ifdef _WIN32 /* Both 32-bit and 64-bit; both GCC and MSVC */
#define GST_PLUGIN_EXPORT __declspec(dllexport) extern
#ifdef GST_EXPORTS
#define GST_EXPORT __declspec(dllexport) extern
#else
#define GST_EXPORT __declspec(dllimport) extern
#endif
#else /* not _MSC_VER */
#else /* !_WIN32 */
#define GST_PLUGIN_EXPORT
#if (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590))
#define GST_EXPORT extern __attribute__ ((visibility ("default")))