From e16c1569c08266b48644e23ca9fa58d87c7f5786 Mon Sep 17 00:00:00 2001 From: Ramiro Polla Date: Wed, 6 Oct 2010 03:14:07 +0000 Subject: doc,win32: add note about the use of dllimport for global data in MSVC++ Originally committed as revision 25366 to svn://svn.ffmpeg.org/ffmpeg/trunk --- doc/general.texi | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'doc/general.texi') diff --git a/doc/general.texi b/doc/general.texi index faf2aec..fd5482c 100644 --- a/doc/general.texi +++ b/doc/general.texi @@ -990,6 +990,15 @@ of DLL files, but the ones that are actually used to run your application are the ones with a major version number in their filenames (i.e. @file{avcodec-51.dll}). +FFmpeg headers do not declare global data for Windows DLLs through the usual +dllexport/dllimport interface. Such data will be exported properly while +building, but to use them in your MSVC++ code you will have to edit the +appropriate headers and mark the data as dllimport. For example, in +libavutil/pixdesc.h you should have: +@example +extern __declspec(dllimport) const AVPixFmtDescriptor av_pix_fmt_descriptors[]; +@end example + @subsection Cross compilation for Windows with Linux You must use the MinGW cross compilation tools available at -- cgit v1.1